Page 1: Installation And Operation Manual
Advanced Satellite Modem (18 kbps – 25 Mbps) Installation and Operation Manual For Firmware Version 1.1.1 or higher Part Number MN-CDM-425 Revision 0 IMPORTANT NOTE: The information contained in this document supersedes all previously published information regarding this product. Product specifications are subject to change without prior notice.
Page 2: Revision History
CDM-425 Advanced Satellite Modem Revision 0 Copyright © 2017 Comtech EF Data. All rights reserved. Printed in the USA. Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: 480.333.2161 Revision History Date Description Oct 2017 Initial Release.
Page 3: Table Of Contents
European Union RoHS Directive (2002/95/EC) ................. xxv European Union Telecommunications Terminal Equipment Directive (91/263/EEC) ......xxv CE Mark ............................xxv Product Support ............................xxv Comtech EF Data Headquarters ......................xxvi Warranty Policy ............................xxvi Limitations of Warranty .......................... xxvi Exclusive Remedies ..........................xxvii CHAPTER 1.
Page 4 CDM-425 Advanced Satellite Modem Revision 0 1.4.8 Miscellaneous ......................... 1–34 1.4.9 Approvals ..........................1–34 CHAPTER 2. INSTALLATION ......................2–1 Unpack and Inspect the Shipment .................... 2–1 Modem - Rack Enclosure Installation ..................2–2 2.2.1 Optional Rear-Mounting Support Brackets Kits Installation ............2–5 Modem Configuration .........................
Page 5 CDM-425 Advanced Satellite Modem Revision 0 Ethernet FTP Upload Procedure ....................4–3 4.3.1 Getting Started: Prepare for the Firmware Download ............... 4–3 4.3.2 Download and Extract the Firmware Update ................4–8 4.3.3 Perform the Ethernet FTP Upload Procedure ................ 4–10 CHAPTER 5.
Page 6 CDM-425 Advanced Satellite Modem Revision 0 6.2.1.8 CONFIG: CnC ......................6–41 CONFIG: CnC  Mode ................... 6–41 6.2.1.8.1 CONFIG: CnC  CONFIG: CnC  Freq-Offset ............. 6–42 6.2.1.8.2 CONFIG: CnC  Search-Delay ................6–42 6.2.1.8.3 CONFIG: CnC  PMSI-Control ................6–43 6.2.1.8.4...
Page 7 CDM-425 Advanced Satellite Modem Revision 0 6.2.4.6 Info: Clocks ........................6–91 6.2.4.7 Info: EDMAC ....................... 6–91 6.2.4.8 Info: Drop ........................6–91 6.2.4.9 Info: Insert ........................6–91 6.2.4.10 Info: Remote ........................ 6–92 6.2.4.11 Info: Alarm-Mask ......................6–92 6.2.4.12 Info: Misc ........................6–92 6.2.5...
Page 8 CDM-425 Advanced Satellite Modem Revision 0 7.5.4.1 Home Tab ........................7–15 7.5.4.1.1 Home | Home Page ....................7–15 7.5.4.1.2 Home | Contact ......................7–16 7.5.4.1.3 Home | Support ......................7–17 7.5.4.2 Admin Tab ........................7–18 7.5.4.2.1 Admin | Access ......................7–18 7.5.4.2.2...
Page 9 CDM-425 Advanced Satellite Modem Revision 0 8.5.9 LNB Parameters (L-Band Device) ..................8–60 8.5.10 Ethernet Parameters ....................... 8–61 CHAPTER 9. TELNET COMMAND LINE INTERFACE (CLI) OPERATION ........9–1 Overview ............................9–1 9.1.1 Interface Access ........................9–1 9.1.2 Terminal Emulator Considerations .................... 9–2 9.1.2.1...
Page 10 10.3.3.3.1 ODU: BUC:PwrSupply+Ref (Power Supply and Reference) ......... 10–10 10.3.3.3.2 ODU: LNB:PwrSupply+Ref (Power Supply and Reference) ......... 10–12 10.3.3.3.3 ODU: FSK-control ....................10–13 10.4 ODU Operations via the CDM-425 HTTP (Web Server) Interface ........10–38 10.4.1 Web Server Interface and Menu Tree ................... 10–38 Table of Contents viii...
Page 11 CDM-425 Advanced Satellite Modem Revision 0 10.4.2 Web Page Descriptions ......................10–40 10.4.2.1 Configuration | BUC (Block Up Converter) ..............10–40 10.4.2.2 Configuration | LNB (Low Noise Block Down Converter) .......... 10–41 10.4.2.3 Status | Modem Logs | Base Modem ................ 10–42 10.4.2.4...
Page 12 CDM-425 Advanced Satellite Modem Revision 0 Receive Clocking ........................E–4 E.3.1 Buffer Disabled (RX Satellite) ....................E–4 E.3.2 Buffer Enabled, TX=RX (TX Terrestrial or Int (SCT) Clock) ............E–4 E.3.3 Buffer Enabled, RX<>TX (TX Terrestrial or Int (SCT) Clock) ........... E–4 X.21 Notes ............................
Page 13 Precision Time Protocol (PTP) ....................I–16 APPENDIX J. IP PACKET PROCESSOR OPTION ................J–1 Overview ............................J–1 J.1.1 Operational Requirements ......................J–2 CDM-425  CDM-425 Interoperability Compatibility/Limitations ..........J–2 J.1.2 IP Packet Processor Features ....................J–2 J.2.1 Streamline Encapsulation (SLE) ....................J–2 J.2.2 Modes of Operation ........................
Page 14 CDM-425 Advanced Satellite Modem Revision 0 J.3.2.3 HTTP (Web Server) Interface..................J–7 List of Supported Internet RFCs (Requests for Comment)............. J–8 IP Packet Processor Field Upgrade Procedure ................ J–9 J.5.1 Overview ........................... J–9 J.5.2 Requirements for Field Upgrade ....................J–9 J.5.3...
Page 15: List Of Tables
CDM-425 Advanced Satellite Modem Revision 0 APPENDIX O. RADIUS CLIENT......................O–1 Overview ............................. O–1 O.1.1 RADIUS List of Supported RFCs (Requests for Comment) ............ O–1 Service Types ..........................O–2 RADIUS Client..........................O–3 RADIUS Operation and Configuration ..................O–4 O.4.1 RADIUS Operation Using the Front Panel ................O–6 O.4.2 RADIUS M&C Using the HTTP (Web Server) Interface ............
Page 16: List Of Figures
Table M-2. 802.1q to Layer 2 QoS Priority Conversion ................M–5 Table O-1. RADIUS Service Types ......................O–2 LIST OF FIGURES Figure 1-1. CDM-425 Advanced Satellite Modem..................1–1 Figure 1-2. Dimensional Envelope ......................1–10 Figure 1-3. Front Panel Features ......................1–11 Figure 1-4.
Page 17 Figure 5-1. HTTP Interface – ‘Admin | FAST’ Page .................. 5–4 Figure 6-1. Front Panel Features ......................6–1 Figure 6-2. CDM-425 Principle Menu Tree (FW Ver. 1.1.1) ..............6–7 Figure 6-3. Loopback Modes ........................6–76 Figure 7-1. Telnet Command Line Interface (CLI) ..................7–7 Figure 7-2.
Page 18 CDM-425 Advanced Satellite Modem Revision 0 Figure 7-43. Status | Modem Info Page ....................7–80 Figure 7-44. Status | Traffic Statistics | Ethernet Page ................7–82 Figure 7-45. Status | Traffic Statistics | Router Page................7–83 Figure 7-46. Status | Traffic Statistics | Managed Switch Page ............... 7–84 Figure 7-47.
Page 19 Figure F-1. Conceptual Block Diagram ..................... F–3 Figure F-2. Conventional FDMA Link ......................F–5 Figure F-3. Same Link Using CDM-425 Advanced Satellite Modem and DoubleTalk Carrier-in-Carrier . F–6 Figure F-4. Duplex Link Optimization ......................F–6 Figure F-5. DoubleTalk Carrier-in-Carrier Signals..................F–8 Figure F-6.
Page 20 CDM-425 Advanced Satellite Modem Revision 0 Acronym List Acronym Description Alternating Current Adaptive Coding and Modulation Advanced Encryption Standard Advanced Network Timing AUPC Automatic Uplink Power Control Bit Error Rate Block Up Converter Constant Coding and Modulation Command Line Interface...
Page 21 CDM-425 Advanced Satellite Modem Revision 0 Acronym Description High Throughput Satellites HTTP Hypertext Transfer Protocol Insert Data In Insert Data Out IGMP Internet Group Management Protocol Local Area Network LDPC Low Density Parity Check Light Emitting Diode Low Noise Block Down Converter M&C...
Page 22 CDM-425 Advanced Satellite Modem Revision 0 Acronym Description Wide Area Network Wireless Receiver/Transmitter Table of Contents MN-CDM-425...
Page 23: Preface
PREFACE About this Manual This manual provides installation and operation information for the Comtech EF Data CDM-425 Advanced Satellite Modem. This is a document intended for the persons responsible for the operation and maintenance of the CDM-425 Advanced Satellite Modem.
Page 24: Recommended Standard Designations
The CDM-425 Advanced Satellite Modem is designed for connection to a power system that has separate ground, line and neutral conductors. The equipment is not designed for connection to a power system that has no direct connection to ground.
Page 25: Electrical Installation
The installation and connection to the line supply must be made in compliance to local or national wiring codes and regulations. The CDM-425 Advanced Satellite Modem is shipped with a line inlet cable suitable for use in the country of operation. If it is necessary to replace this cable, ensure the replacement has an equivalent specification.
Page 26: Operating Environment
CDM-425 Advanced Satellite Modem Revision Operating Environment CAUTION – DO NOT OPERATE THE UNIT IN ANY OF THESE EXTREME OPERATING CONDITIONS: • AMBIENT TEMPERATURES LESS THAN 0°C (32°F) OR MORE THAN 50°C (122°F). (MAXIMUM STORAGE TEMPERATURE ALLOWED IS -25°C (-13°F) TO 85°C (185°F)).
Page 27: European Union Low Voltage Directive (Lvd) (2006/95/Ec)
In accordance with the European Union Telecommunications Terminal Equipment Directive 91/263/EEC, do not directly connect the unit to the Public Telecommunications Network. CE Mark Comtech EF Data declares that the unit meets the necessary requirements for the CE Mark. Product Support For all product support, please call: +1.240.243.1880...
Page 28: Comtech Ef Data Headquarters
Comtech EF Data Corporation, would affect the reliability or detracts from the performance of any part of the product, or is damaged as the result of use in a way or with equipment that had not been previously approved by Comtech EF Data Corporation.
Page 29: Exclusive Remedies
The buyer shall pass on to any purchaser, lessee, or other user of Comtech EF Data Corporation’s products, the aforementioned warranty, and shall indemnify and hold harmless Comtech EF Data...
Page 30 CDM-425 Advanced Satellite Modem Revision Notes: Preface xxviii MN-CDM-425...
Page 31: Chapter 1. Introduction
Appendix N. TRANSMIT SPECTRUM FILTERING OPTIONS Figure 1-1. CDM-425 Advanced Satellite Modem The CDM-425 Advanced Satellite Modem (Figure 1-1) is intended for closed network applications. It is backwards compatible with the CDM-625 and CDM-625A in VersaFEC modes. It is also backwards compatible with the CDM-625A in VersaFEC-2 modes.
Page 32 CDM-425 Advanced Satellite Modem Revision 0 • It supports an entirely new family of waveforms – VersaFEC and VersaFEC-2® that are optimized for both ACM and CCM operations. A total of 92 Modcods are offered, providing a toolbox that permits a user to optimize power efficiency, spectral efficiency, latency, or a combination of all three.
Page 33: Functional Description
CDM-425 Advanced Satellite Modem Revision 0 Functional Description The CDM-425 Advanced Satellite Modem has two fundamentally different types of interface - IF and data: • The IF interface provides a bidirectional link with the satellite via the uplink and downlink equipment.
Page 34: Features
Firmware downloads are available via the Internet from Comtech EF Data’s Web site, via e-mail, or on CD, and can be transferred from an external client PC once connectivity has been established with the modem.
Page 35: Standard Data Interfaces
1.3.5 Standard Data Interfaces Chapter 3. REAR PANEL CONNECTORS PINOUTS The CDM-425 Advanced Satellite Modem includes a universal data interface that eliminates the need to exchange interface cards for different applications. The interfaces offered, as standard, include: • RS-422 (EIA530) DCE (at rates up to 14 Mbps) •...
Page 36: Optional Hardware And Accessories
Table 1-1 identifies the available hardware options and accessories that can be factory-installed at the time of ordering or user-installed in the field. Refer to the specified manual section for further information or details. Contact Comtech EF Data Product Support to purchase any of these products.
Page 37: Fully Accessible System Topology (Fast)
If you wish to upgrade the functionality of a unit at a later date, Comtech EF Data provides Fully Accessible System Topology (FAST), which permits the purchase and activation of options through special authorization codes.
Page 38 CDM-425 Advanced Satellite Modem Revision 0 Installation Option Description and Comments Method Symbol rate 37 ksps to 300 ksps BASE VersaFEC Adaptive Coding Symbol rate 37 ksps to 1200 ksps FAST and Modulation (ACM) Symbol rate 37 ksps to 4100 ksps...
Page 39: Supporting Hardware And Software
(BUC) using either the front panel display and keypad or any of its remote control interfaces. Additionally, Comtech EF Data provides for an "Advanced FSK" for use with its LPOD BUCs, re- using the existing FSK channel to pass additional "proprietary" commands to expand front panel user control.
Page 40: Physical Features
CDM-425 Advanced Satellite Modem Revision 0 1.3.9 Physical Features 1.3.9.1 Dimensional Envelope All dimensions are in inches. Dimensions shown in parentheses are in metric units (mm). Figure 1-2. Dimensional Envelope Introduction 1–10 MN-CDM-425...
Page 41: Front Panel Features
CDM-425 Advanced Satellite Modem Revision 0 1.3.9.2 Front Panel Features • Chapter 2. INSTALLATION • Chapter 6. FRONT PANEL OPERATION Figure 1-3. Front Panel Features Table 1-3. Front Panel Descriptions and Functions Feature Description Function Sect. Light Emitting 6.1.1 Diode (LED) The LEDs indicate, in a summary fashion, the status of the modem.
Page 42: Rear Panel Features
Figure 1-4. Rear Panel View – AC Connection Figure 1-5. Rear Panel View – DC Connection Figure 1-4 and Figure 1-5 shows the rear panel of the modem. External cables are attached to connectors on the rear panel of the CDM-425 Advanced Satellite Modem. Introduction 1–12...
Page 43: Table 1-4. Rear Panel Connectors And Functions
CDM-425 Advanced Satellite Modem Revision 0 Table 1-4. Rear Panel Connectors and Functions Connection Group Name Connector Type Function (Chapter Sect.) BNC female (70/140MHz band) IF Input Type ’N’ female (L-Band) (Sect. 3.2.1) BNC female (70/140MHz band) IF Output Type ’N’ female (L-Band) Data Interface 25-pin Type ‘D’...
Page 44: Summary Of Specifications
CDM-425 Advanced Satellite Modem Revision 0 Summary of Specifications 1.4.1 Modulator Modulation BPSK, QPSK, 8-QAM, , 8-ARY, 16-QAM, 16-ARY, and 32-ARY Symbol rate range 18 ksps to 12.5 Msps Data rate range 18 kbps - 25 Mbps. See Section 1.4.7 Operating frequency 50 - 180 MHz (BNC connector) and 950 - 2250 MHz (Type ‘N’...
Page 45 CDM-425 Advanced Satellite Modem Revision 0 VersaFEC Codec: Rate 0.488 BPSK (also 0.493 BPSK Ultra-Low-Latency) Rate 0.533, 0.631, 0.706, 0.803 QPSK (0.493, 0.654, 0.734 Ultra-Low-Latency) Rate 0.642, 0.711, 0.780 8-QAM (also 0.576 8-QAM Extended CCM) Rate 0.731, 0.780, 0.829, 0.853 16-QAM (also 0.644 16-QAM Extended CCM) VersaFEC-2 Long-Block Codec: Rate 0.489 BPSK...
Page 46 CDM-425 Advanced Satellite Modem Revision 0 Output power 950-2250 MHz band: 0 to -40 dBm, 0.1 dB steps - manual mode. Also see AUPC section. 50-180 MHz band: 0 to -25 dBm, 0.1 dB steps - manual mode. Also see AUPC section.
Page 47 CDM-425 Advanced Satellite Modem Revision 0 BUC Supply Voltage • Standard unit has no BUC supply. • Optional BUC Supply: 24VDC, 4.17 Amps maximum, 100W 48VDC, 3.125 Amps maximum, 150W @ 50° C (180 watts @ 30° C) Supplied through Tx IF center conductor and selectable ON/OFF via M&C control.
Page 48 CDM-425 Advanced Satellite Modem Revision 0 Figure 1-7. Transmit Power Spectral Density TX Alpha 0.25 and 0.35 Introduction 1–18 MN-CDM-425...
Page 49: Demodulator
CDM-425 Advanced Satellite Modem Revision 0 1.4.2 Demodulator Note: Data rate range, operating modes, descrambling, input impedance/return loss etc, as per Sect. 1.4.1 Modulator. Input power range, desired 950-2250 MHz band: carrier -130 + 10 (symbol rate) to -80 + 10...
Page 50 CDM-425 Advanced Satellite Modem Revision 0 LNB Current Alarm Programmable Min/Max current alarms. Plesiochronous/ Selectable size of 64 to 262,144 bits, in 16-bit steps (With added limitations for G.704 frame boundaries). Doppler Buffer Size selection is displayed in bytes and milliseconds.
Page 51 CDM-425 Advanced Satellite Modem Revision 0 VersaFEC CODEC BER Rate 0.488 BPSK BER=10 2.4 dB (2.1 dB) (With two adjacent BER=10 2.7 dB (2.4 dB) carriers, each 7 dB higher than the desired carrier) VersaFEC CODEC BER For BER=10 Rate – Guaranteed Eb/No (typical value in parentheses) QPSK Rate 0.533 QPSK...
Page 52 CDM-425 Advanced Satellite Modem Revision 0 VersaFEC-2 Long Block Rate 0.489 QPSK Rate 0.537 QPSK Rate 0.586 QPSK Rate 0.611 QPSK CODEC BER BER=10 1.7 dB (1.4 dB) 1.8 dB (1.5 dB) 2.0 dB (1.7 dB) 2.1 dB (1.8 dB)
Page 53 CDM-425 Advanced Satellite Modem Revision 0 (With two adjacent Rate 0.757 32-ARY Rate 0.782 32- Rate 0.801 32-ARY Rate 0.831 32- carriers, each 7 dB higher than the desired BER=10 8.0 dB (7.7 dB) 8.8 dB (8.5 dB) carrier) 8.4 dB (8.1 dB) 9.1 dB (8.8 dB)
Page 54 CDM-425 Advanced Satellite Modem Revision 0 (With two adjacent Rate 0.684 16-ARY Rate 0.708 16- Rate 0.733 16-ARY Rate 0.757 16- carriers, each 7 dB higher than the desired BER=10 5.7 dB (5.4 dB) 6.2 dB (5.9 dB) carrier) 6.1 dB (5.8 dB) 6.7 dB (6.4 dB)
Page 55: Figure 1-8. Rx Carrier Level Vs. Symbol Rate - L-Band (950-2250 Mhz)
CDM-425 Advanced Satellite Modem Revision 0 Maximum Minimum 1000 10000 100000 Symbol Rate in ksps Figure 1-8. Rx Carrier Level vs. Symbol Rate – L-Band (950-2250 MHz) Maximum Minimum 1000 10000 100000 Symbol Rate in ksps Figure 1-9. Rx Carrier Level vs. Symbol Rate – IF Band (50-180 MHz) Introduction 1–25...
Page 56: Data Interfaces
CDM-425 Advanced Satellite Modem Revision 0 1.4.3 Data Interfaces Primary Data RS-422/EIA-530 DCE (Rates up to 14 Mbps) 25-pin D-sub (female) (also supports X.21 DCE & DTE up to 2.048 Mbps) V.35 DCE (Rates up to 14 Mbps) G.703 (Tx In, Drop Out, 9-pin D-sub (female) 1.544 Mbps T1 (Balanced 100 Ω)
Page 57: Doubletalk
CDM-425 Advanced Satellite Modem Revision 0 ® ® 1.4.5 DoubleTalk Carrier- in-Carrier (CnC) Requires the two links to share a common carrier frequency (Outbound and Inbound Operating Mode symbol rates do not have to be equal) Power Spectral Density Ratio BSPK/QPSK/8-QAM: –7 dB to +11 dB (ratio of power spectral density, outbound interferer...
Page 58: Data Rate Ranges
CDM-425 Advanced Satellite Modem Revision 0 1.4.6 Data Rate Ranges VersaFEC (Any Mode) Lower Limit (kbps) Upper Limit (kbps) VersaFEC BPSK Rate 0.488 18.0 5700.0 VersaFEC QPSK Rate 0.533 20.0 10000.0 VersaFEC QPSK Rate 0.631 23.0 10000.0 VersaFEC QPSK Rate 0.706 26.0...
Page 59: Versafec Adaptive Coding And Modulation (Acm)
CDM-425 Advanced Satellite Modem Revision 0 1.4.7 VersaFEC Adaptive Coding and Modulation (ACM) 1.4.7.1 VersaFEC ACM Adaptive Coding and Modulation, using BPSK, QPSK, 8-QAM , 16-QAM and System type VersaFEC short-block LDPC coding – a total of 12 ModCods Symbol Rate Range...
Page 60: Table 1-5. Versafec Modcod Set
CDM-425 Advanced Satellite Modem Revision 0 Table 1-5. VersaFEC ModCod Set Typical Min. Data Max. Data Spectral Eb/No, for Rate, Rate, ModCod Modulation Code Rate efficiency, BER = 5 x 10 ACM Mode ACM Mode bps/Hz (kbps) (Mbps) (dB) BPSK 0.488...
Page 61: Versafec-2 Acm
CDM-425 Advanced Satellite Modem Revision 0 1.4.7.2 VersaFEC-2 ACM Adaptive Coding and Modulation, using BPSK, QPSK, 8-ARY, 16-ARY, 32-ARY and System type VersaFEC-2 Short-block and Long Block LDPC coding - total of 74 ModCods Symbol Rate Range 37 ksps to 12.5 Msps (Long)
Page 62: Table 1-6. The Versafec-2 Modcod Set - Long Block
CDM-425 Advanced Satellite Modem Revision 0 Table 1-6. The VersaFEC-2 ModCod Set – Long Block Typical * Min. Max. Latency Min Sym Max Sym Es/No Spectral Block Code Data Rate, Data Rate, Rate, ACM Rate, ACM ModCod Modulation efficiency, size,...
Page 63: Table 1-7. The Versafec-2 Modcod Set - Short Block
CDM-425 Advanced Satellite Modem Revision 0 Table 1-7. The VersaFEC-2 ModCod Set – Short Block Typical * Min. Max. Latency Min Sym Max Sym Es/No Spectral Block Code Data Rate, Data Rate, Rate, ACM Rate, ACM ModCod Modulation efficiency, size,...
Page 64: Miscellaneous
CDM-425 Advanced Satellite Modem Revision 0 1.4.8 Miscellaneous Front Panel Tactile keypad, 6 keys (up, down, left, right, ENTER, CLEAR) Vacuum Fluorescent Display (blue) – two lines @ 40 characters/line Loopbacks Internal IF loopback, RF loopback, digital loopback, and inward/outward loopback...
Page 65: Chapter 2. Installation
CDM-425 Advanced Satellite Modem Revision 0 Chapter 2. INSTALLATION Unpack and Inspect the Shipment Figure 2-1. Unpack and Inspect the Shipment Installation 2–1 MN-CDM-425...
Page 66: Modem - Rack Enclosure Installation
CDM-425 Advanced Satellite Modem Revision 0 The CDM-425 Advanced Satellite Modem, its optional Installation and Operation Manual (otherwise available online at http://www.comtechefdata.com), and its power cord were packaged and shipped in a reusable cardboard carton containing protective foam spacing. CAUTION – THIS EQUIPMENT CONTAINS PARTS AND ASSEMBLIES SENSITIVE TO DAMAGE BY ELECTROSTATIC DISCHARGE (ESD).
Page 67 Product Support. • The CDM-425 CANNOT have rack slides mounted to the sides of the chassis. Cooling fans and exhaust vents are provided here – air flow must not be impeded. Comtech EF Data recommends that an alternate method of support is provided within the rack, such as standard rack shelves or the optional Rear-Mounting Support Bracket Kit.
Page 68: Figure 2-2. Modem - Rack Enclosure Installation
CDM-425 Advanced Satellite Modem Revision 0 Feature Description Custom Rack Enclosure CDM-425 Advanced Satellite Modem Standard Rack Shelving Rack Enclosure Threaded Front Mounting Rail (typical) Modem Front Panel User-supplied Screws Figure 2-2. Modem - Rack Enclosure Installation Installation 2–4 MN-CDM-425...
Page 69: Optional Rear-Mounting Support Brackets Kits Installation
CDM-425 Advanced Satellite Modem Revision 0 2.2.1 Optional Rear-Mounting Support Brackets Kits Installation Feature Description Back of modem Rack Enclosure Threaded Rear Mounting Rail (typical) Kit / Quantity Item CEFD P/N Description KT/6228-2 KT/6228-3 HW/10-32SHLDR Shoulder Screw, #10 HW/10-32FLT Flat Washer, #10...
Page 70: Modem Configuration
TEST: Mode → IF↓ (IF LOOP).The demod should synchronize, and the Rx TRAFFIC LED should illuminate GREEN. If the modem does not pass this test, contact Comtech EF Data Product Support for further assistance. See Chapter 6. FRONT PANEL OPERATION – Sect.
Page 71: Connect The External Cables
Verify the correct operation via the Internal IF Loop test, then use the front panel keypad to finalize your configuration as needed. Connect all external cables. If difficulties occur, contact Comtech EF Data Product Support for further assistance. Installation 2–7...
Page 72 CDM-425 Advanced Satellite Modem Revision 0 BLANK PAGE Installation 2–8 MN-CDM-425...
Page 73: Chapter 3. Rear Panel Connectors And Pinouts
PINOUTS Cabling Connection Types The CDM-425 Advanced Satellite Modem uses a number of different cables. Each cable type is typically dedicated to a specific mode of operation types – see Section 3.2. 1. Not all of these operational interface types may be available.
Page 74: Type 'Bnc
CDM-425 Advanced Satellite Modem Revision 0 The types of coaxial cables used by Comtech EF Data are ‘BNC’, ‘TNC’, ‘N’, ‘F’, and ‘SMA’. Coaxial cables (plugs) and their mating connectors (jacks/sockets) are available in two coupling styles: Bayonet or Threaded.
Page 75: Type 'Sma' (Subminiature Version 'A')
CDM-425 Advanced Satellite Modem Revision 0 3.1.1.5 Type ‘SMA’ (Subminiature Version ‘A’) Type ‘SMA’ connectors feature a Threaded Coupling design similar to Type ‘TNC’, Type ‘N’, and Type ‘F’ connectors. 3.1.2 D-Subminiature Cable Connections Example Type ‘D’ Connection Type Chassis Receptacles:...
Page 76: 3.1.3 Rj-45, Rj-48 Cable Connections
CDM-425 Advanced Satellite Modem Revision 0 3.1.3 RJ-45, RJ-48 Cable Connections The plug for an RJ-45 or RJ-48 cable features a flexible tab. The RJ-45 or RJ-48 jack features a mating slot. This design configuration assures proper installation and pin orientation.
Page 77: Table 3-1. Rear Panel Connections
CDM-425 Advanced Satellite Modem Revision 0 Table 3-1. Rear Panel Connections Connector Name Connector Type Function Group (Sect) BNC female (70/140MHz band) IF Input Sect. 3.2.1 Type ’N’ female (L-Band) BNC female (70/140MHz band) IF Output Type ’N’ female (L-Band)
Page 78: If Connection Group
CDM-425 Advanced Satellite Modem Revision 0 3.2.1 IF Connection Group WARNING! THERE MAY BE DC VOLTAGES, UP TO A MAXIMUM OF 48 VOLTS, PRESENT ON THE TYPE ‘N’ RX AND TX IF CONNECTORS. 3.2.1.1 Rx IF Connectors Connector Type Description Direction Type ‘N’...
Page 79 Certain pins have Direct Current (DC) voltages present that may damage equipment other than a Comtech EF Data redundancy switch. For X.21 operation, use the EIA-422 pins, but ignore Receive Clock if the Modem is Data Terminal Equipment (DTE), and ignore Transmit clocks if the Modem is Data Circtui-termination Equipment (DCE).
Page 80: G.703 Connectors
CDM-425 Advanced Satellite Modem Revision 0 3.2.2.2 G.703 Connectors 3.2.2.2.1 Balanced G.703 (DB-9F) The Balanced G.703 connector is a 9-pin Type ‘D’ female connector. It is used for single port G.703, D&I or D&I++. When used with Quad E1 operations, this connector serves Ports 1 and 2 of the Quad E1 interface.
Page 81: Aux G.703 (Db-9F)
If all four ports of Quad E1 are needed, the user will need to obtain a quantity of (2X) of any adapter option. For Quad E1 operation, optional Comtech EF Data cabling accessories may be purchased from Comtech EF Data to adapt the Balanced G.703 or Auxiliary G.703 connectors as follows: Table 3-5.
Page 82: Table 3-6. Ca-0000163 Connector Pinouts
CDM-425 Advanced Satellite Modem Revision 0 3.2.2.2.3.1 CA-0000163 Adapter Cable Figure 3-5. CA-0000163 Adapter Cable (DB-9M  (2X) DB-15F) Table 3-6. CA-0000163 Connector Pinouts Table ordered by Signal Function Connector Twisted Signal Function Pair Port 1 or 3 Tx In (+) ––...
Page 83: Table 3-7. Ca-0000164 Connector Pinouts
CDM-425 Advanced Satellite Modem Revision 0 3.2.2.2.3.2 CA-0000164 Adapter Cable Figure 3-6. CA-0000164 Adapter Cable (DB-9M  (2X) RJ-48F) Table 3-7. CA-0000164 Connector Pinouts Table ordered by Signal Function Connector Twisted Signal Function Pair Port 1 or 3 Tx In (+) ––...
Page 84: Table 3-8. Quad E1 Balanced/Unbalanced Adapter Kits
CDM-425 Advanced Satellite Modem Revision 0 3.2.2.2.3.3 KT-0000122/KT-0020570 Quad E1 Balanced/Unbalanced Adapter Cable Kits Figure 3-7. Quad E1 Balanced/Unbalanced Adapter Cable Kits Table 3-8. Quad E1 Balanced/Unbalanced Adapter Kits Kit / Quantity CEFD Part Description KT-0000122 KT-0020570 –– CA-0000347 Y-Cable Assembly, 6”, DB-9M  2X RJ-48 Male (See Table 3-9) ––...
Page 85: Unbal G.703 / Insert Data Out (Ido), Drop Data In (Ddi)
CDM-425 Advanced Satellite Modem Revision 0 3.2.2.2.4 Unbal G.703 / Insert Data Out (IDO), Drop Data In (DDI) Connector Type Description Direction G.703 Unbalanced Rx (IDO) G.703 Unbalanced Tx (DDI) 3.2.2.2.5 G.703 Insert Data In (IDI), Drop Data Out (DDO)
Page 86: Utility Connections Group
CDM-425 Advanced Satellite Modem Revision 0 3.2.3 Utility Connections Group 3.2.3.1 Remote Control (DB-9M) The Remote Control interface is a 9-pin Type ‘D’ male connector. It is intended for connection to an M&C computer or terminal device, and is user selectable for either EIA-232 or EIA-485.
Page 87: Alarms (Db-15M)
CDM-425 Advanced Satellite Modem Revision 0 3.2.3.2 Alarms (DB-15M) Unit alarms are provided on this 15-pin Type ‘D’ male connector. Table 3-11. Alarm Interface Connector Pinouts (L>R) Name Signal Function Pin # Ground EXT-OFF EXT Carrier OFF AGC Voltage (Rx signal level, 0 to 10 Volts)
Page 88: Pre-Mapped Symbol Interface (Pmsi) Connector (Db-9F)
CDM-425 Advanced Satellite Modem Revision 0 3.2.3.3 Pre-Mapped Symbol Interface (PMSI) Connector (DB-9F) The Pre-Mapped Symbol Interface (PMSI) is a 9-pin Type ‘D’ female connector. The PMSI is an EIA-485 multidrop bus system, used in tandem with Carrier-in-Carrier (CnC), where one device transmits, and all other devices on the multidrop bus are configured to receive.
Page 89: 1:1 Control (Db-9F)
CDM-425 Advanced Satellite Modem Revision 0 3.2.3.4 1:1 Control (DB-9F) The 1:1 Control connector is intended only for connection to a CRS-170A or CRS-180 Redundancy Switch. The 1:1 Control connector is a 9-pin Type ‘D’ female connector. Table 3-13. 1:1 Control Interface Connector Pinouts (R>L)
Page 90: Ground And Power Connections
CDM-425 Advanced Satellite Modem Revision 0 Ground and Power Connections 3.3.1 Chassis Ground Interface CAUTION – PROPER GROUNDING PROTECTION IS REQUIRED. The equipment must be connected to the protective earth connection at all times. It is therefore imperative that the unit is properly grounded, using the ground stud provided on the unit rear panel, during installation, configuration, and operation.
Page 91: Standard 100V/240V Alternating Current (Ac) Power Interface
CDM-425 Advanced Satellite Modem Revision 0 3.3.2 Standard 100V/240V Alternating Current (AC) Power Interface Figure 3-10. AC Chassis Power Interface (CEFD P/N PL/12587-1) Table 3-14. AC Chassis Power Interface Features and Description Feature Description On / Off Switch Press-fit Fuse Holder IEC-60320 Type C14 Three-prong Connector Table 3-15.
Page 92: Ac Operation - Accessories
CDM-425 Advanced Satellite Modem Revision 0 3.3.2.1 AC Operation – Accessories Contact Comtech EF Data Product Support to purchase any of these available accessories: Table 3-16. AC Operation Accessories CEFD P/N Description AC to 24V DC Conversion Kit AC to 48V DC Conversion Kit...
Page 93: Ac Operation - Fuse Replacement
3.3.2.3 AC Operation – Fuse Replacement For AC operation, the CDM-425 Advanced Satellite Modem uses two common 5mm x 20mm Slow-blow fuses – one each for line and neutral connections. The fuses are contained within a fuse holder that is press-fit into the body of the IEC power module (located on the rear panel, Figure 3-12).
Page 94: Optional 48V Direct Current (Dc) Power Interface
CDM-425 Advanced Satellite Modem Revision 0 3.3.3 Optional 48V Direct Current (DC) Power Interface Figure 3-13. DC Chassis Power Interface (Optional) (CEFD P/N PL-0021327) Table 3-17. DC Chassis Power Interface Features and Description Feature Description On / Off Switch Power Terminal Block Screw-in Fuse Holders / Receptacles Table 3-18.
Page 95: Dc Operation - Accessories (Optional)
CDM-425 Advanced Satellite Modem Revision 0 3.3.3.1 DC Operation – Accessories (Optional) Contact Comtech EF Data Product Support to purchase any of these available accessories: Table 3-19. DC Operation Accessories (Optional) CEFD P/N Description PS-0020607 DC 48V 70W Power Supply...
Page 96: Dc Operation - Fuse Replacement (Optional)
3.3.3.3 DC Operation – Fuse Replacement (Optional) For DC operation the CDM-425 requires two different fuses that are contained within the individual screw-in receptacles below the terminal block (located on the rear panel, Figure 3-15). Figure 3-15. DC Chassis Fuse Replacement (Optional)
Page 97: Chapter 4. Update Firmware
If a firmware update is needed, once Ethernet connectivity has been established with the unit, you can download the update archive file from the Comtech EF Data Web site (www.comtechefdata.com), or obtain it through e-mail from Comtech EF Data Product Support.
Page 98: About Firmware Files, Naming, Versions, And Archive Formats
Contact Comtech EF Data Product Support to obtain the firmware update for the CDM-425 IP Packet Processor Module with AES Encryption. The firmware download files are available from Comtech EF Data in two archive file formats: *.exe (self extracting) and *.zip (compressed). Some firewalls will not allow the downloading of *.exe files;...
Page 99: Ethernet Ftp Upload Procedure
Revision 0 Ethernet FTP Upload Procedure 4.3.1 Getting Started: Prepare for the Firmware Download 1. First, identify the CDM-425 Advanced Satellite Modem firmware (number/revision letter/version number) and the assigned Ethernet Traffic/Management IP Address. User-supplied items needed: • A Microsoft Windows-based PC, equipped with available serial and Ethernet ports;...
Page 100: Figure 4-2. Modem On/Off Switch
192.168.001.002/24 () • Using the CDM-425 HTTP Interface (via the User PC Web Browser) – this assumes that you have already noted the Traffic/Management IP Address, which was previously required to open the CDM-425 HTTP Interface: Firmware Info – Use the ‘Admin | Firmware | Base Modem’ and, if needed, the ‘Admin | Firmware | Packet Processor’...
Page 101 CDM-425 Advanced Satellite Modem Revision 0 Figure 4-3. Admin | Firmware | Pages • Using the CDM-425 Serial Remote Interface (via the User PC / terminal emulator program): Firmware Info – Use the <0/SWR? (condensed) or <0/FRW? (detailed) remote query.
Page 102 CDM-425 Advanced Satellite Modem Revision 0 7. Next, create a temporary folder (subdirectory) on the User PC for the firmware archive download. There are several ways to create a temporary folder on a Windows-based PC: • These examples use drive letter “c:”. You may use any valid, writable drive letter.
Page 103 CDM-425 Advanced Satellite Modem Revision 0 • Use the ‘Run’ and ‘Browse’ windows to create and rename the temporary folder. Select [Start] on the Windows taskbar, and then click the Run... icon. This opens the ‘Run’ window. Click [Browse] in the ‘Run’ window. This opens the ’Browse’ window.
Page 104: Download And Extract The Firmware Update
On the Flash & Software Update Files page – select the (Select a Product Line) Satellite Modems hyperlink. e. On the Satellite Modems product page – select the CDM-425 product hyperlink. Select the appropriate firmware archive EXE or ZIP file download hyperlink (i.e., the CDM-425 Base Modem or the CDM-425 with IP Packet Processor without AES Encryption;...
Page 105 CDM-425 Advanced Satellite Modem Revision 0 g. Download the archive file to the temporary folder. • Once the EXE or ZIP hyperlink is selected, the ‘File Download’ window opens and prompts selection of [Open] or [Save]: Click [Open] to turn over file extraction to the user-supplied utility program.
Page 106: Perform The Ethernet Ftp Upload Procedure
Interface ‘Admin | Firmware | Base Modem’ and ‘Configuration | LAN | IP’ pages, respectively. • The latest firmware files have been downloaded or otherwise received from Comtech EF Data and are available on the User PC in an accessible temporary folder. Updating Firmware 4–10...
Page 107 Use Command-line: Type “ping xxx.xxx.xxx.xxx” at the Command-line prompt (where ‘xxx.xxx.xxx.xxx’ is the unit Ethernet Traffic/Management IP Address). • You may alternately use the CDM-425 Advanced Satellite Modem HTTP Interface ‘Admin | Utilities’ page, as shown in this example: Figure 4-10. Ping Command Line For either method, the response should confirm whether the unit is properly connected and communicating.
Page 108 CDM-425 Advanced Satellite Modem Revision 0 2. Use Command-line to transfer (FTP) the files from the User PC to the CDM-425 Advanced Satellite Modem: a. Type "ftp xxx.xxx.xxx.xxx" (where ‘xxx.xxx.xxx.xxx’ is the modem Ethernet Traffic/Management IP Address). b. If the optional IP Packet Processor is installed and enabled, enter the User Name and Password when prompted.
Page 109 Base Modem’ page, or issue the Serial Remote Interface <0/SWR? or <0/FRW? query, as shown previously, to verify that the PC-to-Modem FTP file transfer was successful. If you are a Base Modem user, the CDM-425 Advanced Satellite Modem is now operating with its latest firmware and you may skip to Step 6.
Page 110 CDM-425 Advanced Satellite Modem Revision 0 g. Press the front panel CLEAR key as prompted. h. Type "bye" to terminate the FTP session, and then close the Command-line window. 5. Use the modem front panel menus, the modem HTTP Interface ‘Admin | Firmware | Packet Processor’...
Page 111 CDM-425 Advanced Satellite Modem Revision 0 Figure 4-11. Firmware Verification on Admin Page 7. Reboot the modem. You may perform a ‘soft reboot’ or a ‘hard reboot’ as follows: • Using the modem HTTP Interface ‘Admin| Reboot’ page, click [Reboot Now].
Page 112 Figure 4-12. Firmare Verification on Home Page The CDM-425 Advanced Satellite Modem is now operating with its latest firmware. The firmware update process is now complete.
Page 113: Chapter 5. Fast Activation Procedure
If you wish to upgrade the functionality of a unit at a later date, Comtech EF Data provides Fully Accessible System Topology (FAST), which permits the purchase and activation of options through special authorization codes.
Page 114: Fast Activation Procedure
FAST Activation Using the Front Panel Chapter 6. FRONT PANEL OPERATION 1. Before you contact Comtech EF Data Product Support to order FAST feature upgrades, you must retrieve the modem’s motherboard serial number: A. From the front panel main menu, SELECT: FAST, and then press ENTER.
Page 115 C. Obtain the invoice, the register-specific 20-digit FAST Access Code(s), and the FAST option activation instructions. When a FAST Access Code is obtained from Comtech EF Data, it will be for a specific option register. The FAST options are linked to two option registers: •...
Page 116: Fast Activation Using The Http (Web Server) Interface
88888888888888888888 then [ENTER]() Repeat the FAST Access Code entry procedure. Should the code entry error persist, contact Comtech EF Data Product Support for further assistance. 5.2.2 FAST Activation Using the HTTP (Web Server) Interface Chapter 7. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT Figure 5-1.
Page 117 CDM-425 Advanced Satellite Modem Revision 0 1. Before you contact Comtech EF Data Product Support to order FAST feature upgrades, you must retrieve the modem’s motherboard serial number. Use the front panel SELECT: FAST menu, as explained in Sect. 5.2.1 Step 1, to obtain and record the modem’s motherboard serial number.
Page 118 CDM-425 Advanced Satellite Modem Revision 0 Notes: FAST Activation Procedure 5–6 MN-CDM-425...
Page 119: Chapter 6. Front Panel Operation
CDM-425 Advanced Satellite Modem Revision 0 Chapter 6. FRONT PANEL OPERATION Overview Figure 6-1. Front Panel Features Table 6-1. Front Panel Descriptions and Functions See Chapter Feature Description Function Section... Light Emitting Diode (LED) The LEDs indicate, in a summary fashion, the status of the modem.
Page 120: Led Indicators
CDM-425 Advanced Satellite Modem Revision 0 6.1.1 LED Indicators In general, the Alarm relay state reflects the state of the Front Panel LEDs. For example, if the Unit Status LED is red, the Unit Alarm relay is active, etc. The sole exception is the Transmit Traffic relay – it does not reflect the state of the Tx carrier;...
Page 121 CDM-425 Advanced Satellite Modem Revision 0 State Function CnC-APC or IP-ACM or V2-ACM or EDMAC mode is active, and distant-end demod Green is locked DISTANT CnC-APC or IP-ACM or V2-ACM or EDMAC mode is active, and distant-end demod Orange is not locked...
Page 122: Keypad
6.1.3 Vacuum Fluorescent Display (VFD) The CDM-425 features a Vacuum Fluorescent Display (VFD). The VFD is an active display showing two lines of 40 characters each. It produces a blue light with adjustable brightness.
Page 123: Opening Screen
The front panel displays provide the means to fully monitor and control modem operation. Once you turn on the power, you will see the read-only opening screen: Comtech CDM-425 Advanced Satellite Modem Ver1.1.1 This screen identifies the modem model, its installed firmware version, and information about installed hardware options.
Page 124: Select: (Main) Menu
Utility FAST () Figure 6-2 shows the hierarchal structure of the CDM-425 principle menu tree from the SELECT: menu on down. Press ENTER or CLEAR to immediately access the SELECT: menu screen from the opening screen. From any nested menu, press CLEAR repeatedly until this screen reappears.
Page 125 CDM-425 Advanced Satellite Modem Revision 0 Figure 6-2. CDM-425 Principle Menu Tree (FW Ver. 1.1.1) Front Panel Operation 6–7 MN-CDM-425...
Page 126: Select: Config (Configuration) Menu Branch
CDM-425 Advanced Satellite Modem Revision 0 6.2.1 SELECT: CONFIG (Configuration) Menu Branch CONFIG: All Mode Tx Clocks EDMAC Misc Mask Remote IP () CONFIG: All Mode Tx Clocks D&I EDMAC Misc Mask Remote IP () Use the ◄ ►arrow keys to select a submenu. Press ENTER. Valid selections are: Submenu Sect.
Page 127: Config: All
CDM-425 Advanced Satellite Modem Revision 0 Submenu Sect. Function Use to configure various IP parameters, including IP address, gateway, MAC 6.2.1.13 addresses, VLAN, and QoS. You may always view the front panel operations and monitor the modem over the remote control bus (i.e., queries only); however, only one method of remote...
Page 128: Config: Mode
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.2 CONFIG: Mode ® Appendix K. V FEC-2 ACM ADAPTIVE CODING ERSA ERSA MODULATION (ACM) OPTION MODE is a key parameter when configuring the modem. To simplify the menu selections, first determine the INTERFACE and FRAMING type for both Transmit and Receive.
Page 129 • G.703 interfaces to enable the modem to transmit or receive fractional parts of a T1 or E1 data stream. D&I++ is a Comtech EF Data proprietary framing – it is a closed- D&I++ (FAST option) • network frame structure similar to D&I, but which permits AUPC and EDMAC.
Page 130: Config: Tx
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.3 CONFIG: Tx Tx-IF Freq Power FEC Mod Data Scrambler (Data 00192.000kbps, 00131.657ksps) () On the top line – Use the ◄ ►arrow keys to select a parameter. Press ENTER. On the bottom line – Read-only Data and Symbol rate information is provided.
Page 131: Config: Tx  Freq (Frequency)
CDM-425 Advanced Satellite Modem Revision 0 Txα (Tx Alpha Filter Rolloff Factor) – Use the ▲▼ arrow keys to select the Txα. Press ENTER. Valid settings are: Txα (Tx Alpha Rollout Factor) (%) Default 0.05, 0.10, 0.15, 0.25 0.35 The Rxα of the corresponding receiver must match the Txα – see Sect.
Page 132: Config: Tx  Power
CDM-425 Advanced Satellite Modem Revision 0 CONFIG: Tx  Power 6.2.1.3.3 Output Power: Mode= Manual (Manual,AUPC) Level=–20.0 dBm () Use the ◄ ►arrow keys to select the Output Power Mode (top line) or to edit the Output Power Level (bottom line). Press ENTER.
Page 133 CDM-425 Advanced Satellite Modem Revision 0 However, with CONFIG: Mode set to IP-ACM or V2-ACM mode, the bottom line appears as follows: Output Power Mode=AUPC (Manual,AUPC) Mode/Range Alarm-Action () Use the ◄ ►arrow keys to select Target-EbNo-Range or Mode/range (when in IP-ACM or V2-ACM mode), or Alarm Action.
Page 134 CDM-425 Advanced Satellite Modem Revision 0 Note that: Setting Function Nom-Pwr (Nominal Power) The output level reverts to the nominal power level set under Manual. Max-Pwr (Maximum Power) The output level changes to the maximum permitted. When in IP-ACM or V2-ACM mode: CONFIG: Tx ...
Page 135: Config: Tx  Fec
CDM-425 Advanced Satellite Modem Revision 0 On the bottom line – Use the ▲▼ arrow keys to select the action that occurs if the remote demodulator is unlocked. Use the ▲▼ arrow keys to select a parameter. Valid settings are:...
Page 136: Config: Tx  Mod (Modulation)
CDM-425 Advanced Satellite Modem Revision 0 CONFIG: Tx  Mod (Modulation) 6.2.1.3.5 Mod=BPSK (B,Q,8QAM,16QAM) () FEC Rate=0.488 (Fixed) Use the ◄ ►arrow keys to select the Mod (modulation type) (top line) or the FEC Rate (bottom line). Press ENTER. Then, use the ▲▼ arrow keys to change that parameter selection. The...
Page 137: Config: Tx  Data
CDM-425 Advanced Satellite Modem Revision 0 When you select VFEC from the CONFIG: Tx > FEC submenu, the options appear as shown: Mod=BPSK (B,Q,8QAM,16QAM) () FEC Rate=0.488 (Fixed) When you select ULL from the CONFIG: Tx > FEC submenu, the options appear as shown:...
Page 138 CDM-425 Advanced Satellite Modem Revision 0 CONFIG: Tx  Tx Data  Tx Data Rate Chapter 3. REAR PANEL CONNECTOR PINOUTS Tx Data Rate = 01544.000 kbps Data Invert=Off Clock Invert=Off () Use the top line to edit the Tx Data Rate. Use the bottom line to configure the Data Inversion or the Clock Inversion features, which provide compatibility with certain older equipment.
Page 139: Config: Tx  Symb (Ip-Acm Or V2-Acm Modes Only)
CDM-425 Advanced Satellite Modem Revision 0 Note that these data rates are read-only in QDI (Quad D&I) mode! The data rate is the sum of the tributary rates for all ports. On the bottom line – You may set either Data Invert or Clock Invert operation by using the ▲▼...
Page 140: Config: Tx  Scrambler
CDM-425 Advanced Satellite Modem Revision 0 CONFIG: Tx  Scrambler 6.2.1.3.8 Tx Scrambler = IESS (Normal,IESS,Off) IESS-315 V.35 Scrambler () Use the ▲▼ arrow keys to select Normal, IESS, or Off. Press ENTER. The modem automatically selects the actual scrambler used for Normal, depending on the exact operating mode: •...
Page 141: Config: Rx
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.4 CONFIG: Rx RxIF Freq FEC Demod Data Descram EbNo (Data 02048.000kbps,02184.533ksps) () On the top line – Use the ◄ ►arrow keys to select a parameter. Press ENTER. On the bottom line – Read-only Data/Symbol rate information is provided.
Page 142 CDM-425 Advanced Satellite Modem Revision 0 Use the ▲▼ arrow keys to edit the setting in 10 kHz increments. Press ENTER. Spectrum Invert – Use the ▲▼ arrow keys to set Spectrum Invert as Off or On. Press ENTER. SPECTRUM INVERT should normally be in the OFF position. Rx spectrum is inverted in the ON position (which is the same as reversing the direction of phase rotation in the demodulator).
Page 143: Config: Rx Freq (Frequency)
CDM-425 Advanced Satellite Modem Revision 0 CONFIG: Rx Freq (Frequency) 6.2.1.4.2 Rx-IF Frequency: 0070.0000 MHz () Edit the Rx-IF Frequency by using the ◄ ►arrow keys to select a digit, and then using the ▲▼ arrow keys to change that digit. Press ENTER. Valid settings are:...
Page 144: Config: Rx  Fec
CDM-425 Advanced Satellite Modem Revision 0 CONFIG: Rx  FEC 6.2.1.4.3 Dec=VFEC (VFEC,ULL,VF2L,VF2S) () Use the ▲▼ arrow keys to select an available Decoder option (shown in parentheses). Press ENTER. Valid selections are: ► VFEC (VersaFEC) ► VF2L (VersaFEC-2 Long Block) ►...
Page 145: Config: Rx  Data
CDM-425 Advanced Satellite Modem Revision 0 When you select VFEC from the CONFIG: Rx > FEC submenu, the options appear as shown: Demod=BPSK (B,Q,8QAM,16QAM) () FEC Rate=0.488 (Fixed) When you select ULL from the CONFIG: Rx > FEC submenu, the options appear as shown:...
Page 146 CDM-425 Advanced Satellite Modem Revision 0 CONFIG: Rx  Data  Rx Data Rate Rx Data Rate = 01544.000 kbps Data Invert=Off Clock Invert=Off () Use the top line to edit the Rx Data Rate. The bottom line permits selection of the Data Inversion or the Clock Inversion features (added for compatibility with certain older equipment).
Page 147: Config: Rx  Symb (Ip-Acm Or V2-Acm Modes Only)
CDM-425 Advanced Satellite Modem Revision 0 CONFIG: Rx  Symb (IP-ACM or V2-ACM Modes Only) 6.2.1.4.6 ® Appendix K. V FEC-2 ACM ADAPTIVE CODING ERSA ERSA MODULATION (ACM) OPTION VersaFEC ACM or VersaFEC-2 ACM modes require the appropriate FAST codes for the maximum operating symbol rate.
Page 148: Config: Rx  Ebno
CDM-425 Advanced Satellite Modem Revision 0 CONFIG: Rx  EbNo 6.2.1.4.8 Receive EbNo Alarm Point = 02.0 dB () Edit the EbNo Alarm Point by using the ◄ ►arrow keys to select a digit, and then using the ▲▼ arrow keys to change that digit. The allowable range is from 00.1 to 16.0 dB. Press ENTER.
Page 149: Config: Clocks
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.5 CONFIG: Clocks Clocking: TxClock Rx-Buffer/Clock Clock-Ext Freq-Ref Int-Ref-Adjust () Use the ◄ ►arrow keys to select a parameter. Press ENTER. CONFIG: Clocks  Tx Clock 6.2.1.5.1 Transmit Clock = Internal(SCT) (Int(SCT),TxTerr(TT),RxLoop, ETTSTRxS) () Use the ▲▼...
Page 150: Config: Clocks  Rx Buffer/Clock
CDM-425 Advanced Satellite Modem Revision 0 CONFIG: Clocks  Rx Buffer/Clock 6.2.1.5.2 Clk=Rx-Sat (Rx-Sat,TxTerr,Int(SCT)) Buffer Size = 00016bytes(00002ms) Center Use the ◄ ►arrow keys to set the Rx Clock (top line) or the Buffer-Size (bottom line). On the top line – To set the Rx Clock, use the ▲▼ arrow keys to select a parameter. Press ENTER.
Page 151: Config: Clocks  Clk-Exten (G.703 Clock Extension)
Function None All G.703 Clock extension modes are disabled. The CDM-425 (operating in a non-G.703 mode) locks its transmit clock timing to an externally TxLock presented G.703 reference signal. The CDM-425 (operating in a non-G.703 mode) synthesizes a G.703 timing reference from the RxEnable Rx satellite signal, regardless of its actual data rate.
Page 152: Config: Clocks  Freq-Ref
(T1,E1-B,E1-U) () When you select TxLock as the mode, the transmit timing of the CDM-425 locks to the timing presented of the interface type selected here. When you select RxEnable as the mode, the CDM-425 generates a timing signal of the interface type selected here.
Page 153: Config: D&I (Drop & Insert)
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.6 CONFIG: D&I (Drop & Insert) Appendix E. CLOCK MODES DROP & INSERT (D&I) Sect. 6.2.1.2 CONFIG: Mode 1. Drop & Insert operation is a FAST option. 2. D&I (Drop & Insert) is not available when you select either ACM mode.
Page 154 CDM-425 Advanced Satellite Modem Revision 0 CONFIG: D&I  Drp-Type or Ins-Type The available Frame Format types for Drop or Insert are: Frame Format (Type) Description T1-D4 T1 D4 Framing T1-ESF T1 Extended Super Frame Framing E1-CCS E1 Common Channel Signaling Framing...
Page 155 CDM-425 Advanced Satellite Modem Revision 0 6.2.1.6.2 CONFIG: Quad D&I (QDI) (QDI, Framed QDI Framing Mode) With QDI or Framed QDI set as the framing mode, the D&I menu branch displays Quad D&I operation as follows: Quad D&I (QDI): (E1s are synchronous)
Page 156 CDM-425 Advanced Satellite Modem Revision 0 Each display is limited to eight channels. The ‘>’ character displays at the top line, right-hand side of the Drop or Insert screen to indicate that there are channels beyond Channel 8 available for selection, up to Channel 31 (as shown by the preceding examples).
Page 157: Config: Acm (Adaptive Coding And Modulation) (Ip-Acm Or V2-Acm Modes Only)6-39
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.7 CONFIG: ACM (Adaptive Coding and Modulation) (IP-ACM or V2-ACM Modes Only) ® Appendix K. V FEC-2 ACM ADAPTIVE CODING ERSA ERSA MODULATION (ACM) OPTION ACM Config: Min/Max-ModCod Unlock-Action Target-SNR-Margin () Use the ◄ ►arrow keys to select a parameter. Press ENTER.
Page 158: Config: Acm  Unlock-Action
CDM-425 Advanced Satellite Modem Revision 0 CONFIG: ACM  Unlock-Action 6.2.1.7.2 If using IP-ACM Mode: When distant-end demod loses lock: Go to min Tx ModCod (Maintain,Min) () Use this submenu to establish the desired action when the remote demod loses lock. This is important, as the ACM system depends on the feedback of the SNR metric from the remote demod to determine the optimum ModCod.
Page 159: Config: Cnc
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.8 CONFIG: CnC Chapter 5. FAST ACTIVATION PROCEDURE For more information about purchasing FAST options: • Sect. 6.2.8 SELECT: FAST menus • Sect. 1.3.10 Fully Accessible System Topology (FAST) Appendix F. DoubleTalk Carrier-in-Carrier OPTION CnC operation requires that you purchase one of several available FAST options to provide capability to a maximum of 25Mbps.
Page 160: Config: Cnc  Config: Cnc  Freq-Offset
CDM-425 Advanced Satellite Modem Revision 0 CONFIG: CnC  CONFIG: CnC  Freq-Offset 6.2.1.8.2 CnC Frequency Offset: (range 1-032) +/-015 kHz () Use this menu to set the maximum expected frequency offset between the outbound interferer and the desired inbound. It normally corresponds to the demod acquisition range.
Page 161: Config: Cnc  Pmsi-Control
To use this mode of operation, you must connect the appropriate cable to the PMSI connector on the rear panel of each modem: • For 1:N multi-drop applications – Use Comtech EF Data cable P/N CA-0000275; • For 1:1 applications – Use Comtech EF Data cable P/N CA-0000276.
Page 162: Config: Edmac
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.9 CONFIG: EDMAC Appendix H. EDMAC CHANNEL Embedded Distant-end Monitor and Control (EDMAC) is a Comtech-proprietary framing that permits communication access to the distant-end modem. Without the proper active framing mode, the menu appears as follows:...
Page 163: 6.2.1.10 Config: Misc
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.10 CONFIG: Misc Misc: G.703-LineCode Warm Up Stats () Use the ◄ ►arrow keys to select a parameter. Press ENTER. 6.2.1.10.1 CONFIG: Misc  G.703-LineCode (Ternary Code) This menu is functional only when the Data Interface Type is G.703.
Page 164: 6.2.1.10.2 Config: Misc  Rts
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.10.2 CONFIG: Misc  RTS This menu is functional only when the Data Interface is set for RS-422 or V.35. RTS/CTS operation: (3 options) Loop, RTS controls Tx-out () Use the ▲▼ arrow keys to set the RTS/CTS control. Press ENTER. Valid selections are:...
Page 165: Config: Misc  Stats (Statistics)
(MEO requires ACM, PaP, and no Cnc) MEO is non-functional when CnC is enabled. CDM-425 Advanced Satellite Modems are configurable for continuous pairing as Primary and non-Primary Modems in an Antenna Handover System when the MEO (Medium Earth Orbit) feature is enabled.
Page 166: 6.2.1.11 Config: Mask
CDM-425 Advanced Satellite Modem Revision 0 CONFIG: Misc  MEO  Enable/Disable  Antenna Handover Antenna Handover: Enabled DPD = 00 Mode = Manual Port = 05501 () Use the ◄ ►arrow keys to navigate to the proper line: On the top line: Use the ◄...
Page 167: 6.2.1.11.1 Config: Mask  Ais
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.11.1 CONFIG: Mask  AIS AIS: Tx-Terr-AIS = Masked (Active,Mask) Rx-Sat-AIS = Active () Use the ◄ ►arrow keys to select Tx-Terr-AIS or Rx-Sat-AIS, and then use the ▲▼ arrow keys to select either as Active or Masked. Press ENTER.
Page 168: 6.2.1.11.4 Config: Mask  Txclk
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.11.4 CONFIG: Mask  TxClk Tx Clock Alarm: = Masked (Active,Masked) (Valid in G.703 & Ext clock modes) () Use the ▲▼ arrow keys to select the Tx Clock Alarm as Active or Masked. Press ENTER.
Page 169: 6.2.1.11.7 Config: Mask  Buc
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.11.7 CONFIG: Mask  BUC Chapter 10. OUTDOOR UNIT (ODU) (TRANSCEIVER, BUC, AND LNB) OPERATION BUC alarm = Active (Active,Mask) Attach to Tx alarm = No (Yes,No)() When L-Band is in use, you may include a BUC in the operating system. You may monitor and control a ‘smart’...
Page 170: Config: Remote (Remote Control)
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.12 CONFIG: Remote (Remote Control) Remote Control=Local (Local,Serial remote,Ethernet) () Use the ▲▼ arrow keys to select Local, Serial remote, or Ethernet. Press ENTER. When you select Local, you are not permitted to reconfigure the modem via Serial Remote or Ethernet, although remote monitoring is permissible.
Page 171: 6.2.1.13.1 Config: Ip  Addresses
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.13.1 CONFIG: IP  Addresses IP Addresses: Gateway Addr/Range () Use the ◄ ►arrow keys to select MAC, Gateway, or Addr/Range. Press ENTER. CONFIG: IP  Addresses  MAC Ethernet MAC Address: 00-06-B0-00-01-06 (read-only) This screen displays the read-only unit MAC address.
Page 172 CDM-425 Advanced Satellite Modem Revision 0 CONFIG: IP  SNMP  Communities SNMP Communities: Read Write () Use the ◄ ►arrow keys to select Read or Write. Press ENTER. CONFIG: IP  SNMP  Communities  Read SNMP Read Community:...
Page 173 CDM-425 Advanced Satellite Modem Revision 0 CONFIG: IP  SNMP  Traps Traps: Community Version IP-Addr#1 IP-Addr#2 () Use the ◄ ►arrow keys to select a parameter. Press ENTER. CONFIG: IP  SNMP  Traps  Community SNMP Traps Community:...
Page 174: 6.2.1.13.3 Config: Ip  Setup
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.13.3 CONFIG: IP  Setup IP Setup: Mode PerPortCnfg DDMgmtPt MAC-Lrng Rad VLAN QoS Stats FrmSize () Use the ◄ ►arrow keys to select a parameter. Press ENTER. 6.2.1.13.3.1 CONFIG: IP  IP Setup: Mode Working Mode: Router Point to Point (ManagedSwitch,R-PtoP, R-MPHub,R-MPRm)()
Page 175 CDM-425 Advanced Satellite Modem Revision 0 6.2.1.13.3.3 CONFIG: IP  Setup: PerPortCnfg Per-Port-Config: Port1 Port2 Port3 Port4 () Use the ◄ ►arrow keys to select Port1 through Port4. Press ENTER. CONFIG: IP  IP Setup: PerPortCnfg  Port# Where # denotes the selected Port:...
Page 176 CDM-425 Advanced Satellite Modem Revision 0 WAN Buffer Notes: What is the WAN Buffer? Wan Buffer is applicable when the optional IP Packet Processor is not installed. It is a special FIFO structure that exists between the IP Packet Processor’s packet encapsulator and the Modulator path.
Page 177 () Use Dedicated Management Port mode in redundancy applications. When a redundant CDM-425 is Offline (Standby), all four of the offline modem’s Ethernet ports are disabled unless you first configure one of the four ports as the “Dedicated Management Port”.
Page 178 CDM-425 Advanced Satellite Modem Revision 0 Local-only mode: • Allows the local modem management access through the assigned Dedicated Management Port. • Does not allow the local modem management access through any other port that is not designated as a Dedicated Management Port.
Page 179 CDM-425 Advanced Satellite Modem Revision 0 6.2.1.13.3.6 CONFIG: IP  IP Setup: Rad (Remote Authentication Dial In User Service) Chapter 7. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT Chapter 8. SERIAL-BASED REMOTE PRODUCT MANAGEMENT Appendix O. RADIUS CLIENT 1. You must first set CONFIG: MODE to IP or IP-ACM in order to use this menu.
Page 180 CDM-425 Advanced Satellite Modem Revision 0 CONFIG: IP  IP Setup: VLAN  PortMode  Port# Where # denotes the selected Port: Port #: Port Mode= Trunk PVID=N/A () Use the ◄ ►arrow keys to select the operation parameter. Then, use the ▲▼ arrow keys to select Trunk or Access: •...
Page 181 CDM-425 Advanced Satellite Modem Revision 0 Your options are as follows: • View, without changing, the behavior attributes assigned to each port under the selected VLAN ID: ACT=NONE (default). • Edit the behavior attributes assigned to each port under the selected VLAN ID.
Page 182 CDM-425 Advanced Satellite Modem Revision 0 CONFIG: IP  IP Setup: VLAN  VLAN-Table  Add-Entry VLAN ID:???? P1:Tagged P2:Tagged P3:Tagged P4:Untagged ADD () Do these steps to add new entries to the VLAN table: 1. Use the ◄ ►arrow keys to select the ???? numerical string following the VLAN ID: parameter.
Page 183 CDM-425 Advanced Satellite Modem Revision 0 You must follow these rules when creating or adding a VLAN table entry: • The VLAN ID (0001-4095) must be unique – it cannot be a duplicate of any previously assigned VLAN ID, including PVIDs in the VLAN ID table.
Page 184 CDM-425 Advanced Satellite Modem Revision 0 6.2.1.13.3.8 CONFIG: IP  IP Setup: QoS Appendix M. QUALITY SERVICE (QoS) QoS functionality depends on whether the optional IP Packet Processor card is either: • Not installed or installed but disabled, or •...
Page 185 CDM-425 Advanced Satellite Modem Revision 0 When you select Port (only) or VLAN&Port, the display updates to include Port Priority on the bottom line: L2 QoS=Port only (Off,VLAN,PT,VLAN&Port) Port Priority: P1:1 P2:2 P3:1 P4:1 () Define Port Priority by using the ◄ ►arrow keys to select the port (P1, P2, P3, or P4), and then using the ▲▼...
Page 186 CDM-425 Advanced Satellite Modem Revision 0 6.2.1.13.3.9 CONFIG: IP  IP Setup: Stats IPstats: Port x () Unicasts: 00000003 00000023 Clr:N This screen displays IP traffic statistics for both the In (Ingress) and Out (Egress) directions. Use the ◄ ►arrow keys to navigate to the proper line, in this order: On the top line –...
Page 187: Config: Ip  Ant (Advanced Network Timing)
CDM-425 Advanced Satellite Modem Revision 0 CONFIG: IP  IP Setup: FrmSize 6.2.1.13.3.10 2048 Ethernet Frame Size: Enabled (Dis/Ena) () Use the ▲▼ arrow keys to set 2048-byte Ethernet packet sizes as Enabled or Disabled. Press ENTER. 6.2.1.13.4 CONFIG: IP  ANT (Advanced Network Timing)
Page 188 CDM-425 Advanced Satellite Modem Revision 0 For Time Zone – Use the ▲▼ arrow keys to set your desired time zone: GMT 00:00 GMT+01:00 GMT+02:00 GMT+03:00 GMT+03:30 GMT+04:00 GMT+04:30 GMT+05:00 GMT+05:30 GMT+05:45 GMT+06:00 GMT+06:30 GMT+07:00 GMT+08:00 GMT+09:00 GMT+09:30 GMT+10:00 GMT+10:30...
Page 189 CDM-425 Advanced Satellite Modem Revision 0 For PTP – Use the ▲▼ arrow keys to select PTP as Enabled or Disabled: • When Enabled, PTP establishes independent Wireless Receiver/Transmitter (WRT) protocol segments – one for LAN, and one for WAN.
Page 190: 6.2.1.13.5 Config: Ip  Portmonitor
Each entry allows a user to specify an IP address and a subnet mask to define a unique class of machines that are allowed access. Once you define and enable an access list via SNMP or the CDM-425 Web Server interface ‘Admin | Access’ page, functionality of this menu appears as follows:...
Page 191: 6.2.1.13.7 Config: Ip  Pktp-Enable
CDM-425 Advanced Satellite Modem Revision 0 6.2.1.13.7 CONFIG: IP  PktP-Enable You may access this menu only when you have installed the optional IP Packet Processor card. Packet Processor: Enabled (Ena, Dis) () (Modem will auto-reboot after change!) Use the ▲▼ arrow keys to select the card as Ena(bled) or Dis(abled): •...
Page 192: Select: Test Menu Branch
CDM-425 Advanced Satellite Modem Revision 0 6.2.2 SELECT: Test Menu Branch TEST: Mode BERT () CnC-APC-Monitor Uncorrected-BER Use the ◄ ►arrow keys to select a test parameter. Press ENTER. SELECT: TEST  Mode 6.2.2.1 Modem Test Mode = Normal () (NORM,Tx-CW,Tx-1/0,IF↓,RF↓,DIG↓,I/O↓)
Page 193 CDM-425 Advanced Satellite Modem Revision 0 Setting Function (RF Loopback) Use this test mode to perform a satellite loopback. It is almost identical to the IF loop mode, except that all receive configuration parameters (except Rx Spectrum Invert) RF-LOOP (RF↓) are temporarily changed to match those of the transmit side;...
Page 194 CDM-425 Advanced Satellite Modem Revision 0 Figure 6-3. Loopback Modes Front Panel Operation 6–76 MN-CDM-425...
Page 195: Select: Test  Bert
CDM-425 Advanced Satellite Modem Revision 0 SELECT: TEST  BERT 6.2.2.2 BERT: Config Monitor () Use the ◄ ►arrow keys to select Config or Monitor. Press ENTER. SELECT: TEST  BERT  Config 6.2.2.2.1 BERT Tx:Off Pattern=2047 ErrIns=Off Cnfg Rx:Off Pattern=2047 ()
Page 196: Select: Test  Cnc-Apc-Monitor
CDM-425 Advanced Satellite Modem Revision 0 SELECT: TEST  CnC-APC-Monitor 6.2.2.3 CNC-APC: BER=N/A Reset FER=N/A Reset () The test results provided on this screen are: Test Description Bit Error Rate (BER) Frame Error Rate (FER) To restart either Test, use the ◄ ►arrow keys to select (BER) Reset or (FER) Reset. Press ENTER.
Page 197 CDM-425 Advanced Satellite Modem Revision 0 Additionally, if the demodulator is in unlocked state, this menu is inaccessible and displays the following message: Demodulator is unlocked Front Panel Operation 6–79 MN-CDM-425...
Page 198: Select: Monitor Menu Branch
CDM-425 Advanced Satellite Modem Revision 0 6.2.3 SELECT: Monitor Menu Branch Monitor: Live-Alarms Stored-Events ACM Stats Rx-Params RemEbNo AUPC CnC IP () Use the ◄ ►arrow keys to select a parameter. Press ENTER. 6.2.3.1 Monitor: Live-Alarms Live Unit=None Alarms Rx=Demod Lock Tx=No Clock ()
Page 199 CDM-425 Advanced Satellite Modem Revision 0 Alarm Type Description Clock activity from the Tx terrestrial source is checked if expected. The modem falls back to the internal Serial Clock Transmit (SCT) clock to No Clock (Transmit) drive the modulator if clock activity is absent.
Page 200: Monitor: Stored Events Stored Events: Clear-All: No (No, Yes)
CDM-425 Advanced Satellite Modem Revision 0 6.2.3.2 Monitor: Stored Events Stored Events: Clear-All: No (No, Yes) #199 FT- Frame Sync 25/10/07 16:25:24 An example of a Stored Events screen is shown here. Use the ◄ ►arrow keys to select the ‘#’...
Page 201: Monitor: Statistics
CDM-425 Advanced Satellite Modem Revision 0 6.2.3.4 Monitor: Statistics This display shows the statistics data that has been measured and recorded. To enable statistics logging, see Sect. 6.2.1.10.4. For statistics logging, you first define a measurement interval (see CONFIG: Stats).
Page 202 CDM-425 Advanced Satellite Modem Revision 0 Example 1: 08.0,13.5,2.5,1.8,30.0,25.1 means: (08.0) Minimum Eb/No observed in the measurement interval = 8.0 dB (13.5) Average Eb/No observed in the measurement interval = 13.5 dB (2.5) Maximum TPLI observed in the measurement interval = 2.5 dB...
Page 203: Monitor: Rx Parameters Rx-Parameters: Ebno=11.4Db ∆F=+011.7Khz
CDM-425 Advanced Satellite Modem Revision 0 The modem calculates and then displays, on the top line from left to right, statistics data as follows: • (22.0,22.0) First, the SNR is calculated: The minimum SNR value observed during the measurement interval is provided first, and then the average SNR observed value follows.
Page 204: Monitor: Remoteebno
CDM-425 Advanced Satellite Modem Revision 0 If the demodulator is locked, then this screen displays the following: Item Description This shows the value of Eb/No calculated by the demodulator. The value referred to here is the Eb/No energy per information bit (Ebi), divided by the noise spectral density (No).
Page 205: Monitor: Cnc-Parameters
CDM-425 Advanced Satellite Modem Revision 0 For IP-ACM or V2-ACM modes only: For Eb/No info, see ACM Monitor menu Transmit Power Increase= 1.2 dB The top line message directs you to consult the Monitor: ACM menu for the Remote and Local SNR values that is available in place of Remote Eb/No data.
Page 206: Select: Info (Information) Menu Branch
CDM-425 Advanced Satellite Modem Revision 0 6.2.4 SELECT: Info (Information) Menu Branch Info: All ID Mode Clocks EDMAC Drop Insert Remote Alarm-Mask Misc These read-only screens display the modem’s current configuration information without risking inadvertent changes. Use the ◄ ►arrow keys to select a parameter. Press ENTER.
Page 207: Info: Mode
CDM-425 Advanced Satellite Modem Revision 0 6.2.4.3 Info: Mode Info: Mode: Tx= RS422 :None Rx= RS422 :None This screen displays the active operating interface and framing modes that were selected using the CONFIG: Tx Mode and CONFIG: Rx  Mod menus.
Page 208: Info: Rx
CDM-425 Advanced Satellite Modem Revision 0 6.2.4.5 Info: Rx Rx:0070.0000MHz 02.0dB +-30 RSI=N VF2L 01544.000 QPSK .489 Scrm This screen displays the following information: Item Configuration Setting Rx Frequency xxxx.xxxx MHz Eb/No 12.3 dB (Alarm Point) Top line Sweep Range Up to ±...
Page 209: Info: Clocks
CDM-425 Advanced Satellite Modem Revision 0 6.2.4.6 Info: Clocks Clocks:Tx=Int(SCT) CEX=RxEnable E1-unbal Rx=Int(SCT) Buffer=00016bytes REF=Int10 This screen displays information for Tx Clock, G.703 Clock Extension, Rx Clock, Reference, and Buffer. 6.2.4.7 Info: EDMAC EDMAC Function= On EDMAC Mode= Master EDMAC Addr= 0020 This screen indicates whether or not EDMAC is enabled.
Page 210: 6.2.4.10 Info: Remote
CDM-425 Advanced Satellite Modem Revision 0 6.2.4.10 Info: Remote Remote-Control= Local Address= 0000 Interface= RS-232 9600 baud This screen displays if the unit is in Local, Remote or Ethernet (IP) mode; the electrical interface type selected; the unit’s address; and the active baud rate.
Page 211: Select: Store/Ld (Store/Load) Menu Branch
CDM-425 Advanced Satellite Modem Revision 0 6.2.5 SELECT: Store/Ld (Store/Load) Menu Branch Configuration #2: Load Store () AVAILABLE You can store up to 10 modem configurations into an assigned “slot” – 0 through 9. If a configuration slot is available for storage, the bottom line notes the status of that slot as AVAILABLE.
Page 212: Select: Utility Menu Branch
CDM-425 Advanced Satellite Modem Revision 0 6.2.6 SELECT: Utility Menu Branch Utilities: Set-RTC Display-Bright CarrID Redundancy Circuit-ID Firmware Use the ◄ ►arrow keys to select Set-RTC, Display-Bright, CarrID, LED, Redundancy, Circuit- ID, or Firmware. Press ENTER. 6.2.6.1 Utilities: Set-RTC Edit Real-Time Clock:...
Page 213: Utilities: Carrid
CDM-425 Advanced Satellite Modem Revision 0 6.2.6.3 Utilities: CarrID Appendix D. CARRIER ID (DVB-CID M ®) ARRIER Before using Carrier ID, be sure to use this menu to first create a MetaCarrier custom message of 24 characters or less. ≥...
Page 214: Utilities: Carrid  Longitude
CDM-425 Advanced Satellite Modem Revision 0 Utilities: CarrID  Longitude 6.2.6.3.2 CarrierID Longitude: 111°58.28’W () Set the Carrier ID Longitudinal Coordinate by using the ◄ ►arrow keys to select an alphanumeric character space. Then, use the ▲▼ arrow keys to change that character. Press ENTER.
Page 215: Utilities: Led
CDM-425 Advanced Satellite Modem Revision 0 6.2.6.4 Utilities: LED Front Panel LED Test: Enabled (Enable,Disable) () Use the ▲▼ arrow keys to select Enable, and then press ENTER to execute a test of all of the LEDs on the front panel. Normal operations resume upon completion of the test.
Page 216: Utilities: Redundancy  1:N
CDM-425 Advanced Satellite Modem Revision 0 Utilities: Redundancy  1:N 6.2.6.5.3 1:N Mode: (use with CAUTION!) Disabled (Enable, Disable) () For use when the unit is part of a 1:N redundant application (e.g., via a CRS-300 1:10 Redundancy Switch). Use the ▲▼ arrow keys to select 1:N Mode operation as Enable or Disable.
Page 217: Utilities: Firmware
Select () Use these submenus to view information about the CDM-425 Base Modem internal firmware. This screen identifies the firmware image that is loaded on startup or reboot of the Base Modem with an asterisk (*). Use the ◄ ►arrow keys to select Boot-Rom, Image#1, Image#2, or Select.
Page 218: Utilities: Firmware  Packet-Processor
Image#2 Select () This screen identifies, with an asterisk (*), the optional CDM-425 IP Packet Processor internal firmware image that is loaded on startup or reboot of the Base Modem. Use the ◄ ►arrow keys to select Boot-Rom, Image#1, Image#2, or Select. Press ENTER.
Page 219: Select: Odu Menu Branch (Summary Only)
Depending on 70/140 MHz or L-Band operation: Use this menu branch to monitor and control a standalone or redundant Comtech EF Data RF Transceiver (CSAT-5060 or KST-2000A/B) or LPOD BUC, when connected. See Chapter 10. CDM-425 ODU (TRANSCEIVER, BUC, LNB) OPERATION for complete details about this product-specific menu branch.
Page 220 CDM-425 Advanced Satellite Modem Revision 0 You must contact Comtech EF Data Product Support to purchase the FAST Access Code for the desired option. Available options include: ► Data Rate when configured for CnC (DoubleTalk Carrier-in-Carrier) ► Data Rate when configured for VersaFEC ►...
Page 221: Fast: Options  Set Register1 Or Set Register 2
ENTER the FAST Access Code that you have obtained from Comtech EF Data carefully using the front panel keypad or, alternately, the CDM-425 Web Server (HTTP) Interface: From the CDM-425 front panel – Use the ◄ ►arrow keys to select a digit, and then use •...
Page 222: Fast: Demo-Mode
() 1209600 seconds remaining. FAST Options Demo Mode allows access to ALL CDM-425 FAST options for 2592000 seconds (30 calendar days). On the top line, use the ▲▼ arrow keys to select Demo Mode as Off or On. Press ENTER.
Page 223: Fast: Cnc
When the counters expire, you will see the following message: Fractional CnC is not installed. As per the previous screen examples, if you do not install Fractional CnC in the CDM-425, the modem displays a message reflecting this state and provides “time remaining” and “time remaining refill”...
Page 224 CDM-425 Advanced Satellite Modem Revision 0 • 90-DayCounter – This is the amount of time, in seconds, that that the modem can be run in CnC mode. This counter decrements under the following conditions: The modem has a Fractional CnC license;...
Page 225: Chapter 7. Ethernet-Based Remote Product Management
Chapter 7. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT Overview The CDM-425 Advanced Satellite Modem base unit is equipped with four RJ-45 10/100 BaseT Ethernet connectors, subject to the following conditions: • When Dedicated Management is disabled, you may use any port for Ethernet-based remote product management (monitor and control) purposes.
Page 226: Snmp Interface
CDM-425 Advanced Satellite Modem through FSK. KST-2000A/B Transceiver MIB file MIB file consists of a subset of the CDM-425 MIB with all OIDs used manage to a FW-0021105*.mib distant-end CDM-425. SNMP "gets" and "sets" are sent to the local CDM-425 and DistantEnd CDM-425 MIB file EDMAC3 is used to communicate efficiently with the distant end modem.
Page 227: Snmp Community Strings
You only need to compile the “Traps” file if you intend to use SNMPv1 traps. You may configure which style of traps the modem sends by using the CDM425SNMPTrapVersion OID. The CDM-425 Advanced Satellite Modem supports the following MIB2 v1 traps / v2 notifications: MIB2 SNMPv1 trap: Authentication Failure MIB2 SNMPv2 notifications: Authentication Failure 1.3.6.1.6.3.1.1.5.5...
Page 228 CDM-425 Advanced Satellite Modem Revision 0 The CDM-425 Advanced Satellite Modem supports the following Alarms and Faults SNMPv1 traps / SNMPv2 notifications: Alarms and Faults SNMPv1 traps cdm425UnitAlarmV1 62471121 cdm425TxTrafficAlarmV1 62471122 cdm425RxTrafficAlarmV1 62471123 cdm425BUCAlarmV1 62471124 cdm425LNBAlarmV1 62471125 cdm425RedundancyStateTrapV1 62471126 cdm425FractionalCnCTrapV1...
Page 229: Telnet Interface
Chapter 8. SERIAL-BASED REMOTE PRODUCT MANAGEMENT Chapter 9. TELNET COMMAND-LINE INTERFACE (CLI) OPERATION Comtech EF Data provides a Telnet interface for the purpose of equipment monitor and control (M&C) using either the standard remote control protocol or, when the optional IP Packet Processor is installed and enabled, the Telnet Command Line Interface (CLI).
Page 230: Using Hyperterminal For Telnet Remote Control Operation
CDM-425 Advanced Satellite Modem Revision 0 7.4.1.1 Using HyperTerminal for Telnet Remote Control Operation There is a disadvantage when using Windows Command-line as a Telnet client with the serial- based Remote Control protocol. Since Command-line cannot translate a ‘\r’ (i.e., carriage return or “CR”) to a ‘\r\n’...
Page 231: Using The Telnet Interface For Telnet Command Line Interface (Cli) Operation
3. The HyperTerminal terminal emulator, while compatible for use with remote control operations, is not supported or recommended for Telnet CLI operation. Instead, for best results Comtech EF Data recommends PuTTY or Tera Term or as the preferred terminal emulators (Figure 7-1).
Page 232: Http (Web Server) Interface
Revision 0 HTTP (Web Server) Interface A user-supplied Web browser allows the full monitor and control (M&C) of the CDM-425 Advanced Satellite Modem from its HTTP Interface. The CDM-425’s embedded web application is designed for, and works best with, Microsoft’s Internet Explorer Version 9.0 or higher. Comtech EF Data does not recommend setting your browser to IE7 Compatibility Mode.
Page 233 CDM-425 Advanced Satellite Modem Revision 0 HTTP Login User Access Levels are further defined as follows: HTTP Login User Access Level Admin User Read/Write User Read Only User No Access to Admin or IP Packet Processor- No Access to Admin or IP Packet Processor- Full Access to all related web pages.
Page 234: Http Interface - Operational Features
CDM-425 Advanced Satellite Modem Revision 0 7.5.2 HTTP Interface – Operational Features 7.5.2.1 Navigation This interface features navigation tabs located at the top of each page. After you click a navigation tab, you may click an available primary page tab. In turn, any nested tabs appear for further selection.
Page 235: Text Or Data Entry
CDM-425 Advanced Satellite Modem Revision 0 7.5.2.5 Text or Data Entry Text boxes let you type data into a field. An action button may be associated with a single text box, or a group of text boxes. For any text box, left-click anywhere inside the box, type the desired information into that field, and be sure to press [ENTER] when done.
Page 236 CDM-425 Advanced Satellite Modem Revision 0 Figure 7-2. HTTP (Web Server) Interface Menu Tree (FW Ver. 1.1.1r) Ethernet-based Remote Product Management 7–12 MN-CDM-425...
Page 237: Conditional Access To Ip Packet Processor
CDM-425 Advanced Satellite Modem Revision 0 7.5.3.1 Conditional Access to IP Packet Processor Pages Carefully review the information in this section. There are a significant number of pages in the HTTP Interface that address operation of the modem once it is equipped with the optional IP Packet Processor card. These pages are accessible only when you install and enable the optional IP Packet Processor card.
Page 238 CDM-425 Advanced Satellite Modem Revision 0 Click [Back to previous page] to continue any other available operations, or go to the Packet Processor drop-down list (in the Network Configuration section of the ‘Configuration | LAN | IP’ page) to select its operation as Enabled (the modem will automatically reboot).
Page 239: Web Server
CDM-425 Advanced Satellite Modem Revision 0 7.5.4 Web Server Page Descriptions Access to and availability of certain HTTP Interface pages are dependent upon the options purchased for operation (e.g., the IP Packet Processor card) as well as the detected presence of auxiliary equipment (e.g., Block Up Converters, Low Noise Block Down Converters, Redundancy Switches, etc.), as installed and...
Page 240: Home | Contact
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.1.2 Home | Contact Use the Home | Contact page to view phone numbers for Sales and Support services or click on the link on the page to send an e-mail request. Figure 7-4. Home | Contact Page Ethernet-based Remote Product Management 7–16...
Page 241: Home | Support
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.1.3 Home | Support Use the Home | Support page to send a problem report to the Service Department. Figure 7-5. Home | Support Page Ethernet-based Remote Product Management 7–17 MN-CDM-425...
Page 242: Admin Tab
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.2 Admin Tab Use the Admin tab to access the following pages: • Access • SNMP • Firmware Base Modem Packet Processor • Reboot • FAST • Utilities The Admin pages are available only to users who have logged in using the Administrator Name and Password.
Page 243 CDM-425 Advanced Satellite Modem Revision 0 System Account Access Information • Read Only, Read/Write, and Admin Names and Passwords – The factory defaults for these user names and passwords are: Description Factory Default User Name / Password Typical Parameters Read Only...
Page 244 Server Shared Secret – Carefully enter the word to be used (64 characters maximum) as the ”shared secret” between the RADIUS Client Server and the networked device (CDM-425). The interface conceals this entry for security purposes. • Server Port – Enter a valid port number from 1 to 65535 (the default is 1812).
Page 245: Admin | Snmp
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.2.2 Admin | SNMP • Chapter 6. FRONT PANEL OPERATION • Sect. 7.3 SNMP INTERFACE The Administrator must use this page to set and return administration information for the modem's SNMP feature. Figure 7-7. Admin | SNMP Page SNMP •...
Page 246: Admin | Firmware
CDM-425 Advanced Satellite Modem Revision 0 • CDM-425 MIB Compatibility: Use the drop-down list to select as Disabled or Enabled. • This feature is available only when the optional IP Packet Processor is installed and enabled. When enabled, you may use CDM-425 MIBs to monitor and control features.
Page 247 CDM-425 Advanced Satellite Modem Revision 0 Boot This window identifies the firmware number, version, and release date that is loaded upon power- up/boot up of the unit. Image 1 / Image 2 These scrollable windows identify the Firmware numbers, versions, and release dates that comprise the aggregate image load.
Page 248 CDM-425 Advanced Satellite Modem Revision 0 Admin | Firmware | Packet Processor This nested page is accessible only to Admin users and when you install and enable the optional IP Packet Processor card. See Sect. 7.5.3.1 for complete details about using conditional access pages.
Page 249: Admin | Reboot
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.2.4 Admin | Reboot Use this page to perform a soft reboot of the modem using the current, active firmware Image as selected on the ‘Admin | Firmware | Base Modem’ page (Sect. 7.5.4.2.3.1) and/or the ‘Admin | Firmware | Packet Processor’...
Page 250: Admin | Fast
Figure 7-11. Admin | FAST Page FAST Code When you obtain a FAST access code from Comtech EF Data, it will be for a specific option register. Carefully enter each register-specific 20-character FAST access code in sequence, and then click [Submit FAST code] when done. A message will display at the top of this section that states whether or not the codes are accepted or if the upgrade is successful.
Page 251 Revision 0 Demo Time Remaining FAST Options Demo-Mode allows access to all CDM-425 FAST options* for 30 calendar days. This section displays the remaining time in days, hours, and minutes. * The AES Feature is available only when the CDM-425 is equipped with the optional IP Packet Processor with AES software.
Page 252: Admin | Utilities
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.2.6 Admin | Utilities Use this page to “ping” a device on the network for diagnostic purposes. Figure 7-12. Admin | Utilities Page Ping • IP Address – Enter the IP Address for the network device in the format XXX.XXX.XXX.XXX.
Page 253: Configuration Tab
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.3 Configuration Tab Use the ‘Configuration’ tab to access all operating parameters for the CDM-425, including its ODUs (Outdoor Units) when connected. Use the Configuration tab to access the following pages: • Modem •...
Page 254: Configuration | Modem
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.3.1 Configuration | Modem • Chapter 6. FRONT PANEL OPERATION • Appendix F. D C) OPTION OUBLETALK ARRIER ARRIER • Appendix K. V FEC/V FEC-2 ADAPTIVE CODING AND ERSA ERSA MODULATION (ACM) OPTION Figure 7-13. Configuration | Modem Page (Non-ACM Modes) Ethernet-based Remote Product Management 7–30...
Page 255 CDM-425 Advanced Satellite Modem Revision 0 Figure 7-14. Configuration | Modem Page (IP-ACM Mode) Ethernet-based Remote Product Management 7–31 MN-CDM-425...
Page 256 CDM-425 Advanced Satellite Modem Revision 0 Figure 7-15. Configuration | Modem Page (VersaFEC2-ACM Mode) Ethernet-based Remote Product Management 7–32 MN-CDM-425...
Page 257 CDM-425 Advanced Satellite Modem Revision 0 Use the ‘Configuration | Modem’ page to configure these modem operating parameters: • • Tx / Rx Interfaces and Framing* Carrier-in-Carrier (CnC) Parameters • IP-ACM or VersaFEC-2 ACM • Tx / Rx Operating Parameters...
Page 258: Configuration | Lan
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.3.2 Configuration | LAN Click the IP, ARP (only after you install and enable the optional IP Packet Processor card), or the Port Monitoring tab to continue. Configuration | LAN | IP Figure 7-16. Configuration | LAN | IP Page Ethernet-based Remote Product Management 7–34...
Page 259: Network Configuration
CDM-425 Advanced Satellite Modem Revision 0 Network Configuration • Ping Reply: Use the drop-down list to select Ping Reply as Disabled or Enabled. When Enabled, the modem responds to ICMP ping requests. • MAC Address: This parameter is read-only and cannot be changed.
Page 260 CDM-425 Advanced Satellite Modem Revision 0 Router Multipoint Hub: Functions as the Hub side router in a Point-to-Multipoint network. Allows Satellite-to-Satellite packets to pass. Router Multipoint Remote: Functions as a Remote Router in a Point-to- Multipoint network. Packets from the WAN are not allowed to be sent to the WAN.
Page 261 CDM-425 Advanced Satellite Modem Revision 0 VLAN Mode VLAN Mode is supported in Managed Switch Mode, with or without the optional IP Packet Processor Enabled. • VLAN Mode: Use the drop-down list to select the mode as Disabled or Enabled.
Page 262 CDM-425 Advanced Satellite Modem Revision 0 Configuration | LAN | ARP This nested page is accessible only to Admin users and when you install and enable the optional IP Packet Processor card. See Sect. 7.5.3.1 for complete details about using conditional access pages.
Page 263 CDM-425 Advanced Satellite Modem Revision 0 Add Static ARP This section allows you to directly add a static ARP entry. Note that the index will automatically increment to the next available number. Click [Add Entry] to save. Delete Static ARP Enter Entry Index to Delete, and then click [Delete Entry] once all changes have been made in this section.
Page 264: Configuration | Routing
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.3.3 Configuration | Routing The nested Routes, Internet Group Management Protocol (IGMP), and Dynamic Host Configuration Protocol (DHCP) pages are accessible only to Admin users and when you install and enable the optional IP Packet Processor card. See Sect.
Page 265 CDM-425 Advanced Satellite Modem Revision 0 Route Table (Edit) This section displays and allows you to edit all current Route Table entries. Note the following: Column Description This is the internal table index that is automatically assigned and cannot be edited.
Page 266 CDM-425 Advanced Satellite Modem Revision 0 Configuration | Routing | IGMP This page permits use of Internet Group Management Protocol (IGMP) with configured multicast routes. IGMP, when enabled, responds to IGMP queries for the configured multicast routes on the transmit side and generates IGMP queries on the receive side. If there are no active IGMP receivers on the LAN, it will stop forwarding the multicast traffic (received from the satellite) to the LAN.
Page 267 CDM-425 Advanced Satellite Modem Revision 0 • Query Response Interval: This is the maximum response time inserted into the periodic general queries. By varying the Query Response Interval, a modem administrator may tune the “burstiness” of IGMP messages on the subnet; note that larger values make the traffic less “bursty”...
Page 268: Dhcp Relay
The DHCP Relay feature allows you to deploy a single DHCP server at the hub that manages all of the devices throughout your remote networks. When a device on the CDM-425's network issues a DHCP request, it is relayed to the DHCP server as specified by the "DHCP Server IP Address".
Page 269 CDM-425 Advanced Satellite Modem Revision 0 Configuration | Routing | DNS Use this page to manage DNS (Domain Name System) caching. DNS caching provides an efficient way for DNS to keep the Internet synchronized as the IP addresses of some servers change and as new servers come online.
Page 270: Configuration | Managed Switch
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.3.4 Configuration | Managed Switch The features on this nested page are accessible only to Admin users and when you install and enable the optional IP Packet Processor card. See Sect. 7.5.3.1 for complete details about using conditional access pages.
Page 271: Configuration | Wan
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.3.5 Configuration | WAN The nested QoS, Compression, and Encryption pages are accessible only to Admin users and when you install and enable the optional IP Packet Processor card. See Sect. 7.5.3.1 for complete details about using conditional access pages.
Page 272 CDM-425 Advanced Satellite Modem Revision 0 Figure 7-25. Configuration | WAN | QoS Page (Configured) QoS Rules Table For the ‘Max/Priority’ page: For the ‘Min/Max’ page: Ethernet-based Remote Product Management 7–48 MN-CDM-425...
Page 273 CDM-425 Advanced Satellite Modem Revision 0 This section displays all existing QoS Rules Table entries. From left to right: Column Description This is the internal table index that is automatically assigned and cannot be edited. Index Specifies the protocol for the specific rule.
Page 274 CDM-425 Advanced Satellite Modem Revision 0 For the “Min/Max” page: From left to right: Column Description Use the drop-down list to select the Protocol as UDP, TCP, ICMP, RTP, VOICE, Protocol VIDEO, RTPS, FTP, HTTP, TELNET, SMTP, SNMP, All-IP, Non-IP, or All.
Page 275 CDM-425 Advanced Satellite Modem Revision 0 Column Description (“Max/Priority” page only) Use the drop-down list to assign a Priority Level from 1 Priority to 8 for each flow: • The IP Module classifies each packet that is to be forwarded over the satellite;...
Page 276 CDM-425 Advanced Satellite Modem Revision 0 Delete All (Max/Pri, Min/Max) QoS Rules – Use With Caution For the ‘Max/Priority’ page: For the ‘Min/Max’ page: For either page, use the drop-down list to select Yes, and then click [Submit] to execute the deletion of all rules from the QoS Rules Table.
Page 277 CDM-425 Advanced Satellite Modem Revision 0 DiffServ Mode Appendix M. QUALITY of SERVICE (QoS) QoS can be set to DiffServ Mode to make it fully compliant to the Differentiated Services QoS RFC (Request For Comments) standards. See Appendix M. QUALITY of SERVICE (QoS), Sect.
Page 278 CDM-425 Advanced Satellite Modem Revision 0 Differentiated Services ASFD Precedence Based Priority: Use the drop-down list to select Disable or Enable: • In the default disabled state, the priorities of all Assured Forwarding Classes are the same (Priority = 8).
Page 279 CDM-425 Advanced Satellite Modem Revision 0 Column Description [ -0.000 / (Tx Data Rate)] This field is active when the Assured Forwarding Service Rate (kbps) (ASFD) Bandwidth Mode is set to Datarate.The minimum bandwidth will be served first among the ASFD classes in case of bandwidth availability once Class Selector 7 through Class Selector 1 have been serviced.
Page 280 CDM-425 Advanced Satellite Modem Revision 0 Configuration | WAN | Compression Use this page to configure the optional Payload and Header Compression, when this FAST feature is enabled. Figure 7-27. Configuration | WAN | Compression Page Compression Availability This section provides a hyperlink to the ‘Configuration | Managed Switch’ page (see Sect.
Page 281 Configuration | WAN | Encryption Chapter 5. FAST ACTIVATION PROCEDURE FAST features such as Encryption may be purchased from Comtech EF Data Sales Representatives during normal business hours. See Sect. 5.2.8 SELECT: FAST Menus or Chapter 5. FAST ACTIVATION PROCEDURE in this manual for addtional information about activating FAST features.
Page 282 CDM-425 Advanced Satellite Modem Revision 0 Encryption Status Section This section displays the active state of the AES Encryption option: • Per the example shown in Figure 7-28, when the AES Encryption FAST feature is enabled, this section displays the message “Encryption is available.” All functionality of this page is operable –...
Page 283 CDM-425 Advanced Satellite Modem Revision 0 Encryption / Decryption Keys A typical encryption or decryption key consists of a string of 32 characters, using any combination of the numbers ‘0’ through ‘9’ and the letters ‘a’ through ‘f’ / ‘A’ through ‘F’.
Page 284: Configuration | Overhead
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.3.6 Configuration | Overhead Chapter 6. FRONT PANEL OPERATION Appendix F. D OPTION OUBLE ARRIER ARRIER This page appearance depends on whether Carrier-in-Carrier Automatic Power Control (CnC-APC) Mode is selected. Figure 7-29. Configuration | Overhead Page – AUPC Mode Figure 7-30.
Page 285 CDM-425 Advanced Satellite Modem Revision 0 Use this page to configure the following overhead interfaces. See Appendix F. D OUBLE OPTION, See Sect. F.6 Carrier-in-Carrier Automatic Power Control ARRIER ARRIER (CnC-APC) for complete details about, and setup of, the CnC-APC feature.
Page 286: Configuration | Utilities
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.3.7 Configuration | Utilities Click the Utilities1 or CarrierID tab to continue. Configuration | Utilities | Utilities1 Figure 7-31. Configuration | Utilities | Utilities1 Page Redundancy 1:1 Tx Power Level: Select Synchronized or Independent from the drop down list. Click [Submit] to save.
Page 287 Appendix D. CARRIER ID (MetaCarrier®) It is IMPORTANT to understand that Circuit ID and the MetaCarrier Custom Message are two distinct features of the CDM-425. Read your documentation carefully. With Carrier ID Enabled, the first 24 characters of the 40-character Circuit ID are intended for and sent as the MetaCarrier Custom Message.
Page 288 [Update] to refresh a test already in progress. Save / Load (Save takes precedence over Load) The Save/Load feature stores and retrieves the CDM-425 Base Modem settings only. It does not include the optional IP Packet Processor settings. As a safeguard, to prevent any inadvertent action the Save Location and Load Location drop- down lists’...
Page 289 It is IMPORTANT to understand that the Carrier ID and MetaCarrier Custom Message are two distinct features of the CDM-425. Read your documentation carefully. With Carrier ID Enabled, the first 24 characters of the 40-character Circuit ID are intended for and sent as the MetaCarrier Custom Message.
Page 290: Configuration | D&I
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.3.8 Configuration | D&I Chapter 6. FRONT PANEL OPERATION Appendix E. CLOCK MODES DROP INSERT (D&I) Figure 7-33. Configuration | D&I Page (Selected Framing Mode = D&I) The appearance of this page is dependent on the framing mode selected on the ‘Configuration | Modem’...
Page 291: Configuration | Buc
LNB) OPERATION Chapter 10. OUTDOOR UNIT (ODU) (TRANSCEIVER, BUC, After configuring the CDM-425 for L-Band operation and when a Block Up Converter (BUC) is installed, use this page to configure its operating parameters and to view the BUC operational status.
Page 292: Configuration | Lnb
Chapter 10. OUTDOOR UNIT (ODU) (TRANSCEIVER, BUC, LNB) OPERATION After configuring the CDM-425 for L-Band operation, and when a Low Noise Block Down Converter (LNB) is installed, use this page to configure its operating parameters and to view the LNB operational status.
Page 293: Configuration | Ant
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.3.11 Configuration | ANT Appendix I. ETHERNET NETWORK CONFIGURATION The ANT feature provides IP-based protocols to synchronize the modem's internal time-of-day clock to an external device such as a time server, Base Station Controller (BSC), or Radio Network Controller (RNC).
Page 294 CDM-425 Advanced Satellite Modem Revision 0 • Feature:Use the drop-down list to set PTP operation as Enabled or Disabled. If Enabled, PTP is used to establish independent Wireless Receiver/Transmitter (WRT) protocol segments – one for LAN and the other for WAN.
Page 295 CDM-425 Advanced Satellite Modem Revision 0 Configuration | ANT | SNTP Appendix I. ETHERNET NETWORK CONFIGURATION SNTP is used to synchronize computer clocks throughout a computer network when the ultimate performance of the full NTP implementation as per RFC-1305 (Requests for Comment No. 1305: Network Time Protocol, Version 3, Specification, Implementation and Analysis) is not needed or justified.
Page 296: Configuration | Meo
MEO Operational Modes to be accessible. Otherwise, this page is nonfunctional. CDM-425 Advanced Satellite Modems are configurable for continuous pairing as Primary and non-Primary Modems in an Antenna Handover System when the MEO feature is enabled. Ethernet data traffic is transmitted and received via the Primary and Non-Primary CDM-625’s four 10/100 Ethernet ports.
Page 297 CDM-425 Advanced Satellite Modem Revision 0 Feature: Use the drop-down list to select MEO as Disabled or Enabled. Click [Submit] to save. Once the MEO feature is enabled, you may set the Antenna Handover operating parameters. Antenna Handover • Handover Type: Use the drop-down list to select Break Before Make or Make Before Break.
Page 298: Status
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.4 Status Pages The Status pages provide you with status, event logging, and operational statistics windows. Click the Modem Status, Modem Logs, Modem Info, Traffic Statistics, or – when you install and enable the optional IP Packet Processor card – the Performance tab to continue.
Page 299 CDM-425 Advanced Satellite Modem Revision 0 When an ACM mode is active, the ACM section of this page appears as follows: Figure 7-40. Status | Modem Status Page (IP-ACM or V2-ACM Mode Active) Ethernet-based Remote Product Management 7–75 MN-CDM-425...
Page 300: Status | Modem Logs
CDM-425 Advanced Satellite Modem Revision 0 7.5.4.4.2 Status | Modem Logs Chapter 6. FRONT PANEL OPERATION Click the Base Modem tab, or – when you install and enable the optional IP Packet Processor card – the Packet Processor tab to continue.
Page 301 Statistics Log If you change your operating mode between Non-ACM and ACM (IP-ACM or V2- ACM) modes, Comtech EF Data recommends that you execute the Clear Statistics Log feature before retrieving any further statistics. Under normal operation, this section contains statistics information as per this example: •...
Page 302 CDM-425 Advanced Satellite Modem Revision 0 Alarm Mask Use the option buttons provided to define a designated alarm as Masked or Active, and then click [Submit Alarm Mask] to save these changes. Ethernet-based Remote Product Management 7–78 MN-CDM-425...
Page 303 CDM-425 Advanced Satellite Modem Revision 0 Status | Modem Logs | Packet Processor This nested page is accessible only to Admin users and when you install and enable the optional IP Packet Processor card. See Sect. 7.5.3.1 for complete details about using conditional access pages.
Page 304: Status | Modem Info
CDM-425 Advanced Satellite Modem Revision 0 Event Logging Table The Event Login Table displays a maximum of 256 events. Each event is assigned a sequential Index number; its type, the date and time of occurrence, and a description of the event follows.
Page 305 CDM-425 Advanced Satellite Modem Revision 0 7.5.4.4.4 Status | Traffic Statistics Click the Ethernet, WAN, or Clear Counters tab – and, when you install and enable the optional IP Packet Processor card – the Router, Managed Switch, WAN, Compression, QoS, PTP, MAC Table, or Clear Counters tab to continue.
Page 306 CDM-425 Advanced Satellite Modem Revision 0 Status | Traffic Statistics | Ethernet Use this page to view Ethernet Ingress/Egress Statistics on a ‘Per Port’ basis. Figure 7-44. Status | Traffic Statistics | Ethernet Page Click [Clear Statistics] to clear all Ethernet statistics from the buffer.
Page 307 CDM-425 Advanced Satellite Modem Revision 0 Status | Traffic Statistics | Router This nested page is accessible only to Admin users and when you install and enable the optional IP Packet Processor card. See Sect. 7.5.3.1 for complete details about using conditional access pages.
Page 308 CDM-425 Advanced Satellite Modem Revision 0 Status | Traffic Statistics | Managed Switch This nested page is accessible only to Admin users and when you install and enable the optional IP Packet Processor card. See Sect. 7.5.3.1 for complete details about using conditional access pages.
Page 309: Status | Traffic Statistics
CDM-425 Advanced Satellite Modem Revision 0 Status | Traffic Statistics | WAN This appearance of this page depends on whether the optional IP Packet Processor card is not installed / installed but Disabled or if it is installed and enabled. See Sect. 7.5.3.1 for complete details about using conditional access pages.
Page 310 CDM-425 Advanced Satellite Modem Revision 0 Figure 7-48. Status | Traffic Statistics | WAN Page (IP Packet Processor Installed) Ethernet-based Remote Product Management 7–86 MN-CDM-425...
Page 311 CDM-425 Advanced Satellite Modem Revision 0 For either page version, note the following: Clear Statistics / WAN Statistics Click [Clear] or [Clear Statistics] to clear all WAN statistics from the buffer. Click [Refresh] to update the page with the latest available statistics.
Page 312 CDM-425 Advanced Satellite Modem Revision 0 Status | Traffic Statistics | Compression This nested page is accessible only to Admin users and when you install and enable the optional IP Packet Processor card. See Sect. 7.5.3.1 for complete details about using conditional access pages.
Page 313 CDM-425 Advanced Satellite Modem Revision 0 Status | Traffic Statistics | QoS This nested page is accessible only to Admin users and when you install and enable the optional IP Packet Processor card. Sect. 7.5.3.1 for complete details about using conditional access pages.
Page 314 CDM-425 Advanced Satellite Modem Revision 0 Status | Traffic Statistics | PTP Appendix I. ETHERNET NETWORK CONFIGURATION Use this page to obtain data intended to troubleshoot PTP operational issues. See Appendix I. ETHERNET NETWORK CONFIGURATION, Sect. I.7.3 PTP (Precision Time Protocol).
Page 315 CDM-425 Advanced Satellite Modem Revision 0 PTP Status Click [Refresh] to update this section with its most recently accumulated statistics. These status parameters are read-only and cannot be changed. Note the following: Row Title Description (from top) PTP Offset Displays the offset, in seconds, between the modem’s slave clock and its master.
Page 316 CDM-425 Advanced Satellite Modem Revision 0 This statistics table breaks down the number of PTP packets sent (Tx columns) or received (Rx columns) on the LAN and WAN ports as follows: Row Title Description (from top) Event Port Number of packets (PTP or other) transmitted/received on the PTP UDP event-message port.
Page 317: Mac Table
CDM-425 Advanced Satellite Modem Revision 0 Status | Traffic Statistics | MAC Table Use this page to view and refresh the MAC Addresses that the modem has discovered on one or more of its Ethernet switch ports. Figure 7-52. Status | Traffic Statistics | MAC Table Page MAC Table Click [Refresh] to update the page with the latest discovered MAC Addresses.
Page 318 CDM-425 Advanced Satellite Modem Revision 0 Status | Traffic Statistics | Clear Counters Use this page to clear and reset the counters for all Traffic Statistics pages (Ethernet, and when applicable, Router, Managed Switch, WAN, Compression, QoS, and PTP). Figure 7-53. Status | Traffic Statistics | Clear Counters Page Clear All Counters Click [Clear] to globally clear and reset the Traffic Statistics counters.
Page 319: Status | Performance
Click the Performance or Graphs tab to continue. Status | Performance | Performance Use this page to view a tabulated “snapshot” of the CDM-425 performance statistics. Figure 7-54. Status | Performance | Performance Page CPU Usage Component...
Page 320 CDM-425 Advanced Satellite Modem Revision 0 Status | Performance | Graphs Figure 7-55. Status | Performance | Graphs Page Use this page to view a graphical representation of the modem performance. The displayed graphs automatically update in real time. Typical for both line graph types, the X-axis denotes elapsed time; the Y-axis denotes performance, in percent.
Page 321: Odu (Outdoor Unit) Pages (Summary Only)
CSAT-5060 or KST-2000A/B Outdoor Unit that is connected via FSK to the CDM-425. 2. The Comtech EF Data LPOD Amplifier / Block Up Converter is not supported by the CDM-425 HTTP (Web Server) Interface at this time. Figure 7-56. ODU | Enable Page Figure 7-57.
Page 322 CDM-425 Advanced Satellite Modem Revision 0 Figure 7-58. ODU | Status Page Figure 7-59. ODU | Utilities Page Ethernet-based Remote Product Management 7–98 MN-CDM-425...
Page 323: Redundancy Page
Packet Processor Redundancy is supported in both 1:1 and 1:N redundant configurations using the CRS-500 M:N Redundancy System. Read your pertinent switch Installation and Operation Manuals for detailed information on using the CDM-425 in a redundancy configuration. Figure 7-60. Redundancy Page Ethernet-based Remote Product Management 7–99...
Page 324 CDM-425 Advanced Satellite Modem Revision 0 Redundancy Config • Redundancy Traffic IP Address – Enter the IP Address and subnet mask in the form XXX.XXX.XXX.XXX/YY. The Redundancy Traffic IP Address and subnet mask is different from the Traffic/Management IP Address and subnet mask that is defined on the Configuration | LAN | IP page (Sect.
Page 325: Chapter 8. Serial Remote Control
Overview The CDM-425 Advanced Satellite Modem serial remote product management interface is an electrical interface that is either an EIA-485 multi-drop bus (for the control of multiple devices) or an EIA-232 connection (for the control of a single device). The interface transmits data in asynchronous serial form, using ASCII characters.
Page 326: Basic Protocol
CDM-425 Advanced Satellite Modem Revision 0 In the other direction, on the other pair each Target has a tri-state line driver connected, and the Controller has a line-receiver connected. All the line drivers are held in high-impedance mode until one (and only one) Target transmits back to the Controller. Each Target has a unique address, and each time the Controller transmits, the address of the intended recipient Target is included in a framed 'packet' of data.
Page 327: Packet Structure
CDM-425 Advanced Satellite Modem Revision 0 8.4.1 Packet Structure The exchange of information is transmitted, Controller-to-Target and Target-to-Controller, in ‘packets’. Each packet contains a finite number of bytes consisting of printable ASCII characters, excluding ASCII code 127 (DELETE). In this context, the Carriage Return and Line Feed characters are considered printable. With one exception, all messages from Controller- to-Target require a response –...
Page 328: Start Of Packet
CDM-425 Advanced Satellite Modem Revision 0 8.4.1.1 Start of Packet • Controller-to-Target: This is the character ‘<’ (ASCII code 60) • Target-to-Controller: This is the character ‘>’ (ASCII code 62) The ‘<’ and ‘>’ characters indicate the start of packet. They may not appear anywhere else within the body of the message.
Page 329: Instruction Code Qualifier
CDM-425 Advanced Satellite Modem Revision 0 8.4.1.5 Instruction Code Qualifier This is a single character, which further qualifies the preceding instruction code. Code Qualifiers obey the following rules: 1) From Controller-to-Target, the only permitted values are: Symbol Definition The ‘=’ code is used as the Assignment Operator (AO) and is used to indicate that the parameter defined by the preceding byte should (ASCII code 61) be set to the value of the argument (s) which follow it.
Page 330: Optional Message Arguments
CDM-425 Advanced Satellite Modem Revision 0 Symbol Definition If a message was sent via a local modem to a distant end device or ODU, the message was transmitted transparently through the (ASCI code 126) local modem. In the event of the distant-end device not responding, the local modem would generate a response.
Page 331: Remote Commands And Queries
CDM-425 Advanced Satellite Modem Revision 0 Remote Commands and Queries 8.5.1 Table Indexes NOTES: 1) Index Columns – Where Column ‘C’=Command, and Column ‘Q’=Query, columns marked ‘X’ designate the instruction code as Command only, Query only, or Command or Query. Where CODE=XXX, this indicates a priority command.
Page 332 CDM-425 Advanced Satellite Modem Revision 0 Sect. 8.5.4 Unit Parameters CODE PAGE CODE PAGE CODE PAGE CODE PAGE CODE PAGE 8–27 — 8–31 — 8–31 8–31 8–39 8–36 8–33 — 8–28 8–31 8–39 8–26 8–34 8–25 8–26 8–35 8–37 8–25 8–31...
Page 333 CDM-425 Advanced Satellite Modem Revision 0 Sect. 8.5.7 Modem Performance Information CODE PAGE CODE PAGE CODE PAGE CODE PAGE CODE PAGE — 8–55 — 8–56 — 8–55 — 8–53 — 8–52 — — — — 8–55 8–57 8–55 8–53 8–52 —...
Page 334: Tx Parameters
CDM-425 Advanced Satellite Modem Revision 0 8.5.2 Tx Parameters Priority System: TIT (Highest priority) , TFM, TFT, TMD, TCR, TDR, and TSR (Lowest Priority), indicated by shading. Any change to a higher priority parameter can override any of the parameters of lower priority.
Page 335 CDM-425 Advanced Satellite Modem Revision 0 Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction Response to Query Type Arguments Command & Qualifier) & Qualifier) Tx FEC Type TFT= 1 byte, Command or Query. TFT= TFT? TFT=x...
Page 336 CDM-425 Advanced Satellite Modem Revision 0 Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction Response to Query Type Arguments Command & Qualifier) & Qualifier) …Tx FEC E=VersaFEC CCM ModCod 4 – QPSK 0.803 Code Rate F=VersaFEC CCM ModCod 5 – 8-QAM 0.642 (cont.)
Page 337 CDM-425 Advanced Satellite Modem Revision 0 Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction Response to Query Type Arguments Command & Qualifier) & Qualifier) …Tx FEC y=VersaFEC-2 ModCod 29 – 32-ARY 0.684 Code Rate z=VersaFEC-2 ModCod 30 – 32-ARY 0.708 (cont) “=VersaFEC-2 ModCod 31 –...
Page 338 CDM-425 Advanced Satellite Modem Revision 0 Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction Response to Query Type Arguments Command & Qualifier) & Qualifier) 00=1/9 09=3/7 18=3/2 27=6/1 TMR* Arguments) 01=1/8 10=1/2 19=5/3 28=7/1 TMR# 02=1/7...
Page 339 CDM-425 Advanced Satellite Modem Revision 0 Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction Response to Query Type Arguments Command & Qualifier) & Qualifier) Tx Carrier TXO= 1 byte, Command or Query. TXO= TXO? TXO=x State...
Page 340 CDM-425 Advanced Satellite Modem Revision 0 Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction Response to Query Type Arguments Command & Qualifier) & Qualifier) …AUPC In IP-ACM or VersaFEC-2 ACM mode: Parameters a=Action on max. power condition: (cont.)
Page 341 CDM-425 Advanced Satellite Modem Revision 0 Command Query Parameter Number of Response to (Instruction Description of Arguments (Instruction Response to Query Type Arguments Command & Qualifier) & Qualifier) Tx Drop DTS= 3 bytes Command or Query. (DROP parameter) DTS= DTS?
Page 342: Rx Parameters
CDM-425 Advanced Satellite Modem Revision 0 8.5.3 Rx Parameters Priority System: RIT (Highest priority) , RFM, RFT, RMD, RCR, RDR, and RSR (Lowest Priority), indicated by shading. Any change to a higher priority parameter can override any of the parameters of lower priority.
Page 343 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Argument Command & Qualifier) & Qualifier) Rx FEC Type RFT= 1 byte, Command or Query. RFT= RFT? RFT=x A thru D...
Page 344 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Argument Command & Qualifier) & Qualifier) …Rx FEC E=VersaFEC CCM ModCod 4 – QPSK 0.803 Code Rate F=VersaFEC CCM ModCod 5 – 8-QAM 0.642 (cont.)
Page 345 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Argument Command & Qualifier) & Qualifier) …Rx FEC z=VersaFEC-2 ModCod 30 – 32-ARY 0.708 Code Rate “=VersaFEC-2 ModCod 31 – 32-ARY 0.733 (cont) &=VersaFEC-2 ModCod 32 –...
Page 346 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Argument Command & Qualifier) & Qualifier) Rx Sub-Mux RMR= 2 bytes, Command or Query. RMR? RMR? RMR=xx Ratio numeric...
Page 347 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Argument Command & Qualifier) & Qualifier) Eb/No Alarm EBA= 4 bytes Command or Query. EBA= EBA? EBA=xx.x Point Sets or returns Eb/No alarm point in the form xx.x, where:...
Page 348 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Argument Command & Qualifier) & Qualifier) RX LO RLO= 6 bytes Command or Query. RLO= RLO? RLO=xxxxxs Frequency Sets or returns LNB Rx LO frequency information in the form xxxxxs, where:...
Page 349: Unit Parameters
CDM-425 Advanced Satellite Modem Revision 0 8.5.4 Unit Parameters Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Local/ LRS= 1 byte, Command or Query. LRS? LRS=x Remote 0 thru 3 Sets or returns the user’s Local/Remote status in the form x, where:...
Page 350 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) EDMAC Slave ESA= 4 bytes Command or Query. ESA= ESA? ESA=xxxx Address Sets or returns EDMAC range of addresses of distant-end units (modems or transceivers) for which this...
Page 351 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Unit Test TST= 1 byte, Command or Query. TST= TST? TST=x Mode 0 thru 6...
Page 352 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Retrieve next 80 bytes Query only. RNE? RNE=[CR]ABCddmm five unread Returns the oldest five stored events that have not yet been read over remote control in the form...
Page 353 2) If there are no new events, the unit replies with RNS*. Do not mix use of RNS and RNN. Comtech EF Data recommends that you limit your use of RNS to maintain backward-compatibility with other legacy modems or when the unit is used in CDM600/L Emulation mode.
Page 354 2) If there are no new events, the unit replies with RNN*. 3) Do not mix use of RNN and RNS. Comtech EF Data recommends that you use the RNN query instead of the legacy RNS query. RNN includes all information provided in RNS *PLUS* Rx Signal Level (RSL).
Page 355 1 byte, Command or Query. ODU= ODU? ODU=x Comms 0 or 1 Enables or disables communications, via the FSK link, with a Comtech EF Data transceiver (ODU) in the ODU? (see Description of enable form x, where: ODU* Arguments) 0=Disabled...
Page 356 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Traffic IP IPT= 18 bytes, Command or Query. IPT= IPT? IPT= Address numerical In a 1:1 system, an external M&C application addresses each modem by its unique IP address.
Page 357 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) DoubleTalk CNM= 1 byte, Command or Query. CNM= CNM? CNM=x Carrier-in- 0 thru 9...
Page 358 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) G.703 Clock CEX= 2 bytes Command or Query. (FAST option) CEX= CEX? CEX=ab Extension Sets or returns G.703 Clock Extension in the form ab, where:...
Page 359 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Rx BERT RBP= 1 byte Command or Query. RBP= RBP? RBP=x Pattern Sets or returns Rx BERT Pattern, in the form x, where:...
Page 360 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) ACM= 4 bytes Command or Query. (Only applicable in VersaFEC ACM and VersaFEC-2 ACM mode.)
Page 361 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Antenna AHD= 3 bytes Command or Query. AHD= AHD? AHD=sxx Handover Sets or returns Differential Path Delay in the form sxx, where:...
Page 362 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Carrier ID LNG= 9 bytes Command or Query. LNG= LNG? LNG=dddaaamm.mm Longitude Sets or returns the Carrier ID Longitude, in the form dddaaamm.mmbbbD, where:...
Page 363 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Radius RAT= 1 byte, Command or Query. RAT= RAT? RAT=x Server 0 or 1...
Page 364 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Port PMD= 1 byte Command or Query. PMD= PMD? PMD=x Monitoring Used to set the port monitoring destination (capturing) port in the form x, where:...
Page 365 CDM-425 Advanced Satellite Modem Revision 0 Command Query Length of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) 27=GMT+07:00 28=GMT+08:00 29=GMT+09:00 30=GMT+09:30 31=GMT+10:00 32=GMT+10:30 33=GMT+11:00 34=GMT+12:00 35=GMT+13:00 36=GMT+14:00 EXAMPLE: <0/TPZ=05 Serial Remote Control 8–41...
Page 366: Bulk Configuration Strings
MGC= 224 bytes, Command or Query. MGC= MGC? MGC=FFFF.FFFFDDD Configuration numerical entries, Global Configuration of CDM-425, in the form shown in the Response to Query column (to right) MGC? MGC?n (where DD.DDDGXRMVSPP.P fixed values, and MGC* n=0 thru 9. Baaa.aaCXIKNZffff.ffffd...
Page 367 CDM-425 Advanced Satellite Modem Revision 0 Command Response Query Number of Parameter (Instruction Description of Arguments (Instruction & Response to Query Arguments & Qualifier) Command Qualifier) …Global i=Rx Interface Type same as RIT Configuration k=Rx Ternary Code same as RTC (cont.)
Page 368 OGC Outdoor OGC= 50 Bytes Command or Query. OGC= OGC? OGC=aabxdexxxxxgggg Unit Global ODU Global Configuration of CDM-425, in the form shown in the Response to Query column (to the right), OGC? OGC?n (where hhhhxxxxixklllnnnFFFFF Copy where: OGC* n=0 thru 9.
Page 369 CDM-425 Advanced Satellite Modem Revision 0 Command Response Query Number of Parameter (Instruction Description of Arguments (Instruction & Response to Query Arguments & Qualifier) Command Qualifier) Drop & Insert DNI= 51 bytes Command or Query. (D&I only) DNI= DNI? DNI=ddddddddddddddd Sets or returns D&I in the form ddddddddddddddddddddddddtiiiiiiiiiiiiiiiiiiiiiiiiTL, where:...
Page 370 CDM-425 Advanced Satellite Modem Revision 0 Command Response Query Number of Parameter (Instruction Description of Arguments (Instruction & Response to Query Arguments & Qualifier) Command Qualifier) Quad Drop & QDI= 73 bytes Command or Query. QDI= QDI?p QDI=pccddddddddddddd Insert Sets or returns Quad Drop & Insert (QDI) (E1-CCS only) in the form...
Page 371 CDM-425 Advanced Satellite Modem Revision 0 Command Response Query Number of Parameter (Instruction Description of Arguments (Instruction & Response to Query Arguments & Qualifier) Command Qualifier) Bulk Status 29 bytes Query only. BSQ? BSQ=abcccc,ddddd,eefff Query Response in the form abcccc,ddddd,eeffffffggggghhh, where:...
Page 372: Modem Information
CDM-425 Advanced Satellite Modem Revision 0 8.5.6 Modem Information Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Hardware 4 bytes Query only. HRV? HRV=xx.y Revision Returns hardware revision level of both main circuit cards in the form of xx.y, where: (see Description of xx indicates the main (bottom) card;...
Page 373 CDM-425 Advanced Satellite Modem Revision 0 Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Equipment ID 33 bytes Query only. EID? EID=AAAABCDEFGHs Returns the equipment ID and installed options in the form...
Page 374 CDM-425 Advanced Satellite Modem Revision 0 Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) ...Equipment S=D&I option, where: ID (cont.) 0=None 1=D&I,D&I++ for single port E1/T1 2=Option 1 plus Quad D&I (4 ports) T=G.703 Clock Extension, where:...
Page 375 CDM-425 Advanced Satellite Modem Revision 0 Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Equipment ID d=VersaFEC-2 ACM symbol rate option, where: (cont.) 0=Base, up to 1200ksps...
Page 376: Modem Performance Information
CDM-425 Advanced Satellite Modem Revision 0 8.5.7 Modem Performance Information Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Rx Signal 5 bytes Query Only. RSL? RSL=xxxxx Level...
Page 377 CRS-150 is used to indicate a 1:1 set-up; No_Comms=Indicates that a 1kHz signal has been detected, but that there is no (or not yet) a response for the modem; abcdefgh00=The FLT? response information from the offline CDM-425 unit. Faults and 10 bytes...
Page 378 CDM-425 Advanced Satellite Modem Revision 0 Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Faults and b=Tx Traffic status: Status (cont.) 0=Tx traffic OK 1=No clock from terrestrial interface...
Page 379 CDM-425 Advanced Satellite Modem Revision 0 Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) 4 bytes Query only. CRM? CRM=xxxx Ratio Monitor When CnC is enabled and the modem is locked, ratio (in dB) is monitored between the interferer and the (see Description of desired power.
Page 380 CDM-425 Advanced Satellite Modem Revision 0 Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) CnC-APC 4 bytes Query only. AFE? AFE=xxxx Frame Error Returns the value of CnC-APC FER in the form xEc, where:...
Page 381 CDM-425 Advanced Satellite Modem Revision 0 Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) CnC-APC APL= 3 bytes Command or Query. APL= APL? APL=xx.x Max Power CnC-APC maximum power level increase in the form x.x, range from 0.0 thru 9.9 dB, limited by Tx power...
Page 382: Buc Parameters (L-Band Device)
CDM-425 Advanced Satellite Modem Revision 0 8.5.8 BUC Parameters (L-Band Device) Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) BPS= 1 byte, Command or Query. BPS= BPS?
Page 383 CDM-425 Advanced Satellite Modem Revision 0 Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) 4 bytes Query only. BUT? BUT=sxxx Temperature Returns BUCTemperature in the form sxxx, where: (see Description of s=sign (+ or –)
Page 384: Revision 0
CDM-425 Advanced Satellite Modem Revision 0 8.5.9 LNB Parameters (L-Band Device) Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) LPS= 1 byte, Command or Query. LPS= LPS?
Page 385: Ethernet Parameters
Ethernet EGC= Up to 347 bytes Command or Query. EGC= EGC? EGC=1abccccdxxx;2a Global Sets or returns Global Configuration of CDM-425 Ethernet, in the form shown in the Response to Query EGC? EGC?n bccccdxxx;3abccccdx Configuration column, where: EGC* (where n=0 xx;4abccccdxxxDEFF EGC# thru 9.
Page 386 CDM-425 Advanced Satellite Modem Revision 0 Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) WAN Buffer WBL= 3 bytes Command or Query. WBL= WBL? WBL=xxx Length Sets or returns WAN Buffer Length in the form xxx, where:...
Page 387 CDM-425 Advanced Satellite Modem Revision 0 Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Packet PPE= 1 byte, Command or Query. PPE= PPE? PPE=x Processor 0 or 1...
Page 388 CDM-425 Advanced Satellite Modem Revision 0 Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Dedicated DMP= 1 byte, Command or Query. DMP= DMP? DMP=x Management 0 thru 8...
Page 389 CDM-425 Advanced Satellite Modem Revision 0 Command Query Number of Response to Parameter (Instruction Description of Arguments (Instruction Response to Query Arguments Command & Qualifier) & Qualifier) Packet None Query only. VS2? VS2=x Processor Valid only when Packet Processor is installed and Enabled.
Page 390 CDM-425 Advanced Satellite Modem Revision 0 BLANK PAGE Serial Remote Control 8–66 MN-CDM-425...
Page 391: Chapter 9. Telnet Command Line Interface (Cli) Operation
The Telnet Command Line Interface (referred to hereafter as the Telnet CLI or the CLI) is an Ethernet-based user menu system for the CDM-425 Advanced Satellite Modem equipped with an installed and enabled optional IP Packet Processor card. The CLI allows configuration, monitoring and control of the unit using a user-supplied terminal emulator (e.g., PuTTY or Tera Term).
Page 392: Terminal Emulator Considerations
Revision 0 9.1.2 Terminal Emulator Considerations For best results, Comtech EF Data recommends PuTTY or Tera Term as the preferred terminal emulators. Use of the HyperTerminal terminal emulator is not supported or recommended. The numeric keypad’s ENTER key may not work on some terminal emulators.
Page 393 CDM-425 Advanced Satellite Modem Revision 0 Next, log in to the Telnet CLI using a valid Username and Password: • The default Username is: comtech • The default Password is comtech The Telnet CLI Home menu should now be accessible: 1.
Page 394: Tera Term Terminal Emulator
CDM-425 Advanced Satellite Modem Revision 0 9.1.2.2 Tera Term Terminal Emulator First, define your Telnet session connection: • Select TCP/IP; • For Host, enter the interface IP Address (e.g., 192.168.1.11); • For Service, select Telnet; • For TCP port #, enter 107;...
Page 395 CDM-425 Advanced Satellite Modem Revision 0 Next, before you log in, Tera Term requires the following settings on the Setup > Terminal page: • For New-Line[Receive], use the drop-down list to select CR; • For New-Line[Transmit], use the drop-down list to select CR+LF.
Page 396 Revision 0 The Telnet CLI Home menu should now be accessible: In order to use the Telnet CLI to make configuration changes to the CDM-425, Remote Access Mode should always be set to [Ethernet]. Telnet Command Line Interface (CLI) Operation 9–6...
Page 397: Telnet Command Line Interface (Cli)
9.2.1 Telnet CLI Menu System – Parallel Functionality The Telnet CLI allows monitoring, configuration, and control of the CDM-425 Satellite Modem in a manner similar to functionality provided via its front panel menus and the CDM-425 Web Server Interface. See those chapters for more in-depth explanations of operation.
Page 398 CDM-425 Advanced Satellite Modem Revision 0 Note the following: Selection Description Press [ENTER] to accept any updates or changes made on this page – this does not [ENTER]Select save the selection to configuration memory, additional action is required. [ESC] Back Press [ESC] to exit the current menu and return to the parent submenu.
Page 399 CDM-425 Advanced Satellite Modem Revision 0 2. Each dialog windows provides cues to ensure proper configuration of the unit. If you enter an invalid parameter, the CLI rejects the entry and displays an error message at the bottom of the window, as shown in this example: Here, the CLI rejects the attempted entry of 6 and displays the message “Number is out of...
Page 400 CDM-425 Advanced Satellite Modem Revision 0 Use the ← → arrow keys to select an action. Selection Action [Save] Save any changes made to the page to memory [Discard] Exit the page without saving and return to the parent submenu...
Page 401: Command Line Interface Pages - Home (Main) Menu
Access ODU comms, CSAT-5060 configuration submenus (summary 9.3.6 Outdoor Unit (ODU) only) Redundancy Access 1:1 or 1:N redundancy configuration submenu 9.3.7 Enter alphanumeric Circuit ID; view read-only CDM-425 operations 9.3.8 General Information information screens Access Base Modem and Packet Processor stored events and 9.3.9 Logs statistics logs, alarms control submenus 9.3.10...
Page 402: Home > Remote Mode
CDM-425 Advanced Satellite Modem Revision 0 9.3.1 Home > Remote Mode In order to proceed with the operations described through the remaining chapter, you must be sure to set Remote Mode to [Ethernet] in order for configuration changes to be saved into memory.
Page 403: Home > Administration
CDM-425 Advanced Satellite Modem Revision 0 9.3.2 Home > Administration Open the Administration submenu from the Home menu. This submenu contains the following options: Configuration Page Function Sect. Host Access List Configure Host Access List(s) 9.3.2.1 SNMP Configure SNMP parameters and traps 9.3.2.2...
Page 404: Home > Administration > Host Access List
CDM-425 Advanced Satellite Modem Revision 0 9.3.2.1 Home > Administration > Host Access List Open the scrollable Host Access List page from the Administration submenu. This page contains the following options: Dialog Window Function / Option Entry Access List Enforcement Use ↑↓...
Page 405 CDM-425 Advanced Satellite Modem Revision 0 Dialog Window Function / Option Entry Typical for each entry – Enter a value as follows: Access IP 3 Access Network Prefix Range 1 – Enter a value of 0 • Range 2 – Enter a value from 8 to 32 •...
Page 406: Home > Administration > Snmp
CDM-425 Advanced Satellite Modem Revision 0 9.3.2.2 Home > Administration > SNMP Open the SNMP page from the Administration submenu. This page contains the following options: Dialog Window Option Entry Contact Typical for each entry – Enter the desired designations Name Typical for each entry –...
Page 407: Home > Administration > Firmware (Base Modem) Or (Packet Processor)
CDM-425 Advanced Satellite Modem Revision 0 9.3.2.3 Home > Administration > Firmware (Base Modem) or (Packet Processor) Telnet Command Line Interface (CLI) Operation 9–17 MN-CDM-425...
Page 408 CDM-425 Advanced Satellite Modem Revision 0 Open the Base Modem and Packet Processor Firmware pages from the Administration submenu. Use these pages to view the current firmware information, or to select the alternate firmware image to be loaded at startup or reboot. Both pages contain the following option:...
Page 409: Home > Administration > Reboot
9.3.2.4 Home > Administration > Reboot Open the Reboot page from the Administration submenu. Use this page to perform a soft reboot of the CDM-425. Otherwise, press [ESC] to return to the Administration submenu. Dialog Window Option Entry Use the ↑↓ arrow keys to select No (default) or Yes to reboot Force Reboot You must restart your Telnet CLI session upon reboot of the CDM-425.
Page 410: Home > Administration > Fast Options
Demo Mode Use the ↑↓ arrow keys to set Demo Mode as Disabled (default) or Enabled If Enabled, the CDM-425 begins operation in FAST Demo Mode – FAST Options Demo Mode allows access to ALL CDM-425 FAST options for 30 calendar days...
Page 411: Home > Administration > Save Modem Configuration / Load Modem Configuration
CDM-425 Advanced Satellite Modem Revision 0 9.3.2.6 Home > Administration > Save Modem Configuration / Load Modem Configuration Open the Save Modem Configuration and Load Modem Configuration pages from the Administration submenu. Use these pages to save and load up to 10 modem configurations.
Page 412 CDM-425 Advanced Satellite Modem Revision 0 To store (save) a configuration setting: • First, make any desired configuration changes to the modem. • Next, open the Save Modem Configuration window (Home > [A] Administration > [G] Save Modem Configuration). Note the...
Page 413: Home > Administration > Restore Factory Defaults
9.3.2.7 Home > Administration > Restore Factory Defaults Open the Restore Factory Default page from the Administration submenu. Use this page to restore the CDM-425 settings to the original settings as shipped from the factory. Dialog Window Option Entry Use the ↑↓ arrow keys to set as Cancel (default) or Restore Restore Factory Defaults Press [A] to open the Restore Factory Defaults dialog window.
Page 414: Home > Modem
CDM-425 Advanced Satellite Modem Revision 0 9.3.3 Home > Modem Open the Modem submenu from the Home menu. This page contains the following options: Configuration Page Function Sect. Interface Configure the Tx and Rx Framing Modes 9.3.3.1 9.3.3.2 Modem TX Configure the unit’s Tx parameters...
Page 415 CDM-425 Advanced Satellite Modem Revision 0 Configuration Page Function Sect. MEO (Medium Earth Orbit) and its associated functions are not supported in FW Ver. 1..1.1. Its hot key and nested screen, while selectable 9.3.3.10 MEO (Medium Earth Orbit) and viewable, are NON-FUNCTIONAL at this time.
Page 416: Home > Modem > Interface
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.1 Home > Modem > Interface Open the Interface page from the Modem submenu. This page contains the following options: Dialog Window Option Entry Use the ↑↓ arrow keys to select: • G.703B (Balanced) •...
Page 417: Home > Modem > Modem Tx
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.2 Home > Modem > Modem TX Open the Modem TX page from the Modem submenu. This page contains the following options: Dialog Window Option Entry This read-only entry displays: [RO] Tx FEC Type •...
Page 418 CDM-425 Advanced Satellite Modem Revision 0 Dialog Window Option Entry Enter a value as follows: 70/140 MHz: From -99.9 to 99.9 dBm Tx Power Level • L-Band (FAST option) From-40.00 to 0.0 dBm • Typical for either entry – Use the ↑↓ arrow keys to select Normal or Inverted...
Page 419: Home > Modem > Modem Rx
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.3 Home > Modem > Modem RX Open the Modem RX page from the Modem submenu. This page contains the following options: Dialog Window Option Entry This read-only entry displays: [RO] Rx FEC Type •...
Page 420 CDM-425 Advanced Satellite Modem Revision 0 Dialog Window Option Entry This read-only entry displays a value from 18.000 to 25000.000 Ksps [RO] Rx Symbol Rate Symbol Rate applies when in ACM Mode Enter a value as follows: Rx Frequency 70/140 MHz: 50 to 180 MHz •...
Page 421: Home > Modem > Cnc (Carrier-In-Carrier)
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.4 Home > Modem > CnC (Carrier-in-Carrier) Appendix F. D C) OPTION OUBLE ARRIER ARRIER Open the CnC page from the Modem submenu. This page contains the following options: Dialog Window Option Entry Use the ↑↓ arrow keys to select: •...
Page 422: Home > Modem > Acm (Adaptive Coding And Modulation)
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.5 Home > Modem > ACM (Adaptive Coding and Modulation) Appendix K. ADAPTIVE CODING MODULATION (ACM) OPTION Open the ACM page from the Modem submenu. Use this page as a quick reference guide for the Minimum and Maximum Tx ModCod settings.
Page 423: Home > Modem > Versafec-2 Acm
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.6 Home > Modem > VersaFEC-2 ACM Open the VersaFEC-2 ACM page from the Modem submenu. Use this page as a quick reference guide for the Maximum Tx ModCod settings. This submenu contains the following options:...
Page 424: Home > Modem > D&I
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.7 Home > Modem > D&I Appendix E. CLOCK MODES DROP INSERT (D&I) Open the D&I page from the Modem submenu. This page contains the following options: Dialog Window Option Entry Drop Type Typical for either entry – Use the ↑↓ arrow keys to select T1D4, T1...
Page 425: Home > Modem > D&I > D&I Table
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.7.1 Home > Modem > D&I > D&I Table CHAPTER 8. SERIAL-BASED REMOTE PRODUCT MANAGEMENT From the D&I page, press [E] (D&I Table), [F] (D&I++ Table ), or [G] (D&I Quad Table) to continue.
Page 426 CDM-425 Advanced Satellite Modem Revision 0 Hot Key [F] – D&I++ Table The D&I++ Table dialog window shows the current value for the table. To edit the table value, press A, and then enter a new value*. Press [ENTER] to accept the change or [ESC] to return to the D&I dialog window.
Page 427: Home > Modem > Buc
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.8 Home > Modem > BUC Open the BUC page from the Modem submenu. This page features a read-only status section for the installed device and contains the following options: Dialog Window Option Entry BUC DC Power Use the ↑↓...
Page 428: Home > Modem > Lnb
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.9 Home > Modem > LNB Open the LNB page from the Modem submenu. This page provides a read-only status section for the installed device and contains the following options: Dialog Window Option Entry Use the ↑↓...
Page 429: 9.3.3.10 Home > Modem > Meo
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.10 Home > Modem > MEO Open the MEO page from the Modem submenu. This page provides a read-only status section for the installed device and contains the following options: Dialog Window Option Entry Use the ↑↓...
Page 430: 9.3.3.11 Home > Modem > Utilities
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.11 Home > Modem > Utilities Appendix D. CARRIER ID (DVB-CID M ®) ARRIER Telnet Command Line Interface (CLI) Operation 9–40 MN-CDM-425...
Page 431 CDM-425 Advanced Satellite Modem Revision 0 Open the scrollable Utilities page from the Modem submenu. This page contains the following options: Hot Key Dialog Window Option Entry Unit Test Mode Use the ↑↓ arrow keys to select • Normal • Tx CW •...
Page 432 CDM-425 Advanced Satellite Modem Revision 0 Hot Key Dialog Window Option Entry Typical for either entry – Use the ↑↓ arrow keys to select: BERT Tx Pattern • BERT Pattern Space • BERT Pattern Mark • BERT Pattern 11 • BERT Pattern 12 •...
Page 433: 9.3.3.12 Home > Modem > Overhead
CDM-425 Advanced Satellite Modem Revision 0 9.3.3.12 Home > Modem > Overhead Open the scrollable Overhead page from the Modem submenu. This page contains the following options: Dialog Window Option Entry Use the ↑↓ arrow keys to select Disable or Enable...
Page 434: Home > Network Submenu
CDM-425 Advanced Satellite Modem Revision 0 9.3.4 Home > Network Submenu Open the Network submenu from the Home menu. This submenu contains the following options: Configuration Page Function Sect. Ethernet Ports Configure Ethernet Ports 1 through 4 9.3.4.1 Configure Ethernet Framing, IP addresses, QoS, Working LAN IP 9.3.4.2...
Page 435 CDM-425 Advanced Satellite Modem Revision 0 Configuration Page Function Sect. Configure use and review status of PTP (Precision Time 9.3.4.10 Protocol) feature Configure use of SNTP (Simple Network Time Protocol) SNTP 9.3.4.11 feature, set RTC (Real Time Clock) time and date...
Page 436: Home > Network > Ethernet Ports
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.1 Home > Network > Ethernet Ports Open the scrollable Ethernet Ports page from the Network submenu. This page lists the current configuration settings for Ethernet Ports 1 through 4. Use the ↑↓ arrow keys to select <Ethernet Port 1>,or <Ethernet Port 2>, and then press [ENTER] to continue.
Page 437: Home > Network > Ethernet Ports > Ethernet Port
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.1.1 Home > Network > Ethernet Ports > Ethernet Port # Open the nested Ethernet Port 1 through Ethernet Port 4 pages from the scrollable Home > Network> Ethernet Ports page. Each page contains the following options:...
Page 438: Home > Network > Lan Ip
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.2 Home > Network > LAN IP Open the LAN IP page from the Network submenu. This page contains the following options: Dialog Window Option Entry Use the ↑↓ arrow keys to select Disabled or Enabled...
Page 439: Home > Network > Lan Arp
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.3 Home > Network > LAN ARP Open the LAN ARP page from the Network submenu. This page contains the following options: Dialog Window Option Entry Use the ↑↓ arrow keys to select a table – see Sect. 9.3.4.3.1.
Page 440: Home > Network > Lan Arp > Arp Table > Arp Entry
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.3.1 Home > Network > LAN ARP > Arp Table > Arp Entry # Open the ARP Table from the nested ARP submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <ARP Entry 1>) and press [ENTER] to view, in a standalone window, a specific ARP Entry page as shown in this example: This window displays the ARP Type for the specific ARP Entry #.
Page 441: Home > Network > Vlan
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.4 Home > Network > VLAN Open the VLAN submenu from the Network submenu. This submenu contains the following options: Dialog Window Option Entry VLAN Table Use the ↑↓ arrow keys to select a table – see Sect. 9.3.4.3.1 VLAN Mode Enable Use the ↑↓...
Page 442: Home > Network > Vlan > Vlan Table > Vlan
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.4.1 Home > Network > VLAN > VLAN Table > VLAN # Open the VLAN Table from the nested VLAN submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <VLAN 1>) and press [ENTER] to view,...
Page 443: Home > Network > Routes
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.5 Home > Network > Routes Open the Routes page from the Network submenu. This page contains the following options: Dialog Window Option Entry Route Table Use the ↑↓ arrow keys to select an index – see Sect. 9.3.4.5.1 Use the ↑↓...
Page 444: Home > Network > Routes > Route Table
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.5.1 Home > Network > Routes > Route Table Open the Route Table from the nested Routes submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Index 1>) and press [ENTER] to view,...
Page 445: Home > Network > Managed Switch
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.6 Home > Network > Managed Switch Open the Managed Switch page from the Network submenu. This page contains the following options: Dialog Window Option Entry Use the ↑↓ arrow keys to select Disable, Layer 2 Only, or Layer...
Page 446: Home > Network > Igmp
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.7 Home > Network > IGMP Open the IGMP page from the Network submenu. This page contains the following options: Dialog Window Option Entry Lists the IGMP Groups that are active on the modem. If none IGMP Joined Groups exist, this window displays the message <No IGMP Groups>...
Page 447: Home > Network > Dns
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.8 Home > Network > DNS Open the DNS Caching page from the Network submenu. This page contains the following options: Dialog Window Option Entry DNS Caching Feature Use the ↑↓ arrow keys to select Disable or Enable DNS Caching Flush Use the ↑↓...
Page 448: Home > Network > Dhcp
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.9 Home > Network > DHCP Open the DHCP Relay page from the Network submenu. This page contains the following options: Dialog Window Option Entry Use the ↑↓ arrow keys to select Disable or Enable DHCP Relay Feature Enter an IP Address in the form XXX.XXX.XXX.XXX...
Page 449: 9.3.4.10 Home > Network > Ptp
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.10 Home > Network > PTP Open the PTP page from the Network submenu. This page contains the following options: Dialog Window Option Entry PTP Feature Use the ↑↓ arrow keys to select Disable or Enable PTP Grandmaster Use the ↑↓...
Page 450: 9.3.4.11 Home > Network > Sntp
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.11 Home > Network > SNTP Open the SNTP page from the Network submenu. This page contains the following options: Dialog Window Option Entry SNTP Enable Use the ↑↓ arrow keys to select Disabled or Enabled SNTP Primary Server Typical for either entry –...
Page 451: 9.3.4.12 Home > Network > Mac Table
CDM-425 Advanced Satellite Modem Revision 0 9.3.4.12 Home > Network > MAC Table Open the MAC Table page from the Network submenu. Use this page to review status information on the recognized MAC Addresses. Use the ↑↓ arrow keys to scroll through the available indices. You may also press [ENTER] to select, and then view in a standalone window, a specific Index entry.
Page 452: Home > Wan
CDM-425 Advanced Satellite Modem Revision 0 9.3.5 Home > WAN Open the WAN submenu from the Home menu. This page contains the following options: Configuration Page Function Sect. Configure Quality of Service operation Compression Configure Router Mode compression refresh rates 9.3.5.2...
Page 453: Home > Wan > Qos
CDM-425 Advanced Satellite Modem Revision 0 9.3.5.1 Home > WAN > QoS Open the QoS submenu from the WAN submenu. The appearance of this page changes with the selected Advanced QoS mode (see Sect. 9.3.4.2 Home > Network > LAN IP).
Page 454: Home > Wan > Qos > Max-Pri / Min-Max Table
CDM-425 Advanced Satellite Modem Revision 0 9.3.5.1.1 Home > WAN > QoS > Max-Pri / Min-Max Table Open the scrollable QoS Table (Max-Pri / Min-Max Table) from the QoS submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Index 1>) and press [ENTER] to view, in a standalone window, a specific set of statistics as...
Page 455: Home > Wan > Qos > Qos Differentiated Services Table
CDM-425 Advanced Satellite Modem Revision 0 9.3.5.1.2 Home > WAN > QoS > QoS Differentiated Services Table Open the nested QoS Differentiated Services page from the QoS submenu. This page contains the following options: Dialog Window Option Entry AF4 Service Rate AF3 Service Rate Typical for each entry –...
Page 456: Home > Wan > Compression
CDM-425 Advanced Satellite Modem Revision 0 9.3.5.2 Home > WAN > Compression Open the Compression page from the WAN submenu. This page contains the following options: Dialog Window Option Entry Header Comp RTP Refresh Rate Enter a value from 1 to 600...
Page 457: Home >Wan > Encryption
CDM-425 Advanced Satellite Modem Revision 0 9.3.5.3 Home >WAN > Encryption Open the Encryption page from the WAN submenu. This page contains the following options: Dialog Window Option Entry Allow Unencrypted Rx Use the ↑↓ arrow keys to select Drop or Allow Use the ↑↓...
Page 458 CDM-425 Advanced Satellite Modem Revision 0 Dialog Window Option Entry Encryption Key 8 Decryption Key 1 Decryption Key 2 Typical for each key entry – Enter a 32-character decryption code Decryption Key 3 Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the WAN submenu.
Page 459: Home > Outdoor Unit (Odu)
9.3.6 Home > Outdoor Unit (ODU) 1. After configuring the CDM-425 for 70/140 MHz operation, and then enabling ODU Comms, you may use the Telnet CLI ‘ODU (Outdoor Unit)’ submenus and pages to control and monitor a CSAT-5060 Outdoor Unit that is connected via FSK to the CDM-425.
Page 460: Home > Redundancy
CDM-425 Advanced Satellite Modem Revision 0 9.3.7 Home > Redundancy Open the Redundancy submenu from the Home menu. This submenu additionally displays the status of the redundant modem setup. The redundant modem operation options are as follows: Dialog Window Option Entry Traffic IP Address Enter an IP address in the form XXX.XXX.XXX.XXX...
Page 461: Home > General Information
CDM-425 Advanced Satellite Modem Revision 0 9.3.8 Home > General Information Open the General Information submenu from the Home menu. This submenu contains the following options: Information Page Sect. 9.3.8.1 Modem Status Modem Information 9.3.8.2 MAC Table 9.3.8.3 9.3.8.4 Block Upconverter (BUC) 9.3.8.5...
Page 462: Home > General Information > Modem Status
CDM-425 Advanced Satellite Modem Revision 0 9.3.8.1 Home > General Information > Modem Status Press [ESC] to return to the General Information submenu. Telnet Command Line Interface (CLI) Operation 9–72 MN-CDM-425...
Page 463: Home > General Information > Modem Information
CDM-425 Advanced Satellite Modem Revision 0 9.3.8.2 Home > General Information > Modem Information Open the Modem Information page from the General Information submenu. This page contains the following option: Dialog Window Option Entry Circuit ID Enter an identifying label for the modem Press the hot key to open the dialog window.
Page 464: Home > General Information > Mac Table
CDM-425 Advanced Satellite Modem Revision 0 9.3.8.3 Home > General Information > MAC Table Press [ESC] to return to the General Information submenu. Telnet Command Line Interface (CLI) Operation 9–74 MN-CDM-425...
Page 465: Home > General Information > Block Upconverter (Buc)
CDM-425 Advanced Satellite Modem Revision 0 9.3.8.4 Home > General Information > Block Upconverter (BUC) Press [ESC] to return to the General Information submenu. 9.3.8.5 Home > General Information > Low Noise Block Downconverter (LNB) Press [ESC] to return to the General Information submenu.
Page 466: Home > Logs
CDM-425 Advanced Satellite Modem Revision 0 9.3.9 Home > Logs Open the Logs submenu from the Home menu. This page contains the following options: Dialog Window Sect. Base Modem 9.3.9.1 Packet Processor 9.3.9.2 Press a hot key to access a submenu. See the specified chapter section for further information.
Page 467: Home > Logs > Base Modem
CDM-425 Advanced Satellite Modem Revision 0 9.3.9.1 Home > Logs > Base Modem Open the Base Modem page from the Logs submenu. This page contains the following options: Dialog Window Option Entry Stored Event Table See Sect. 9.3.9.1.1 Stored Statistic Table See Sect.
Page 468: Home > Logs > Base Modem > Stored Event Table
CDM-425 Advanced Satellite Modem Revision 0 9.3.9.1.1 Home > Logs > Base Modem > Stored Event Table Open the scrollable Stored Event Table from the Base Modem page. Use the ↑↓ arrow keys to scroll through the available entries. The date, time, and description are provided for each event.
Page 469: Home > Logs > Base Modem > Stored Statistic Table
CDM-425 Advanced Satellite Modem Revision 0 9.3.9.1.2 Home > Logs > Base Modem > Stored Statistic Table An Eb No value of 99.9 dB means “signal loss.” Open the scrollable Stored Statistic Table from the Base Modem page. Use the ↑↓ arrow keys to scroll through the available entries.
Page 470: Home > Logs > Packet Processor
CDM-425 Advanced Satellite Modem Revision 0 9.3.9.2 Home > Logs > Packet Processor Open the Packet Processor page from the Logs submenu. This page contains the following options: Page / Dialog Window Description / Option Entry See Sect. 9.3.9.2.1 Stored Event Table Logging Use the ↑↓...
Page 471: Home > Logs > Packet Processor > Stored Event Table
CDM-425 Advanced Satellite Modem Revision 0 9.3.9.2.1 Home > Logs > Packet Processor > Stored Event Table Open the scrollable Stored Event Table from the Packet Processor page. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Event 1>) and press...
Page 472: Home > Statistics
CDM-425 Advanced Satellite Modem Revision 0 9.3.10 Home > Statistics The Telnet CLI Statistics submenu provides access to a number of read-only informational pages. Most page submenus provide a dialog window that affords you the option to reset (clear) the counters for that specific page.
Page 473: 9.3.10.1 Home > Statistics > Ethernet Submenu
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.1 Home > Statistics > Ethernet Submenu Open the nested Ethernet submenu from the Statistics submenu: Page / Dialog Window Description / Option Entry Rx Statistics See Sect. 9.3.10.1.1 See Sect. 9.3.10.1.2 Tx Statistics See Sect.
Page 474: Home > Statistics > Ethernet > Rx
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.1.1 Home > Statistics > Ethernet > Rx Open the scrollable Rx statistics page from the nested Ethernet submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Port 1>) and press [ENTER] to view, in a standalone window, a specific set of statistics as shown in this example: Press [ESC] to return to the nested Ethernet submenu.
Page 475: Home > Statistics > Ethernet > Tx
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.1.2 Home > Statistics > Ethernet > Tx Open the scrollable Tx statistics page from the nested Ethernet submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Port 1>) and press [ENTER] to view, in a standalone window, a specific set of statistics as shown in this example: Press [ESC] to return to the nested Ethernet submenu.
Page 476: Home > Statistics > Ethernet > Errors
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.1.3 Home > Statistics > Ethernet > Errors Open the scrollable Error statistics page from the nested Ethernet submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Port 1>) and...
Page 477: 9.3.10.2 Home > Statistics > Router
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.2 Home > Statistics > Router Open the Router statistics page from the Statistics submenu: Dialog Window Option Entry Router Clear Stats Use the ↑↓ arrow keys to select Cancel or Clear Press the hot key to open the dialog window. Otherwise, press [ESC] to return to the Statistics submenu.
Page 478: 9.3.10.3 Home > Statistics > Managed Switch
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.3 Home > Statistics > Managed Switch Open the Managed Switch statistics page from the Statistics submenu: Dialog Window Option Entry Router Clear Stats Use the ↑↓ arrow keys to select Cancel or Clear Press the hot key to open the dialog window.
Page 479: Home > Statistics > Wan (Router Mode)
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.4 Home > Statistics > WAN (Router Mode) Open the scrollable WAN (Router Mode) statistics page from the Statistics submenu. Otherwise, press [ESC] to return to the Statistics submenu. Telnet Command Line Interface (CLI) Operation 9–89...
Page 480: Home > Statistics > Wan (Managed Switch Mode)
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.5 Home > Statistics > WAN (Managed Switch Mode) Open the scrollable WAN (Managed Switch Mode) statistics page from the Statistics submenu: Dialog Window Option Entry Use the ↑↓ arrow keys to select Cancel or Clear Clear Stats Press the hot key to open the dialog window.
Page 481: 9.3.10.6 Home > Statistics > Compression
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.6 Home > Statistics > Compression Open the Compression statistics page from the Statistics submenu: Page / Dialog Window Option Entry / Description Use the ↑↓ arrow keys to select Cancel or Clear Compression Clear Counters View Statistics Table See Sect.
Page 482: Home > Statistics > Compression > Table View
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.6.1 Home > Statistics > Compression > Table View Open the scrollable Compression statistics table from the nested Compression submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <Route Index 1>) and press [ENTER] to view, in a standalone window, a specific set of statistics...
Page 483: 9.3.10.7 Home > Statistics > Qos
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.7 Home > Statistics > QoS Open the QoS statistics page from the Statistics submenu: Page / Dialog Window Option Entry / Description Use the ↑↓ arrow keys to select Cancel or Clear QoS Clear Counters View Statistics Table See Sect.
Page 484: Home > Statistics > Qos > Table View
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.7.1 Home > Statistics > QoS > Table View Open the scrollable QoS statistics table from the nested QoS submenu. Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header (e.g., <QoS Index 1>) and press [ENTER] to view, in a standalone window, a specific set of statistics...
Page 485: 9.3.10.8 Home > Statistics > Ptp
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.8 Home > Statistics > PTP Open the PTP statistics page from the Statistics submenu: Page Description See Sect. 9.3.10.8.1 LAN Details WAN Details See Sect. 9.3.10.8.2 Press a hot key to view a statistics page. Otherwise, press [ESC] to return to the Statistics submenu.
Page 486: Home > Statistics > Ptp > Lan Details
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.8.1 Home > Statistics > PTP > LAN Details Open the LAN Details statistics page from the PTP page. Otherwise, press [ESC] to return to the PTP page. Telnet Command Line Interface (CLI) Operation 9–96...
Page 487: Home > Statistics > Ptp > Wan Details
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.8.2 Home > Statistics > PTP > WAN Details Open the WAN Details statistics page from the PTP page. Otherwise, press [ESC] to return to the PTP page. Telnet Command Line Interface (CLI) Operation 9–97...
Page 488: 9.3.10.9 Home > Statistics > Cpu
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.9 Home > Statistics > CPU Open the CPU statistics page from the Statistics submenu. Otherwise, press [ESC] to return to the Statistics submenu. Telnet Command Line Interface (CLI) Operation 9–98 MN-CDM-425...
Page 489: Home > Statistics > Clear All Counters
CDM-425 Advanced Satellite Modem Revision 0 9.3.10.10 Home > Statistics > Clear All Counters Open the Clear All Counters page from the Statistics submenu: Dialog Window Option Entry Clear All Counters Use the ↑↓ arrow keys to select Cancel or Clear Press the hot key to open the dialog window.
Page 490: Home > Contact
CDM-425 Advanced Satellite Modem Revision 0 9.3.11 Home > Contact For all product support, please call: +1.240.243.1880 (outside USA and Canada) +1.866.472.3963 (toll free USA and Canada) Or email at esc@comtechefdata.com Telnet Command Line Interface (CLI) Operation 9–100 MN-CDM-425...
Page 491: Chapter 10. Outdoor Unit (Odu) (Transceiver, Buc, And Lnb) Operation
• KST-2000B (LNB) Ku-Band Satellite Transceiver Under L-Band operation, ODU refers to use of a Comtech EF Data LPOD Outdoor Amplifier / Block Up Converter (BUC), or an LNB (Low-Noise Block Down Converter). For either 70/140 MHz or L-Band operation, you may fully monitor and control ODU operations in the following ways: •...
Page 492: 10.2 Odu Remote Control Address Setup
• Appendix H. EDMAC CHANNEL The ODU, as connected to a CDM-425 through FSK (Frequency Shift Keying), can be remotely monitored and controlled through the use of ODU commands and queries issued via serial remote control or with the Telnet Command Line Interface (CLI).
Page 493: 10.3 Odu Operations Via The Front Panel
Use the front panel keypad and Vacuum Fluorescent Display (VFD) to configure, monitor, and control ODU operation. See Chapter 6. FRONT PANEL OPERATION. See this chapter for an in- depth explanation of the function and operation of the CDM-425 Advanced Satellite Modem front panel.
Page 494: Front Panel Menus - Odu Menu Hierarchy
Figure 10-1 identifies the front panel menu hierarchies allocated to the configuration, monitor, and control of a Comtech EF Data ODU. More specifically, menu branches that incorporate ODU operations are shown in bold; menu content that is dedicated to ODU operations is additionally italicized.
Page 495: Select: (Main) Menu Overview
6.2.8 (Fully Accessible System Topology) Use to configure available options – e.g., extended data rates, interfaces, etc. Contact Comtech EF Data Product Support for details. From the top SELECT: menu, use the ◄ ►arrow keys to select Configuration or ODU, and then press ENTER.
Page 496: 10.3.3.1 (Select: Configuration) Menu Branches
CDM-425 Advanced Satellite Modem Revision 0 10.3.3.1 (SELECT: CONFIGURATION) Menu Branches CONFIG: Mode Clocks D&I/ACM EDMAC Misc Mask Remote () Use the ◄ ►arrow keys to select Tx, Rx, or Mask, and then press ENTER. CONFIG: Tx  Freq and CONFIG: Rx  Freq Submenus 10.3.3.1.1...
Page 497 CDM-425 Advanced Satellite Modem Revision 0 10.3.3.1.2.1 CONFIG: Mask  BUC BUC alarm = Active (Active,Mask) Attach to Tx alarm = No (Yes,No)() When using L-Band, a Block Up Converter (BUC) may be included in the system. A ‘smart’ BUC may be monitored and/or controlled via the modem via FSK (Frequency-Shift Keying control).
Page 498 CDM-425 Advanced Satellite Modem Revision 0 10.3.3.1.2.2 CONFIG: Mask  LNB LNB alarm = Active (Active,Mask) Attach to Rx alarm = No (Yes,No)() When using L-Band, a Low-Noise Block Down Converter (LNB) may be included in the system. It cannot be monitored and/or controlled by the modem, except for the power supply values.
Page 499: 10.3.3.2 (Select: Monitor) Live-Alarms Menu
CDM-425 Advanced Satellite Modem Revision 0 10.3.3.2 (SELECT: MONITOR) Live-Alarms Menu Live Unit=None Net=None Alarms Rx=Demod Lock Tx=No Clock () Live BUC=None Alarms LNB=None () Six alarm types are provided across two screens. The last two alarm types (on the second screen) pertain to ODU operation as shown in the preceding examples.
Page 500: 10.3.3.3 (Select:) Odu Menu Branches
CDM-425 Advanced Satellite Modem Revision 0 10.3.3.3 (SELECT:) ODU Menu Branches ODU: BUC:PwrSupply+Ref LNB:PwrSupply+Ref FSK-control () Use the ◄ ►arrow keys to select BUC:PwrSupply+Ref, LNB:PwrSupply+Ref, or FSK-control, and then press ENTER: ODU Menu Branch Sect. Nested Menu Function Provides menus to enter a Tx LO frequency, and to control a 10MHz BUC:PwrSupply+Ref 10.3.3.3.1...
Page 501 CDM-425 Advanced Satellite Modem Revision 0 Use the ◄ ►arrow keys to select BUC Supply, 10MHz-ref, or Alarm Limits, and then use the ▲▼ arrow keys to select a setting: Selection Setting BUC Supply Indicates installation state, e.g., N/I =- Not Installed.
Page 502: Odu: Lnb:pwrsupply+Ref (Power Supply And Reference)
CDM-425 Advanced Satellite Modem Revision 0 10.3.3.3.2 ODU: LNB:PwrSupply+Ref (Power Supply and Reference) LNB control/monitor: PSU-and-10MHz LO-freq PSUmonitor () The modem can supply DC power to an LNB connected to the Type ‘N’ rear panel Rx connector. It can also supply a 10 MHz reference for a phase-locked LNB. Use the ◄ ►arrow keys to select PSU-and-10MHz, LO-freq, or PSUmonitor, and then press ENTER.
Page 503: Odu: Fsk-Control
The appearance of the ODU: FSK-control screen adjusts automatically to the mode of operation: 70/140 MHz or L-Band. When the Tx frequency is 70/140 MHz – Communication with a Comtech EF Data CSAT or KST transceiver is achieved using a low-speed, half-duplex FSK link over the Rx IF port, with a carrier frequency around 2.7 MHz.
Page 504 CDM-425 Advanced Satellite Modem Revision 0 To enable FSK, on the top line use the ◄ ►arrow keys to select FSK, and then use the ▲▼ arrow keys to set control as On. Press ENTER when done. Once FSK is enabled, the modem attempts to communicate with the installed transceiver(s).
Page 505 CDM-425 Advanced Satellite Modem Revision 0 Sect. 10.3.3.3.3.4 ODU: FSK-control  BUC 10.3.3.3.3.1 ODU: FSK-control  CSAT The CSAT menus that follow assume that you have already selected, and the system has identified, a (standalone) CSAT connected via the rear panel Rx IF port.
Page 506 CDM-425 Advanced Satellite Modem Revision 0     10.3.3.3.3.1.1.1 ODU: FSK-control CSAT (2CSATs CSAT #X) Configuration Tx: Fq=6247.0 MHz Att=23.00 dB Amp=On Mute=Unmuted Slope: xxx, Cal () Use the ◄ ►arrow keys to select a setting, and then use the ▲▼ arrow keys to change that...
Page 507 CDM-425 Advanced Satellite Modem Revision 0     10.3.3.3.3.1.1.3 ODU: FSK-control CSAT (2CSATs CSAT #X) Configuration LNA: State=On Calibrate-LNA-Current=N Current-Window=50% Fault-Logic=Summary Use the ◄ ►arrow keys to select a setting, and then use the ▲▼ arrow keys to change that...
Page 508 CDM-425 Advanced Satellite Modem Revision 0     10.3.3.3.3.1.1.4 ODU: FSK-control CSAT (2CSATs CSAT #X) Configuration Misc Misc: Cold-Start=Disabled AFR=Enable Xref=No Ref-Adj=087 Sync-Clk=Y () Use the ◄ ►arrow keys to select a setting, and then use the ▲▼ arrow keys to change that...
Page 509 CDM-425 Advanced Satellite Modem Revision 0 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Monitor  Tx Tx: SynTune = 09.6 VDC Power = <24 dBm IFLO = 11.1 VDC Temp = 26 C ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Monitor  Rx Rx: SynTuneE = 01.4 VDC...
Page 510 CDM-425 Advanced Satellite Modem Revision 0     10.3.3.3.3.1.3.2 ODU: FSK-control CSAT (2CSATs CSAT #X) Alarms Stored-Alarms As stored events are compiled, the screen shows: Reading Stored Faults..Please Wait Once the events are compiled, the Stored Alarms screen appears as shown here:...
Page 511 CDM-425 Advanced Satellite Modem Revision 0 10.3.3.3.3.1.4 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Info Info: Model Misc () These read-only screens provide the ODU’s current configuration information without risking inadvertent changes. Use the ◄ ►arrow keys to select Model, Tx, Rx, Misc, or LNA, and then press ENTER.
Page 512 CDM-425 Advanced Satellite Modem Revision 0 Use this screen to view the Cold Start and Auto Fault Recovery settings. ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Info  LNA Info: LNA:Off Fault-Logic:Summary Window:48% (EC) Use this screen to view the Low Noise Amplifier operational settings.
Page 513 CDM-425 Advanced Satellite Modem Revision 0 10.3.3.3.3.2.2 ODU: FSK-control  2CSATs  Redundancy-Box Red: Online: ODU2 Mode:Auto Switch:N TxSw:OK RxSw:OK 5V:5.0 12V:12.0 This menu provides operating mode and switchover controls. You may also view the following read-only information here: •...
Page 514 CDM-425 Advanced Satellite Modem Revision 0    10.3.3.3.3.3.1.1 ODU: FSK-control Configuration Tx:Off Freq=13955 MHz Att=23 dB AGC=Off () Use the ◄ ►arrow keys to select Tx, Freq, Att, or AGC, and then use the ▲▼ arrow keys to change that setting.
Page 515 CDM-425 Advanced Satellite Modem Revision 0   10.3.3.3.3.3.1.4 ODU: FSK-control Information KST Info: Model Tx+Rx-Param Misc Numbers () These read-only screens provide the ODU’s current configuration information without risking inadvertent changes. Use the ◄ ►arrow keys to select Model, Tx+Rx-Param, Misc, or Numbers, and then press ENTER.
Page 516 CDM-425 Advanced Satellite Modem Revision 0   10.3.3.3.3.3.1.9 ODU: FSK-control Alarms Current Status: Up:OK Ref:OK AGC:OK P-Supplies:OK Dn:OK HPA:OK LNA:OK This is Summary Status information. Use the ◄ ►arrow keys to select Up, Ref, AGC, Power- Supplies, Down, HPA, or LNA, and then press ENTER. A detailed status screen, similar to the...
Page 517 CDM-425 Advanced Satellite Modem Revision 0 10.3.3.3.3.4 ODU: FSK-control  BUC The menus that follow assume that you have selected and the system has identified a BUC connected via the Tx IF port. BUC controls via FSK: Configuration Status Advanced-FSK () Use the ◄...
Page 518 CDM-425 Advanced Satellite Modem Revision 0     10.3.3.3.3.4.3.1 ODU: FSK-control Advanced-FSK LPOD (2LPODs Online/Offline LPOD) LPOD S/N: 123456789 Cnfg Monitor Alarms Stats Info Redun () This submenu and its nested menus are identical in form and function for the following menu structures: ...
Page 519 CDM-425 Advanced Satellite Modem Revision 0 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs  Online/Offline LPOD) Cnfg  LNB LNB Current: Src=On SwitchBiasTee=Thru Window:30% Alarm=Disabled Cal=No() Use the ◄ ►arrow keys to select a setting, and then use the ▲▼ arrow keys to edit the setting:...
Page 520 CDM-425 Advanced Satellite Modem Revision 0 Use the ◄ ►arrow keys to select a setting, and then use the ▲▼ arrow keys to edit the setting: Selection Setting (Auto Fault Recovery) This defines how a LPOD reacts to momentary fault conditions: Disable –...
Page 521 CDM-425 Advanced Satellite Modem Revision 0 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs  Online/Offline LPOD)  Monitor Temperature Temperature: Heat Sink=048.0°C External Air=030.0°C ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs  Online/Offline LPOD)  Monitor  FETs RF Power FETs Total = 20.301 Amps...
Page 522 CDM-425 Advanced Satellite Modem Revision 0 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs  Online/ Offline LPOD)  Alarms  Current-Alarms P24V1=OK P24V2=OK LNBVT=OK P13VT=OK P10V1=OK A10V1=OK A10V2=OK P7V8T=OK () Use the ▲▼ arrow keys to view additional Current Alarm status screens. Press ENTER or CLEAR to return to the previous menu.
Page 523 CDM-425 Advanced Satellite Modem Revision 0 Each entry provides the following information: Item Comments Info (Information) • Entry Type Fault • Clear (fault cleared) • Entry Number 001 through 511 European Day-Month-Year (DD-MM-YY) format Date Hour:Minute:Second (HH:MM:SS) format Time Description of the Example: Info –...
Page 524 CDM-425 Advanced Satellite Modem Revision 0 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs Online/Offline LPOD)  Statistics  Stored-Statistics To enable statistics logging, see the LPOD  Statistics: Config menu. As statistics are compiled, the Stored-Statistics screen appears as shown here: Reading Stored Stats..
Page 525 CDM-425 Advanced Satellite Modem Revision 0 10.3.3.3.3.4.3.1.5 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs Online/Offline LPOD) Information Info: Model Mask Misc () These read-only screens provide you with the ODU’s current configuration information without risking inadvertent changes. Use the ◄ ►arrow keys to select Model, AMP, LNB, Mask, or Misc, and then press ENTER.
Page 526 CDM-425 Advanced Satellite Modem Revision 0 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs  Online/Offline LPOD) Information  Mask Mask: LFRFPwr=Masked ERLD=Masked FanSpd=Alarm LNBCD=Alarm LNB22V=Alarm This screen displays the LPOD mask settings. ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs ...
Page 527 CDM-425 Advanced Satellite Modem Revision 0 ODU: FSK-control  BUC  Advanced-FSK  2LPODs The menus that follow assume that you have selected, and the system has identified, two LPODs connected via the Tx IF port. 1:1 Monitor & Control...
Page 528: 10.4 Odu Operations Via The Cdm-425 Http (Web Server) Interface
Type the CDM-425’s IP Address into the Address area of the user-supplied web browser, and then enter a valid User Name and Password is accepted. You will see the CDM-425 Web Server Interface “splash” page (Figure 10-2). Note that the Base Modem and Packet Processor Firmware Versions shown in this example are subject to change.
Page 529 CDM-425 Advanced Satellite Modem Revision 0 Tabs not specific to ODU operation appear dimmed and are explicitly defined in Chapter 7. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT. Click a navigation tab to continue. Pages marked with double asterisks (**) are operable only when BUCs or LNBs are installed.
Page 530: Configuration | Buc (Block Up Converter)
CDM-425 Advanced Satellite Modem Revision 0 10.4.2 Web Page Descriptions 10.4.2.1 Configuration | BUC (Block Up Converter) When a Block Up Converter (BUC) is available, use this page to configure its operating settings and to view the BUC status for L-Band operation.
Page 531: Configuration | Lnb (Low Noise Block Down Converter)
CDM-425 Advanced Satellite Modem Revision 0 10.4.2.2 Configuration | LNB (Low Noise Block Down Converter) When a Low Noise Block Down Converter (LNB) is available, use this page to configure its operating settings and to view the LNB status for L-Band operation.
Page 532: 10.4.2.3 Status | Modem Logs | Base Modem
CDM-425 Advanced Satellite Modem Revision 0 10.4.2.3 Status | Modem Logs | Base Modem Use this page to control how the CDM-425 processes ODU faults and alarms. Figure 10-6. Status | Modem Logs | Base Modem Page Events Log •...
Page 533 CDM-425 Advanced Satellite Modem Revision 0 Statistics Log • Read Next Five Statistics – Click to buffer the next group of five stored events into the scrollable statistics window. • Clear Statistics Log – Click to wipe clean the stored statistics log.
Page 534: Odu
‘ODU | Config’, ‘ODU | Status’, and ‘ODU | Utilities’ pages is attempted, the following error message displays: When you configure the CDM-425 for L-Band operation, use the ‘ODU | Enable’ page to enable FSK operation for BUC products. Select the Enable, Config, Status, or Utilities tab to continue.
Page 535: Odu | Config
Use the drop-down list to select ODU operation as Disabled or Enabled, and then click [Submit]. If you encounter a communications issue – e.g., an ODU is either physically not present or the ODU Comms cable is not connected to the CDM-425 – the following error page displays after clicking [Submit]: Figure 10-8.
Page 536 CDM-425 Advanced Satellite Modem Revision 0 10.4.2.4.2.1 ODU | Config (CSAT-5060) Figure 10-10 shows the ‘ODU | Config’ page as it appears with you configure the Comtech EF Data CSAT-5060 as the ODU. Use this page to configure the primary ODU’s Transmit and Receive Parameters.
Page 537 CDM-425 Advanced Satellite Modem Revision 0 Down Converter Parameters • Frequency – Enter a value in MHz. • Attenuation – Enter a value in dB. • Slope Mode – From the drop-down list, select Manual or Calibrated. • Slope Adjust (Manual Mode Only) – Select the desired setting from the drop-down list.
Page 538 CDM-425 Advanced Satellite Modem Revision 0 10.4.2.4.2.2 ODU | Config (KST-2000A/B) Figure 10-11 shows the ‘ODU | Config’ page as it appears when you configure the Comtech EF Data KST-2000A/B as the ODU. Use this page to configure the primary ODU’s Transmit and Receive Parameters.
Page 539 CDM-425 Advanced Satellite Modem Revision 0 • LNA Power Enable – From the drop-down list, select On or Off. • LNA Fault Logic – From the drop-down list, select Summary or No Summary. Unit • AGC (Automatic Gain Control) – From the drop-down list, select On or Off.
Page 540: Odu | Status
CDM-425. Use this page to review read-only status windows pertaining to the current operating condition for either the Comtech EF Data CSAT-5060 or the KST-2000A/B ODU. 10.4.2.4.3.1 ODU | Status (CSAT-5060) Figure 10-12 shows the ‘ODU | Status’ page as it appears when you configure the Comtech EF Data CSAT-5060 as the ODU.
Page 541 10.4.2.4.3.2 ODU | Status (KST-2000A/B) Figure 10-13 shows the read-only ‘ODU | Status’ page as it appears when you configure the Comtech EF Data KST-2000A/B as the ODU. Figure 10-13. ODU | Status Page (KST-2000A/B) ODU Type / HPA Type The section identifies the installed equipment types.
Page 542: Odu | Utilities
The appearance of the ‘ODU | Utilities’ page adjusts to the type of ODU that is configured for operation with the CDM-425. Use this page to configure various ODU utility functions for either the Comtech EF Data CSAT-5060 or the KST-2000A/B ODU.
Page 543 CDM-425 Advanced Satellite Modem Revision 0 Recalibrate LNA Current Click to recalibrate the LNA Current. Redundancy Box Mode Select Automatic or Manual, and then click [Submit]. ODU Date & Time • Enter a date in the form DD/MM/YY (where DD = day [01 to 31], MM = month [01 to 12], and YY = year [00 to 99]).
Page 544 10.4.2.4.4.2 ODU | Utilities (KST-2000A/B) Figure 10-15 shows the read-only ‘ODU | Utilities’ page as it appears when you configure the Comtech EF Data KST-2000A/B as the ODU. Figure 10-15. ODU | Utilities Page (KST-2000A/B) ODU Type / HPA Type This section identifies the installed equipment types.
Page 545: Odu Operations Via The Telnet Command Line Interface (Cli)
1. The CDM-425 Telnet Command Line Interface (CLI) is accessible only when the optional IP Packet Processor is installed and enabled. 2. The CDM-425 Telnet CLI uses Telnet TCP Port 107. Be sure to specify this port when configuring your terminal emulator for CLI operation.
Page 546: Odu Operations Using The Telnet Cli
10.5.1 ODU Operations using the Telnet CLI 1. ODU Comms must be Enabled, and the CDM-425 must be configured for 70/140 MHz operation in order to fully use the Telnet CLI ODU menus. 2. The Comtech EF Data KST-2000A/B Transceiver and LPOD Amplifier / Block Up Converter are not supported by the Telnet CLI at this time.
Page 547 Outdoor Unit (ODU) Access ODU comms, CSAT-5060 configuration submenus Redundancy Access 1:1 or 1:N redundancy configuration submenu Enter alphanumeric Circuit ID; view read-only CDM-425 operations information General Information screens Access Base Modem and Packet Processor stored events and statistics logs,...
Page 548: 10.5.1.2 Home > Outdoor Unit (Odu) Submenu
Revision 0 10.5.1.2 Home > Outdoor Unit (ODU) Submenu After configuring the CDM-425 for 70/140 MHz operation, you may use the ‘ODU’ pages to control and monitor the CSAT-5060 Outdoor Unit that is connected via FSK to the CDM-425. Open the ODU submenu from the Home menu. This submenu contains the following options:...
Page 549: Home > Outdoor Unit (Odu) > Csat-5060 Submenu
CDM-425 Advanced Satellite Modem Revision 0 10.5.1.2.1 Home > Outdoor Unit (ODU) > CSAT-5060 Submenu Open the nested CSAT-5060 submenu from the ODU submenu. This submenu contains the following options: Dialog Window Option Entry Sect. Select Use the ↑↓ arrow keys to select Csat1 or Csat2...
Page 550 10.5.1.2.1.1 Home > Outdoor Unit (ODU) > CSAT-5060 > Up Converter Settings 1/2, 2/2 After configuring the CDM-425 for L-Band operation, and when a Block Up Converter (BUC) is installed, you may use this page to configure BUC operating settings and to view the BUC operational status.
Page 551 10.5.1.2.1.2 Home > Outdoor Unit (ODU) > CSAT-5060 > Down Converter Settings 1/2, 2/2 After configuring the CDM-425 for L-Band operation, and when a Low Noise Block Down Converter (LNB) is installed, you may use this page to configure LNB operating settings and to view the LNB operational status.
Page 552 CDM-425 Advanced Satellite Modem Revision 0 The Down Converter Settings 1/2 page contains the following options: Dialog Window Option Entry Rx Frequency Enter a value from 3400.000 to 4200.000 MHz Rx Attenuation Enter a value from 0.00 to 20.00 dB Rx Slope Mode Use the ↑↓...
Page 553 CDM-425 Advanced Satellite Modem Revision 0 Dialog Window Option Entry Use the ↑↓ arrow keys to select Unmuted After Freq Change or Unit Mute Mode Muted After Freq Change Unit Auto Fault Recovery Use the ↑↓ arrow keys to select Disabled or Enabled Unit Cold Start Use the ↑↓...
Page 554 CDM-425 Advanced Satellite Modem Revision 0 10.5.1.2.1.4 Home > Outdoor Unit (ODU) > CSAT-5060 > LNA Settings Open the LNA Settings page from the nested CSAT-5060 submenu. This page contains the following options: Dialog Window Option Entry Enter a value as follows: Unit LNA Current Window Range 1 –...
Page 555 CDM-425 Advanced Satellite Modem Revision 0 10.5.1.2.1.5 Home > Outdoor Unit (ODU) > CSAT-5060 > Status Open the read-only Status page from the nested CSAT-5060 submenu. This page provides the following information: Item Description Online State Identifies the unit as Online or Offline...
Page 556 CDM-425 Advanced Satellite Modem Revision 0 10.5.1.2.1.6 Home > Outdoor Unit (ODU) > CSAT-5060 > Logs Open the Logs page from the nested CSAT-5060 submenu. This page contains the following options: Dialog Window Option Entry Reset Event Pointer Typical for either entry – Use the ↑↓ arrow keys to select No or Clear Event Log Press a hot key to open a dialog window.
Page 557 CDM-425 Advanced Satellite Modem Revision 0 10.5.1.2.1.7 Home > Outdoor Unit (ODU) > CSAT-5060 > Redundancy Open the Redundancy page from the nested CSAT-5060 submenu. Redundant ODU configuration options are as follows: Dialog Window Option Entry Unit Red Force Switch Use the ↑↓...
Page 558 CDM-425 Advanced Satellite Modem Revision 0 Notes: ODU (Transceiver, BUC, LNB) Operation 10–68 MN-CDM-425...
Page 559: Appendix A. Cable Drawings
Overview The EIA-530 standard pinout provided on the CDM-425 Advanced Satellite Modem is becoming more popular in many applications. However, there are still many occasions – especially for existing EIA-422/449 and V.35 users – when a conversion is required. For these situations: •...
Page 560 CDM-425 Advanced Satellite Modem Revision 0 Figure A-1. EIA-530 to EIA-422/449 DCE Conversion Cable (CEFD P/N CA/WR0049) Appendix A MN-CDM-425...
Page 561: Eia-530 To V.35 Dce Conversion Cable
CDM-425 Advanced Satellite Modem Revision 0 A.1.2 EIA-530 to V.35 DCE Conversion Cable Use this EIA-530 to V.35 DCE Conversion Cable for connections between the CDM425 Advanced Satellite Modem and the user data. Figure A-2. EIA-530 to V.35 DCE Conversion Cable...
Page 562: Eia-232 Remote Control Cable
Use this EIA-232 Remote Control Cable for firmware updates in the absence of an Ethernet-based connection. You may also use this cable for serial-based M&C of the CDM-425 Advanced Satellite Modem. Connect this cable from the CDM-425 Advanced Satellite Modem Rear Panel “Remote Control”...
Page 563: Appendix B. Forward Error Correction (Fec) Options
MODULATION) OPTION VersaFEC is a system of short-block LDPC codes that have been designed as a low-latency alternative to both Comtech EF Data’s existing LDPC codes, and to the system set forth in the DVB-S2 specification (EN 302307) ratified by ETSI.
Page 564: Table B-1. The Versafec Modcod Set
CDM-425 Advanced Satellite Modem Revision 0 Table B-1. The VersaFEC ModCod Set Typical Min. Data Max. Data Eb/No, for Spectral Latency at Code Block size, Rate, Rate, ModCod Modulation efficiency, BER = 5 x Rate kbits 64 kbps (ms) CCM mode...
Page 565 CDM-425 Advanced Satellite Modem Revision 0 The performance of the VersaFEC codes compared with the Shannon bound is shown in Figure B-1. This puts the performance of VersaFEC at or near the DVB-S2 performance with 16 kbit blocks. Figure B-1. VersaFEC Codes versus Shannon Capacity Note that SNR is used in place of Eb/No –...
Page 566: Versafec Extensions
CDM-425 Advanced Satellite Modem Revision 0 B.1.1 VersaFEC Extensions B.1.1.1 Extended CCM Codes Two additional rates are available with the VersaFEC family of codes. Note that these are CCM (Constant Coding and Modulation) only – they are NOT included in the ACM set of ModCods.
Page 567: Versafec-2 Acm And Ccm
FEC / V FEC-2 ACM (ADAPTIVE CODING ERSA ERSA MODULATION) OPTION Comtech EF Data’s second generation VersaFEC-2 comprises 74 new ModCods, with a new family of constellations. • VersaFEC-2 has two modes: Long Block – Maximum coding gain with higher latency.
Page 568 CDM-425 Advanced Satellite Modem Revision 0 Eb/No in dB 1E-1 Comtech VersaFEC® Codec Rate 0.488 BPSK Uncoded BPSK/QPSK 1E-2 1E-3 Rate 0.488 BPSK 1E-4 Typical performance shown - guaranteed performance curve is 0.3 dB to the right 1E-5 1E-6 1E-7...
Page 569 CDM-425 Advanced Satellite Modem Revision 0 Eb/No in dB 1E-1 Comtech VersaFEC® Codec Rate 0.533, 0.631, 0.706, Uncoded and 0.803 QPSK BPSK/QPSK 1E-2 Rate Rate Rate Rate 1E-3 0.533 0.631 0.706 0.803 QPSK QPSK QPSK QPSK 1E-4 Typical performance shown - guaranteed performance curves are 0.3 dB to the right...
Page 570 CDM-425 Advanced Satellite Modem Revision 0 Eb/No in dB 1E-1 Comtech VersaFEC® Codec Rate 0.642, 0.711, 0.780 Uncoded BPSK/QPSK 8-QAM 1E-2 Rate Rate Rate 0.642 0.711 0.780 8-QAM 8-QAM 8-QAM 1E-3 Uncoded 8-PSK 1E-4 1E-5 1E-6 1E-7 Typical performance show - guaranteed performance curves are 0.3 dB to the right...
Page 571 CDM-425 Advanced Satellite Modem Revision 0 Eb/No in dB 1E-1 Comtech VersaFEC® Codec Rate 0.731, 0.780, 0.829 and 0.853 16-QAM Uncoded BPSK/QPSK 1E-2 Uncoded 16-QAM Rate Rate Rate Rate 0.731 0.780 0.829 0.853 16-QAM 16-QAM 16-QAM 16-QAM 1E-3 1E-4 1E-5...
Page 572 CDM-425 Advanced Satellite Modem Revision 0 Eb/No in dB 1E-1 Comtech VersaFEC® Codec - Extended CCM Uncoded BPSK/QPSK 0.576 8-QAM and 1E-2 0.644 16-QAM Rate Rate 0.576 0.644 1E-3 8-QAM 16-QAM Uncoded 8-PSK 1E-4 1E-5 1E-6 1E-7 Typical performance show -...
Page 573 CDM-425 Advanced Satellite Modem Revision 0 Eb/No in dB 1E-1 Comtech Ultra-Low-Latency (ULL) Codec - Rate 0.493 Uncoded BPSK/QPSK BPSK/QPSK, 1E-2 0.654 and 0.734 QPSK Rate Rate Rate 1E-3 0.493 0.654 0.734 QPSK QPSK BPSK/QPSK 1E-4 Typical performance shown - guaranteed performance curves are 0.3 dB to the right...
Page 574 CDM-425 Advanced Satellite Modem Revision 0 BLANK PAGE Appendix B B–12 MN-CDM-425...
Page 575 CDM-425 Advanced Satellite Modem Revision 0 Figure B-8. VersaFEC-2 Short Block Appendix B B–13 MN-CDM-425...
Page 576 CDM-425 Advanced Satellite Modem Revision 0 Figure B-9. VersaFEC-2 Short Block Appendix B B–14 MN-CDM-425...
Page 577: Appendix C. Aupc (Automatic Uplink Power Control
CDM-425 Advanced Satellite Modem Revision 0 Appendix C. AUPC (AUTOMATIC UPLINK POWER CONTROL) AUPC Overview WARNING! YOU MUST OBTAIN PERMISSION FROM THE SATELLITE OPERATOR TO USE THIS FEATURE. IMPROPER USE OF THIS FEATURE COULD RESULT IN A TRANSMITTING TERMINAL SERIOUSLY EXCEEDING ITS ALLOCATED FLUX DENSITY ON THE OPERATOR’S SATELLITE.
Page 578: Setting Aupc Parameters
CDM-425 Advanced Satellite Modem Revision 0 Setting AUPC Parameters The important consideration is that EDMAC framing should be enabled. 1. Use the SELECT: Configuration  Mode menu to first select EDMAC framing. You may select EDMAC as IDLE, or define the unit as an EDMAC Master or Slave.
Page 579: Demod Unlock
CDM-425 Advanced Satellite Modem Revision 0 C.2.4 Demod Unlock This defines the action the modem will take if the remote demodulator loses lock. The two choices are: • NOMINAL (reduce the Tx Output Power to the nominal value) – default setting.
Page 580: Monitoring
CDM-425 Advanced Satellite Modem Revision 0 Monitoring CAUTION – Comtech EF Data strongly cautions against the use of large values of permitted power level increase under AUPC control. Users should consider using the absolute minimum range necessary to improve rain-fade margin.
Page 581: Appendix D. Carrier Id (Dvb-Cid Metacarrier
(CID) technique that uses MetaCarrier® spread spectrum technology to embed a unique carrier identification sequence for the transmitted carrier. The CDM-425 Advanced Satellite Modem with MetaCarrier® is used in tandem with the Comtech EF Data MCDD-100 MetaCarrier® Detection Device to provide a complete MetaCarrier embedding and decoding solution.
Page 582: Functional Description
Functional Description In a typical network, there can be many CDM-425 Advanced Satellite Modems with DVB-CID, and one (or more) MCDD-100 MetaCarrier Detection Devices to verify the presence of the DVB- CID on each carrier. In an interference situation, the MCDD-100 may be used to decode the DVB-CID of an interfering carrier that may not be part of one’s own transmission network, as long...
Page 583: Configuring The Carrier Id Operation
Carrier ID operation requires that you first enable Carrier ID feature operation, and then create a MetaCarrier Custom Message. All other parameters (center frequency, symbol rate, and the MAC address) are set automatically. The CDM-425 Advanced Satellite Modem provides several means for configuring Carrier ID operation: •...
Page 584 ▲▼ arrow keys, then press ENTER. CarrierID:Custom message: () ----------- Comtech EF Data -------------- Enter the custom message that you want to be associated with the particular CDM-425 Advanced Satellite Modem link, using the ▲▼ arrow keys, then press ENTER. Appendix D D–4...
Page 585: Overview
(Terminal Timing (TT)) – the modem can accept it if it is present, but uses ST if it is not. At rates above 2 Mbps, Comtech EF Data highly recommends that you return TT to ensure the correct clock/data relationship.
Page 586: Tx Terrestrial
Sect. 9.2.2 in that, in this mode, the signal appearing on TT is used to provide the timing reference for the transmit side of the CDM-425 Advanced Satellite Modem. However, in this mode, the ST pins on the interface are active and provide a copy of the RX Satellite clock (i.e., the clock from the demodulator, prior to the buffer).
Page 587 CDM-425 Advanced Satellite Modem Revision 0 Figure E-1. TX Clock Modes Appendix E E–3 MN-CDM-425...
Page 588: Receive Clocking
Revision 0 Receive Clocking There are three receive clocking modes in the CDM-425 Advanced Satellite Modem: Buffer Disabled (RX Satellite), Buffer Enabled (TX=RX), and Buffer Enabled (RX< >TX). An additional setting used only for Drop and Insert is described in further detail later in this appendix. Figure E-2 provides a graphic depiction of these modes.
Page 589 CDM-425 Advanced Satellite Modem Revision 0 Figure E-2. RX Clock Modes Appendix E E–5 MN-CDM-425...
Page 590: X.21 Notes
CDM-425 Advanced Satellite Modem Revision 0 X.21 Notes The central feature of X.21 is that the DCE supplies the clock for both directions. Therefore, the first requirement is that TX and RX data rates are the same. Because the DCE doesn’t get an input clock moving in the same direction as its input data, the several nanoseconds of delay through long cables and the modem’s data transceivers can cause the clock phase to change...
Page 591: Frame Formats
CDM-425 Advanced Satellite Modem Revision 0 Frame Formats Figure E-3 shows the supported E1 and T1 Frame Formats. Note that, for D&I++, the smaller overhead frame structure does not support CAS signaling, although E1 timeslot 16 may still be one of the channels transmitted.
Page 592: Timeslot Selection
CDM-425 Advanced Satellite Modem Revision 0 Timeslot Selection Selection of the transmit and receive data rates may be made in certain 64 kbps increments and may be independent of each other. The actual satellite rates for open network D&I are 16/15 of...
Page 593: Drop And Insert (D&I) Clocking
CDM-425 Advanced Satellite Modem Revision 0 Drop and Insert (D&I) Clocking Figure E-4 shows the general arrangement for D&I clocking in the CDM-425 Advanced Satellite Modem. There are two inputs and two outputs shown for D&I Operation: • • Drop Data In (DDI) Insert Data In (IDI) •...
Page 594: Rx Buffer Clock = Insert (D&I Only
CDM-425 Advanced Satellite Modem Revision 0 RX Buffer Clock = Insert (D&I only) The E1 or T1 clock recovery from the IDI G.703 port serves as the RX Buffer reference. In addition, the recovered data is the E1/T1 input to the Insert Mux. If the RX G.703 recovery circuit detects no activity at IDI input, or cannot detect the expected frame format, Buffer Clock = RX Satellite will be chosen as a fall-back.
Page 595: E.11 G.703 Clock Extension
This is accomplished by the use of a novel frequency synthesis and phase locking scheme. This feature of the CDM-425 Advanced Satellite Modem permits the distant end to generate a G.703 synchronizing signal that, depending on a sufficiently accurate local reference, has short term accuracy to within parts in 10 , and is solely dependent on link Doppler shift.
Page 596: Clock Extension Mode 2
CDM-425 Advanced Satellite Modem Revision 0 The only thing that affects the overall accuracy and stability of the copy of the clock is the Doppler shift of the link itself. This will be very dependent on the particular satellite used, and the accuracy of the orbital station keeping (often referred to as orbital inclination).
Page 597 CDM-425 Advanced Satellite Modem Revision 0 CDM-425 CDM-425 Figure E-7. G.703 Clock Extension Mode 1 Appendix E E–13 MN-CDM-425...
Page 598 CDM-425 Advanced Satellite Modem Revision 0 CDM-425 CDM-425 Figure E-8. G.703 Clock Extension Mode 2 Appendix E E–14 MN-CDM-425...
Page 599 CDM-425 Advanced Satellite Modem Revision 0 CDM-425 CDM-425 Figure E-9. G.703 Clock Extension Mode 3 Appendix E E–15 MN-CDM-425...
Page 600 CDM-425 Advanced Satellite Modem Revision 0 BLANK PAGE Appendix E E–16 MN-CDM-425...
Page 601: E.12 Quad E1 Operation
Up to four complete or fractional E1 streams may be concatenated into a single Comtech proprietary satellite frame structure using the Quad E1 feature. The “Balanced G.703” and “Aux G.703” 9-pin D-sub female connectors on the CDM-425 Advanced Satellite Modem rear panel each provide access to two ports. See Chapter 3. REAR PANEL CONNECTORS PINOUTS, Sect.
Page 602 CDM-425 Advanced Satellite Modem Revision 0 BLANK PAGE Appendix E E–18 MN-CDM-425...
Page 603: Appendix F. Double Talk Carrier-In-Carrier (Cnc) Option
– involves trade-off between modulation and coding. A lower order modulation requires less transponder power while using more bandwidth; conversely, higher order modulation reduces required bandwidth, albeit at a significant increase in power. Comtech EF Data has added a new dimension to satellite communication optimization: DoubleTalk Carrier-in-Carrier. F.1.1 What is DoubleTalk Carrier-in-Carrier? The CDM-425 Advanced Satellite Modem’s DoubleTalk Carrier-in-Carrier (CnC) option uses a...
Page 604: Application Requirements
• Link must be full duplex. • A CDM-425 Advanced Satellite Modem must be used at the end of the link where the cancellation needs to take place. • he transponder is operated as Loopback. That is, each end of the link must be able to see a copy of its own signal in the return (downlink) path from the satellite.
Page 605 2. Frequency offset and drift: Common sources are satellite Doppler shift, up and down converter frequency uncertainties, and other drift associated with the electronics in the CDM-425 Advanced Satellite Modem itself. CnC tracks and compensates for this frequency offset and drift.
Page 606: Operational Recommendations
The transponder downlinks the composite signal containing both carriers on the same band to the CDM-425 which then translates the signal to near baseband where it can be filtered (decimated) and then processed as a complex envelope signal. The CDM-425 then suppresses the version of the near end carrier on the downlink side and then passes the desired carrier to the demodulator for normal processing.
Page 607 CDM-425 Advanced Satellite Modem Revision 0 Figure F-2. Conventional FDMA Link Appendix F F–5 MN-CDM-425...
Page 608 CDM-425 Advanced Satellite Modem Revision 0 Figure F-3. Same Link Using CDM-425 Advanced Satellite Modem and DoubleTalk Carrier-in-Carrier Figure F-4. Duplex Link Optimization Appendix F F–6 MN-CDM-425...
Page 609: Table F-1. Spectral Efficiency Using Doubletalk Carrier-In-Carrier
CDM-425 Advanced Satellite Modem Revision 0 CnC operates on the near-zero signal before the demodulator, and is waveform agnostic. This means that no prior knowledge of the underlying modulation, FEC, or any other waveform specific parameter is required in order to perform the signal suppression operation. The only caveat to this is that the waveform must be sufficiently random.
Page 610: Doubletalk Carrier-In-Carrier Cancellation Process
CDM-425 Advanced Satellite Modem Revision 0 As shown in Table F-1, DoubleTalk Carrier-in-Carrier allows equivalent spectral efficiency using a lower order modulation and/or FEC Code Rate; CAPEX is therefore reduced by allowing the use of a smaller BUC/HPA and/or antenna. And, as DoubleTalk Carrier-in-Carrier can be used to save transponder bandwidth and/or transponder power, it can be successfully deployed in bandwidth-limited as well as power-limited scenarios.
Page 611: Margin Requirements
BER. Margin requirements depend on the product, modulation and power ratios: For the CDM-425 Advanced Satellite Modem, the additional margin requirements are as follows: Table F-2. Margin Requirements...
Page 612: Carrier-In-Carrier And Adaptive Coding And Modulation
F.2.4 Carrier-in-Carrier and Adaptive Coding and Modulation Carrier-in-Carrier is fully compatible with VersaFEC Adaptive Coding and Modulation (ACM) mode of operation in the CDM-425 Advanced Satellite Modem. Carrier-in-Carrier combined with VersaFEC ACM can provide 100-200% increase in average throughput. F.2.5...
Page 613 CDM-425 Advanced Satellite Modem Revision 0 The traditional link was based on QPSK TPC 3/4 and required 0.96 MHz of leased BW. The LST summary for the traditional link is shown in Figure F-7. Figure F-7. Symmetric Data Rate Traditional Link Carrier-in-Carrier link design involved trying different Modulation &...
Page 614 CDM-425 Advanced Satellite Modem Revision 0 Link parameters and LST summary for QPSK, LDPC 2/3 with Carrier-in-Carrier is shown in Figure F-8. Figure F-8. Link Parameters and LST Summary for QPSK, LDPC 2/3 with Carrier-in-Carrier Appendix F F–12 MN-CDM-425...
Page 615: Asymmetric Data Rate Link
CDM-425 Advanced Satellite Modem Revision 0 The link budget summary for the different ModCod combinations is shown in Table F-4. Table F-4. Link Budget Summary for ModCod Combinations Savings Compared Allocated Leased BW S. No. Modulation & FEC PEB (MHz)
Page 616 CDM-425 Advanced Satellite Modem Revision 0 Consider the example shown in Table F-6. Table F-6. Asymmetric Data Rate Link Example Satellite & Transponder IS-901 @ 342º W, 22/22 (EH/EH) Earth Station 1 Africa – 4.5 m Earth Station 2 Africa – 3.0 m...
Page 617: Power Limited Links
CDM-425 Advanced Satellite Modem Revision 0 F.2.5.3 Power Limited Links Carrier-in-Carrier can provide substantial savings even when the original link is power limited. Spreading the carrier by using a lower modulation and/or FEC along with latest FEC such as VersaFEC can substantially reduce the total power, which can then be traded with bandwidth using Carrier-in-Carrier.
Page 618 CDM-425 Advanced Satellite Modem Revision 0 Whereas the original link used 8-PSK TPC 3/4, the Carrier-in-Carrier link used QPSK VersaFEC 0.803. The savings summary is as follows: Table F-10. Carrier-in-Carrier Link Savings Summary Original Link With Carrier-in-Carrier and VersaFEC Item...
Page 619: Carrier-In-Carrier Commissioning And Deployment
Carrier-in-Carrier mode and all system issues including external interference, antenna pointing, cabling, SSPA backoff are resolved., You should attempt to turn Carrier-in-Carrier on only after the link is robust. Comtech EF Data recommends that you do these steps for CnC commissioning and deployment: Step Task Turn ON the carrier at Site ‘A’.
Page 620: Validate Carrier-In-Carrier Performance
You may easily validate Carrier-in-Carrier performance by verifying that Eb/No degradation due to Carrier-in-Carrier is within published specification for the observed Power Spectral Density Ratio. Comtech EF Data recommends that you do these steps to validate CnC performance: Step Task Setup a conventional side-by-side link of the desired Eb/No: Carrier-in-Carrier should be OFF.
Page 621: Operational References
Revision 0 Operational References F.3.1 Calculate Carrier-in-Carrier Link Budget Comtech EF Data recommends that you do these steps to calculate the link budget for a CnC Link: Step Task Calculate the link budget for both carriers in the duplex link, with required CnC margin: Verify that the PDS ration is within spec for the CDM-425 Advanced Satellite Modem.
Page 622: Methods To Estimate Psd Ration
CDM-425 Advanced Satellite Modem Revision 0 F.3.2 Methods to Estimate PSD Ration F.3.2.1 Use Downlink EIRP and Symbol Rate Use Downlink EIRP and Symbol Rate to estimate the PSD Ratio from a link budget: PSD = Downlink EIRP – 10 * Log (Symbol Rate) Table F-11.
Page 623: Use Satmaster
CDM-425 Advanced Satellite Modem Revision 0 F.3.2.3 Use Satmaster F.3.2.4 Use a Spectrum Analyzer You may use a Spectrum Analyzer capable of integrating the signal power in a given bandwidth to estimate PSD Ratio or CnC Ratio: CnC Ratio (in dB) = Power (in dBm) –...
Page 624: Carrier-In-Carrier Automatic Power Control (Cnc-Apc
Carrier-in-Carrier Automatic Power Control (CnC-APC) F.4.1 Overview A number of Comtech EF Data modems, including the CDM-425 Advanced Sattelite Modem, offer Automatic Uplink Power Control (AUPC) to mitigate the effects of rain fading and other link impairments. It is important to note that the simple system employed in AUPC (whereby distant-end Eb/No is...
Page 625 RF chain ever go past -1 dB, the maximum power increase that can be permitted is 2 dB. You enter this into the CDM-425 Advanced Sattelite Modem as a setup parameter. If this value is ignored, or incorrectly entered, compression or saturation could occur, either during the initial re-balance, or during a fade event.
Page 626 Following the re-balance, the CDM-425 Advanced Satellite Modem stores key parameters, such as Tx Power level, that are referred to as the Home State. In the event of a loss of communication between the two sides, the modem will revert to Home State, which is a known safe condition that will not cause TCP to be exceeded.
Page 627: Cnc-Apc Framing
CDM-425 Advanced Satellite Modem Revision 0 The depth of fade that the CnC-APC algorithm can tolerate is highly dependent on a number of factors, including: • The CnC Ratio and Eb/No margins following a re-balance. In general, with a highly asymmetric link, where CnC Ratio is not close to zero, the tolerance to fade depth on one side will be less than the other.
Page 628: Cnc-Apc Framing And The Self-Locking Problem
F.4.4.1 CnC-APC Framing and the Self-Locking Problem Self-locking is a problem that has been previously reported to Comtech EF Data Customer Service on CnC links that have identical data rates, FEC and modulation. In the case where both ends of the link are up and running, the CnC canceller performs as intended.
Page 629: Cnc-Apc Setup
CDM-425 Advanced Satellite Modem Revision 0 F.4.6 CnC-APC Setup Chapter 6. FRONT PANEL OPERATIONS To set up CnC-APC, carefully follow and understand the steps as presented here. CAUTION – This procedure should be done only when there are CLEAR SKY conditions at both ends of the link.
Page 630 CDM-425 Advanced Satellite Modem Revision 0 On the top line, use the ▲▼ arrow keys to select the appropriate CnC operating mode. Available selections are: • Off • On (normal) • APC,Side ‘A’,C-Band • APC,Side ‘A’,X-Band • APC,Side ‘A’,Ku-Band • APC,Side ‘A’,Ka-Band •...
Page 631 CDM-425 Advanced Satellite Modem Revision 0 5. Go back to the SELECT: CONFIG CnC  MODE menu. On the bottom line, which will be displaying Activate? N (Y,N), use the ▲▼ arrow keys to select Y(Yes)and then press ENTER. The modem display will update, similar to the following example: The CnC Mode: APC,Side ‘A’,C-Band (Off,On,APC)
Page 632 CDM-425 Advanced Satellite Modem Revision 0 Displayed Message Expanded Meaning No Re-balance - the solution calculated by each end does not match Fail-CalcMismatch The CnC ratio is too high (>9 dB) for re-balancing to be attempted CnC Ratio too high...
Page 633: Cnc-Apc Redundancy Support Notes
Chapter 6. FRONT PANEL OPERATION, Sect. 6.2.1.8.4 CONFIG: CnC  PMSI-Control At this time, 1:N redundancy in the CRS-300/CRS-500 is not yet supported – a firmware update for these switches will be available in the future. Please consult Comtech EF Data Technical Support for updated information.
Page 634: Doubletalk Carrier-In-Carrier Specifications
CDM-425 Advanced Satellite Modem Revision 0 DoubleTalk Carrier-in-Carrier Specifications Requires the two links to share a common carrier frequency (Outbound and Inbound symbol Operating Mode rates do not have to be equal) BSPK/QPSK/8-PSK/8-QAM: –7 dB to +11 dB (ratio of power spectral density, outbound...
Page 635: Glossary
CDM-425 Advanced Satellite Modem Revision 0 Carrier-in-Carrier Summary Comtech EF Data’s DoubleTalk Carrier-in-Carrier can provide significant savings in operational expenses. The following should be considered when evaluating DoubleTalk Carrier-in-Carrier: • DoubleTalk Carrier-in-Carrier can only be used for full duplex links where the transmitting earth station is able to receive itself.
Page 636 CDM-425 Advanced Satellite Modem Revision 0 CnC Ratio Ratio of Interfering Carrier Power to Desired Carrier Power (unit in dB). The Interfering Carrier is the Tx Carrier from local modulator; the Desired Carrier is the carrier from the distant end received by the local demodulator.
Page 637 CDM-425 Advanced Satellite Modem Revision 0 Co+No/No Ratio of Carrier Density (C ) + Noise (N ) to Noise Density (N ) (unit in dB): C/N = C/N – 10log(B) [where B is bandwidth in Hz] = C/N – 10log(DR) [where DR is data rate in bits/sec] = C/N + 10log(B) –...
Page 638 CDM-425 Advanced Satellite Modem Revision 0 BLANK PAGE Appendix F F–36 MN-CDM-425...
Page 639: Appendix G. E B /Nomeasurement
Appendix G. E MEASUREMENT Overview Although the CDM-425 Advanced Satellite Modem calculates and displays the value of receive on the front panel of the unit, it is sometimes useful to measure the value using a spectrum analyzer, if one is available.
Page 640: Co+No)/No Example
CDM-425 Advanced Satellite Modem Revision 0 Figure G-1. (Co+No)/No Measured Example G.1.1 (Co+No)/No Example In Figure G-1, the (Co+No)/No measured is 4.6 dB. If Rate 1/2 QPSK is used, this corresponds to an E of approximately 2.6 dB. The exact relationship used to derive the table values is as...
Page 641 CDM-425 Advanced Satellite Modem Revision 0 Figure G-2. Eb/No Table Appendix G G–3 MN-CDM-425...
Page 642 CDM-425 Advanced Satellite Modem Revision 0 BLANK PAGE Appendix G G–4 MN-CDM-425...
Page 643: Appendix H. Edmac Channel
CDM-425 Advanced Satellite Modem Revision 0 Appendix H. EDMAC CHANNEL Overview H.1.1 EDMAC The Embedded Distant-end Monitor and Control (EDMAC) feature permits user access to the M&C features of modems that are at the distant-end of a satellite link. This is accomplished by adding extra information to your data, but in a manner that is otherwise transparent.
Page 644: Drop & Insert
CDM-425 Advanced Satellite Modem Revision 0 The use of an externally synchronized scrambler and descrambler almost exactly compensates for this degradation. The net effect is that you will see effectively identical BER performance, whether or not framing is used. On the receive side When the demodulator locks to the incoming carrier, it must go through the additional step of searching for and locking to the synchronization word.
Page 645 CDM-425 Advanced Satellite Modem Revision 0 At the distant-end, the EDMAC slave, configured for the correct address, receives these bytes, and when a complete packet has been received, it will take the action requested, and then send the appropriate response to the EDMAC Master, using the return overhead path on the satellite link.
Page 646: Setup Summary
CDM-425 Advanced Satellite Modem Revision 0 Setup Summary To access a distant-end unit: • Designate a Master/Slave pair: Master at the local-end, Slave at the distant-end. • On the local-end unit, enable framing and EDMAC, define the unit as MASTER, and then enter the bus address.
Page 647: Appendix I. Ethernet Network Configuration
CONFIGURATION Overview The CDM-425 Advanced Satellite Modem’s handling of Ethernet terrestrial traffic data differs depending on whether the optional IP Packet Processor is either not installed or installed but disabled; or when the optional IP Packet Processor is installed and enabled.
Page 648: Ethernet Overview
Interface Architecture Figure I-1. Ethernet Architecture Design Figure I-1 shows the internal Ethernet architecture for the CDM-425 Advanced Satellite Modem, which features four built-in 10/100 BaseT Ethernet Ports (port configuration and statistics are available on a per-port basis) connected to a single internal Ethernet Layer 2 Managed Switch.
Page 649: Ethernet Networking Loops
Figure I-2. Improper Use of External Ethernet Switch Care must be taken to avoid Ethernet Networking Loops. Specifically, the network operator must make sure to avoid connecting multiple ports of the CDM-425 Advanced Satellite Modem to the same external Ethernet switch, as shown in Figure I-2.
Page 650: Networking Loops In Managed Switch Mode
CDM-425 Advanced Satellite Modem Revision 0 I.2.3.1 Networking Loops in Managed Switch Mode I.2.3.1.1 Hub-to-Hub Using Ethernet Switches Figure I-4. Networking Loop Example When connecting two or more “hub-sites” where there are multi-paths between each site, care must be taken to ensure that no Ethernet Networking Loops occur. Figure I-4 shows two hub- sites connected with two or more modems, where all the traffic being transmitted and received is on the same LAN/VLAN.
Page 651: Hub-To-Hub Using Ethernet Routers
CDM-425 Advanced Satellite Modem Revision 0 I.2.3.1.2 Hub-to-Hub Using Ethernet Routers Figure I-5. Hub-to-Hub with Standard Traffic Using Routers Figure I-5 shows two hub-sites connected with standard Ethernet traffic, using routers instead of switches for the Ethernet connection. The routers will block the broadcasts coming from the remote network;...
Page 652: Hub-To-Remotes Using Ethernet Switches Or Routers
CDM-425 Advanced Satellite Modem Revision 0 I.2.3.1.3 Hub-to-Remotes Using Ethernet Switches or Routers Figure I-6. Hub-to-Remotes with Standard Traffic Using Routers or Switches Figure I-6 shows a hub-to-remotes configuration using switches or routers with standard Ethernet traffic, the routers/switches will block broadcasts coming from the hub and remote networks;...
Page 653: Networking Loops In Router Mode (With Ip Packet Processor
CDM-425 Advanced Satellite Modem Revision 0 I.2.3.2 Networking Loops in Router Mode (with IP Packet Processor) Figure I-7. Point-to-Point Configuration in “Router Multipoint Hub” Working Mode In a network where more than one working mode is set to “Router Multipoint Hub”, care must be taken in route table configuration to avoid Ethernet Networking Loops.
Page 654: Ethernet Network Configurations In Managed Switch Mode
CDM-425 Advanced Satellite Modem Revision 0 Ethernet Network Configurations in Managed Switch Mode I.3.1 Point-to-Multipoint Hub-to-Remotes, Split-path Traffic Using Routers Figure I-8. Point-to-Multipoint Using Routers Figure I-8 shows hub-to-remotes configuration using routers with standard and split-path Ethernet traffic. A Static ARP Entry is needed in the switch so that routing of the Tx side of the modems will be on the correct port of the router.
Page 655: Point-To-Multipoint Hub-To-Remotes, Split-Path Traffic Using Switches
CDM-425 Advanced Satellite Modem Revision 0 I.3.2 Point-to-Multipoint Hub-to-Remotes, Split-path Traffic Using Switches Figure I-9. Point-to-Multipoint Using Switches With switches used, the hub and remote are on the same subnet as shown in Figure I-9, meaning that broadcasts will be allowed to transverse the network. Learning Mode must be disabled on the Hub Tx/Rx modem, because if a computer on the remote sends a broadcast out to the Hub, the modem learns that MAC is local –...
Page 656: Ethernet Network Configurations In Router Mode (With Ip Packet Processor
Figure I-10 depicts a Point-to-Multipoint (Router Multipoint Hub) setup, with the optional IP Packet Processor installed, enabled in the CDM-425 Advanced Satellite Modem, and configured for Router Mode. This configuration features a Hub Outbound, with a rack of Hub Demods (Rx-only that are connected on single LAN networks), and Remotes (each) connected to a separate LAN network).
Page 657: Router Multipoint Hub Configuration
CDM-425 Advanced Satellite Modem Revision 0 I.4.1.1 Router Multipoint Hub Configuration Chapter 7. ETHERNET-BASED PRODUCT MANAGEMENT To configure a Router Multipoint Hub Network: • For the “Hub Outbound” Modem Configuration: Refer to Chapter 7. ETHERNET-BASED PRODUCT MANAGEMENT, Sect. 7.5.4.3.2.1 Configuration | LAN | IP. From the page’s Network Configuration section, use the Working Mode drop-down menu to select the mode as Router Multipoint Hub, and then click [Submit] to accept this configuration change.
Page 658: Multicast Routing Mode
CDM-425 Advanced Satellite Modem Revision 0 I.4.2 Multicast Routing Mode Figure I-11. Multicast Routing Diagram Multicast Routing Mode, available when the optional IP Packet Processor is installed and enabled, establishes communications via one single source (referred to as the Multicast Sender) and routes to many groups of destination nodes (referred to as Multicast Receivers).
Page 659: Multicast Routing Configuration
CDM-425 Advanced Satellite Modem Revision 0 I.4.2.1 Multicast Routing Configuration Chapter 7. ETHERNET-BASED PRODUCT MANAGEMENT To configure a Multicast Routing Network (Figure I-12): • For “Hub Outbound” Modem Configuration – Refer to Chapter 7. ETHERNET- BASED PRODUCT MANAGEMENT, Sect. 7.5.4.3.3.1 Configuration | Routing | Routes.
Page 660: Ethernet Overhead Over Wan Interface
Router Mode or Managed Switch Mode (with IP Packet Processor) When the optional IP Packet Processor is installed and enabled: The CDM-425 Advanced Satellite Modem uses Comtech EF Data’s patented Streamline Encapsulation (SLE) Framing instead of HDLC Framing. Note that in SLE Framing, no bit stuffing overhead is involved; hence, WAN overhead is deterministic.
Page 661: Ethernet Redundancy
Packet Processor Redundancy is supported in both 1:1 and 1:N redundant configurations using the CRS-500 M:N Redundancy System. Refer to the pertinent switch Installation and Operation Manuals for detailed information on using the CDM-425 Advanced Satellite Modem in a redundancy configuration. Appendix I I–15...
Page 662: Advanced Network Timing
CDM-425 Advanced Satellite Modem Revision 0 Advanced Network Timing I.7.1 Overview The Advanced Network Timing (ANT) feature provides IP-based protocols to synchronize the modem's internal time-of-day clock to an external device such as a time server, Base Station Controller (BSC), or Radio Network Controller (RNC).
Page 663 Quality of Service (QoS) buffer, Rx/Tx FIFOs, Satellite Doppler, etc. The CDM-425 Advanced Satellite Modem bridges PTP from LAN to WAN and vice versa, and uses a 2-step synchronization (i.e., it sends both sync and follow-up messages when acting as a master).
Page 664 As shown in Figure I-14: • The first segment is between the RNC/BSC and the CDM-425 Advanced Satellite Modem ‘A’ (near-end modem) LAN port. In this segment, the RNC/BSC is the master, and the near-end modem LAN port is the slave.
Page 665 PROCESSOR OPTION Overview The IP Packet Processor is an optional feature for the CDM-425 Advanced Satellite Modem. In addition to providing Layer 3 functionality, it incorporates a number of key features for Wide Area Network (WAN) bandwidth optimization. This includes very low overhead Streamline Encapsulation (SLE), Header Compression, Payload Compression, Advanced Quality of Service (QoS), and Advanced Encryption Standard (AES) Encryption.
Page 666: J.1.1 Operational Requirements
SLE can reduce the encapsulation overhead by as much as 65% compared to industry-standard HDLC. J.2.2 Modes of Operation Appendix I. ETHERNET NETWORK CONFIGURATION A CDM-425 Advanced Satellite Modem equipped with the IP Packet Processor can operate in four modes to support Point-to-Point and Point-to-Multipoint network topologies: • Router Point-to-Point •...
Page 667: Subsystem Multiplex (Sub-Mux
• Chapter 5. FAST ACTIVATION PROCEDURE • Chapter 6. FRONT PANEL OPERATION If there is a need to upgrade the CDM-425 Advanced Satellite Modem IP Packet Processor’s functionality, Comtech EF Data provides Fully Accessible System Topology (FAST), a technology that permits the purchase and installation of options through special authorization codes. These unique Fast Access Codes may be purchased from Comtech EF Data during normal business hours, and then loaded into the unit using the front panel keypad.
Page 668: Advanced Quality Of Service (Qos
CDM-425 Advanced Satellite Modem Revision 0 Contact Comtech EF Data Product Support to acquire the following available FAST options: • Quality of Service (QoS) • AES Encryption • Header Compression Up to 5 Mbps (CCM) / 1200 ksps (ACM) Up to 10 Mbps (CCM) / 4100 ksps (ACM)
Page 669 CDM-425 Advanced Satellite Modem Revision 0 J.2.5.2 Advanced Encryption Standard (AES) Encryption Chapter 7. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT • Sect. 7.5.4.3.3.1 Configuration | Routing | Routes • Sect. 7.5.4.3.4 Configuration | Managed Switch • Sect. 7.5.4.3.5.3 Configuration | WAN | Encryption When the AES Encryption option is active and enabled on a WAN route, the IP Packet Processor will encrypt all outgoing traffic on the WAN, and decrypt any encrypted traffic it receives.
Page 670: Operation With Ip Packet Processor
• The managed device – This includes the CDM-425 Advanced Satellite Modem. • The SNMP Agent – The software that runs on the CDM-425 Advanced Satellite Modem. The SNMP Agent supports both SNMPv1 and SNMPv2c. • The user-supplied Network Management System (NMS) – The software that runs on the manager.
Page 671: Telnet Interface
Chapter 8. SERIAL-BASED REMOTE PRODUCT MANAGEMENT Chapter 9. TELNET COMMAND LINE INTERFACE (CLI) OPERATION Comtech EF Data provides a Telnet interface for the purpose of equipment monitor and control (M&C) using either the standard remote control protocol or, when the optional IP Packet Processor is installed and enabled, the Telnet Command Line Interface (CLI).
Page 672: List Of Supported Internet Rfcs (Requests For Comment
CDM-425 Advanced Satellite Modem Revision 0 List of Supported Internet RFCs (Requests for Comment) RFC No. Description User Datagram Protocol Internet Protocol Transmission Control Protocol Ethernet Address Resolution Protocol A Standard for the Transmission of IP Datagrams over Ethernet Networks...
Page 673: Ip Packet Processor Field Upgrade Procedure
J.5.1 Overview This section describes the field upgrade procedure you will need to follow to retrofit your CDM-425-Advanced Satellite Modem with the optional IP Packet Processor card. See Sections J.1.1 and J.1.2 in this appendix for a detailed description of the requirements and limitations of using the IP Packet Processor with the CDM-425 Advanced Satellite Modem.
Page 674: J.5.3 Field Upgrade Procedure
Illustrations in the followings step are shown as examples and for reference purposes. They may not show your exact modem model. Step Task Turn off the CDM-425 Advanced Satellite Modem and disconnect the modem’s power cord from its power source. Next, use the screwdriver to remove the top cover mounting hardware. Remove the cover from the chassis.
Page 675 CDM-425 Advanced Satellite Modem Revision 0 Step Task The illustration at right identifies the upgrade locations within the chassis for: Installation of the fan into the chassis (A); • Plug-in of both the fan power cable (B) and IP Packet •...
Page 676 CDM-425 Advanced Satellite Modem Revision 0 Step Task Use the screwdriver and pliers, as needed, to install the fan (CEFD P/N PL-0000449) and fan guard (CEFD P/N FN/FGDC12V01) securely into the chassis with the provided mounting hardware (4X CEFD P/N HW/4-40X3/4PH 4-40 x 3/4 pan head screws and 4X CEFD P/N HW/440HXNUTLOC 4-40 locking hex nuts) at the designated location.
Page 677 CDM-425 Advanced Satellite Modem Revision 0 Step Task Use needle-nose pliers as needed to plug the fan power cable receptacle (A) into the mating connector on the modem’s framing board (B). IMPORTANT NOTE 1: Note the orientation of the fan’s power cable receptacle and wiring to the mating connector and its pins on the modem’s framing board.
Page 678 CDM-425 Advanced Satellite Modem Revision 0 Step Task Prepare the IP Packet Processor Card for installation by aligning its receptacle with the mating connector on the modem’s framing board. Plug the card firmly into the connector – take care not to damage any top-mounted components.
Page 679 CDM-425 Advanced Satellite Modem Revision 0 Step Task Plug the front panel ribbon cable back into its mating connector on the modem’s framing board. Use the screwdriver to reinstall the top cover onto the chassis with its existing mounting hardware.
Page 680 CDM-425 Advanced Satellite Modem Revision 0 The CDM-425 Advanced Satellite Modem IP Packet Processor upgrade is now complete. You may turn on and resume use of the modem. Appendix J J–16 MN-CDM-425...
Page 681: Overview
Comtech EF Data and Comtech AHA Enterprise Products Group. VersaFEC is a registered trademark of Comtech AHA Enterprise Products Group. ACM (Adaptive Coding and Modulation) is a significant feature in the CDM-425 Advanced Satellite Modem. It may be used with either VersaFEC or, for modems running Firmware Version 1.1.1 or later, with a VersaFEC-2 plug-in Option Card, and activated with the appropriate FAST...
Page 682: Background
CDM-425 Advanced Satellite Modem Revision 0 Background ACM has been used for some time in wireless communications, including terrestrial microwave applications and, more recently, over satellite links. Its primary function is to optimize throughput in a wireless data link, by adapting the modulation order used and the Forward Error Correction code rate –...
Page 683: Requirements For Acm
CDM-425 Advanced Satellite Modem Revision 0 Requirements for ACM A generic example of ACM-over-Satellite is shown in Figure K-1. There are a number of essential requirements for enabling this scheme: 1. A modulator and FEC encoder that can instantaneously, when commanded, change either modulation type (order) or FEC encoder rate, or both.
Page 684 CDM-425 Advanced Satellite Modem Revision 0 BLANK PAGE Appendix K K–4 MN-CDM-425...
Page 685 CDM-425 Advanced Satellite Modem Revision 0 Figure K-1. ACM-over-Satellite – Generic Example Appendix K K–5 MN-CDM-425...
Page 686 CDM-425 Advanced Satellite Modem Revision 0 BLANK PAGE Appendix K K–6 MN-CDM-425...
Page 687: An Existing Satellite Acm Scheme
CDM-425 Advanced Satellite Modem Revision 0 An Existing Satellite ACM Scheme The best-known scheme for ACM-over-Satellite is addressed in the DVB-S2 specification (EN 302307) ratified by ETSI in March 2005. Hughes Network Systems (Germantown, MD) has commercially deployed DVB-S2 with ACM-over-Satellite.
Page 688: Versafec Acm
CDM-425 Advanced Satellite Modem Revision 0 VersaFEC ACM VersaFEC, in concert with a novel ACM approach, addresses some of the shortcomings of DVB- S2 outlined above. VersaFEC covers a family of 18 short-block LDPC ModCods, specifically designed for low latency and ACM applications.
Page 689 CDM-425 Advanced Satellite Modem Revision 0 Table K-1. The VersaFEC ModCod Set Typical Max. Data Min. Data Eb/No, for Spectral Rate, Latency at Code Block size, Rate, ModCod Modulation efficiency, BER = 5 x Rate kbits 64 kbps (ms) CCM mode...
Page 690: Versafec Acm Latency
CDM-425 Advanced Satellite Modem Revision 0 Figure K-2. VersaFEC Codes vs. Constrained Capacity Note that SNR is used in place of Eb/No – a convention for comparing ACM ModCods. SNR is defined as Eb/No + 10 (Spectral Efficiency). VersaFEC ACM requires the appropriate FAST code for the maximum operating symbol rate.
Page 691 CDM-425 Advanced Satellite Modem Revision 0 Table K-2. VersaFEC Implementation of ACM – 100 ksymbols/sec Example Case Minimum Latency, Spectral efficiency, ModCod Modulation Code Rate Bit rate (throughput) bps/Hz In milliseconds BPSK 0.488 0.49 49 kbps QPSK 0.533 1.07 107 kbps QPSK 0.631...
Page 692: Configuring Versafec Acm
CDM-425 Advanced Satellite Modem Revision 0 K.6.2 Configuring VersaFEC ACM Chapter 6. FRONT PANEL OPERATION. VersaFEC ACM requires the appropriate FAST code for the maximum operating symbol rate. To access the IP, IP-ACM, or V2-ACM mode, make sure the CnC mode is set to ON or OFF, since access is not available when the CnC mode is set to APC.
Page 693 CDM-425 Advanced Satellite Modem Revision 0 Step Task Front Panel VFD Mnemonic In all case except MEO (which is a very unusual mode) the mode is fixed at AUPC-ACM Mode = Normal (Normal, +/- Track) Normal. Enter the maximum permitted Max Permitted Power Increase: 3.0 dB ()
Page 694 CDM-425 Advanced Satellite Modem Revision 0 Step Task Front Panel VFD Mnemonic Target Eb/No margin: This is a VERY important parameter. The ACM system is Target Eb/No Margin = 1.0 dB (0.0 – 4.5) designed to switch based on thresholds ()
Page 695 CDM-425 Advanced Satellite Modem Revision 0 The Figure K-3 graph shows the switch points with the Target Eb/No margin set to 0dB. However, the switch points can be moved (increased) by configuring the Target Eb/No margin parameter, which can vary from 0 to 4.5 dB, in 0.5dB steps. In a fading environment, it is strongly...
Page 696: Versafec-2 Acm And Ccm
CDM-425 Advanced Satellite Modem Revision 0 VersaFEC-2 ACM and CCM Comtech EF Data’s second generation VersaFEC-2 comprises 74 new ModCods, with a new family of constellations. • VersaFEC-2 has two modes: Long Block – Maximum coding gain with higher latency.
Page 697 CDM-425 Advanced Satellite Modem Revision 0 Table K-3. The VersaFEC-2 ModCod Set – Long Block Typical * Latency Min. Max. Min Sym Max Sym Spectral Block Es/No Code Data Rate, Data Rate, Rate, ACM Rate, ACM ModCod Modulation efficiency, size,...
Page 698 CDM-425 Advanced Satellite Modem Revision 0 Table K-4. The VersaFEC-2 ModCod Set – Short Block Typical * Latency Min. Max. Min Sym Max Sym Spectral Block Es/No Code Data Rate, Data Rate, Rate, ACM Rate, ACM ModCod Modulation efficiency, size,...
Page 699 CDM-425 Advanced Satellite Modem Revision 0 Note that Es/No (SNR) is used in place of Eb/No, a convention for comparing ACM ModCods. SNR is defined as: Es/No = Eb/No + 10 * log (Spectral Efficiency) Figure K-4. VersaFEC-2 Codes vs. Constrained Capacity (typical values shown) Appendix K K–19...
Page 700: Versafec-2 Acm Latency
CDM-425 Advanced Satellite Modem Revision 0 K.7.1 VersaFEC-2 ACM Latency Section M.6.1 addresses latency in VersaFEC ACM mode. The analysis for VersaFEC-2 is proceeds identically. The following table shows a summary for both VersaFEC-2 Long and Short Block modes: Table K-5. VersaFEC-2 End-to-End Latency @ 100 ksps...
Page 701: Configure Versafec-2 Acm
CDM-425 Advanced Satellite Modem Revision 0 K.7.2 Configure VersaFEC-2 ACM Chapter 6. FRONT PANEL OPERATION. VersaFEC-2 ACM requires the plug-in Option Card, and the appropriate FAST code for the maximum operating symbol rate. Do these steps to configure the VersaFEC-2 ACM operation using the front panel:...
Page 702 CDM-425 Advanced Satellite Modem Revision 0 Step Task Front Panel VFD Mnemonic (SELECT) CONFIG: RX  FEC RxIF Freq FEC Demod Symb Descram Eq EbNo Set the Rx FEC type as VersaFEC-2 Long, or (Data 02048.000kbps,02184.533ksps)() VersaFEC-2 Short Block. Note that this does not have to match the Tx FEC type.
Page 703: Monitoring Acm Performance
CDM-425 Advanced Satellite Modem Revision 0 Monitoring ACM Performance The CDM-425 Advanced Satellite Modem provides several ways to determine the current state of the ACM system. Use the front panel menu to select MONITOR: ACM. The current Tx and Rx ModCod, along with the Local and Remote SNR, are displayed here.
Page 704: K.10 Using Acm With Aupc
CDM-425 Advanced Satellite Modem Revision 0 Figure K-5. ACM Congestion Control The WAN FIFO (the size of which is configurable in the IP Switch setup) produces two control signals that enable and disable the sending of Ethernet Pause Frames, which are Ethernet frames designed to implement flow control at the MAC layer.
Page 705: K.11 Notes And Recommendations
• The ACM controller algorithm that resides in the CDM-425 Advanced Satellite Modem exhibits a different response depending on whether SNR is increasing or decreasing. If the SNR is improving, the ACM controller switches to higher ModCods sequentially until the highest possible ModCod has been reached.
Page 706 For VersaFEC, the value of Max ModCod may be limited by other FAST codes installed in the CDM-425. For example, suppose the 4100 ksps FAST option is installed, and the symbol rate set to 4100 ksps, the theoretical maximum data rate would be 14 Mbps at ModCod 11.
Page 707: K.12 Summary Of Specifications
CDM-425 Advanced Satellite Modem Revision 0 K.12 Summary of Specifications K.12.1 VersaFEC ACM Adaptive Coding and Modulation, using BPSK, QPSK, 8-QAM, 16-QAM and System Type VersaFEC short-block LDPC coding - total of 12 ModCods Symbol Rate Range 37 ksps to 4100 ksps...
Page 708 CDM-425 Advanced Satellite Modem Revision 0 Table K-6. VersaFEC ACM ModCods Typical Spectral Min. Data Rate, Max. Data Rate, Modulation Code Rate Eb/No, for Efficiency, bps/Hz ACM mode ACM mode BER = 5 x 10 BPSK 0.488 0.49 2.4 dB 18.1 kbps...
Page 709: Versafec-2 Acm
CDM-425 Advanced Satellite Modem Revision 0 K.12.2 VersaFEC-2 ACM Adaptive Coding and Modulation, using BPSK, QPSK, 8-ARY, 16-ARY, 32-ARY and System Type VersaFEC-2 Short-block and Long Block LDPC coding - total of 74 ModCods Symbol Rate Range 37 ksps to 12.5 Msps (Long)
Page 710 CDM-425 Advanced Satellite Modem Revision 0 BLANK PAGE Appendix K K–30 MN-CDM-425...
Page 711: Appendix L. Ip Sub-Mux
IP traffic is two-fifths the primary, or 2.5 times the primary 3/7 or 7/3 IP traffic is three-sevenths the primary, or 2.33 times the primary 1/2 or 2 IP traffic is one-half the primary, or 2 times the primary Appendix L L–1 MN-CDM-425...
Page 712: Data Rate Vs. Composite Rate
The Sub-Mux frame does contain a very small overhead required for acquisition and identification of primary vs. IP data: As this overhead is taken from the "IP info rate" rather than the primary data rate, actual IP throughput will be slightly reduced. Appendix L L–2 MN-CDM-425...
Page 713: Appendix M. Quality Of Service (Qos
– Layer 2 QoS and Layer 3 QoS: • Layer 2 QoS is available on the CDM-425 Advanced Satellite Modem by default when the optional IP Packet Processor card is either not installed, or is installed but disabled. Layer 2 QoS is based on OSI model Layer 2 header parameters such as IEEE 802.1q VLAN priority field, and is also based on the CDM-425’s physical Ethernet port.
Page 714: Layer 2 Qos
Layer 2 QoS Tx bandwidth can be set near to the modem’s data rate. Table M-1 lists the step sizes for both CDM-425 hardware versions. Note that the Layer 2 QoS scheduling algorithm runs on the basis of QoS Tx data rate; however, the modem can send only the modem Tx data rate.
Page 715: Flow Control
64 Kbps, which is 196 Kbps. M.2.2 Flow Control In Layer 2 QoS mode, the CDM-425 supports Ethernet-based pause frame control (IEEE 802.3). Flow control can be enabled or disabled independently in any of the LAN ports. M.2.3 Port-based Layer 2 QoS When selecting Port-based Layer 2 QoS, each port’s priority is configurable to a QoS queue...
Page 716 CDM-425 Advanced Satellite Modem Revision 0 QoS Example 3 SETUP: • Port-based Layer 2 QoS mode is selected. • Port Layer 2 QoS Priorities are set as follows: Port 1 priority is set to 1 Port 2 priority is set to 2...
Page 717: Vlan-Based Layer 2 Qos
CDM-425 Advanced Satellite Modem Revision 0 M.2.4 VLAN-based Layer 2 QoS When selecting VLAN-based Layer 2 QoS, the priority field is extracted from the 802.1q VLAN tag, as shown in Figure M-1. The VLAN tag priority field is 3 bits, so the 802.1q protocol supports eight priorities, from 0 to 7.
Page 718 CDM-425 Advanced Satellite Modem Revision 0 QoS Example 4 SETUP: • VLAN-based Layer 2 QoS mode is selected. • The modem data rate is set to 1 Mbps. • Four streams of VLAN ingress traffic is sent to the modem with VLAN Priorities set to 7, 5, 3, and 1, respectively.
Page 719 CDM-425 Advanced Satellite Modem Revision 0 QoS Example 5 SETUP: • Port- and VLAN-based Layer 2 QoS mode is selected. • Port Layer 2 QoS Priorities are set as follows: Port 1 priority is set to 1 Port 3 priority is set to 3 Ports 2 and 4 priorities are set to trunk mode (native disabled) •...
Page 720: Layer 3 Qos
CDM-425 Advanced Satellite Modem Revision 0 Layer 3 QoS Layer 3 QoS scheduling operates on modem Tx bandwidth with 1-byte resolution, so there is further trimming or clipping data rate after the QoS scheduler. Layer 3 QoS is implemented with at least one 1-second burst at maximum data rate. So Layer 3 QoS can process much larger bursts than Layer 2 QoS.
Page 721 CDM-425 Advanced Satellite Modem Revision 0 QoS Example 6 SETUP: • Max-Pri Layer 3 QoS mode is selected. • Modem Tx bandwidth is set to 2048 Kbps (E1 rate). • The Max-Pri QoS rules are configured as follows: Dest VLAN...
Page 722: Layer 3 Qos Min-Max Mode
CDM-425 Advanced Satellite Modem Revision 0 M.3.2 Layer 3 QoS Min-Max Mode In Min-Max mode, up to 32 QoS rules can be configurable using source IP subnet, destination IP subnet, source port range, destination port range, and protocol. For each created rule, you can also set the QoS treatment, such as guaranteed minimum bandwidth, maximum clipping bandwidth, WRED enable or disable, and filter rule.
Page 723 CDM-425 Advanced Satellite Modem Revision 0 QUESTION: What are the total output data rates and the individual stream data rates? ANSWER: • In Min-Max QoS mode, other than the default rule, which is configured as Priority 9, all QoS rules are configured as Priority 8.
Page 724: Layer 3 Qos Diffserv Mode
CDM-425 Advanced Satellite Modem Revision 0 M.3.3 Layer 3 QoS DiffServ Mode Layer 3 DiffServ QoS is fully compliance to RFC standards. When the Layer 3 QoS mode is set to DiffServ, the system automatically configures the rules with DSCP code points, priority values, and WRED.
Page 725: Layer 3 Qos List Of Supported Rfcs (Requests For Comment
CDM-425 Advanced Satellite Modem Revision 0 • The resulting individual data rates are as follows: PHB / DSCP Drop Stream Priority Service Rate Data Rate Code Precedence Management CS7 / b111000 200 Kbps 9.8 Mbps 200 Kbps Networking CS6 / b110000 800 Kbps 9.0 Mbps...
Page 726: Qos With Adaptive Coding And Modulation (Acm
CDM-425 Advanced Satellite Modem Revision 0 QoS with Adaptive Coding and Modulation (ACM) When ACM is enabled, the modem is configured with symbol rate. However, while the QoS system recognizes data rate, both Layer 2 QoS and Layer 3 QoS operate on data rate. Therefore, while the symbol rate will be constant in ACM mode, the data rate will not be constant.
Page 727 CDM-425 Advanced Satellite Modem Revision 0 Input Data Leftover BW (After QoS Output Stream Priority PHB / DSCP Code Rate Serving the Queue) Data Rate Management CS7 / b111000 200 Kbps 9.8 Mbps 200 Kbps Networking CS6 / b110000 800 Kbps 9.0 Mbps...
Page 728 CDM-425 Advanced Satellite Modem Revision 0 Notes: Appendix M M–16 MN-CDM-425...
Page 729: Appendix N. Transmit Spectrum Filtering Options
(particularly with non-round constellations). A White Paper that is to be published by Comtech EF Data after the initial release of the CDM-425 will offer precise guidelines on the amount of additional output backoff (OBO) that is required for these new rolloffs.
Page 730 If these rules are followed, then the amount of degradation due to mismatch will be < 0.05 dB. If these rules are not followed, then the amount of degradation due to mismatch can be > 0.3 dB. Appendix N N–2 MN-CDM-425...
Page 731: Appendix O. Radius Client
Appendix O. RADIUS CLIENT Overview Ethernet-based remote monitor and control (M&C) of the CDM-425 Advanced Satellite Modem is available through the HTTP (Web Server) Interface, SNMP, and through the issuance of remote commands and queries via Telnet. For CDM-425 Advanced Satellite Modems that are equipped with the Optional IP Packet Processor, additional remote M&C access is available via the Telnet Command Line Interface...
Page 732: Service Types
Response” message as defined in RFC 2865. This attribute indicates the type of service the user has requested, or the type of service to be provided. The CDM-425 Advanced Satellite Modem RADIUS client recognizes the following value fields, as assigned to the service type attribute in RADIUS: Access-Accept messages received from the RADIUS server, and sets access levels accordingly: Table O-1.
Page 733 Upon receiving the “HTTP GET” request, the CDM-425 Advanced Satellite Modem checks whether the user has been authenticated. If not, the modem returns “HTTP 401 Unauthorized” message to the User PC. The User PC transmits the login credentials to the CDM-425 Advanced Satellite Modem using the “HTTP GET” message.
Page 734: Radius Operation And Configuration
C. Upon receiving the RADIUS: Access-Challenge message, it transmits the “PAP/CHAP challenge response” message to the Radius Server. Upon receiving the “HTTP 201 OK” message, the user can browse the CDM-425 Advanced Satellite Modem HTTP (Web Server) Interface pages. Depending on the user access rights received from the RADIUS server, the CDM-425 Advanced Satellite Modem allows the user Read-only or Read-Write access to the interface.
Page 735 Configuration of RADIUS features is possible only through the HTTP (Web Server) Interface Admin | Access page, or by issuance of remote commands via Telnet. No configuration of RADIUS is available from the CDM-425 Advanced Satellite Modem front panel or through serial- based remote commands, SNMP, or the Telnet CLI.
Page 736: Radius Operation Using The Front Panel
Refer to Chapter 6. FRONT PANEL OPERATION for instructions on how to use RADIUS using the modem's front panel. • Access to and operation of the CDM-425 Advanced Satellite Modem Front Panel is not controlled by RADIUS. • Control of RADIUS operations from the front panel is limited only to enabling and disabling the feature.
Page 737: Appendix P. Ftp Modem-To-Modem Configuration
MODEM CONFIGURATION Overview Comtech EF Data provides the means, using File Transfer Protocol (FTP), to quickly “clone” the configuration of a “source” CDM-425 Advanced Satellite Modem (Modem ‘A’) to any “target” CDM- 425 Advanced Satellite Modem (Modem ‘B’) on a per-modem basis. This allows consistent network setup with minimum effort.
Page 738: Perform The Ftp Modem Configuration Procedure
Type "ftp xxx.xxx.xxx.xxx" without quotes (where xxx.xxx.xxx.xxx is the Source Modem Traffic/Management IP Address). If you are using a CDM-425 Advanced Satellite Modem and you have installed and enabled the optional IP Packet Processor, use of FTP is restricted to users with Administrator privileges. You will be prompted to type in the Admin User Name and Password (the default for both is ‘comtech’) before you can continue.
Page 739: Use The Modem Configuration File To Configure A Target Modem
CDM-425 Advanced Satellite Modem Revision 0 • Type "get config:config_file" without quotes at the Command-line ftp> prompt, and then press the Enter key to begin the file creation. You will observe the progress similar to this example: 200 Port OK...
Page 740 Type "ftp xxx.xxx.xxx.xxx" without quotes (where xxx.xxx.xxx.xxx is the Target Modem Traffic/Management IP Address). If you are using a CDM-425 Advanced Satellite Modem and you have installed and enabled the optional IP Packet Processor, use of FTP is restricted to users with Administrator privileges.
Page 741 (<0/IPA? {CR}{LF}) to report back the result: >0/IPA=192.168.001.091.24 (example) The CDM-425 Advanced Satellite Modem Target Modem is now configured to operate identically to the CDM-425 Advanced Satellite Modem Source Modem. The FTP Modem-to-Modem Configuration procedure is now complete.
Page 742 CDM-425 Advanced Satellite Modem Revision 0 Notes: Appendix P P–6 MN-CDM-425...
Page 744 2114 85281 WEST TH STREET TEMPE ARIZONA 480 • 333 • 2200 PHONE 480 • 333 • 2161...

Comtech EF Data CDM-425 Installation And Operation Manual

Preface

About this Manual

Conventions and References

Safety and Compliance

Product Support

Comtech EF Data Headquarters

Warranty Policy

Chapter 1. Introduction

Overview

Functional Description

Features

Summary of Specifications

Chapter 2. Installation

Unpack and Inspect the Shipment

Modem - Rack Enclosure Installation

Modem Configuration

Verify Modem Operation

Connect the External Cables

Chapter 3. Rear Panel Connectors and Pinouts

Cabling Connection Types

Cabling Connections

Ground and Power Connections

Chapter 4. Update Firmware

Update Firmware Via the Internet

About Firmware Files, Naming, Versions, and Archive Formats

Ethernet FTP Upload Procedure

Chapter 5. Fast Activation Procedure

Overview

FAST Activation Procedure

Chapter 6. Front Panel Operation

Overview

SELECT: (Main) Menu

Quick Links

Installation and Operation Manual

Related Manuals for Comtech EF Data CDM-425

Summary of Contents for Comtech EF Data CDM-425