Page 1 Comtech EF Data is an AS9100 Rev B / ISO9001:2000 Registered Company Vipersat CDM-570/570L Satellite Network Modem Router User Guide MN/22125 Revision 1...
Page 3: User Guide
Vipersat CDM-570/570L Satellite Network Modem Router User Guide Part number MN/22125 Document Revision 1 Firmware Version 1.6.11/2.6.11 November 8, 2012...
Page 4 Revision: 1 Firmware Version: 1.6.11/2.6.11 ©2012 by Comtech EF Data, Inc. All rights reserved. No part of this manual may be copied or reproduced without prior written permission of Comtech EF Data, Inc. IMPORTANT NOTE: The information contained in this document supersedes all previously published information regarding this product.
Page 5: Document Revision History
Document Revision History Revision Date Description 1/16/08 Revisions for firmware version 1.5.4. Document part number changed from 22125 to MN/22125. 11/08/12 Update content to reflect NP v1.6.11/2.6.11. New Features: Dynamic Entry Channel Mode (ECMv2).
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Page 7: Table Of Contents
Network Role ....2-3 Slot Preamble Length ..3-18 Setting Vipersat CDM-570/570L Operating Slot Data Length ... 3-18 Parameters .
Page 8 Delay for Demod ... 3-48 Receive Coding Rate ..3-67 Vipersat CDM-570/570 L U s e r G u i d e...
Page 9 Receive Modulation Type ..3-67 ToS Remarking ... . B-21 Vipersat Summary ... . . 3-67 ToS to DSCP Value Conversions .
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Page 11: List Of Figures
List of Figures Chapter 2 Figures Figure 3-26 Remote SCPC Data Rate and Switch Type prompt .....3-24 Figure 3-27 Global SCPC Data Rate prompt .3-24 Figure 2-1 Main Menu screen.
Page 12 Figure A-4 IP Address Classes A, B, C ..A-7 Figure B-21 ECMv2 Processing Diagram . . . B-34 Figure A-5 NAT Router Example ...A-8 Vipersat CDM-570/570L User Guide...
Page 13 Appendix C Figures Figure C-1 Data Rate to Power Relationship, DPC Figure C-2 Excessive Max Power Example . . .C-6 Figure C-3 DPC Configuration screen, CLI . . .C-9 Figure C-4 DPC dialog, Parameter Editor . . .C-10 Figure C-5 DPC Calculate Max Power screen, CLI C-12 Figure C-6 DPC Calibration dialog, Parameter Editor .
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Page 15: List Of Tables
List of Tables Chapter 2 Tables Table 2-1 CDM-570/570L Network Roles and Functions ......2-3 Table 2-2 Vipersat Feature Configuration ..2-6 Appendix B Tables Table B-1 STDMA ACK Message .
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Page 17: How To Use This Manual
H A P T E R ENERAL How to Use This Manual This manual documents the enhanced Vipersat features and functions of the CDM-570/570L Satellite Network Modem Router, and guides the user in how to configure this product for use in a Vipersat network. The material covered addresses only those areas specific to a CDM-570/570L running in Vipersat mode, and complements the universal features and functions described in the CDM-570/570L Installation and Operation Manual.
Page 18: Chapter 3 - Using The Command Line
H o w t o U s e T h i s M a n u a l Chapter 3 — Using the Command Line Interface (CLI) Describes the use of the CLI for configuring and monitoring the CDM-570/ 570L in a Vipersat network. Each CLI screen is presented along with a detailed description and related commands.
Page 19 • CDD-564L Quad Demodulator Installation and Operation Manual (Part Number MN/CDD564L.IOM) • Vipersat CDD-56X Series User Guide (Part Number MN/22137) • Vipersat CDM-570/L, CDD-56X Parameter Editor User Guide (Part Number MN-0000038) • Vipersat Management System User Guide (Part Number MN/22156) •...
Page 20: Product Description
P r o d u c t D e s c r i p t i o n Product Description Introduction The Vipersat CDM-570 and CDM-570L (L-band) Satellite Network Modem Routers offer state of the art performance and reliability in a sophisticated and cost-effective 1RU package. The CDM-570/570L integrates router functionality into the modem, completely eliminating external serial port cabling, and allow- ing connection of a 10/100 Base-T LAN/WAN directly to the modem.
Page 21: Network And Bandwidth Management
P r o d u c t D e s c r i p t io n • Multi-Transponder Mode (MTM) Functions • Dynamic Power Control (DPC) for Environment or Mesh Links • Upstream Bandwidth Management Switching for Application, Load, Scheduled, Manual, or VESP •...
Page 22: Turbo Product Coding
P r o d u c t D e s c r i p t i o n Turbo Product Coding The Comtech Vipersat CDM-570/570L incorporates a Turbo Product Codec (TPC). TPC is an FEC technique that delivers significant performance improve- ment when compared to Viterbi with concatenated Reed-Solomon.
Page 23: New In This Release
P r o d u c t D e s c r i p t io n New in this Release The following firmware versions incorporate a number of additional features and enhancements. 1.6.11/2.6.11 Release Dynamic Entry Channel Mode Dynamic ECM (ECMv2) utilizes a modified slotted Aloha method for Remotes to establish registration in the network and obtain the means for switching into SCPC mode.
Page 24: Customer Support
C u s t o m e r S up p o r t Customer Support Contact Information Contact Comtech Vipersat Networks Customer Support for information or assistance with product support, service, or training on any Vipersat product. Mail: 3215 Skyway Court Fremont, CA 94539 Phone: 1+510-252-1462 ext.
Page 25: Quick Start Configuration
570L Modem/Router that is necessary in order for the equipment to function in a Vipersat network. The Vipersat CDM-570/570L stores its configuration in an ASCII file named the PARAM (parameter) file. Equipment configuration is typically performed through the use of the Command Line Interface (CLI), particularly the initial configuration.
Page 26: Initial Configuration
I n i t i a l C o n f i gu r a t i o n Caution: Do not connect the TX cable until the modem is properly configured, and the Home State is verified and Saved. Caution: Do not connect the TX and RX cables to test equipment without the use of a DC voltage block.
Page 27: Network Role
Setting Vipersat CDM-570/570L Operating Parameters The following is an example of using the CLI to bring a Vipersat CDM-570/ 570L with factory default settings to the configuration which allows the Viper- sat functions to be accessible. Set the Feature Configuration...
Page 28: Figure 2-1 Main Menu Screen
I n i t i a l C o n f i gu r a t i o n Use the following procedure to configure a CDM-570/570L to the network role it is to fill in a Vipersat network. From the Main Menu shown in figure 2-1, select the Administration command by entering A at the command prompt.
Page 29: Figure 2-3 Feature Configuration Screen
I n i t i a l C o n f i g u r a t io n From the Feature Configuration menu shown in figure 2-3, verify whether or not the Vipersat Feature Codes are Available (appears as shown in the figure).
Page 30: Set The Ip Address
I n i t i a l C o n f i gu r a t i o n Figure 2-5 Working Mode dialog When the reboot is completed, return to the Feature Configuration screen and configure the settings for Vipersat STDMA and Auto Switching according to the table below.
Page 31: Configure The Route Table
I n i t i a l C o n f i g u r a t io n Figure 2-6 Ethernet Interface screen Enter I at the command prompt, and enter the designated IP address for this unit. Save the settings to flash by entering S at the command prompt. Configure the Route Table Routing in a Vipersat Network CDM-570/570L Modem Routers operating in Vipersat mode do not use the...
Page 32: Creating The Routes
I n i t i a l C o n f i gu r a t i o n Class B in half and points the upper half toward the satellite there will be over 16000 usable addresses at the Hub as well as at the Remotes. For details on IP addressing, refer to Appendix A, "Network Addressing".
Page 33: Figure 2-7 Configuring The Route Table Screen
I n i t i a l C o n f i g u r a t io n Figure 2-7 Configuring the Route Table screen In a Hub configuration, the default route will typically point to a router on the same LAN as the CDM-570/570L Hub unit.
Page 34: Set The Satellite Modem Configuration
I n i t i a l C o n f i gu r a t i o n Address must be defined also. Otherwise, this route is automatically cre- ated and can be viewed with the Display command. Enter S at the command prompt in figure 2-7 to save the settings to flash. Set the Satellite Modem Configuration Enter M from the Main Menu, then enter C from the Satellite Modem menu to access the Configuration screen.
Page 35: Set The Vipersat Configuration
I n i t i a l C o n f i g u r a t io n Set the Vipersat Configuration Enter V at the Main Menu command prompt shown in figure 2-1 to select the Vipersat Configuration menu shown in figure 2-9. Figure 2-9 Vipersat Configuration screen (Hub) Enter R at the command prompt to toggle the Unit Role to either Hub or...
Page 36 Refer to Chapter 3, “Using the Command Line Interface,” for additional details on configuring the target Vipersat CDM-570/570L. V i p e r s a t C D M - 5 7 0 / 5 7 0 L U s e r G u i d e...
Page 37: Using The Command Line Interface
H A P T E R SING THE OMMAND NTERFACE (CLI) General This chapter describes the use of the CLI for configuring and monitoring the CDM-570/570L Modem Router in a Vipersat network. Each CLI screen related to a CDM-570/570L operating in Vipersat mode is presented, along with a detailed description of the available commands.
Page 38: Common Screen Commands
G e n e r a l Common Screen Commands The following commands appear on each of the menu screens: Save Parameters to Permanent Storage To Save the current parameter settings to permanent storage, enter S at the command prompt. This command saves all data that has been entered from any of the CLI screens since the last save was executed.
Page 39: Menu Descriptions
Operating Parameters” on page 2-3. Figure 3-1 Main Menu screen A Vipersat CDM-570/570L is normally shipped with the Vipersat option enabled. You can verify the CDM-570/570L configuration by checking that the command line Vipersat Configuration is displayed on the menu as shown in Figure 3-1.
Page 40: Figure 3-2 Administration Screen
M e n u D e s c r i p t i o n s Figure 3-2 Administration screen Ensure that the Working Mode is set to Router-Vipersat. If it is not, enter C at the command prompt and change the setting by selecting 4, as shown in figure 3-3.
Page 41: Feature Configuration
M e n u D e s c r i p t i o n s Feature Configuration The Feature Configuration screen shown in figure 3-4 allows the Enabling and Disabling of the major Vipersat CDM-570/570L features. Figure 3-4 Feature Configuration screen Use this menu to enable and disable Vipersat features such as: •...
Page 42: Vipersat Management
Vipersat STDMA In order to utilize the Vipersat STDMA feature (burst mode) in the target Vipersat CDM-570/570L, this feature must be Enabled. Enter A at the command prompt to toggle On or Off. Refer to table 2-2 for the relationship between Unit Role and STDMA. For a Hub STDMA Burst Controller or a Remote STDMA modem, this feature must be Enabled.
Page 43: Vipersat File Streamer
M e n u D e s c r i p t i o n s See the section “STDMA/SCPC Automatic Switching” on page 3-31 for more details on the use of this feature. For additional information, refer to Appendix B, “Automatic Switching,”.
Page 44: Vipersat Configuration
Figure 3-6 Vipersat Configuration screen (Hub) This menu lists the available commands for configuring a Vipersat CDM-570/ 570L. Note that for the Hub modem only, the command Primary Heart Beat is displayed in the Vipersat Configuration screen. For the Remote modem only, the status of the Home State Revert setting is displayed.
Page 45: Stdma
V i p e r s a t C o n f i g u r a t io n Figure 3-7 STDMA screen (Hub, Dynamic Cycle type) Figure 3-8 STDMA screen (Remote) STDMA This menu item is read-only and shows the current state of STDMA in the CDM-570/570L.
Page 46: Hub Type
V i p e r s a t C o nf i g u r a t i o n Hub Type This menu item is only displayed if the CDM-570/570L is being used as a Hub in the network, and provides the functionality for the STDMA Burst Controller. Vipersat STDMA has six modes of operation: •...
Page 47: Fixed
V i p e r s a t C o n f i g u r a t io n 1 – Fixed In the Fixed mode, all remotes have the same data slot size regardless of type of traffic or load. This mode minimizes the amount of jitter between remote trans- mission times, and is useful for tuning STDMA as well as for troubleshooting purposes.
Page 48: Entry Channel
V i p e r s a t C o nf i g u r a t i o n The GIR setting for each Remote is specified using the STDMA Remote Poli- cies screen (refer to the section “Set Remote Policies” on page 3-22). When combined with Auto switching, GIR allows trigger points to be set where the Remote will jump out into SCPC mode.
Page 49: Ecmv2 Mode
V i p e r s a t C o n f i g u r a t io n until it registers with the VMS and receives assignment into dSCPC, or until all necessary transactions are completed. The slot is then released for use by another Remote unit that is attempting to enter the channel.
Page 50: Group Id
V i p e r s a t C o nf i g u r a t i o n Group ID The STDMA Group ID number defines a group of equipment (Hub and Remote units) that will respond to the output of a single STDMA burst control- ler.
Page 51: Low Data Rate Fast Acquisition
V i p e r s a t C o n f i g u r a t io n Figure 3-12 STDMA Max Power Hunt prompt Low Data Rate Fast Acquisition Configurable on a Hub Burst Controller only. This menu item is a toggle used to Enable or Disable the Vipersat Burst Fast Acquisition Timing (BFAT) feature that functions at low data rates (64 kbps to 256 kbps).
Page 52: Outbound Ip
V i p e r s a t C o nf i g u r a t i o n Figure 3-13 Burstmap Multicast IP prompt Outbound IP This menu item, which appears for all Hub configurations, displays the current Outbound IP address.
Page 53: Slot Guardband
V i p e r s a t C o n f i g u r a t io n For Dynamic Cycle and GIR configurations, the number of cycles is automati- cally set to one in order to ensure optimum performance for these Hub types. This parameter can be modified from the Hub CDM-570/570L by entering a C at the command prompt as shown in figure 3-15.
Page 54: Slot Preamble Length
V i p e r s a t C o nf i g u r a t i o n Slot Preamble Length This menu item, which appears in all Hub and Remote configurations, displays the current Slot Preamble size in milliseconds and bytes for the remotes in the group.
Page 55: Total Slot Count
V i p e r s a t C o n f i g u r a t io n • ECMv2 – Slot Data Length On a Hub unit, entering B and M at the command prompt brings up the dialogs for specifying the data length in milliseconds for the target CDM-570/570L, as shown in figure 3-18.
Page 56: Slot Cycle Length
V i p e r s a t C o nf i g u r a t i o n Slot Cycle Length This menu item is for information only and displays the Slot Cycle Length in milliseconds and bytes for the remotes in the group. This value represents the total amount of time—preamble, data length, and guardband—allocated to the remote modem during one spin cycle.
Page 57: Adding A Remote To The Stdma Group
V i p e r s a t C o n f i g u r a t io n The menu shown in figure 3-20 is used to define and make modifications to the Remotes that belong to the STDMA group for the Hub burst controller, as well as to display each Remote’s burstmap status information.
Page 58: Base
V i p e r s a t C o nf i g u r a t i o n • CF – This Remote has not sent an acknowledgement to the burst controller since it was enabled. Base Entering a B at the command prompt in figure 3-20 allows entering the Remote number to start displaying remotes in this menu screen.
Page 59: Figure 3-23 Stdma Remote Policies Screen
V i p e r s a t C o n f i g u r a t io n Figure 3-23 STDMA Remote Policies screen (GIR Hub) Entering the Remote number at the command prompt in figure 3-23 allows the Guaranteed Information Rate and the Automatic Load Switch Rate for that Remote to be set, as shown in figure 3-24.
Page 60: Figure 3-25 Entry Channel Switch Rates Screen
V i p e r s a t C o nf i g u r a t i o n Figure 3-25 Entry Channel Switch Rates screen Entering the Remote number at the command prompt in figure 3-25 allows the SCPC Data Rate and the Switch Type for that Remote to be set, as shown in figure 3-26.
Page 61: Delete Remote
V i p e r s a t C o n f i g u r a t io n Similarly, the Global Switch Type command can be used to set the switch type for all or a majority of the Remotes. Enter H at the command prompt. Figure 3-28 Global Switch Type prompt Delete Remote...
Page 62: Remove Timeout
V i p e r s a t C o nf i g u r a t i o n Figure 3-31 View Remote(s) screen The display is for information only and pressing any key will return the screen to the menu shown in figure 3-20. Remove Timeout Entering R at the command prompt shown in figure 3-20 will display the Remove Timeout dialog shown in figure 3-32.
Page 63: Lnb Lo Frequency
V i p e r s a t C o n f i g u r a t io n Figure 3-33 Remove Retry Timeout prompt When a Remote is removed from the STDMA group, as described in the section “Remove Timeout”...
Page 64: Satellite Frequency Conversion
V i p e r s a t C o nf i g u r a t i o n Enter B at the command prompt and specify the correct BUC Local Oscillator frequency (MHz) that this Remote will be transmitting. Figure 3-35 BUC LO Frequency prompt Satellite Frequency Conversion...
Page 65: Show Hub Statistics
V i p e r s a t C o n f i g u r a t io n Figure 3-37 STDMA Statistics screen (Hub) Figure 3-38 STDMA Statistics screen (Remote) The window of time that is used to average the accumulation of statistics can be set by entering W at the command prompt in the Hub screen, then entering the number of seconds (from 1 to 20).
Page 66: Figure 3-39 Hub Statistics Screen
V i p e r s a t C o nf i g u r a t i o n Figure 3-39 Hub Statistics screen Statistics in the received ACK from each Remote are monitored by the Burst Controller. These statistics report the fill status of the burst data slot for each Remote.
Page 67: Stdma/Scpc Automatic Switching
STDMA to SCPC mode by the VMS. STDMA/SCPC Automatic Switching One of the most powerful features of the Vipersat CDM-570/570L is the capa- bility to perform Automatic switching between STDMA mode and SCPC mode based on bandwidth demand. The configuration options that are available to meet customer-specific requirements are extensive, and include switching based on Load, Application (Voice and Video RTP), ToS, and QoS.
Page 68: Auto Switching
V i p e r s a t C o nf i g u r a t i o n Figure 3-40 STDMA/SCPC Auto Switching screen (Hub) Load switching is controlled by both the Hub and the Remote, and thus related commands appear in both screens.
Page 69: Current Wan Transmit Mode
STDMA or SCPC mode. Voice & Video Application Switching One of the four automatic switching functions that the Vipersat CDM-570/570L is able to perform is Application Switching. The Vipersat CDM-570/570L provides application switching for non-encrypted SIP and/or H.323 traffic that is detected on the satellite network.
Page 70: Video Switch Detection
ToS Switch Detection This menu item appears for Remote modems only. One of the four automatic switching functions that the Vipersat CDM-570/570L is able to perform is ToS (Type of Service) Switching. ToS is defined by an eight bit field within an IP packet header that is used to set up per-hop-based QoS rules for prioritizing packets.
Page 71: Qos Switch Detection
QoS Switch Detection This menu item appears for Remote modems only. One of the four automatic switching functions that the Vipersat CDM-570/570L is able to perform is QoS (Quality of Service) Switching. The optional QoS capabilities available in each modem/router may be utilized whenever a modem will be handling high-priority traffic, such as video or voice.
Page 72: Configure Qos Rules
V i p e r s a t C o nf i g u r a t i o n Configure QoS Rules The Vipersat CDM-570/570L is capable of performing automatic switching based on the QoS rules for a Remote modem. QoS rules can be assigned to different flow types that are user-defined by any combination of traffic type protocol (FTP, UDP, RTP, etc.), source/destination IP (specific or range), and/...
Page 73: Figure 3-44 Qos Rules Configuration Screen, Max
V i p e r s a t C o n f i g u r a t io n The QoS mode that is chosen will determine the settable parameters for defining QoS rules. Enter Q at the command prompt in figure 3-42 to access the QoS Rules Config- uration screen.
Page 74: Configure Qos Rules Based Switching
V i p e r s a t C o nf i g u r a t i o n Configure the desired number of rules that are necessary for the applications to be used for this network. Refer to the CDM-570/570L Installation and Opera- tion Manual for details on configuring QoS Rules for the CDM-570/570L.
Page 75: Enable Wan Sar
Detection feature between Enabled and Disabled. Load Switching One of the four automatic switching functions that the Vipersat CDM-570/570L is able to perform is Load Switching. The system will detect variations in data rate and can be configured to switch from STDMA to SCPC based on band- width requirements.
Page 76: Stdma Slot Capacity
V i p e r s a t C o nf i g u r a t i o n affected by this setting. However, using Load switching for real-time applications is not recommended. STDMA Slot Capacity This menu item appears for Hub modems only. The STDMA Slot Capacity command allows setting the threshold or level of slot capacity at which the Burst Controller sends a switch request to the VMS to switch the Remote from STDMA mode to SCPC mode.
Page 77: Percent Allocation
V i p e r s a t C o n f i g u r a t io n Percent Allocation This menu item appears for Hub modems only. The Percent Allocation menu item allows adding a fixed percentage to the channel bandwidth request to accommodate additional bandwidth requirements which may occur after the switch is made from STDMA to SCPC mode.
Page 78: Scpc Step Down Threshold
V i p e r s a t C o nf i g u r a t i o n SCPC Step Down Threshold This menu item appears for Remote modems only. The SCPC Step Down Threshold establishes the percentage of bandwidth use that will trigger a switch down from the present SCPC rate to a lower rate to ensure efficient bandwidth usage.
Page 79: Scpc Step Up Excess
V i p e r s a t C o n f i g u r a t io n The SCPC Step Down Delay feature provides a switching delay period to ensure that a premature switch down in the SCPC rate does not occur due to a temporary fall in traffic.
Page 80: Time For Carrier Inhibit
V i p e r s a t C o nf i g u r a t i o n map containing a large number (up to 100) of remotes running in ECM mode where the burst period exceeds the Remote carrier inhibit timer. When implemented, this parameter is set at either the TDM outbound unit or a switched demod, not at the STDMA Controller, in order to prevent a problem should the burst controller be rebooted.
Page 81: Tos Switching Parameters
V i p e r s a t C o n f i g u r a t io n Note that this timer setting should be at least three times greater (longer in dura- tion) than the timer setting at the Hub to ensure that the network link is main- tained.
Page 82: Max Streams
V i p e r s a t C o nf i g u r a t i o n • Enter Name for TOS ID [ ] - At the prompt, enter a user-defined text label for circuit identification. •...
Page 83: View
V i p e r s a t C o n f i g u r a t io n Note: The value shown in the TOS Value column is the TOS ID associated with the ToS entry to be deleted. NOTE View Entering a V at the command prompt will display the Internal TOS Table for...
Page 84: Delay For Mod
V i p e r s a t C o nf i g u r a t i o n This screen will initially display all lock times as -1, indicating that Hitless Switching is currently disabled. To enable the Hitless Switching feature, enter R at the command prompt to restore default lock times.
Page 85: Sotm Mode
V i p e r s a t C o n f i g u r a t io n to its default gateway, specifying the new hop router for the Remote. This will ensure that the edge router has a current table of routes to all of the remote sites. Refer to the Vipersat VMS User Guide for implementation details.
Page 86: Expansion Unit
V i p e r s a t C o nf i g u r a t i o n Vipersat Configuration screen (figure 3-6), enter R to display the dialog shown in figure 3-66. Figure 3-66 Unit Role prompt The choice made in this command will determine the role the target CDM-570/ 570L will perform in the network and what type of commands and functions it will receive from the VMS.
Page 87: Network Id
V i p e r s a t C o n f i g u r a t io n Network ID The Network ID that is assigned to the unit defines to what network the target CDM-570/570L will belong. All units used in a network will have the same Network ID.
Page 88: Managing Ip Address
V i p e r s a t C o nf i g u r a t i o n When the CDM-570/570L receives a multicast from the VMS server, it receives maintenance and control packets, including the server’s IP address. The CDM-570/570L responds to the VMS server with a unicast containing its current configuration data, including the CDM-570/570L’s IP address.
Page 89: Management Security
V i p e r s a t C o n f i g u r a t io n Once the modem is registered, the I command is removed from the Vipersat Configuration menu. This managing address is automatically updated on a periodic basis for modems that are newly enabled, incorrectly set, or following VMS changeovers (redun- dancy switching).
Page 90: Figure 3-72 Vipersat Management Security Screen
V i p e r s a t C o nf i g u r a t i o n If the FAST feature key for Management Security has been purchased for the target modem, then it will appear as a menu item on the Vipersat Configuration screen (figure 3-6).
Page 91: Primary Heart Beat
V i p e r s a t C o n f i g u r a t io n Primary Heart Beat This menu item appears for the Hub modem only. The Primary Heart Beat feature is a redundancy heart beat message for primary Hub units that provides the option for a periodic communications check message to be sent from the Hub modem to the VMS for backup recovery in N:M redundancy (protected) configurations.
Page 92: Figure 3-74 Dpc Configuration Screen
V i p e r s a t C o nf i g u r a t i o n power levels. The information and commands in the menu will vary depending on the function that the target CDM-570/570L performs in the network. The screen shown in figure 3-74 is for a Hub or Remote operating in STDMA mode.
Page 93: Dpc Enabled
V i p e r s a t C o n f i g u r a t io n DPC Enabled The DPC Enabled command (enter E) is a toggle that allows the DPC feature to be either Enabled or Disabled. The CDM-570/570L is shipped with the DPC Enabled menu item turned off (Disabled) to allow entrance link levels calibra- tion during terminal setup.
Page 94: Calibrated Data Rate
V i p e r s a t C o nf i g u r a t i o n Calibrated Data Rate This menu item is for information only and displays the Calibrated Data Rate in kbps for the target CDM-570/570L. This value is pulled from the Home State, and is the base value data rate from initial configuration and commission- ing.
Page 95: Calculate Max Power
V i p e r s a t C o n f i g u r a t io n is recommended; although DPC will function using Viterbi, this type requires significantly more power to operate and is not recommended. Enter F at the command prompt to set this parameter.
Page 96: Target Dpc Address
V i p e r s a t C o nf i g u r a t i o n Enter Q at the command prompt in the DPC Configuration screen to display the Speed Up EbNo dialog shown in figure 3-78. The default value for this parameter is 5 dB.
Page 97: Baseline Power
V i p e r s a t C o n f i g u r a t io n BaseLine Power The BaseLine Power is an information only display, and is a function of the power given to the modem by the VMS for the last switch command based on link budget calculations.
Page 98: Set Current Configuration As Home State
V i p e r s a t C o nf i g u r a t i o n CDM-570/570L goes to a configuration which is optimum for its function in the network. Enter H at the command prompt in the Vipersat Configuration screen to display the Home State Configuration screen shown in figure 3-80.
Page 99: Force Modem To Home State
V i p e r s a t C o n f i g u r a t io n Force Modem to Home State If at any time it is desired to have a CDM-570/570L return to its Home State, this command (enter Y) can be executed.
Page 100: Transmit Fec Type
V i p e r s a t C o nf i g u r a t i o n Figure 3-83 Transmit Data Rate prompt Note that the valid range for this parameter will vary depending on the Modula- tion Type, Coding Rate, and FAST feature Data Rate.
Page 101: Transmit Modulation Type
V i p e r s a t C o n f i g u r a t io n Transmit Modulation Type Entering E at the command prompt to use the dialog shown in figure 3-86 to set the Transmit Modulation Type for the target CDM-570/570L’s Home State. Figure 3-86 Transmit Modulation Type prompt Transmit Power Level...
Page 102: Receive Data Rate
V i p e r s a t C o nf i g u r a t i o n Figure 3-88 Receive Frequency prompt Note that this screen dialog example displays the frequency range for the CDM- 570L L-Band modem. For the CDM-570, the range displayed will be either 50 to 90 MHz or 100 to 180 MHz.
Page 103: Receive Coding Rate
V i p e r s a t C o n f i g u r a t io n Receive Coding Rate Enter P at the command prompt to use the dialog shown in Figure 3-91 to set the Receive Coding Rate for the target CDM-570/570L’s Home State. Figure 3-91 Receive Coding Rate prompt Note that Coding Rates 3 (1/2), 4 (2/3), and 8 (1/1) are not valid selections when...
Page 104: Figure 3-93 Vipersat Summary Screen (Hub)
V i p e r s a t C o nf i g u r a t i o n Figure 3-93 Vipersat Summary screen (Hub) The Node ID number that appears in this screen verifies that the unit is regis- tered with the VMS and is active in the network.
Page 105: Vipersat Migration
V i p e r s a t C o n f i g u r a t io n Vipersat Migration The Vipersat Migration command is used to set the compatibility mode for the Hub Burst Controller when conducting a firmware upgrade on the associated CDM-570/570L Remotes.
Page 106: Alerts
V i p e r s a t C o nf i g u r a t i o n Caution: This command affects all communications for the VMS and STDMA. If the base address is changed, it must be changed in the VMS as well as in all modems in all networks controlled by the VMS.
Page 107: Network Addressing
P P E N D I X ETWORK DDRESSING Introduction This Appendix is an overview of network addressing and how it applies to configuring the CDM-570/570L for use in Vipersat Networks. The subjects covered are: • OSI Model • Binary Math •...
Page 108: The Osi Reference Model
T h e O S I R e f e r e n c e M o d e l The OSI Reference Model OSI is an acronym for Open Systems Interconnection. This is a network model created by ISO (the International Standardization Organization.) The OSI model is the basic standard which forms the basis for all networking protocols.
Page 109 T h e O S I R e f e r e n c e M o d e l Together, these two sub-layer protocols are responsible for moving packets on and off the network. Layer 3 / Network Layer – Layer 3 is responsible for routing packets through multiple networks.
Page 110: Binary Math
B i na r y Ma t h Binary Math Network devices communicate using BITS, where a bit is a single digit repre- sented by a 1 or a 0, or by using BYTEs, where a byte is made up of eight bits in any combination of 1’s or 0’s.
Page 111 B i n ar y M at h changed the numbering base (radix.) All digital processes are done in binary. The conversion to decimal is done whenever binary values need to be read or entered by humans as their decimal equivalents. A p p e n d i x N e t w o r k A d d r e s s i n g...
Page 112: Ip Addressing
I P Ad d r e s s i n g IP Addressing An IP (Internet Protocol) address is a unique set of numbers assigned to a device on a network to uniquely identify that device (by its IP address). An IP address is a unique number composed of four octets, with each octet separated by a dot.
Page 113: Class C
I P A d d r e s s in g • 16-bit network number • 16-bit node number CLASS A CLASS B CLASS C Address Address High- High- Octet Octet Networks Networks Hosts Hosts Class Class Order-Bits Order-Bits Decimal Range Decimal Range Available Available...
Page 114: Class E
I P Ad d r e s s i n g Class E • 240.0.0.0 to 255.255.255.255 • Reserved for experimental use and limited broadcast Private Network IP Addresses RFC 1918 defines blocks of addresses for use on private networks: •...
Page 115: Subnet Mask
I P A d d r e s s in g In the process of subnetting, bits are borrowed from the host ID portion of an IP address and are then given to the network ID. Then a “Subnet Mask” gets assigned to the host along with the IP address.
Page 116: Network Segments
I P Ad d r e s s i n g Dotted Decimal Dotted Decimal Address Address Binary Values Binary Values IP Address IP Address 192.168.2.66 192.168.2.66 11000000.10101000.00000010.01000010 11000000.10101000.00000010.01000010 Subnet Mask Subnet Mask 255.255.255.0 255.255.255.0 11111111.11111111.11111111.00000000 11111111.11111111.11111111.00000000 ANDing Result ANDing Result 192.168.2.0 192.168.2.0 11000000.10101000.00000010.00000000...
Page 117: Default Gateways
I P A d d r e s s in g Each of the four subnets can, in turn, support 64 members. The example subnet used above yielded 4 subnets, but you can use a different mask to meet the specific requirements of your network. Default Gateways A default gateway is a network device, usually a router, that is responsible for routing data packets out of the local network segment.
Page 118: Figure A-10 Network Node Mac Addresses
I P Ad d r e s s i n g • The first six characters are issued to the organization. • The second six characters are assigned to the hardware interface by manufacturing. Figure A-10 Network Node MAC Addresses V i p e r s a t C D M - 5 7 0 / 5 7 0 L U s e r G u i d e A-12...
Page 119: Automatic Switching
P P E N D I X UTOMATIC WITCHING General Automatic switching is a feature of the VMS that allows dynamically changing the network configuration in response to changes in either network traffic loads (Load switching), traffic type (Application switching), or Type of Service (ToS switching) detecting stamped packets with Diffserv values.
Page 120 G e n e r a l back to these intelligent modem/routers, effectively managing the Vipersat network operation in real time, and optimizing each site’s bandwidth usage to meet their QoS and cost requirements within their bandwidth allocation. The result is a stable satellite network connection that automatically responds to the customer’s requirements while continuously monitoring and reacting to chang- ing load, data type, and QoS requirements.
Page 121: Load Switching
L o a d S w i t c h in g Load Switching Overview There are three primary functional components involved in the load switching process. • Hub Controller(s)—These are the Hub units that provide the load switching detection mechanism for Remotes that are operating within the shared channel(s).
Page 122: Bandwidth Allocation And Load Switching By The Hub Stdma Burst Controller
L o a d S w i t c h i n g The basic concept for all load switching is that a running average of current utilization is maintained, and when that utilization exceeds a preset threshold, a switch is initiated. The data rate for the switch is computed by determining the current bandwidth requirement of the Remote, and adding some percentage of excess margin.
Page 123 L o a d S w i t c h in g Table B-1 STDMA ACK Message Data Size in Unit of Type Bytes Description Measure Notes IP Address of Remote Used by Remote to identify itself Unsigned Queued Bytes Bytes Total number of bytes queued since last cycle (includes...
Page 124 L o a d S w i t c h i n g • Dynamic Slot Mode – The slot size for each Remote is computed based on the time (at the current data rate) needed to transmit all the “Bytes in Queue”.
Page 125: Load Switching-Stdma Hub
L o a d S w i t c h in g Load Switching—STDMA Hub Before discussing how load switching is determined, it is necessary to explain the modem/router parameters that control the switch. Hub Switching Parameters The screens shown in figure B-1 (CDM-570/570L modem/router) and figure B-2 (SLM-5650A modem/router) are examples that show the entries in the Automatic Switching page at the Hub that are used to control load switch- ing.
Page 126: Hub Switching Process
L o a d S w i t c h i n g • Load Switching – This is a type of Automatic Switching that is based on the amount of traffic at a Remote. If this feature is not enabled, then no Remote in this STDMA group will be switched based on load.
Page 127: Load Switching-Remote
L o a d S w i t c h in g If the average bandwidth used exceeds the threshold percentage of available bandwidth, then a flag is set indicating a switch is pending. At this point, the statistics are reset and the traffic load is then computed for the time period spec- ified by the switch delay.
Page 128: Figure B-3 Auto Switching Menu, Cdm-570/570L
L o a d S w i t c h i n g Figure B-3 Auto Switching Menu, CDM-570/570L Remote Figure B-4 Remote Load Switching Page, SLM-5650A • Auto Switching – This is a Vipersat feature that is enabled in the CDM- 570/570L Features menu.
Page 129: Determination For Switching
L o a d S w i t c h in g • SCPC Step Down Threshold – Similar to the Step Up Threshold, except Step Down is used to trigger a switch to a lower data rate when the average traffic load falls below the set value.
Page 130: Load Switch Example
L o a d S w i t c h i n g Load Switch Example An automatic load switching example, illustrated in the schematic diagram in figure B-5, illustrates how a network can respond to changes in traffic volume or load conditions.
Page 131: Reduced Data Flow In Switched Mode (Scpc
L o a d S w i t c h in g 3. The STDMA Controller compares the Remote’s pre-selected buffer limits with its buffer status and, if the buffer status exceeds the preselected limits, the STDMA Controller increases the time-slot allocated to that channel. If this brings the buffer status within established limits, no further changes are made.
Page 132 L o a d S w i t c h i n g This entire process is automatic, following the policies established for the network. The network is dynamically modified, changing configuration to auto- matically respond to changes to the network’s load. The Home Threshold is the bit rate set to trigger a return to the home condition.
Page 133: Application Switching
A p p l i c a t i o n S w i t c h in g Application Switching Note: This Application Switching section refers to functionality of the CDM-570/ NOTE 570L modem/router. Application Switching is not available for SLM- 5650A modem/routers.
Page 134 A p p l i c a t i o n S w i t c h i n g Each application type will have been assigned a bandwidth allocation when the policy for the Remote is established. The voice application, for example, might have had the bandwidth set in the policy to handle three simultaneous voice connections.
Page 135: Tos Switching
T o S S w i t c h i n g ToS Switching ToS Background The Type of Service (ToS) byte is an 8-bit field contained within the IP header portion of an IPv4 packet. This field provides a means of marking packets for traffic identification and classification purposes.
Page 136: Detection Of Tos Stamped Packets
T o S S w i t c h i n g the clear and often provides the only mechanism for identifying and prioritize traffic within the network. The ToS switching feature in the SLM-5650A provides a reliable method for performing automatic dSCPC switching and is the preferred method for most encrypted environments that leave the IP header intact.
Page 137: Configuration
T o S S w i t c h i n g Configuration The ToS switching feature can be configured within the SLM-5650A modem using either the CLI or the Web user interface. For simplicity, the Web interface (figure B-8) will be presented in this example. Figure B-8 Remote ToS Switching menu The remote ToS switching is optioned by selecting 'Enable' or 'Disable'.
Page 138: Example Implementations
T o S S w i t c h i n g Example Implementations ToS Switching Per Device For applications that require an increase in SCPC bit rate for each application device, a separate ToS value must be assigned to each device individually. This provides granular switching for each device and also allows a mesh connection to be established for each device independently.
Page 139: Tos Remarking
T o S S w i t c h i n g Figure B-10 Per Type ToS Switching Example ToS Remarking For situations where the application device is not capable of stamping a packet with a ToS value, or where the application traffic is generated by a variety of different hosts and protocols, ToS remarking should be considered.
Page 140: Tos To Dscp Value Conversions
T o S S w i t c h i n g Figure B-11 ToS Remarking Application ToS to DSCP Value Conversions Application devices or remarking devices often have different ways of display- ing or configuring the ToS or DSCP values used to mark packets. Some devices require the user to input the ToS value while others require input of the DSCP value.
Page 141: Mesh Setup Based On Tos Detection
T o S S w i t c h i n g Mesh Setup Based on ToS Detection The detection of a ToS stamped packet by a remote modem can provide the means for setting up a Single Hop On Demand (SHOD) mesh connection from that remote to another remote within the network.
Page 142: Entry Channel Mode Switching
E n t r y C h a n n e l M od e S w i t c h i n g Entry Channel Mode Switching Entry Channel Mode (ECM) provides a method for Remotes requiring SCPC access channels to enter/re-enter the network, initially or after a power or other site outage.
Page 143: Fail-Safe Operation
E n t r y C h a n n e l M o d e S w i t c h in g their SCPC carrier inhibit flag set. The keep alive message is sent once every two seconds until re-entry is invoked. Fail-Safe Operation For Entry Channel Mode switching, it is useful to describe the fail-safe mecha- nism used for freeing pool bandwidth.
Page 144: Figure B-13 Ecm Switch Recovery: < 3 Minutes
E n t r y C h a n n e l M od e S w i t c h i n g ECM Switch Recovery < 3min. Burst Switched Remote Demod Demod State Unit Reboot Connected Satellite Delay 250 ms + 30ms E-E Home State - STDMA Wait for TX Grant...
Page 145: Using Stdma Ecm
E n t r y C h a n n e l M o d e S w i t c h in g ECM Switch Recovery > 3min. Burst Switched Remote Demod Demod State Unit Reboot Connected Satellite Delay 250 ms + 30ms E-E State Disconnected...
Page 146: Switching An Ecm Remote From Scpc To Stdma
E n t r y C h a n n e l M od e S w i t c h i n g Note: Refer to the Vipersat SLM-5650A modem manual for Entry Channel configuration setup. The text referenced within is similar between the NOTE CDM-570/L and the SLM-5650A;...
Page 147: Figure B-16 Ecm Remote List Page, Cdm-570
E n t r y C h a n n e l M o d e S w i t c h in g Figure B-16 ECM Remote List Page, CDM-570/570L 2. From the STDMA Remote List, select the Remote modem unit to be switched from running in SCPC to STDMA mode.
Page 148: Dynamic Entry Channel Mode
E n t r y C h a n n e l M od e S w i t c h i n g and not switch out to SCPC unless either an application switch occurs or a manual switch is invoked. 5.
Page 149: Hub Configuration
E n t r y C h a n n e l M o d e S w i t c h in g required acquisition time of the receiver and the amount of time allowed for M&C packet transactions. All Remotes will receive the TAP message from the Hub, but a Remote will only transmit back to the Hub if it is a member of the specified group.
Page 150: Remote Configuration
E n t r y C h a n n e l M od e S w i t c h i n g Figure B-19 Entry Channel Mode v2 Configuration, Hub Remote Configuration The demodulator (receive) configuration of each Remote in the group must be set appropriately in order to receive the TAP from the Hub.
Page 151: Ecm Processing
E n t r y C h a n n e l M o d e S w i t c h in g Figure B-20 Entry Channel Mode v2 Configuration, Remote ECM Processing A detailed representation of the sequence of steps that occur between the Hub units (the channel controller and a switched demodulator), the Remote unit, and the VMS during the ECM process is shown in figure B-21.
Page 152: Figure B-21 Ecmv2 Processing Diagram
E n t r y C h a n n e l M od e S w i t c h i n g Switched Remote Demod Sta te B oot D is con nec ted Satellite Delay Announcement RCV VMS Announcement &...
Page 153: Dynamic Power Control
P P E N D I X YNAMIC OWER ONTROL Introduction Dynamic Power Control (DPC) provides a mechanism whereby Vipersat satel- lite links have their transmit power levels adjusted in order to optimize the receive signal quality, as measured by the corresponding demodulator E This optimization process acts to either increase or decrease transmitted signal levels in order to: •...
Page 154 I n t r o d u c t i o n caused, for example, by the use of different antenna sizes in a mesh network, or by rain fade conditions. Receive signal quality and use of system resources is optimized, resulting in a reduction in power amplifier intermodulation as well as conservation of satellite transmit power.
Page 155: Description
Description Description The behavior of the Dynamic Power Control feature is designed to regulate power by utilizing the uplink margin to limit the maximum effective transmitted power (EIRP ) of the terminal. The DPC function in the IP-enabled Vipersat- optioned modems provides controls allowing an operator to input site budget numbers that compensate and limit modulator output power.
Page 156: Theory Of Operation
D e s c r i p ti o n Offset adjustments to the modulator transmit power during rain fade conditions are applied to incoming switch commands from the VMS. This prevents possi- ble link failures due to power value changes associated with changes in band- width, modulation, etc.
Page 157: Figure C-1 Data Rate To Power Relationship, Dpc
Description Mbps. With a set margin of 5 dB, the additive power is never greater than the set level at any rate, but still provides a full range of power, up to the site maxi- mum. Figure C-1 Data Rate to Power Relationship, DPC Note that only base rates are used in this example, with no alternative modula- tion or code rates.
Page 158: Figure C-2 Excessive Max Power Example
D e s c r i p ti o n The Max Power calculator takes into consideration all the above variables and compares them to the modem BER waterfall curves to determine if the modula- tor range is sufficient to achieve the budgetary information. If the calculator returns an error [INVALID], the base level is either too high or the set parame- ters have exceeded the capacity of the equipment.
Page 159: Configuration
Configuration point of the HPA. See “Signal Power Level Considerations” on page C-15 for more information. Configuration The DPC menus (CLI, Parameter Editor, WSI) provide configuration and cali- bration control to set up the site maximum power level. Note, however, that the Parameter Editor and the WSI only support a subset of what is available in the Command Line Interface (CLI).
Page 160 C o nf i g ur a t i o n Table C-1 DPC Parameters, Main Menu Parameter Menu Default Description SOTM Offset Main; Display Satcom-On-The-Move hunt power adjustment Modulator Only when operating in STDMA mode. When enabled, this offset value is applied to the BaseLine Power when switching into SCPC mode.
Page 161: Main Dpc Menu
Configuration Table C-2 DPC Parameters, Calculate Max Power Menu Parameter Menu Default Description Calculate Max Calculate Calculate After entering all maximum budgetary settings, Power Max Power; Command this menu command will generate the Max Modulator Power value for the modulator. Max Power Calculate Display...
Page 162: Enable Dpc
C o nf i g ur a t i o n changed from the CLI Calculate Max Power menu (figure C-5). The calculator function is not available from the Parameter Editor because it does not contain the information for the modem BER waterfall curves, which is vital to calculate maximum power.
Page 163: Speed Up Eb/No Range
Configuration carrier value. When this value is received by the transmitting modulator, it is compared to the set value; if they are different, the modulator servos its output power level to achieve the targeted E level. The modulator DPC function can support multiple demodulators as assigned by the system.
Page 164: Figure C-5 Dpc Calculate Max Power Screen, Cli
C o nf i g ur a t i o n This calculator uses the site budgetary numbers to determine the maximum power value when operating at peak transmission settings. After the operator enters all parameters and selects the Calculate Max Power command, the calcu- lator compares the values to base numbers and selected BER tables to determine the power budget based on the total margin.
Page 165: Calibrated Data Rate
Configuration Calibrated Data Rate This is the Baseline Home State Data Rate and is used as the base reference value to calculate the maximum DPC Margin. DPC Margin The Margin setting governs the upper power limit for all combinations of wave- forms given.
Page 166: Max Power
C o nf i g ur a t i o n Max Power After entering all site budgetary numbers and selecting the Calculate Max Power command, the system processes the max settings against the BER tables to determine and display the site maximum power limit. This maximum power value is achieved only when all parameters are dynamically set to maximum and the environmental conditions are at diminished capacities.
Page 167: Signal Power Level Considerations
S i g n a l P o w e r L e v e l C o n s i d e r a t i o n s Signal Power Level Considerations There are many parameters to consider when planning and commissioning a site for satellite transmission.
Page 168: Power Considerations
S i g n a l P o w e r L e v e l C o n s i d e r a t i on s level is then calculated based on the BUC’s P max minus the transmit cable loss.
Page 169 S i g n a l P o w e r L e v e l C o n s i d e r a t i o n s A good note here is that, with the typical LO frequencies as shown in the exam- ple above, transmit and receive L-band frequencies are widely separated.
Page 170 S i g n a l P o w e r L e v e l C o n s i d e r a t i on s Table C-3 Typical Coaxial Cable Characteristics Cable Type Max. Freq. O.D. Loss/100 Shielding Estimated...
Page 171: Ecm Migration
P P E N D I X ECM M IGRATION Migrating from STDMA/ECMv1 to Aloha/ECMv2 General The material in this appendix is offered to provide a step-by-step procedure for network operators to migrate an STDMA/ECMv1 control channel to the latest version of Aloha/ECMv2.
Page 172 G e n e r a l All other standard controls for access into dSCPC are maintained, but because of a new fixed entry switch type, VMS version 3.9.2 or greater is required. Because most networks are likely to have Remote sites off-the-air for various reasons, the task of upgrading all locations during a planned maintenance period introduces complexity, particularly where the upgrade breaks current protocol.
Page 173: Migration Procedure
M i g r a t i on P r oc e d u r e Migration Procedure This procedure is intended for Remote sites that are online or offline with Hub communications. The following steps are accomplished remotely through communication links from Hub to Remote site.
Page 174: Figure D-1 Stdma Configuration Page, Remote
M i gr a t i o n P r o c e d u r e Figure D-1 STDMA Configuration Page, Remote CDM-570/L 3. Click on the OK button to implement the change, and Save to Flash when prompted to ensure that this new configuration is preserved during Hub con- figuration.
Page 175: Configure Hub Unit
M i g r a t i on P r oc e d u r e Configure Hub Unit Once all active Remotes have been configured to ECMv2/Online state, the next step is to configure the ECM Hub Channel Controller, which can be the demod- ulator on either a CDM-570 or a CDD-56X.
Page 176: Figure D-3 Stdma Menu, Ecmv2 Hub Type
M i gr a t i o n P r o c e d u r e After the Hub Type is changed to ECMv2, the controller will start sending TAP multicast messages using the burst map multicast address 239.1.2.3, and broad- casting to the group the frequency, data rate, and timing as well as where and when the Remotes can transmit.
Page 177: Figure D-4 Switch Rate Limits, Inband Return Path
M i g r a t i on P r oc e d u r e Example: The recommended settings for 64 kbps, QPSK, 3/4 • Guardband—60 msec • Preamble Length—300 msec • Total Slot Count—10 Tip: A Vipersat calculator is available to optimize these settings. Contact a Comtech Vipersat Networks representative for a copy of the latest Vipersat ECM Calculator.
Page 178 M i gr a t i o n P r o c e d u r e 5. Save the configuration to Flash on the ECM Hub Controller. This concludes the ECM migration procedure. V i p e r s a t C D M - 5 7 0 / 5 7 0 L U s e r G u i d e...
Page 179: Glossary
P P E N D I X LOSSARY A signal used in computing and other fields to indicate acknowledgement, such as a packet message used in TCP to acknowledge the receipt of a packet. Adaptive Coding and Modulation – A technique that optimizes throughput in a wireless data link by adapting the forward error correction code rate and the modulation order according to the noise conditions (or other impairments) on the link.
Page 180 Comtech Data Demodulator (CEFD model designator; e.g., CDD-564) Comtech Data Modem (CEFD model designator; e.g., CDM-570) CEFD Comtech EF Data – Global leader in satellite bandwidth efficiency and link optimization, and supplier of advanced communication solutions. A subsidiary of Comtech Telecommunications Corporation.
Page 181 Cyclic Redundancy Check – A method of applying a checksum to a block of data to determine if any errors occurred during transmission over communica- tions links. Carrier – A radio frequency transmission linking points and over which infor- mation may be carried. DAMA Demand Assigned Multiple Access –...
Page 182 FAST Code Fully Accessible System Topology Code – Designation for feature code used by Comtech EF Data for their satellite modems. The FAST method makes it easy to quickly upgrade the feature options of a modem while it is running live in the network, either on site or remotely.
Page 183 Guaranteed Information Rate Group ID A number assigned to equipment which defines it as a member of a group when addressed by the VMS Hub Controller. Graphical User Interface – A form of graphical shell or user interface to a computer operating system or software application.
Page 184 IGMP Internet Group Management Protocol – An IP communications protocol used by network hosts and adjacent routers to establish multicast group member- ships. Image A binary firmware file that provides the operational code for the processor(s) in a network unit. Internet Protocol –...
Page 185 Local Oscillator – A component used in upconverters, downconverters, and transponders for frequency translation (heterodyne) of the carrier signal. M&C Monitor & Control Media Access Control – A protocol controlling access to the physical layer of an Ethernet network. Mbps Mega bits per second –...
Page 186 Remote node. Network Processor – Also referred to as the IP Module. An optional assembly for Comtech EF Data modems that provides the 10/100 BaseT Ethernet inter- face that is required when used in Vipersat networks.
Page 187 PSTN Public Switched Telephone Network – The world’s public circuit-switched telephone network, digital and analog, and includes mobile as well as land-line voice and data communications. Periodic Update Message – A packet message that is sent by newer Vipersat modems (e.g., CDM-840) to the VMS every sixty seconds, providing either registration request or status update and operating parameter information (SUM).
Page 188 RS-232 A common electrical/physical standard issued by the IEEE used for point to point serial communications up to approximately 115 kb/s. Real-time Transport Protocol – A standardized packet format for delivering real-time applications such as audio and video over the Internet. Frequently used in streaming media systems, videoconferencing, and VoIP.
Page 189 Transmission Announcement Protocol – A proprietary multicast message sent out by the HCC to all associated Remotes in the group, specifying the relative start time and duration for each terminal to transmit while in Entry Channel mode (ECMv2). TCP/IP Transmission Control Protocol / Internet Protocol – A standard for networking over unreliable transmission paths.
Page 190 Vipersat Circuit Scheduler – The ArrangeLink VCS is a proprietary satellite communication scheduling system used to schedule Vipersat network resources in support of a variety of high-priority applications such as video conferencing and scheduled broadcasting. VersaFEC Advanced forward error correction technology from CEFD that provides maxi- mum coding gain with lowest possible latency to support latency-sensitive data applications, such as voice, video, and cellular backhaul.
Page 191 WRED Weighted Random Early Detection – A queue management algorithm with congestion avoidance capabilities and packet classification (QoS) providing prioritization. A p p e n d i x E - G l o s s a r y E-13...
Page 192 { This Page is Intentionally Blank } E-14 V i p e r s a t C D M - 5 7 0 / 5 7 0 L U s e r G u id e...

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Vipersat cdm-570l

Comtech EF Data Vipersat CDM-570 User Manual

Appendix A - Network Addressing

Appendix B - Automatic Switching

Appendix C - Dynamic Power Control1-2

Appendix D - ECM Migration

Appendix E - Glossary

Quick Start Configuration

Using the Command Line Interface

(Cli)

Network Addressing

Appendix A Figures

Quick Links

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Summary of Contents for Comtech EF Data Vipersat CDM-570