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- Page 1 Instruction Manual MD 2000 MD 2000 mDSL MODEM Installation & Operation Manual P/N: 8000 601 620 Revision: 0B CXR Telcom Corporation 894 Faulstich Court San Jose, CA 95112 Tel: 408.573.2700 Fax: 408.573.2708 Email: ajmarketing@cxr.com www.cxr.com MD 2000 - Page 1...
- Page 2 Instruction Manual MD 2000 Warning This publication contains information that is the property of CXR Anderson Jacobson. No part of this publication may be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine readable form without prior written consent of CXR Anderson Jacobson.
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Page 3: Table Of Contents
Instruction Manual MD 2000 Table of Contents INTRODUCTION ................................... 8 DTE I ..................................9 NTERFACES ..................................9 ONDITIONING ............................10 NSTALLATION AND INITIAL SET ..................................10 ONFIGURATION ..............................10 ACTORY ONFIGURATIONS ..................................11 LARM RELAYS G.703/G.704 I ............................... 11 NTERFACE ................................. - Page 4 Instruction Manual MD 2000 ....................................40 ENERAL T1 I .............................. 42 NTERFACE ONFIGURATION RJ-45 C ..............................43 ONNECTOR IRING 64 KBPS G.703 / J64 INTERFACE CONFIGURATION......................44 10.1 ....................................44 ENERAL 10.2 J64 I ............................44 NTERFACE ONFIGURATION 10.3 RJ-45 C ..............................
- Page 5 Instruction Manual MD 2000 Convention, product range and options The CXR-AJ mDSL modems consist of a series of configurations or the MD 2000. Although they are very similar they differ in the following characteristics: Characteristics MD 2000 Maximal rate 4.64 Mbps Automatic mode The equipment is supplied under different versions according to: •...
- Page 6 Instruction Manual MD 2000 Safety Instructions This equipment meets the safety requirements of the UL 1950 standard. The following accesses are referenced as safety low voltages: • 5 VDC Input of the MD2000 / xV desktop unit • 48 VDC Input of the MD2000 / xC desktop unit •...
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Page 7: Introduction
Instruction Manual MD 2000 receiver sensitivity : -40 dB • T1 interface : rate : 1.544 Mbps coding : B8ZS or AMI framing : 24 time slots with F bit – G.704 compatible line build outs : DSX-1 and CSU receiver sensitivity : -36 dB Introduction The MD 2000 is an mDSL modem (Multi-Rate Digital Subscriber Line) which provides multi rate symmetrical data transmission over a 2... -
Page 8: Installation And Initial Set-Up
Instruction Manual MD 2000 Installation and initial set-up The MD 2000 is easy to install. One modem must be configured as NTU (Network Termination Unit) at one end of the line, and the other end as LTU (Line Termination Unit). The clock signals can be independently configured. The MD 2000 offers an automatic connection mode, which probes the line to connect at the best possible rate. -
Page 9: Installation
Instruction Manual MD 2000 Installation Desktop Modem 2.1.1 Accessories • One RJ-45-RJ 45 cable and one RJ-45-DB9 converter for the control port • One RJ11cable for line connection • External power supply module when applicable (MD2000 XVF version) • One DB25-DB15 cable if modem is equipped with an X.21-V.11 interface (MD2011 version). This cable is optional and should be ordered separately (P/N: CA 601 461) •... -
Page 10: Installation
Instruction Manual MD 2000 2.2.2 Installation • Please also refer to the chassis user manual for the modem installation. • Locate an open slot in the chassis and insert the MD 2000 card. 2.2.3 Connections • Connect the modem at the rear of the chassis as per the following drawing: •... -
Page 11: Display And Switches
Instruction Manual MD 2000 Display and Switches Front Panel This chapter describes the operation of the 6 LED indicators and 1 push button. 3.1.1 LED Display Six LED indicators and one pushbutton are installed on the front panel of the Desktop modem. The LEDs display an indication on the status of the modem and provide fault indications during auto test DTR-INTF CD DATA... -
Page 12: Typical Applications
Instruction Manual MD 2000 Typical applications This chapter describes the basic configuration of the MD 2000 in some typical applications. Refer to the following chapters for more specific settings. Initialization These examples describe the AT commands sent to the modem from a factory configuration. Use the following commands to restore the factory configuration : AT&W255 T1 / E1 G.704 link... -
Page 13: Terminal Connection
Instruction Manual MD 2000 The following parameters may fix troubles if LAN frames are not IEEE 802.3 compliant: *F0 : disables MAC address filtering *P0 : disables Ethernet Padding bit suppression V.35-X.21 terminal connection These interfaces connect terminals, server, routers through their V.35 or X.21 interface. V35 or X.21 terminal V.35 or X.21 terminal AT commands to modem... -
Page 14: Operation And Configuration
Instruction Manual MD 2000 Operation and Configuration This chapter describes the modem operation through its Control port. All parameters are also accessible via the front panel display and the associated keys. The modem must be connected to a VT100 compatible terminal or to a PC running a VT100 terminal emulation software that should be configured as follows: Speed: 19200 bps Data format: 8 bits... - Page 15 Instruction Manual MD 2000 First menu: The first menu provides access to the configuration parameters, internal memory management, loop test, status and statistics displays sub-menus. Press 'Q' or 'Esc' to exit the VT100 menus. CXR - MD 2000 : Management Menu MD 2HUB REV 1.02 1 - EDIT MODEM CONFIGURATION...
- Page 16 Instruction Manual MD 2000 Menu 2: Save and Restore Configuration from Memory CXR - MD 2000 : MEMORY MANAGEMENT 1 - SAVE CONFIGURATION IN USER MEMORY 0 2 - SAVE CONFIGURATION IN USER MEMORY 1 3 - RESTORE USER CONFIGURATION 0 4 - RESTORE USER CONFIGURATION 1...
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Page 17: At Command Mode
Instruction Manual MD 2000 Menu 4: Connection Status CXR - MD 2000 : CONNECTION STATUS MODEM VERSION : MD 2000 360/361 REV 1.02 DTE INTERFACE : G.703 - G.704 MODEM SPEED : 2064 K DTE SPEED : 2048 K XMIT LEVEL 0 dBm RECV GAIN 31 dB... -
Page 18: General Parameters And Commands
Instruction Manual MD 2000 General Parameters and Commands The following tables describe the MD2000 general commands and parameters. The commands, which are related to a specific DTE interface, are described in the following chapters. 5.4.1 Connection Configuration These commands define the parameters for the connection with the remote modem. % O C o m m a n d "... -
Page 19: Configuration And Control
Instruction Manual MD 2000 % X L C o m m a n d " T r a n s m i t L e ve l " This parameter defines the carrier transmit level in dBm. The higher level will be used in most cases. In sensitive cases the level will be attenuated to minimize noise and cross talk in multi-pair cables. -
Page 20: Security
Instruction Manual MD 2000 * R S C o m m a n d " R e s e t S t a t i s t i c s " This command resets all the connection statistics and counters (connection time, bit error rate) Format: AT*RS + R C o m m a n d "... -
Page 21: Tests
Instruction Manual MD 2000 % S L C o m m a n d " L o w e r / U p p e r C a s e C o n t r o l " This command sets the lower case/capital letters recognition for the passwords registering and controls. Format: AT%SLn %SL0 Case sensitivity disabled (default) %SL1 Lower case/capital letter differentiation enabled... -
Page 22: 21 - V.11 And V.35 Interfaces
Instruction Manual MD 2000 V.35 and X.21 - V.11 Interfaces This chapter describes the operation of MD2011 and MD 1011 with X.21-V.11 interface and MD2035 and MD 1035 with V.35 interface. General The V.11 and V.35 interfaces provide interconnection of synchronous data transmission equipment at speed from 64Kbps up to 4,640Kbps. - Page 23 Instruction Manual MD 2000 Format: AT*Dn CD always active CD active when the modem is connected (default value) * T C o m m a n d " V . 3 5 - C T S / I T U - T 1 0 6 c i r c u i t " This parameter controls the activation of the CTS - 106 signal of the V.35 interface.
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Page 24: Wiring
Instruction Manual MD 2000 Wiring A DB25 female connector is used to connect the terminal equipment to the modem via an adaptation cable. The connector is wired as per the following table: DB25 Pin X.21-V.11 Signal DB15 Pin V.35 Signal V.35 Pin 101 –... -
Page 25: 10Bt And 8 Port Hub Bridge Interface
Instruction Manual MD 2000 10BT and 8 port HUB Bridge Interface This chapter describes the operation of the Ethernet 10BT and 8 port Hub interfaces of the MD 2000 version. General The Ethernet 10baseT and 8 port Hub interfaces provide LAN-to-LAN connection via a high-speed link up to 4.640 Mbps. In a typical application, the 10 BaseT single port will be used at the central site to connect to the LAN and the 8 port HUB will be used at the remote location to connect several workstations without the need for any additional equipment. -
Page 26: On The Hub 8 Port Bridge
Instruction Manual MD 2000 Receive + + Receive Not connected Not connected Receive - - Receive Not connected Not connected CAUTION: The bridge is polarity sensitive and the received pair must be wired with special care. 7.3.2 RJ-45 on the HUB 8 port Bridge The RJ-45 sockets of the 8 port HUB are wired as per the following drawing: Signal Description... -
Page 27: E1 G.703-G.704 Interface Configuration
Instruction Manual MD 2000 E1 G.703-G.704 Interface Configuration This chapter describes the operation of the MD2703 E1 G.703-G.704 interface. General MD2703 modems, equipped with G.703-G.704 interfaces, provide a transmission path for PCM, E1 or PRI links over 2 wire metallic lines. -
Page 28: E1 Interface Configuration
Instruction Manual MD 2000 (Network) Slave clock External Equipment supplies (&X2) clock slaved to the the clock signal (&X1) received clock The clocks will be configured as one of the following combinations: MD 2000 LTU network MD 2000 NTU subscriber Typical Case External &X1 External &X1... -
Page 29: Connector Wiring
Instruction Manual MD 2000 RJ-45 Connector Wiring An RJ-45 female connector provides the connection to the terminal equipment. The connector is shown on the following drawing. 1….….8 Signal Description RECV TIP Received signal RECV RING Received signal XMIT TIP Transmit signal XMIT RING Transmit signal G.703 cables are available on demand as an option to the MD2703 modem:... -
Page 30: T1 G.703-G.704 Interface Configuration
Instruction Manual MD 2000 T1 G.703-G.704 Interface Configuration This chapter describes the operation of the MD20T1 T1 G.703-G.704 interface. General MD20T1 modems equipped with T1 G.703-G.704 interfaces provide a transmission path for T1 links over 2 wire metallic lines. The MD2000 could be configured to transmit and receive all or part of the 24 time slots of a T1 link in order to match the maximum rate permissible on a line or to accommodate longer lines. -
Page 31: T1 Interface Configuration
Instruction Manual MD 2000 clock signal clock Slave clock mode The MD2000 uses the G.703 received clock signal as the G.703 transmit clock signal. Example: MD 2000 MD 2000 mDSL Local Remote Link Terminal Terminal Equipment Equipment (Network) Slave clock External Equipment supplies... -
Page 32: Connector Wiring
Instruction Manual MD 2000 -7.5 dB CSU -15 dB CSU -22.5 dB CSU @ F C o m m a n d " D 4 / E S F F r a m e " This parameter defines the T1 frame mode. Format: AT@Fn D4 Super Frame mode (default) Extended Super Frame ESF mode... -
Page 33: 64 Kbps G.703 / J64 Interface Configuration
Instruction Manual MD 2000 10 64 Kbps G.703 / J64 Interface Configuration This chapter describes the operation of the MD2064 and MD 1064 G.703 - 64 Kbps bi-directional J64 interface. 10.1 General The J64 interface of the MD2064 carries one 64 Kbps channel. The remote modem may be either the same J64 model or an E1 - G.703/G.704 interface extracting the first data timeslot of the G.704 frame, or even a X.21-V.11 interface at a rate of 64 Kbps. -
Page 34: Asynchronous Mode
Instruction Manual MD 2000 The external clock is used on the transmit data path. Received data should be synchronized on the received clock issued by the modem. The DSR, CD and CTS signals provided by the interface are configurable. The DTR-INTF LED is on if the 108-DTR signal is active on the RS232 interface. It is off otherwise. 11.2 Asynchronous mode Asynchronous data are sampled on the interface by a synchronous clock of a rate at least 8 times higher than the asynchronous rate. -
Page 35: Wiring
Instruction Manual MD 2000 11.4 Wiring A DB25 female connector is used to connect the terminal equipment to the modem. The connector is wired per the following table: DB25 Pin V24 - RS232 Signal 101 – C. GND 103 – TXD 104 –... -
Page 36: Diagnostics And Tests
Instruction Manual MD 2000 12 Diagnostics and Tests 12.1 Diagnostics The modem displays its operating parameters and connection statistics for evaluation of the transmission quality and performance. This information is given on status pages 5 and 6 or on menu 4 in VT100 mode as shown in the following example: CXR - MD 2000 : CONNECTION STATUS MODEM VERSION : MD 2000... -
Page 37: Test
Instruction Manual MD 2000 12.2 Test 12.2.1 Local Analog Loop The modem synchronizes to the carrier that it transmits on its line interface. This configuration provides a test of all the internal parts in the modem. This loop corresponds to an ITU-T V54 B3 loop. DTE A MODEM A Procedure:... -
Page 38: Memories
Instruction Manual MD 2000 System Memory The modem includes three different system memories: • The Flash EPROM , which permanently stores the factory configuration and the modem firmware. • The RAM, where the active configuration reside. • The NVRAM (non-volatile memory) where the user configurations are saved. The content of this memory is protected even when the modem is switched off. -
Page 39: Transmission Modes
Instruction Manual MD 2000 Technical Specifications 14.1 Transmission Modes • Modulation: CAP - Carrier less Amplitude and Phase modulation • Transmission compliant with ITU-T G.991-1, ANSI TR-28, ETS 101.135 • Line rates: 144 Kbps, 272 Kbps, 400 Kbps, 528 Kbps, 784 Kbps, 1.04 Mbps, 1.552Mbps, 2.064Mbps, 2.320Mbp, 4.64Mbps •... -
Page 40: Troubleshooting
Instruction Manual MD 2000 15 Troubleshooting This chapter describes the modem operation phases and provides diagnostics for most of the problems encountered during installation and operation of the MD2000. 15.1 Power-up Phase The following phases can be observed during the modem power-up: Phase Description Memory Test... -
Page 41: Line Evaluation
Instruction Manual MD 2000 Phase Description inoperative without the re-initialization. Training The modem tries to synchronize with the carrier from the remote modem. This is displayed as follows: Negotiation Fast flashing on the CD and CTS LED display Fast flashing on the CD LED display and the second line on the LCD display reads: TRAINING In this state the modem has detected the transmit signal from the remote modem, it tries to connect at its configura If the line cannot meet this rate, the negotiation is unsuccessful. -
Page 42: Appendix
Instruction Manual MD 2000 Appendix 16.1 Appendix A – Wiring 16.1.1 Serial Control Port - RJ-45 1….….8 Pin # Signal Description 107 - DSR Modem ready - permanent 109 - CD Modem connected - permanent 108 - DTR Data terminal ready 102 - GND Ground 104 - RXD... -
Page 43: Appendixb : Product Line Warranty
16.2 Appendix B : Product Line Warranty Products manufactured by CXR Telcom Corporation are guaranteed to be free of defects in materials and workmanship for a period of one year from the date of shipment. CXR Telcom will accept returned items, transportation prepaid to the service center, for repair during the warranty period at no cost to the customer, provided that the products have not been subjected to improper installation, accident, misuse, neglect, or unauthorized alterations.
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