Paradyne 7974 User Manual
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Paradyne 7974 User Manual

Tdm sdsl standalone termination units
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Hotwire
TDM SDSL
Standalone Termination Units
Models 7974-A2, 7975-A2,
and 7976-A2
User's Guide
Document No. 7900-A2-GB21-20
December 2001

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  • Page 1 ® Hotwire TDM SDSL Standalone Termination Units Models 7974-A2, 7975-A2, and 7976-A2 User’s Guide Document No. 7900-A2-GB21-20 December 2001...
  • Page 2 Copyright © 2001 Paradyne Corporation. All rights reserved. Printed in U.S.A. Notice This publication is protected by federal copyright law. No part of this publication may be copied or distributed, transmitted, transcribed, stored in a retrieval system, or translated into any human or computer language in any form or by any means, electronic, mechanical, magnetic, manual or otherwise, or disclosed to third parties without the express written permission of Paradyne Corporation, 8545 126th Ave.

  • Page 3: Table Of Contents

    Contents About This Guide Document Purpose and Intended Audience ....New Features for this Release ....... Document Summary .
  • Page 4 Switchpack Locations ........Model 7974 Switchpack Definitions ......
  • Page 5 Remote Network Send Line Loopback ..... DSX-1 Tests (Model 7974)........
  • Page 6 Network Interface Options Menu ......DSX-1 Interface Options for Model 7974 ..... . .

  • Page 7: About This Guide

    Standalone Termination Units, Models 7974-A2, 7975-A2 and 7976-A2, and is intended for installers and operators. New Features for this Release This version of the Hotwire TDM SDSL Standalone Termination Units, Models 7974-A2, 7975-A2, and 7976-A2, User’s Guide adds new payload rates for the Model 7976-A2. Document Summary Section...

  • Page 8: Product-Related Documents

    Lists key terms, acronyms, concepts, and sections in alphabetical order. Technical Glossary. Document Title Hotwire TDM SDSL Standalone Termination Units, Models 7974-A2, 7975-A2, and 7976-A2, Installation Instructions Hotwire TDM SDSL Termination Units, Models 8777 and 8779, User's Guide Hotwire TDM SDSL Termination Units, Models 8775 and 8785, User's Guide Technical Manuals.

  • Page 9: About Standalone Tdm Sdsl Termination Units

    About Standalone TDM SDSL Termination Units TDM SDSL Overview ® Hotwire Time Division Multiplexer Symmetric Digital Subscriber Line (TDM SDSL) products maximize customer service areas by varying the DSL line rate. This ensures symmetric DSL connectivity over a wide range of telephone line distances and transmission line qualities.

  • Page 10: Standalone Tdm Sdsl Features

    1. About Standalone TDM SDSL Termination Units Standalone TDM SDSL Features Hotwire 797x Standalone Termination Units are endpoints for the chassis-mounted Hotwire 877x Termination Unit that is housed in the Hotwire 8600 or 8800 Series Digital Subscriber Line Access Multiplexer (DSLAM). Two Hotwire Standalone Termination Units can also be configured to operate in a central office Line Termination Unit (LTU)-to-customer premises Network Termination Unit (NTU) environment.

  • Page 11: Network Configuration

    Network Configuration Figure 1-1, Sample termination unit in a central office (CO). In this configuration, a frame relay switch and router are connected through the termination unit to partner units supporting a host or router and frame relay encapsulated or unframed data. The figure also shows a standalone-to-standalone configuration.

  • Page 12: Front Panel Led Status Indicators

    Termination Units. For more information about the front panel LEDs, refer Front Panel LEDs Figure 1-2. Figure 1-3. Figure 1-4. in Chapter 7, Monitoring and Troubleshooting . 7974 TDM SDSL ® Hotwire Standalone Termination Unit with DSX-1 Interface Front Panel 7975 TDM SDSL ®...

  • Page 13: Rear Panel Interfaces

    Rear Panel Interfaces Figures 1-5 through 1-7 show the physical interfaces of the termination units. For more information about the rear panel interfaces, refer to Connectors, Cables, and Pin Assignments POWER Figure 1-5. POWER Figure 1-6. POWER Figure 1-7. 7900-A2-GB21-20 1.

  • Page 14: Snmp Management Capabilities

    TCP/IP internets and provides general information about the unit. MIB II is backward-compatible with MIB I. DS1/E1 MIB (RFC 1406) – Models 7974 and 7976. Reports the performance status of the DSX-1 or G.703 interface and supports the features found on the DSX-1 or G.703 Performance Statistics screen.

  • Page 15: Snmp Trap Support

    SNMP Trap Support Hotwire 797x Standalone Termination Units support traps as defined in RFC 1215. Figure 1-8, DSL SNMP configuration. configuration where the NMS is connected directly to the termination unit’s Communications Port. Router Figure 1-8. Router Figure 1-9. For additional information, refer to Standards Compliance for SNMP Traps 7900-A2-GB21-20 1.
  • Page 16 1. About Standalone TDM SDSL Termination Units December 2001 7900-A2-GB21-20...

  • Page 17: Using The Asynchronous Terminal Interface

    Using the Asynchronous Terminal Interface User Interface Access You can communicate with the Hotwire Standalone Termination Unit with an asynchronous terminal interface (ATI) using one of the following methods: Direct connection through the COM port of the standalone unit or through the serial port of the DSLAM management card.

  • Page 18: Initiating An Ati Session

    2. Using the Asynchronous Terminal Interface Initiating an ATI Session The Main Menu screen is displayed unless a login ID and password is required or the ATI is already in use. If the ATI is already in use, you will see: A connection refused or connection failed message (if you are using a Telnet session), or The IP address of the other user (if you are using the Management Serial...
  • Page 19 After you enter a valid login ID and password, the Main Menu appears. If you enter an invalid login ID and password after three attempts, the Telnet session closes or the terminal connection returns to an idle state. Refer to main Screen Area...

  • Page 20: Menu Hierarchy

    7975: (Not Applicable) Statistics 7976: G.703 Statistics Network Performance Statistics 7974: (Not Applicable) 7975: Sync Data Port Tests 7976: (Not Applicable) 7974: Network and DSX-1 Tests 7975: Network Tests 7976: Network and G.703 Tests Network Main Test Configuration Display Identity...

  • Page 21: Screen Work Areas

    Screen Work Areas There are two user work areas: Screen area – This is the area above the dotted line that provides the menu path, menus, and input fields. The menu path appears as the first line on the screen. In this manual, the menu path is presented as a menu selection sequence: Main Menu Function key and message area –...

  • Page 22: Navigating The Screens

    2. Using the Asynchronous Terminal Interface Navigating the Screens You can navigate the screens by: Using keyboard keys Using function keys Switching between the two screen work areas Keyboard Keys Use the following keyboard keys to navigate within the screen. Press .

  • Page 23: Function Keys

    Procedure To make a menu or field selection: 1. Press the Tab key or the right arrow key to position the cursor on a menu or field selection. Each selection is highlighted as you press the key to move the cursor from position to position.

  • Page 24: Switching Between Screen Work Areas

    2. Using the Asynchronous Terminal Interface Switching Between Screen Work Areas Select Ctrl-a to switch between the two screen work areas to perform all screen functions. Procedure To access the screen function area below the dotted line: 1. Press Ctrl-a to switch from the screen area to the function key and message area below the dotted line.

  • Page 25: Initial Startup And Configuration

    Initial Startup and Configuration Overview This chapter provides instructions on how to access and configure your Hotwire TDM SDSL Standalone Termination Unit for the first time, displaying configuration options, disabling or resetting the AutoRate feature, and downloading firmware. These procedures include: Connecting Power Connecting to the Network Connecting to a DTE...

  • Page 26: Connecting Power

    3. Initial Startup and Configuration Connecting Power If your package includes a power pack: Plug the power pack into an AC outlet having a nominal voltage rating between 100 – 240 VAC. Connect the output cable of the power pack to the connector marked POWER on the rear panel. If your package includes a direct-connection DC power cable: Connect the unit to an external +24 or –...

  • Page 27: Connecting To The Network

    Do not use a flat VF network cable as this may severely degrade the performance of the unit. Only use a Cat 5 twisted-pair network cable. Connecting to a DTE The DTE interface varies from model to model. Model 7974 7975 7976 Appendix C, Connectors, Cables, and Pin Assignments 7900-A2-GB21-20 DTE Connection The DSX-1 interface is an RJ48C, 8-position, unkeyed modular connector.

  • Page 28: Connecting To A System Terminal

    3. Initial Startup and Configuration Connecting to a System Terminal An optional system maintenance terminal may be attached to the standalone termination unit through the modular jack on the rear panel. The terminal allows you to view the status of the unit and change configuration options. It must be a VT100-compatible terminal or a PC running terminal emulation software.

  • Page 29: Entering Identity Information

    Entering Identity Information After accessing the unit for the first time, use the Change Identity screen to determine SNMP administrative system information that will be displayed on the Identity screen of the Status branch. To access the Identity screen, follow this menu selection sequence: Main Menu main/control/change_identity...

  • Page 30: Choosing A Configuration Method

    3. Initial Startup and Configuration Procedure To change Identity information: 1. Position the cursor in the System Name field. Enter a name unique in your network to identify the SNMP managed node (or unit). 2. Position the cursor in the System Location field. Enter the physical location of the unit.

  • Page 31: Configuring The Unit Using Configuration Menus

    Configuring the Unit Using Configuration Menus Configuration option settings determine how the standalone TDM SDSL termination unit operates. Use the Configuration menus to select, display, or change configuration option settings. NOTE: The Hotwire 797x TDM SDSL Standalone Termination Unit is preconfigured as an NTU.

  • Page 32: Configuration Loader

    3. Initial Startup and Configuration Accessing and Displaying Configuration Options To display configuration options, you must first load a configuration into the edit area. To load a configuration option set into the configuration edit area, follow this menu selection sequence: Main Menu main/configuration --------------------------------------------------------------------------------...

  • Page 33: Current And Default Factory Configurations

    Current and Default Factory Configurations The Configuration Edit/Display screen appears when the current or default configuration is loaded. To access the Configuration Edit/Display screen, follow this menu selection sequence: Main Menu – or – Main Menu main/config/edit -------------------------------------------------------------------------------- Ctrl-a to access these functions, ESC for previous menu Save In the menu selection sequences contained in this manual, Current Configuration is assumed and shown.
  • Page 34 Communication 3-10 , for a list and explanation of the To Access the . . . Network Interface Options (Table A-1) DSX-1 Interface Options for Model 7974 (Table A-5) Synchronous Data Port Options for Model 7975 (Table A-6) G.703 Interface Options for Model 7976...

  • Page 35: Configuration Loader

    Configuration Loader The Configuration Loader screen allows you to upload configurations to and download configurations from a TFTP server. To access the Configuration Loader screen, follow this menu selection sequence: Main Menu main/configuration/config_loader Configuration File Name: TFTP Server IP Address: TFTP Transfer Direction: ------------------------------------------------------------------------------- Ctrl-a to access these functions, ESC for previous menu...
  • Page 36 3. Initial Startup and Configuration 2. Position the cursor in the TFTP Server IP Address field. Enter the TFTP server IP address. 3. Position the cursor in the Destination field. Use the spacebar to select a network destination for the TFTP server. Select DSL if the TFTP server destination is the DSL link or COM if the TFTP destination is the COM port.

  • Page 37: Saving Configuration Options

    Saving Configuration Options When changes are made to the configuration options through the Configuration Edit/Display branch, the changes must be saved to take effect. Use the Save key or Save Configuration screen. Procedure To save configuration options changes: 1. Press Ctrl-a to switch to the function key and message area. 2.

  • Page 38: Resetting The Device

    3. Initial Startup and Configuration Resetting the Device If the user interface is functional, you can perform a power-on reset of the unit from the Control menu. Procedure To reset the unit from the Control menu: 1. Follow this menu selection sequence: Main Menu 2.

  • Page 39: Disabling Autorate

    Disabling AutoRate The AutoRate function is controlled from the Network Interface Options screen and allows you to enable or disable the AutoRate feature. The AutoRate option is only available if the unit is configured as an LTU. To access the Network Interface screen, follow this menu selection sequence: Main Menu main/config/network Circuit Identifier:...

  • Page 40: Downloading Firmware

    3. Initial Startup and Configuration Downloading Firmware The Download Code screen allows you to download firmware from a TFTP server. To access the Download Code screen, follow this menu selection sequence: Main Menu main/control/download_code TFTP Server IP Address: Immediately Apply Download: ------------------------------------------------------------------------------- Ctrl-a to access these functions, ESC for previous menu Procedure...
  • Page 41 5. Position the cursor at the Start Transfer field. Use the spacebar to select Yes. Press Enter. When the data transfer is complete: — If you selected Yes in Step 4, the unit is reset. — If you selected No in Step 4, the Transfer Status field changes to Completed successfully.
  • Page 42 3. Initial Startup and Configuration 3-18 December 2001 7900-A2-GB21-20...

  • Page 43: Configuring The Unit Using The Internal Switches

    Configuring the Unit Using the Internal Switches Overview You can make configuration changes through a VT100-compatible terminal and the unit’s Configuration menus or by manually changing switches on the board. The unit is shipped with the switchpacks disabled to allow settings to be made through the Configuration menus.

  • Page 44: Configuring The Unit Using Internal Switches

    4. Configuring the Unit Using the Internal Switches Configuring the Unit Using Internal Switches Use internal Switchpacks S3 and S4 to manually configure the unit. Use Figure 4-1, Hotwire Standalone Termination Unit’s Switchpack Switchpacks S3 and S4. HANDLING PRECAUTIONS FOR STATIC-SENSITIVE DEVICES This product is designed to protect sensitive components from damage due to electrostatic discharge (ESD) during normal operation.

  • Page 45: Switchpack Locations

    Switchpack Locations To locate Switchpacks S3 and S4, refer to Termination Unit’s Switchpack Switchpack S3 & S4 1 2 3 4 5 1 2 3 4 5 Figure 4-1. 7900-A2-GB21-20 4. Configuring the Unit Using the Internal Switches Figure 4-1, Hotwire Standalone Locations.

  • Page 46: Model 7974 Switchpack Definitions

    The three switches form a binary value used as an index to the table of equalization values. Off denotes 0 (zero) and On denotes 1 (one). 000 (all OFF) = 0–133 feet Line Equalization, Switches 6 –8 on Switchpack S4 (Model 7974) Line Equalization 0–133 feet 133–266 feet...
  • Page 47 This switch is independent from the position of Switch 1 on Switchpack S4 (switchpack enable/disable). OFF = Current Firmware ON = Previous Firmware DSL Line Rate, Switches 3– 5 on Switchpack S3 (Model 7974) DSL Line Rate 1552 Kbps 144 Kbps...

  • Page 48: Model 7975 Switchpack Definitions

    4. Configuring the Unit Using the Internal Switches Model 7975 Switchpack Definitions For Switchpack S4 definitions, refer to (Model 7975). Table 4-5. Switch # . . . 4, 5, 6, 7, 8 NOTE: Sync Port and DSL Line Rates can only be selected from a unit configured as the LTU (Switchpack S3 #1) with AutoRate disabled (Switchpack S3 #2).
  • Page 49 Table 4-6. Sync Port Payload Rate 2048 Kbps (32 x 64) 1984 Kbps (31 x 64) 1920 Kbps (30 x 64) 1856 Kbps (29 x 64) 1792 Kbps (28 x 64) 1728 Kbps (27 x 64) 1664 Kbps (26 x 64) 1600 Kbps (25 x 64) 1536 Kbps (24 x 64) 1472 Kbps (23 x 64)
  • Page 50 4. Configuring the Unit Using the Internal Switches For Switchpack S3 definitions, refer to (Model 7975). Table 4-7. Switch # . . . 3, 4, 5 Table 4-8. Switch Position NOTE: On 1 Mbps units the DSL line rate defaults to 1040 Kbps (all OFF). Table 4-7, Switchpack S3 Definitions Switchpack S3 Definitions (Model 7975) Allows you to .

  • Page 51: Model 7976 Switchpack Definitions

    Model 7976 Switchpack Definitions For Switchpack S4 definitions, refer to (Model 7976). Table 4-9. Switch # . . . 7900-A2-GB21-20 4. Configuring the Unit Using the Internal Switches Table 4-9, Switchpack S4 Definitions Switchpack S4 Definitions (Model 7976) Allows you to . . . Enable or disable Switchpacks S3 and S4.
  • Page 52 4. Configuring the Unit Using the Internal Switches For Switchpack S3 definitions, refer to (Model 7976). Table 4-10. Switchpack S3 Definitions (Model 7976) Switch # . . . 3, 4, 5 6, 7 Table 4-11. DSL Line Rate, Switches 3– 5 on Switchpack S3 (Model 7976) Switch Position 4-10 Table 4-10, Switchpack S3 Definitions...

  • Page 53: Ip Addressing

    IP Addressing Selecting an IP Addressing Scheme Your IP addressing scheme depends in part upon whether the Hotwire 797x Standalone Termination Unit is connected to a DSLAM card running in IP Conservative mode. Configurations Not Running IP Conservative Software For a configuration not running IP Conservative software, the NTU’s network interface IP address is assigned through the peer IP address of the LTU’s Network Interface menu.

  • Page 54: Ip Addressing Example

    5. IP Addressing Review the following information in preparation for selecting an IP addressing scheme. Any legal host address is allowed for a given subnet. The address choice within the subnet is arbitrary. The Peer IP Address must be unique within the MCC backplane subnet. A single route to a subnet is all that is needed to reach every device on a subnet.

  • Page 55: Security

    Security Overview Security on the standalone Hotwire 797x Standalone Termination Unit is implemented by limiting user access to the ATI through option settings. You can: Enable the Telnet Login Required option. Enable the COM port Login Required option. Limit access by setting a Session Access Level option of Operator for the Telnet session.

  • Page 56: Ati Access Levels

    6. Security ATI Access Levels The unit has two access levels: Administrator and Operator. The access level determines what functions are accessible, as shown in Table 6-1. ATI Access to Menu Functions Status Test Configuration Control Access levels can be applied to Login IDs, the COM port, and Telnet sessions. The effective access level is always the most restrictive: When access is through the COM port and a login is required on the COM port, the effective access level is the more restrictive of the COM port access...

  • Page 57: Creating A Login

    Creating a Login Logins apply to the terminal directory connected to the communication port or Telnet access directly to the ATI of the unit. Six login ID/password combinations are available. Each Login ID and Password must be unique and include an access level. Procedure 1.

  • Page 58: Deleting A Login

    6. Security 3. Create the login by entering the following fields. Login IDs and passwords are case-sensitive. On the Login Entry screen, for the . . . Login ID Password Re-enter Password Access Level NOTE: Assign at least one Administrator-level Login ID. Full access is necessary to make configuration option changes and administer logins.

  • Page 59: Resetting The Unit's Com Port Or Factory Defaults

    Resetting the Unit’s COM Port or Factory Defaults The user interface can be rendered inaccessible with a faulty configuration. Two methods can be used to restore it: Reset COM Port – Allows you to reset the configuration options related to COM port usage.

  • Page 60: Controlling Snmp Access

    6. Security Controlling SNMP Access There are three methods for limiting SNMP access: Disable the SNMP management option. Refer to Management Options, Assign SNMP community names and access types. Limit SNMP access through validation of the IP address of each allowed SNMP manager.

  • Page 61: Monitoring And Troubleshooting

    — Test Status Messages Entry Response Messages Viewing Network Error Statistics Viewing Network Performance Statistics Viewing DSX-1 Performance Statistics (Model 7974) Viewing G.703 Performance Statistics (Model 7976) Viewing Current Network Performance Using the Display LEDs Screen Front Panel LEDs Troubleshooting Table 7-6, recovery.

  • Page 62: Viewing System And Test Status

    7. Monitoring and Troubleshooting Viewing System and Test Status To view System and Test Status information, follow this menu selection sequence: Main Menu main/status/system HEALTH AND STATUS -------------------------------------------------------------------------------- System Operational -------------------------------------------------------------------------------- PgUp The System and Test Status screen has three sections: Health and Status –...

  • Page 63: Health And Status Messages

    Health and Status Messages The following messages can appear in the first column of the System and Test Status screen. The highest priority Health and Status message also appears on all ATI screens on the bottom right. Table 7-1. Message AIS at DSX-1 AIS at G.703 DeviceFailed yyyyyyyy...
  • Page 64 7. Monitoring and Troubleshooting Table 7-1. Message LOF at DSX-1 LOF at G.703 LOS at DSX-1 LOS at G.703 LOS at Net, Pt 1 Mismatch Rate Net Com Link Down Net Margin Threshold NTU/LTU Mismatch Health and Status Messages (2 of 3) What Message Indicates An LOF (Loss Of Frame) condition has been detected...
  • Page 65 Table 7-1. Message NTU TS16 Not Supported OOF at Net Payload Rate Mismatch Primary Clock Failed RAI (Remote Alarm Indication) at G.703 interface, Pt 1 SYNC Pt Down System Operational Yellow Alarm at DSX-1 7900-A2-GB21-20 Health and Status Messages (3 of 3) What Message Indicates The LTU is configured for TS16 signaling and the NTU...

  • Page 66: Self-Test Results Messages

    7. Monitoring and Troubleshooting Self-Test Results Messages The results of the last power-up or reset self-test appear in the middle column of the System and Test Status screen. Table 7-2. Message CPU Failed DataPath Failed Device Failed DSX-1 Failed Sync Port Failed G.703 Failed Failure xxxxxxxx FPGA Download...

  • Page 67: Test Status Messages

    Test Status Messages The Test Status messages in the following table appear in the right column of the System and Test Status screen. Table 7-3. Test Status Message 511 Test Active DCLB Test Active DLB Test Active DTLB Test Active Lamp Test Active LLB Test Active No Test Active...

  • Page 68: Entry Response Messages

    7. Monitoring and Troubleshooting Entry Response Messages The messages in to commands or during data entry. They appear in the messages area at the bottom of the ATI screen and are listed in alphabetical order. Table 7-4. Device Message 0.0.0.0 is an invalid IP address Access level is Operator.
  • Page 69 Table 7-4. Device Message Limit of six Login IDs reached No Security Records to Delete Password Matching Error – Re-enter Password Please Wait Test Active 7900-A2-GB21-20 Entry Response Messages (2 of 2) What Message Indicates An attempt to enter a new login ID was made, and the limit of six login/password combinations has been...

  • Page 70: Viewing Network Error Statistics

    7. Monitoring and Troubleshooting Viewing Network Error Statistics The unit maintains error statistics on the network DSL interface. Statistics are maintained for up to 96 15-minute intervals (24 hours). To view the Network Error Statistics, follow this menu selection sequence: Main Menu main/status/performance/net_error Current Interval Timer: 002...
  • Page 71 Network Error Statistics are collected for: ES (Errored Seconds): Seconds during which one or more CRC error events occurred. SES (Severely Errored Seconds): Seconds during which more than 320 cyclic redundancy check (CRC) error events or at least one Out of Frame (OOF) event occurred.

  • Page 72: Viewing Network Performance Statistics

    7. Monitoring and Troubleshooting Viewing Network Performance Statistics Network performance statistics allow you to monitor the current status of the network DSL operations. Performance statistics can assist you in determining the duration of specific conditions and provide a historical context for problem detection and analysis.
  • Page 73 Network Performance Statistics are collected for: Mrgn: Signal to Noise Ratio (SNR) Margin is the difference of the SNR, measured every 10 seconds, and a set SNR reference value. The acceptable range for SNR Margin is 0 and above. However, it may be practical to tolerate values below 0 on bad lines or longer reaches.

  • Page 74: Viewing Dsx-1 Performance Statistics (Model 7974)

    7. Monitoring and Troubleshooting Viewing DSX-1 Performance Statistics (Model 7974) DSX-1 performance statistics allow you to monitor the current status of DSX-1 interface operations when ESF framing is selected. Performance statistics can assist you in determining the duration of specific conditions and provide a historical context for problem detection and analysis.
  • Page 75 CSS (Controlled Slip Seconds): Seconds during which one or more controlled slips (as defined in TR 54016) occurred. LOFC (Loss of Frame Count): Contains the number of times that an LOF is declared. Status: Contains the contents of the status events register. The status events register maintains a history of specific events that have occurred during an interval.

  • Page 76: Viewing G.703 Performance Statistics (Model 7976)

    7. Monitoring and Troubleshooting Viewing G.703 Performance Statistics (Model 7976) G.703 performance statistics allow you to monitor the current status of the G.703 interface operations. Performance statistics can assist you in determining the duration of specific conditions and provide a historical context for problem detection and analysis.
  • Page 77 CSS (Controlled Slip Seconds): Seconds during which one or more controlled slips (as defined in TR 54016) occurred. LOF (Loss of Frame Seconds): Contains the number of seconds that contain one or more LOF events. Status: Contains the contents of the status events register. The status events register maintains a history of specific events that have occurred during an interval.

  • Page 78: Viewing Current Network Performance

    7. Monitoring and Troubleshooting Viewing Current Network Performance The Current Network Performance Statistics screen allows you to monitor selected current network status and error information for both the near- and far-end units from a single screen. To view Current Network Performance Statistics for a port, follow this menu selection sequence: Main Menu main/status/performance/current...
  • Page 79 Fields on this screen include: Field . . . Current Interval Timer Payload Rate DSL Line Rate 7900-A2-GB21-20 7. Monitoring and Troubleshooting Contains . . . The number of seconds which have elapsed in the current 15-minute interval. Maximum value is 900 seconds (15 minutes). This counter is reset every 15 minutes.

  • Page 80: Using The Display Leds Screen

    7. Monitoring and Troubleshooting Using the Display LEDs Screen The status of the front panel LEDs can be viewed locally and remotely on the Display LEDs Status screen. There are three classes of LEDs: General LEDs display the status of the unit The DTE (DSX-1, Sync Port, or G.703) LED provides the status of the DTE interface The DSL Loop LED displays the activity on the DSL network...

  • Page 81: Front Panel Leds

    Front Panel LEDs Table 7-5, Front Panel front panels. Table 7-5. Label POWER ALARM TEST DSX-1 G.703 * Slow Cycling: LED turns off and on in equal duration once per second. Fast Cycling: LED turns off and on in equal duration 5 times per second. Pulsing: LED turns off momentarily once per second.

  • Page 82: Troubleshooting

    7. Monitoring and Troubleshooting Troubleshooting The unit is designed to provide many years of trouble-free service. If a problem occurs, however, refer to Table 7-6. Symptom ALARM LED is on. An LED is not lit that should be lit. Cannot access the unit via the ATI.
  • Page 83 Table 7-6. Symptom Not receiving data. Power-On Self-Test fails. Only POWER and ALARM LEDs are on after power-on. 7900-A2-GB21-20 Troubleshooting (2 of 2) Possible Cause The network or data port cables are not connected (check front panel LEDs for more information). A test is being executed on the unit (check the TEST LED on the front panel).
  • Page 84 7. Monitoring and Troubleshooting 7-24 December 2001 7900-A2-GB21-20...

  • Page 85: Testing

    To access the Test menu, follow this menu selection sequence: Main Menu main/test -------------------------------------------------------------------------------- Ctrl-a to access these functions, ESC for previous menu 7900-A2-GB21-20 Test TEST (Model 7974) Network & DSX-1 Tests (Model 7975) Network Tests (Model 7976) Network & G.703 Tests (Model 7975) SYNC Data Port Tests...
  • Page 86 SYNC Data Port Tests Device Tests Abort All Tests On . . . To . . . Model 7974 Start and stop tests on the DSX-1 or network interface. Model 7975 Start and stop tests on the network interface. Model 7976 Start and stop tests on the G.703 or network...

  • Page 87: Running Network Tests

    Running Network Tests Network tests require the participation of your network service provider. To access the Network Tests screen, follow this menu selection sequence: Model 7974 (sample screen in Main Menu Model 7975 (sample screen below): Main Menu Model 7976 (sample screen in...

  • Page 88: Network Line Loopback

    8. Testing Network Line Loopback A Network Line Loopback loops the received signal on the network interface back to the network without change. Port Transceiver Procedure To run a Network Line Loopback: 1. Position the cursor at the Start command next to Network Line Loopback on the Network &...

  • Page 89: Remote Network Send Line Loopback

    Remote Network Send Line Loopback The local unit initiates this test by sending a line loopback Up or Down command to the remote unit for 10 seconds. When the remote unit detects the loopback Up command, it puts itself into line loopback and lights the front panel test LED. The remote unit remains in loopback until it receives a loopback Down command or the remote unit’s test timeout value is exceeded.

  • Page 90: Tests (Model 7974)

    8. Testing DSX-1 Tests (Model 7974) To access the Network & DSX-1 Tests screen, follow this menu selection sequence: Main Menu main/test/network_DSX-1 Test -------------------------------------------------------------------------------- Local Loopbacks Network Line Loopback: Network Repeater Loopback: DSX-1 DTE Loopback: Remote Network Loopbacks Send Line Loopback:...

  • Page 91: Network Repeater Loopback (Dsx-1)

    Network Repeater Loopback (DSX-1) A Network Repeater Loopback loops the signal being sent from the data port back to the data port. AIS (Alarm Indication Signal) is sent to the DSL port. Port Procedure To run a DSX-1 Network Repeater Loopback: 1.

  • Page 92: Dsx-1 Dte Loopback

    8. Testing DSX-1 DTE Loopback A DSX-1 DTE Loopback loops the DSX-1 signal back to itself before the signal is sent to the Framer. All Ones Port Procedure To run a DSX-1 DTE Loopback: 1. Position the cursor at the Start command next to DSX-1 DTE Loopback on the Network &...

  • Page 93: Sync Data Port Tests (Model 7975)

    SYNC Data Port Tests (Model 7975) To access the SYNC Data Port Tests screen, follow this menu selection sequence: Main Menu main/test/data Test -------------------------------------------------------------------------------- Local Loopbacks Data Terminal Loopback: Data Channel Loopback: Repeater Loopback: Remote Loopbacks Send Remote DCLB: -------------------------------------------------------------------------------- Ctrl-a to access these functions, ESC for previous menu Use the Command column to start or stop a test.

  • Page 94: Data Terminal Loopback

    8. Testing Data Terminal Loopback A Data Terminal Loopback (DTLB) loops user data back to the DTE. This loopback is located as closely as possible to the user data port (DTE) interface. All Ones Port Procedure To run a Data Terminal Loopback: 1.

  • Page 95: Data Channel Loopback

    Data Channel Loopback A Data Channel Loopback (DCLB) loops the data from the network interface back to the network. This loopback is located as close as possible to the user data port (DTE) interface. Port Procedure To run a Data Channel Loopback: 1.

  • Page 96: Repeater Loopback (Eia-530)

    8. Testing Repeater Loopback (EIA-530) A Repeater Loopback loops the signal being sent from the data port back to the data port. AIS is sent to the DSL port. All Ones Port Procedure To run an EIA-530 Repeater Loopback: 1. Position the cursor at the Start command next to Repeater Loopback on the SYNC Data Port Tests screen.

  • Page 97: Send Remote Data Channel Loopback

    Send Remote Data Channel Loopback The local termination unit can send an Up or Down sequence to request the start or stop of a Data Channel Loopback (DCLB) on a remote unit. Port Interface Procedure To send a Remote DCLB: 1.

  • Page 98: Tests (Model 7976)

    8. Testing G.703 Tests (Model 7976) To access the Network & G.703 Tests screen, follow this menu selection sequence: Main Menu main/test/network_G.703 Test -------------------------------------------------------------------------------- Local Loopbacks Network Line Loopback: Network Repeater Loopback: G.703 DTE Loopback: Remote Loopbacks Send Line Loopback: Down Pattern Tests Send and Monitor 511 --------------------------------------------------------------------------------...

  • Page 99: Network Repeater Loopback (G.703)

    Network Repeater Loopback (G.703) A Network Repeater Loopback (RLB) loops the signal being sent from the data port back to the data port. AIS is sent to the DSL port. Port Procedure To run a G.703 Network Repeater Loopback: 1. Position the cursor at the Start command next to Network Repeater Loopback on the Network &...

  • Page 100: G.703 Dte Loopback

    8. Testing G.703 DTE Loopback A G.703 DTE Loopback loops the G.703 signal back to itself before the signal is sent to the Framer. Activating the G.703 DTE Loopback test causes the EOC, which is used for management, to be lost to the remote unit. All Ones Port Procedure...

  • Page 101: Device Tests

    Device Tests The Device Tests branch is used to access the only card-level test, the Lamp Test. To access the Device Tests screen, follow this menu selection sequence: Main Menu main/test/card -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Ctrl-a to access these functions, ESC for previous menu Lamp Test The Lamp Test determines whether all LEDs are lighting and functioning properly.

  • Page 102: Ending An Active Test

    8. Testing Ending an Active Test A test initiated by the user can be ended using: Test Timeout option – Enable the Test Timeout system option so the unit can automatically terminate tests, and set the Test Duration (min) option to specify the amount of time that tests can run before the unit terminates the test.

  • Page 103: Telco-Initiated Tests (Model 7974)

    Message-Oriented Telco-Initiated Line Loopback The Model 7974 supports Line Loopback, as specified in AT&T TR 54016, AT&T TR 62411, and ANSI T1.403. A Telco-initiated Line Loopback loops the received signal on the DSX-1 interface back to the DSX-1 interface without modification.

  • Page 104: Telco-Initiated Remote Line Loopback

    8. Testing Telco-Initiated Remote Line Loopback If the Remote Telco Line Loopback system option is enabled, a Telco-initiated Line Loopback loops received data at the remote unit and passes it back to the Telco through the local unit. Remote DSX-1 Port Framer Framer...

  • Page 105: Configuration Options

    All changes to configuration options must be saved. Refer to Configuration Options 7900-A2-GB21-20 To Access the . . . Network Interface Options (Table A-1) DSX-1 Interface Options for Model 7974 (Table A-5) Synchronous Data Port Options for Model 7975 (Table A-6) G.703 Interface Options for Model 7976...

  • Page 106: Network Interface Options Menu

    A. Configuration Options Network Interface Options Menu For Network Interface Options, refer to To access the Network Interface Options screen, follow this menu selection sequence: Main Menu main/config/network Circuit Identifier: -------------------------------------------------------------------------------- Ctrl-a to access these functions, ESC for previous menu Save Table A-1.
  • Page 107 Disable – The LTU Line rate is user selectable and is based on the DSL Line Rate selected. DSL Line Rate Possible Settings (Model 7974): 144, 272, 400, 528, 784, 1040, 1552 Default Setting: 1552 Possible Settings (Models 7975, 7976): 144, 272, 400, 528, 784, 1040, 1552, 2064 Default Setting: 2064 Determines the fixed line rate of the LTU when AutoRate is disabled.
  • Page 108 Table A-1. Network Interface Options (3 of 3) EIA-530 Payload Rate Possible Settings (Model 7974): 64, 128, 256, 384, 512, 768, 1024, 1536 Default Setting: [Highest multiple of 64 Kbps supported by the DSL Line Rate] Possible Settings (Model 7976): 64, 128, 192, 256, 320, 384, 448, 512, 576, 640, 768,...
  • Page 109 Table A-2, Payload Rates and DSL Line Rates for Rates and DSL Line Rates for each DSL line rate and the number of time slots required to achieve that payload rate. For G.703, the payload rate depends on whether you are using signaling (time slots 0 and 16) or data only (time slot 0).
  • Page 110 A. Configuration Options Table A-4. Payload Rates for EIA-530-to-EIA-530 Configurations DSL Line Rate (Kbps) 2064 1552 1040 Supported Payload Rates 1600, 1664, 1728, 1792, 1856, 1920, 1984, 2048 1088, 1152, 1216, 1280, 1344, 1408, 1472, 1536 832, 896, 960, 1024 576, 640, 704, 768 448, 512 320, 384...

  • Page 111: Dsx-1 Interface Options For Model 7974

    DSX-1 Interface Options for Model 7974 For DSX-1 Interface Options, refer to 7974. To access the DSX-1 Interface Options screen, follow this menu selection sequence: Main Menu main/config/DSX-1 -------------------------------------------------------------------------------- Ctrl-a to access these functions, ESC for previous menu Save Table A-5. DSX-1 Interface Options for Model 7974 (1 of 2)
  • Page 112 A. Configuration Options Table A-5. DSX-1 Interface Options for Model 7974 (2 of 2) Line Equalization Possible Settings: 0–133, 133–266, 266–399, 399–533, 533–655 Default Setting: 0–133 Compensates for signal distortion for a DSX-1 signal over a given distance. 0–133 feet – Provides equalization for a cable length up to 133 feet.

  • Page 113: Synchronous Data Port Options For Model 7975

    Synchronous Data Port Options for Model 7975 For Synchronous Data Port Options, refer to Options for Model follow this menu selection sequence: Main Menu main/config/sync_data -------------------------------------------------------------------------------- Ctrl-a to access these functions, ESC for previous menu Table A-6. Synchronous Data Port Options for Model 7975 (1 of 4) Port Type Possible Settings: E530A, V.35, RS449, X.21 Default Setting: E530A...
  • Page 114 A. Configuration Options Table A-6. Synchronous Data Port Options for Model 7975 (2 of 4) Payload Rate Possible Settings: 64, 128, 192, 256, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896, 960, 1024, 1088, 1152, 1216, 1280, 1344, 1408, 1472, 1536, 1600, 1664, 1728, 1792, 1856, 1920, 1984, 2048 Default Setting: [Highest multiple of 64 Kbps supported by the DSL Line Rate] NOTE: Payload rates of 1088 Kbps and higher pertain only to 2 Mbps models.
  • Page 115 Table A-6. Synchronous Data Port Options for Model 7975 (3 of 4) Send All Ones on Data Port Not Ready Possible Settings: Both, Disable, DTR, RTS Default Setting: Both Specifies the conditions on the data port that determine when valid data is not being sent from the DTE.
  • Page 116 A. Configuration Options Table A-6. Synchronous Data Port Options for Model 7975 (4 of 4) Port (DTE) Initiated Loopbacks Possible Settings: Disable, DTLB, DCLB, Both Default Setting: Disable Allows the initiation and termination of a local Data Terminal Loopback (DTLB) or remote Data Channel Loopback (DCLB) by the DTE connected to this port.

  • Page 117: G.703 Interface Options For Model 7976

    G.703 Interface Options for Model 7976 For G.703 Interface Options, refer to Model 7976. To access the G.703 Interface Options screen, follow this menu selection sequence: Main Menu main/config/G.703 -------------------------------------------------------------------------------- Ctrl-a to access these functions, ESC for previous menu Save Table A-7.
  • Page 118 A. Configuration Options Table A-7. G.703 Interface Options for Model 7976 (2 of 2) Line Framing Possible Settings: CRC4, noCRC4 Default Setting: noCRC4 Specifies the framing format to be used by the G.703 interface. Line Framing is only available when the standalone unit is configured as an LTU. The NTU is automatically configured to match the framing format used by the LTU.

  • Page 119: System Options Menu

    Test Duration (min): Telco Initiated Loopback: Enable Remote Telco Line Loopback: Disable G.703 Line Termination: 120 Ohm Running Network Tests December 2001 A. Configuration Options System Model: 797x (Model 7974) (Model 7974) (Model 7976) MainMenu Exit in Chapter 8, Testing . A-15...
  • Page 120 Test Duration (min) appears when Test Timeout is enabled. 1 – 120 – Amount of time in minutes a test runs before terminating. Telco Initiated Loopback (Model 7974) Possible Settings: Enable, Disable Default Setting: Enable Determines if the unit responds to loopback commands on the DSX-1 interface. See Telco-Initiated Line Loopback Enable –...

  • Page 121: Communication Port

    Communication Port For Communication Port Options, refer to To access the Communication Port screen, follow this menu selection sequence: Main Menu When Port Use is set to Terminal, the following screen appears: main/config/com ------------------------------------------------------------------------------- Ctrl-a to access these functions, ESC for previous menu When Port Use is set to Net Link, the following screen appears: main/config/com -------------------------------------------------------------------------------...
  • Page 122 A. Configuration Options Table A-9. Communication Port Options (1 of 3) Port Use Possible Settings: Terminal, Net Link Default Setting: Terminal Specifies how the communications port is to be used. Terminal – The communication port is used for the asynchronous terminal interface. Net Link –...
  • Page 123 Table A-9. Communication Port Options (2 of 3) Parity Possible Settings: None, Odd, Even Default Setting: None Specifies the parity of the communication port. Parity only appears when Port Use is set to Terminal. None – No parity used. Odd – Odd parity used. Even –...
  • Page 124 A. Configuration Options Table A-9. Communication Port Options (3 of 3) Port Access Level Possible Settings: Administrator, Operator Default Setting: Administrator Specifies the highest level of access allowed when accessing an ATI session through a Telnet session. Port Access Level only appears when Port Use is set to Terminal. Administrator –...

  • Page 125: Management And Communication Options Menu

    Management and Communication Options Menu The Management and Communication Options Menu includes the following: Telnet Session Options Communication Protocol Options General SNMP Management Options SNMP NMS Security Options SNMP Traps Options Telnet Session Options Telnet Session configuration options control whether a Telnet session is allowed through an interconnected IP Network.
  • Page 126 A. Configuration Options Table A-10. Telnet Session Options Telnet Session Possible Settings: Enable, Disable Default Setting: Enable Specifies if the unit responds to a Telnet session request from a Telnet client on an interconnected IP network. Enable – Telnet sessions are allowed between the unit and a Telnet client. Disable –...

  • Page 127: Communication Protocol Options

    Table A-10. Telnet Session Options Disconnect Time (Minutes) Possible Settings: 1 – 60 Default Setting: 5 Number of minutes of user inactivity before a Telnet session terminates automatically. Time out is based on no keyboard activity. Disconnect Time (minutes) appears only when the Inactivity Timeout option is enabled.
  • Page 128 A. Configuration Options Table A-11. Communication Protocol Options (1 of 2) Node IP Address Possible Settings: 001.000.000.000 – 223.255.255.255 Default Setting: 000.000.000.000 Specifies the Node IP address. The IP address is not bound to a particular port, and can be used for remote access over the EOC. Node IP Address is only available when the unit is configured as an LTU.

  • Page 129: T Communication Port

    Table A-11. Communication Protocol Options (2 of 2) Communication Port IP Address Possible Settings: 001.000.000.000 – 223.255.255.255 Default Setting: 000.000.000.000 Specifies the unit’s Communication Port IP Address when the unit is configured as a network communication link. Communication Port IP Address is only used when the Port Use option on the Communication Port Options menu is set to Net Link.

  • Page 130: General Snmp Management Options

    A. Configuration Options General SNMP Management Options To access the General SNMP Management Options screen, follow this menu selection sequence: Main Menu Management and Communication main/config/management/SNMP SNMP Management: Community Name 1: Name 1 Access: Community Name 2: Name 2 Access: ------------------------------------------------------------------------------- Ctrl-a to access these functions, ESC for previous menu Save...
  • Page 131 A. Configuration Options Table A-12. General SNMP Management Options SNMP Management Possible Settings: Enable, Disable Default Setting: Disable Enables or disables the SNMP management features. Enable – Enables SNMP management capabilities. Disable – Disables SNMP management capabilities. Community Name 1 Possible Settings: ASCII text field Default Text: public Identifies the name of the community allowed to access the unit’s MIB.

  • Page 132: Snmp Nms Security Options

    A. Configuration Options SNMP NMS Security Options To access the SNMP NMS Security Options screen, follow this menu selection sequence: Main Menu Management and Communication main/config/management/security 1 IP Address: 2 IP Address: 3 IP Address: 4 IP Address: 5 IP Address: 6 IP Address: 7 IP Address: 8 IP Address:...
  • Page 133 A. Configuration Options Table A-13. SNMP NMS Security Options NMS IP Validation Possible Settings: Enable, Disable Default Setting: Disable Specifies whether security checking is performed on the IP address of SNMP management systems attempting to access the node. Enable – Security checking is performed on the IP address of SNMP management systems attempting to access the node.

  • Page 134: Snmp Traps Options

    A. Configuration Options SNMP Traps Options An SNMP trap can be automatically sent out through the EOC or the Management port to an SNMP manager when the Hotwire 797x Standalone Termination Unit detects conditions set by the user. Refer to SNMP Traps, for details of SNMP traps supported by the unit.
  • Page 135 Table A-14. SNMP Traps Options (1 of 2) SNMP Traps Possible Settings: Enable, Disable Default Setting: Disable Controls the generation of SNMP trap messages. Enable – SNMP trap messages are sent out to SNMP managers. Disable – No SNMP trap messages are sent out. Number of Trap Managers Possible Settings: 1, 2, 3, 4, 5, 6, 7, 8, 9 Default Setting: 1...
  • Page 136 A. Configuration Options Table A-14. SNMP Traps Options (2 of 2) General Traps Possible Settings: Disable, Warm, AuthFail, Both Default Setting: Both Determines which SNMP traps are sent to each trap manager. Disable – No general trap messages are sent. Warm –...

  • Page 137: Ifindex Variable Binding

    B-2 on page B-2 on page B-3 on page B-5 Description COM Port DSL Interface DSX-1 or G.703 Interface EIA-530-A Interface EOC Management Link December 2001 Supported By All models All models Models 7974 and 7976 Model 7975 All models...

  • Page 138: Warmstart

    B. Standards Compliance for SNMP Traps In general, all traps have at a minimum a variable binding of ifIndex. For a standalone NTU connected to a DSLAM running IP Conservative software, all traps have at a minimum a variable binding of the Super Overloaded ifIndex (SOI). The formula for the SOI is: ((LTU Slot Number) * 1,000,000) + ((LTU DSL Port Number) * 1,000)

  • Page 139: Linkup And Linkdown

    linkUp and linkDown The link SNMP traps are: linkUp – The unit recognizes that one of the communication interfaces is operational. linkDown – The unit recognizes that one of the communication interfaces is not operational. The network and synchronous port interfaces (physical sublayer) are represented by an entry in the MIB-II Interfaces table and supported by the DS1 MIB.
  • Page 140 B. Standards Compliance for SNMP Traps linkUp/Down variable bindings (continued) fType (RFC 1573) This object is the type of interface: – propPointToPointSerial(22) Used for the EOC. – ds1(18) Used for DSX-1 interface. – e1(19) Used for G.703 interface. – propPointToPointSerial(22) Used for EOC.

  • Page 141: Enterprise-Specific Traps

    Enterprise-Specific Traps The enterpriseSpecific trap indicates that an enterprise-specific event has occurred. The Specific-trap field identifies the particular trap that occurred. The following table lists the enterprise-specific traps supported by the unit: SNMP Trap enterprisePrimary- ClockFail(1) enterpriseSelfTest- Fail(2) enterpriseDevice- Fail(3) enterpriseSecondary- ClockFail(4) enterpriseTestStart(5)
  • Page 142 B. Standards Compliance for SNMP Traps SNMP Trap enterpriseFallback AutoRate(13) enterprisePrimary- ClockFailClear(101) enterpriseSecondary- ClockFailClear(104) enterpriseTest- Stop(105) enterpriseFallback AutoRateClear(113) Description Possible Cause After a loss of signal, the unit Variable line conditions. resynchronized to a lower rate than the last known rate. Variable bindings: ifIndex (RFC 1573) ifAdminStatus...
  • Page 143 Tests that affect the enterpriseTestStart and enterpriseTestStop traps and the variable bindings depend on the interface. The specific tests and variable bindings are described in the following table: Interface DSL Network 7900-A2-GB21-20 B. Standards Compliance for SNMP Traps enterpriseTestStart/Stop variable bindings Possible Cause ifIndex (RFC 1573) enterpriseTestStart –...
  • Page 144 B. Standards Compliance for SNMP Traps Interface DSX-1 or G.703 EIA-530-A enterpriseTestStart/Stop variable bindings Possible Cause ifIndex (RFC 1573) enterpriseTestStart – Any one of the following tests is ifAdminStatus (RFC 1573) active on the interface: ifOperStatus (RFC 1573) – DTE Loopback –...
  • Page 145 Connectors, Cables, and Pin Assignments Overview The following sections provide pin assignments for: Power Input Connector COM Port Connector COM Port-to-PC Cable COM Port-to-LAN Adapter Cable DSX-1/G.703 Network Interface EIA-530-A Port EIA-530-A-to-X.21 Interface EIA-530-A-to-RS-449 Interface EIA-530-A-to-V.35 Interface DSL Network Interface Cable 7900-A2-GB21-20 on page C-2 on page C-2...

  • Page 146: Power Input Connector

    C. Connectors, Cables, and Pin Assignments Power Input Connector The input power connector leads are shown in Pin 1 is at the lower right of the connector and Pin 6 at the upper left as you face the back of the unit. Table C-1.

  • Page 147: Com Port-To-Pc Cable

    COM Port-to-PC Cable The COM port can be connected to an asynchronous terminal or a PC running terminal emulation software. The COM port-to-PC cable is a 14-foot, 26 AWG, 8-conductor cable with an 8-position unkeyed modular connector and a DB9 socket connector.

  • Page 148: Com Port-To-Lan Adapter Cable

    C. Connectors, Cables, and Pin Assignments COM Port-to-LAN Adapter Cable The COM port can be configured for network management and attached to an Ethernet LAN adapter. The COM port-to-LAN adapter cable is a 14-foot, 24 AWG, 6-conductor cable with an 8-position unkeyed modular connector at either end. Figure C-2, COM Port-to-PC Cable (Feature Number (DCE) Tx Clock...

  • Page 149: Dsx-1/G.703 Network Interface

    DSX-1/G.703 Network Interface The G.703 interface is either two BNC connectors (Transmit and Receive) for a 75-ohm unbalanced interface, or an RJ48C, 8-position, unkeyed modular connector for a 120-ohm balanced interface. See 120-Ohm Balanced Interface 120-Ohm Network Interface Adapter Cable (Feature Number The DSX-1 network interface is an RJ48C, 8-position, unkeyed modular connector for a 100-ohm balanced interface.

  • Page 150: Eia-530-A Port

    C. Connectors, Cables, and Pin Assignments EIA-530-A Port The EIA-530-A Port interface connector information is shown in EIA-530-A Port Interface Table C-4. EIA-530-A Port Interface Connector Signal Shield Signal Common Signal Common Transmitted Data Received Data Request to Send Clear to Send Received Line Signal Detector DCE Ready DTE Ready...

  • Page 151: Eia-530-A-To-X.21 Interface

    EIA-530-A-to-X.21 Interface The EIA-530-A-to-X.21 adapter cable Feature Number X.21 Cable DB25 SIGNAL PLUG TD-A TD-B RD-A RD-B RXC-A RXC-B RTS-A RTS-B RLSD-A RLSD-B SIG. COMMON TT-A TT-B Figure C-4. 7900-A2-GB21-20 C. Connectors, Cables, and Pin Assignments (Figure C-4, EIA-530-A-to-X.21 (Cable 7900-F1-504)) provides the X.21 interface shown in Interface.
  • Page 152 C. Connectors, Cables, and Pin Assignments Table C-5. X.21 Cable Interface Signal Signal Common Transmitted Data Received Data Request to Send Data Channel Received Line Signal Detector Transmit Signal Element Timing (DTE Source) Receiver Signal Element Timing (DCE Source) ITU-T Number December 2001 Direction...

  • Page 153: Eia-530-A-To-Rs-449 Interface

    EIA-530-A-to-RS-449 Interface The EIA-530-A-to-RS-449 adapter cable Pinouts (Feature Number Table C-6, RS-449 Cable DB25 SIGNAL PLUG SHIELD TD-A TD-B RD-A RD-B TXC-A TXC-B RXC-A RXC-B RTS-A RTS-B CTS-A CTS-B RLSD-A RLSD-B SIG. COMMON RCV. COMMON TT-A TT-B SIG. COMMON Figure C-5. 7900-A2-GB21-20 C.
  • Page 154 C. Connectors, Cables, and Pin Assignments Table C-6. RS-449 Cable Interface Signal Shield Signal Ground Receive Ground Send Common Send Data Receive Data Request to Send Clear to Send Receiver Ready Data Mode Terminal Ready Terminal Timing Send Timing Receive Timing Local Loopback Remote Loopback Test Mode...

  • Page 155: Eia-530-A-To-V.35 Interface

    EIA-530-A-to-V.35 Interface The EIA-530-A-to-V.35 adapter cable or adapter Adapter Cable (Feature Number 7900-F1-503) and EIA-530-A-to-V.35 Adapter (Feature Number 7900-F1-516) Table C-7, V.35 Cable Pin 1 DB25 SIGNAL PLUG SHIELD TD-A TD-B RD-A RD-B TXC-A TXC-B RXC-A RXC-B RLSD SIG. COMMON TT-A TT-B SIG.
  • Page 156 C. Connectors, Cables, and Pin Assignments Table C-7. V.35 Cable Interface Signal Shield Signal Common Transmitted Data Received Data Request to Send Clear to Send Data Channel Received Line Signal Detector Data Set Ready Data Terminal Ready Transmit Signal Element Timing (DTE Source) Transmit Signal Element Timing (DCE Source)

  • Page 157: Dsl Network Interface Cable

    DSL Network Interface Cable The DSL line interface cable is a 20-foot, 24 AWG solid, 2-twisted-pair cable that is RJ48C-to-RJ48C. See Figure C-7, DSL Network Interface Cable with RJ48C Connector (Feature Number 7900-F1-514). Table C-8. DSL Network Interface Connector Pin Number DSL Signal Ring Ring Figure C-7.
  • Page 158 C. Connectors, Cables, and Pin Assignments C-14 December 2001 7900-A2-GB21-20...

  • Page 159: Technical Specifications

    Physical Environment Operating temperature Storage temperature Relative humidity * Technical specifications are subject to change without notice. 7900-A2-GB21-20 Termination Units, Models 7974-A2, 7975-A2, and 7976-A2 Criteria* Width: 7.25 inches (18.4 cm) Height: 1.5 inches (3.8 cm) Length: 9.4 inch (24.9 cm) Approximately 1.25 lbs.
  • Page 160 D. Technical Specifications December 2001 7900-A2-GB21-20...
  • Page 161 AutoRate, 3-15 ceiling, A-3 ceiling (DSL Line Rate), A-3 Network Interface Options screen, A-3 resetting, 3-15 switch setting Model 7974, 4-5 Model 7975, 4-8 Model 7976, 4-10 7900-A2-GB21-20 cables, C-1 COM Port Interface Cable, C-3 COM Port to LAN Adapter Cable, C-4 COM Port-to-PC cable, C-3–C-4...
  • Page 162 A-5 AutoRate ceiling, A-3 effect on AutoRate, A-3 Fixed Rate, A-5 Network Interface Options screen, A-3 switch setting Model 7974, 4-5 Model 7975, 4-8 Model 7976, 4-10 DSLAM defined, 1-2 DSX-1 DTE Loopback, 8-8 Failed self-test result, 7-6...
  • Page 163 6-5 Failure, self-test result, 7-6 feature numbers, cables, D-1 features, 1-2 firmware download from server, 3-16 select with switch Model 7974, 4-5 Model 7975, 4-8 Model 7976, 4-10 Framing, G.703 interface, A-13 Front Panel LEDs, 1-4 G.703 interface options, A-13...

  • Page 164: Snmp Nms Security Options

    Node IP Address, A-24 Node Subnet Mask, A-24 LTU combinations supported, 1-3 LTU Mismatch, Health and Status message, 7-4 switch setting for Model 7974, 4-5 Model 7975, 4-8 Model 7976, 4-10 Number of Trap Managers, A-31 IN-4 OK ED, 7-21...
  • Page 165 Current Network Performance Statistics, 7-18 status, test messages, 7-7 subnet IP addresses, 5-1 switchpacks configuration using, 4-1 definitions Model 7974, 4-4 Model 7975, 4-6 Model 7976, 4-9 enabling and disabling Model 7974, 4-4 Model 7975, 4-6 Model 7976, 4-9 location, 4-3...
  • Page 166 Index Test aborting, 8-18 Data Channel Loopback, 8-11 Terminal Loopback, 8-10 DTE Loopback DSX-1, 8-8 G.703, 8-16 Duration, A-16 LED, 7-21 Line Loopback, 8-4 menu, 8-14 Network Initiated DCLB, A-11 Repeater Loopback (DSX-1), 8-7 Repeater Loopback (G.703), 8-15 Port (DTE) Initiated Loopbacks, A-12 Remote Send Line Loopback, 8-5 status messages, 7-7 switch setting for telco loopbacks, 4-5...

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