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Paradyne HOTWIRE 7900 User Manual

Hotwire model 7900 basic maintenance processor
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HOTWIRE
MODEL 7900
BASIC MAINTENANCE
PROCESSOR
USER'S GUIDE
Document No. 7900-A2-GB20-00
March 1998

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Summary of Contents for Paradyne HOTWIRE 7900

  • Page 1 HOTWIRE MODEL 7900 BASIC MAINTENANCE PROCESSOR USER’S GUIDE Document No. 7900-A2-GB20-00 March 1998...
  • Page 2 Paradyne Corporation, 8545 126th Ave. N., Largo, FL 33773. Paradyne Corporation makes no representation or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for a particular purpose. Further, Paradyne Corporation reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of Paradyne Corporation to notify any person of such revision or changes.
  • Page 3 Important Regulatory Information Important Safety Instructions 1. Read and follow all warning notices and instructions marked on the product or included in the manual. 2. Slots and openings in the cabinet are provided for ventilation. To ensure reliable operation of the product and to protect it from overheating, these slots and openings must not be blocked or covered.
  • Page 4 The authority to operate this equipment is conditioned by the requirements that no modifications will be made to the equipment unless the changes or modifications are expressly approved by Paradyne Corporation.

  • Page 5: Table Of Contents

    Contents About This Guide Document Purpose and Intended Audience ......Document Summary ..........Product-Related Documents .
  • Page 6 Contents MTU-M Status and Performance Functions Viewing Status from your System Terminal ......Viewing the General Status of all xTU-Cs .
  • Page 7 Contents Testing Detecting a Problem ..........Understanding Loopbacks .
  • Page 8 Contents This page intentionally left blank. March 1998 7900-A2-GB20-00...

  • Page 9: About This Guide

    This guide contains information needed to install, configure, and operate the Hotwire Model 7900 Basic Maintenance Processor (also known as an MTU-M nest card) for nest-mounted Hotwire 7900 termination units. It is expected that readers of this document are central office/site (CO) or special...

  • Page 10: Product-Related Documents

    Hotwire Model 7925 Standalone T1 HDSL Termination Unit, G.703 Interface, User’s Guide Contact your sales or service representative to order additional product documentation. Paradyne documents are also available on the World Wide Web at: http://www.paradyne.com Select Service & Support Technical Manuals...

  • Page 11: About The Hotwire Model 7900 Basic Maintenance Processor

    About the Hotwire Model 7900 Basic Maintenance Processor What is the MTU-M The Hotwire Model 7900 Basic Maintenance Processor (MTU-M) card is a processor circuit card assembly (CCA) that mounts into a Hotwire Model 7900 Nest. It is used to monitor the status of the Hotwire Digital Subscriber Line (DSL) cards and Hotwire Remote Termination Units (RTUs) from either of the following: A Network Management System using Simple Network Management MTU-M...
  • Page 12 About the Hotwire Model 7900 Basic Maintenance Processor If you have multiple nests, the MTU-M is installed in the top nest (Nest 1) and that nest is then referred to as the primary nest. Additional expansion nests are connected to the primary nest through RJ48 connectors located on the nest rear panel (refer to Chapter 2, MTU-M Installation Procedures Nest card termination units are referred to as xTU-C/Rs.

  • Page 13: Mtu-M Standard Features

    About the Hotwire Model 7900 Basic Maintenance Processor MTU-M Standard Features The MTU-M allows you to: Monitor and display network and loop performance statistics for up to 79 nest card termination units and their associated remote termination units (Refer to Chapter 5, MTU-M Status and Performance Functions Monitor network status remotely from an SNMP manager (Refer to...
  • Page 14 About the Hotwire Model 7900 Basic Maintenance Processor This page intentionally left blank. March 1998 7900-A2-GB20-00...

  • Page 15: Mtu-M Installation Procedures

    MTU-M Installation Procedures Package Checklist Verify that your package contains the following: A Hotwire Model 7900 MTU-M System terminal cable (9 pin-to-9 pin) Warranty card Installing the MTU-M The procedures in this guide assume that you have already installed the Hotwire Model 7900 Nest.
  • Page 16 MTU-M Installation Procedures Procedure To install the MTU-M: NOTE: A maximum of four Hotwire Model 7900 nests can be installed into one standard 72-inch equipment rack. If more than one nest is installed in the same equipment rack, install the MTU-M in slot 1 of the top nest. The nest containing the MTU-M is referred to as the primary nest.

  • Page 17: Connecting The Primary Nest To Additional Nests

    MTU-M Installation Procedures Connecting the Primary Nest to Additional Nests Connections between nests are only made from the primary nest (Nest 1) to each expansion nest (Nests 2, 3, and 4). Connecting the primary nest to an expansion nest allows the MTU-M to monitor the nest card termination units in Nests 2, 3, and 4.

  • Page 18: Expansion Nest Numbering Sequence

    MTU-M Installation Procedures Expansion Nest Numbering Sequence A fully populated equipment rack with four 19-inch Hotwire Model 7900 nests and one MTU-M holds 63 nest card termination units. There are 15 nest card termination units in the first nest (primary nest with MTU-M installed) and 16 in each adjacent nest.

  • Page 19: Initial Setup Instructions

    Initial Setup Instructions Accessing the System for the First Time When you install the MTU-M for the first time you must enter network configuration and system operational parameters for the MTU-M. This chapter provides the setup procedures needed to initially configure the MTU-M. NOTE: MTU-M initial setup procedures must be performed locally from a VT100 connected through the DB9 Console port on the MTU-M front panel.

  • Page 20: Entering Initial Network Configuration (Netconfig) Parameters

    Initial Setup Instructions Entering Initial Network Configuration (Netconfig) Parameters The recommended order for entering network configuration parameters is: MTU-M IP address Subnet Mask Default Gateway SNMP Manager Address Default Gateway Address System Name, Contact, and Location NOTE: The default values are recorded in Appendix B, Netconfig and Sysconfig Menu Values .

  • Page 21: Entering Initial System Configuration (Sysconfig) Parameters

    Initial Setup Instructions Entering Initial System Configuration (Sysconfig) Parameters Use the following procedure to set your initial system configuration parameters from the System Terminal. NOTE: Default values are recorded in Appendix B, Netconfig and Sysconfig Menu Values . When changing network configurations, it is helpful to first write the current values down in the table provided in Appendix Procedure...

  • Page 22: Additional Sysconfig Setup Considerations

    Initial Setup Instructions Additional Sysconfig Setup Considerations Depending on the number of nest cards you have, you may need to adjust the Polling Range, Polling Interval, and Pollto options on the Sysconfig menu: Polling Range – Defines the range of nest cards that the MTU-M will poll. Adjust the polling range to match the number of total nest cards in your system starting with slot 2.

  • Page 23: System Terminal Interface

    System Terminal Interface Connecting a System Terminal You can connect a system terminal directly or through a modem to the MTU-M front panel. The system terminal must be a VT100-compatible terminal or a PC running emulation software. The system terminal provides a menu-driven interface to the MTU-M card that allows you to: Monitor the status of HDSL and SDSL nest card termination units (xTUs) configured as central site/office (CO) ( xTU-Cs)

  • Page 24: Connecting Your System Terminal Through The Mtu-M Front Panel

    System Terminal Interface Connecting Your System Terminal Through the MTU-M Front Panel Procedure To connect your system terminal to the 9-pin connector on the MTU-M front panel: 1. Connect the terminal cable (included) into a COM port on your system terminal.

  • Page 25: Accessing The Mtu-M Through A Modem

    System Terminal Interface Accessing the MTU-M Through a Modem You can access the MTU-M through a modem using the DB9 connector on the MTU-M front panel. Procedure To connect your system terminal to the MTU-M through a modem using the MTU-M front panel DB9 connector: 1.

  • Page 26: Mtu-M Main Menu

    System Terminal Interface 3. Set your modem parameters as follows: — 9600 baud — 8 bit — no parity — 1 stop bit — disable or suppress result codes MTU-M Main Menu The MTU-M automatically boots up upon power up or MTU-M reset and displays a series of status messages as the MTU-M polls and receives information from each xTU-C.

  • Page 27: Menu On/Off Feature

    System Terminal Interface Menu On/Off Feature The MTU-M displays a list of options for each menu level. Once you have become familiar with these menu options you can use the Menu Off command to suppress these menu options. To suppress menu options, type menu off at any MTU-M prompt and press Enter.
  • Page 28 System Terminal Interface This page intentionally left blank. March 1998 7900-A2-GB20-00...

  • Page 29: Mtu-M Status And Performance Functions

    MTU-M Status and Performance Functions Viewing Status from your System Terminal The MTU-M allows you to monitor the general alarm, polling, and circuit status of all xTU-Cs or view the detailed status of a specific xTU-C. The status of the associated xTU-R is monitored through the xTU-C.

  • Page 30: Viewing The General Status Of All Xtu-Cs

    MTU-M Status and Performance Functions The following table provides a description of the Status menu options: Option Function Displays Alarm, Polling, and Circuit status for all xTUs configured as CO. <2—80> Displays detailed status information for the selected xTU-C/R pair. If no remote unit is connected, only status for the CO side is displayed.
  • Page 31 MTU-M Status and Performance Functions The following table provides a description of the System Status screen: Status Function DSL type Indicates the type of card, HTU (HDSL Termination Unit), STU (SDSL Termination Unit), or xTU (unknown card type). Alarm The position of the asterisk within the field indicates the alarm status of each xTU-C.

  • Page 32: Viewing The Detailed Status Of A Specific Xtu-C

    MTU-M Status and Performance Functions Viewing the Detailed Status of a specific xTU-C To access the status of an individual termination unit configured as CO, type the ID number of the termination unit at the For status, enter xtu id or ALL: prompt and press Enter.
  • Page 33 MTU-M Status and Performance Functions Status Function Network input signal Indicates the status of the network input signal. In service Out of service DTR Signal Indicates the Data Terminal is ready to transmit and receive (V.35 CP units only) data. DSR Signal Indicates the Data Set is ready to transmit and receive data.
  • Page 34 MTU-M Status and Performance Functions The following table provides definitions of the fields contained on Screen 2 of the Circuit Status screen: Option Function Card type Identifies xTU-C and xTU-R type. HDSL E1/T1 SDSL E1/T1 Loop Mode Identifies which loop or loops are in use. (HDSL only) Loop A Loop B...

  • Page 35: Accessing Performance Functions

    MTU-M Status and Performance Functions Accessing Performance Functions MTU-M performance functions allow you to view current and past performance information for an individual xTU-C. Performance functions can only be accessed from a system terminal. NOTE: Performance statistics are files of data accumulated and stored by the MTU-M for each nest card termination unit.
  • Page 36 MTU-M Status and Performance Functions 3. Enter a time interval and press Enter. The requested performance data appears. Performance statistic data is stored in intervals of 1 minute, 15 minutes, 1 hour, 12 hours, 24 hours, and 7 days. Choosing a previous interval allows you to view the last complete time interval.
  • Page 37 MTU-M Status and Performance Functions The following table provides definitions of the fields contained in the Line Error Statistics table: Field Contains Code Violation – Displays the number of code violations detected (E1 only) within the specified time period. Multi-frame Out of Sync – Indicates the number of multiframes (T1 only) received out of synchronization within the specified time period.
  • Page 38 MTU-M Status and Performance Functions This page intentionally left blank. 5-10 March 1998 7900-A2-GB20-00...

  • Page 39: Mtu-M Maintenance Functions

    MTU-M Maintenance Functions Accessing MTU-M Maintenance Menu Functions MTU-M Maintenance functions allow you to: Set and view the MTU-M date and time Change MTU-M system configuration parameters Change MTU-M network configuration parameters Start, stop, and control cycle time of MTU-M status polling Clear MTU-M alarm and status registers To access the MTU-M Maintenance functions from the MTU-M Main Menu, type m at the MTU-M –>...

  • Page 40: Viewing The Mtu-M Date And Time (Date)

    MTU-M Maintenance Functions The following table provides a description of the Maintenance menu options: Command Function time_set Allows you to set the MTU-M time and date. The time and date are used for alarm logging. date Displays current MTU-M time and date. sysconfig Displays current operating parameter settings and provides a menu for changing the MTU-M operating parameters.

  • Page 41: Changing Mtu-M Date And Time (Time_Set)

    MTU-M Maintenance Functions Changing MTU-M Date and Time (time_set) Procedure To change the MTU-M date or time: 1. From the Maintenance Menu, type t at the maint –> prompt and press Enter. 2. Enter the new date and time in the format shown and press Enter. Menu path: Main Maintenance time_set...

  • Page 42: Changing Mtu-M Operational Parameters (Sysconfig)

    MTU-M Maintenance Functions Changing MTU-M Operational Parameters (sysconfig) The sysconfig option on the Maintenance menu is used to display and change several parameters that affect MTU-M operation. Type sys at the maint –> prompt, to display the Operating Parameters screen (values displayed depend on your current configuration): NOTE: If in the course of making changes you want to start over with the current...
  • Page 43 MTU-M Maintenance Functions The following table provides a description of the operations parameters: Field Function EEPROM values are Displays the current status of the xTU-C EEPROM values. Polling Range Displays the maximum and minimum xTU-C polling address. The maximum possible xTU-C address is the right-most card in the lowest nest.
  • Page 44 MTU-M Maintenance Functions The following table provides a description of the Operations Parameters Menu. maxhtu Valid Values: 2 to 80 Default Setting: 80 Sets the maximum xTU polling address. xTU addressing counts the number of slots in the nests, from left to right, top to bottom. The maximum possible xTU address is the E x pansion Nest Numbering Sequence right-most card in the lowest nest.

  • Page 45: Changing Mtu-M Network Parameters (Netconfig)

    MTU-M Maintenance Functions Changing MTU-M Network Parameters (netconfig) The Netconfig option on the Maintenance menu is used to display and change network parameters that affect MTU-M. Type net at the maint –> prompt, to display the Network Configuration Menu screen (values displayed depend on your current network configuration): Changes to MTU-M Network parameters do not take effect until you Quit the MTU-M Operations Parameters menu and save your changes.
  • Page 46 MTU-M Maintenance Functions The following table provides a description of the network management options: Field Function IP Address Contains the IP address of the MTU-M card itself. Subnet Mask Contains the Subnet Mask of the MTU-M card. SNMP Manager Contains the IP Address of your SNMP Manager. Address Default Gateway Contains the address of the gateway that is to be used to reach...

  • Page 47: Silencing External Alarms (Aco)

    MTU-M Maintenance Functions Menu path: Main Maintenance Netconfig (Screen 3 of 3) maint–>net MTU–M Network Parameters COMMAND -Mac Address - set ip address 1 -My IP Address - set subnet mask 2 -Subnet Mask - set snmp manager address 3 -SNMP Manager Address - set default gateway address 4 -Default Gateway - set broadcast address...

  • Page 48: Clearing Mtu-M Alarms And Status Information (Clear)

    MTU-M Maintenance Functions Clearing MTU-M Alarms and Status Information (clear) The clear option on the Maintenance menu is used to clear the current MTU-M alarms and status information for a specific xTU. NOTE: Performance data is accumulated and stored by the MTU-M for each xTU. Swapping or removing an xTU-C does not clear the data stored in these files within the MTU-M.

  • Page 49: Clearing Xtu-C Alarms From The Mtu-M (Al_Clear)

    MTU-M Maintenance Functions Clearing XTU-C Alarms from the MTU-M (al_clear) The al_clear option on the Maintenance menu is used to clear the current MTU-M alarms for a specific xTU. Procedure To clear alarms: 1. Type al at the maint –> prompt. 2.

  • Page 50: Taking The Xtu-C Out Of The Mtu-M Polling Cycle (Stoppoll)

    MTU-M Maintenance Functions Taking the xTU-C out of the MTU-M Polling Cycle (stoppoll) The stoppoll option on the Maintenance menu is used to halt the monitoring and alarm reporting of a specific xTU-C/R pair by removing it from the MTU-M polling cycle.

  • Page 51: Mtu-M Front Panel

    MTU-M Front Panel What to Monitor The MTU-M allows you to monitor the health and status of an x TU-C/R pair from the MTU-M front panel. The MTU-M front panel consists of: Major, minor, and abnormal alarm LEDs Alarm Cut Off (ACO) push button and LED to shut off external alarms MTU-M POWER FAIL...

  • Page 52: Mtu-M Front Panel Leds

    MTU-M Front Panel MTU-M Front Panel LEDs The MTU-M front panel LEDs indicate the presence of system, network, and loop error conditions. If a Major or Abnormal alarm condition exists in the network or loop, the MAJOR and ABNML alarm LEDs light indicating there is an alarm condition.

  • Page 53: Mtu-M Alarms

    MTU-M Alarms Overview This chapter provides instructions on how to: Configure alarm parameters for the Hotwire 7900 MTU-M, and Display alarms. The MTU-M monitors and stores alarms. These alarms are then displayed automatically or manually from the MTU-M front panel or VT100-compatible MTU-M Front terminal.

  • Page 54: Accessing Mtu-M Alarm Functions

    MTU-M Alarms Accessing MTU-M Alarm Functions To access the MTU-M Alarms menu from the MTU-M Main Menu, type a at the MTU-M –> prompt and press Enter. The Alarms menu appears as follows: Menu path: Main Alarms MTU-M Alarms Menu Select Command: COMMAND DESCRIPTION...

  • Page 55: Alarm On/Off Options

    MTU-M Alarms Alarm On/Off Options The MTU-M allows you to prevent alarms from being displayed at the system terminal. Alarms can be suppressed from view at the system terminal by typing alarm off at any MTU-M prompt on the system terminal. The alarm off function only prevents alarms from being displayed at the system terminal.
  • Page 56 MTU-M Alarms Procedure 1. Type d at the Alarms –> prompt and press Enter. The Alarm Level Display menu appears as follows: Menu path: Main Alarms Display Alarms ->d Alarm Level Display Menu Select Command: COMMAND DESCRIPTION – Select all alarm levels Major –...
  • Page 57 MTU-M Alarms The following menu appears, allowing you to select an individual xTU-C id (2–80), system (MTU-M), or all alarms for display: Menu path: Main Alarms Display alarm level select alarm level –>major Select Command: COMMAND DESCRIPTION – enter ALL to select all xtu’s system –...

  • Page 58: Alarm Definitions

    MTU-M Alarms 4. Select the number of alarms to display and press Enter. The following is an example of the alarm display format: Menu path: Main Alarms Display alarm level (xtu id, system, all) (all, 0-255) I HTU C/R HSTATUS TASK Wed June 30 00:00:13 1997 Polling state change detected for HTU 3...

  • Page 59: Clearing Major Alarms

    MTU-M Alarms Clearing Major Alarms Major alarms can be cleared: Automatically when the xTU-C polling state changes from out of service (OOS) back to in service (INS). Automatically when the CO or CP carrier is restored. Manually by selecting the Clear option from the MTU-M Maintenance menu. Abnormal Alarms Abnormal alarms occur when an xTU-C is placed in maintenance out of service (MOS).

  • Page 60: Resetting The Mtu-M

    MTU-M Alarms Resetting the MTU-M The reset option allows you to reset the system (MTU-M) or a specific xTU-C/R pair. Procedure To reset the MTU-M: 1. At the MTU-M Main Menu screen MTU-M–> prompt, type r and press Enter. The select command menu appears and prompts you to enter an xTU id or system (to reset the MTU-M).

  • Page 61: Testing

    Testing Detecting a Problem The MTU-M can detect and report problem conditions and allow you to perform diagnostic testing of the xTU-C/R pair. The MTU-M offers a number of indicators to alert you to possible problems, as described in Chapter 7, MTU-M Front Panel.

  • Page 62: Accessing Loopback Functions

    Testing Accessing Loopback Functions To access loopback functions, type l (for local) at the MTU-M –> prompt and press Enter. The following menu appears allowing you to select local or remote loopback testing: Menu path: Main Loopback Select Command: COMMAND DESCRIPTION Local –...

  • Page 63: Running A Local Loopback

    Testing Running a Local Loopback Procedure To run a local loopback: 1. Type l (for local) at the Select local or remote –> prompt and press Enter. A screen appears and you are prompted to enter an xTU id. 2. Enter the number of the xTU-C you are performing loopback testing on and press Enter.

  • Page 64: Hdsl T1 Loopback Tests

    Testing HDSL T1 Loopback Tests Local Loopback Test When a local loopback is enabled, the red Loop Bk LED on the front panel of the initiating unit (CO or CP) lights up and remains lit until the loopback is disabled. Nest Diagnostic Diagnostic...

  • Page 65: Remote Loopback Test

    Testing Remote Loopback Test When a remote loopback is enabled, the red Loop Bk LED on the front panel of remote-end unit (CO or CP) lights up and remains lit until the loopback is disabled. The loopback LED on the initiating unit does not light. A message appears on the remote end unit reporting that it has been put into loopback.

  • Page 66: Hdsl E1 Loopback Tests

    Testing HDSL E1 Loopback Tests Local Loopback Test When a local loopback is enabled, the red Loop Bk LED on the front panel of the local unit lights up and remains lit until the loopback is disabled. Nest Diagnostic Diagnostic E1 HDSL Equipment Equipment...

  • Page 67: Remote Loopback Test

    Testing Remote Loopback Test When a remote loopback is enabled, the red Loop Bk LED on the front panel of the remote (far-end) unit lights up and remains lit until the loopback is disabled. The Loop Bk LED on the local (initiating) unit does not light. Nest Diagnostic Diagnostic...

  • Page 68: Sdsl E1 Loopback Tests

    Testing SDSL E1 Loopback Tests Local loopback Test When a local loopback is enabled, the red Loop Bk LED on the front panel of the local unit lights up and remains lit until the loopback is disabled. Nest Diagnostic Diagnostic E1 HDSL Equipment Equipment...

  • Page 69: Remote Loopback Test

    Testing Remote Loopback Test When a remote loopback is enabled, the red Loop Bk LED on the front panel of the remote (far-end) unit lights up and remains lit until the loopback is disabled. The Loop Bk LED on the local (initiating) unit does not light. Nest Diagnostic Diagnostic...

  • Page 70: Sdsl T1 Loopback Tests

    Testing SDSL T1 Loopback Tests Local loopback Test When a local loopback is enabled, the red Loop Bk LED on the front panel of the local unit lights up and remains lit until the loopback is disabled. Nest Diagnostic Diagnostic E1 HDSL Equipment Equipment...

  • Page 71: Remote Loopback Test

    Testing Remote Loopback Test When a remote loopback is enabled, the red Loop Bk LED on the front panel of the remote (far-end) unit lights up and remains lit until the loopback is disabled. The Loop Bk LED on the local (initiating) unit does not light. Nest Diagnostic Diagnostic...
  • Page 72 Testing This page intentionally left blank. 9-12 March 1998 7900-A2-GB20-00...

  • Page 73: Cable Pin Assignments

    Cable Pin Assignments Terminal Connection Cable Pin Assignments This section defines the pin assignments for the terminal cable from the front panel DB9 connector jack to your system terminal’s COM port. If your system terminal COM port requires a 9-pin D-shell connector, use the following pin assignments.
  • Page 74 Cable Pin Assignments If your system terminal COM port requires a 25-pin D-shell connector, use the following pin assignments. NOTE: You can build a custom cable using industry-standard cable accessories or connect a generic DB9-to-DB25 adapter to the terminal cable supplied with the HTU-M.

  • Page 75: Netconfig And Sysconfig Menu Values

    Netconfig and Sysconfig Menu Values Record your system (operational) configuration parameters. Field Default Value Current Value Polling Range 2-80 Polling interval Pollto 25/256th seconds Initial alarm on/off setting Initial menu on/off setting Console port baud rate 9600 Record your network management configuration parameters. Field Default Value Current Value...
  • Page 76 Netconfig and Sysconfig Menu Values This page intentionally left blank. March 1998 7900-A2-GB20-00...

  • Page 77: Snmp Traps

    SNMP Traps SNMP Traps This section describes the unit’s compliance with SNMP standards and any special operational features for the SNMP traps supported. The unit supports the following traps: warmStart linkUp linkDown warmStart SNMP Trap Description Possible Cause warmStart The unit has reinitialized Reset command.

  • Page 78: Linkup And Linkdown

    SNMP Traps 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. SNMP Trap Description Possible Cause linkUp The interface for the local...
  • Page 79 Associated with Pin 8 on an EIA-232 interface. Champ connector 64-pin connector used to connect the E1/T1 network or local loop to the HotWire 7900 Nest connectors J5, J6, and J7. Central Office/Central Site. The PSTN facility that houses one or more switches serving local telephone subscribers.
  • Page 80 Glossary A wideband digital interface operating at 2.048 Mbps, defined by ITU recommendations G.703 and G.704. It is used primarily outside North America. ETSI European Telecommunications Standardization Institute. An organization that produces technical standards in the area of telecommunications. Frame Alignment Signal. A loss of signal (LOS) error detection. Frame Alignment Word.
  • Page 81 Glossary SDSL Symmetrical Digital Subscriber Line. A technique for the use of an existing twisted pair line that permits high bandwidth, bidirectional transmission. SDSL Termination Unit. A generic reference to either an STU-C or STU-R module. STU-C SDSL Termination Unit – Central. The module at the CO (central office) or central site end of an HDSL connection.
  • Page 82 Glossary This page intentionally left blank. GL-4 March 1998 7900-A2-GB20-00...
  • Page 83 Index Abnormal Alarms, 8-7 linkUp and linkDown traps, C-2 Clearing Abnormal Alarms, 8-7 local loopback test, 9-6 Accessing the system for the first time, 3-1 loopback tests, 9-1 Alarm Definitions, 8-6 Accessing, 9-2 Abnormal Alarms, 8-7 Ending a loopback , 9-3 Major Alarms, 8-6 HDSL E1 Loopback, 9-6 Alarms, 8-1...
  • Page 84 Index related documents, vi system terminal interface, 4-1 remote loopback test, 9-5, 9-7, 9-9, 9-11 testing, 9-1 Resetting the MTU-M, 8-8 traps, SNMP, C-1 Resetting the xTU-C/R, 8-8 User interfaces, 1-3 service information, A Setup Instructions, 3-1 SNMP warmStart, C-1 linkUp and linkDown, C-2 warranty telephone number, A traps, C-1...

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