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Northern Telecom DMS-100 Series Maintenance Manual

Line drawer
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297-2101-504
DMS-100 Family
PCM30 Line Drawer
Maintenance Guide
BCS33 and up
Standard 02.01
December 1991

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Summary of Contents for Northern Telecom DMS-100 Series

  • Page 1 297-2101-504 DMS-100 Family PCM30 Line Drawer Maintenance Guide BCS33 and up Standard 02.01 December 1991...
  • Page 3 All rights reserved. Printed in Canada and printed in the United States of America. Information is subject to change without notice. Northern Telecom reserves the right to make changes in design or components as progress in engineering and manufacturing may warrant.
  • Page 4 Publication history December 1991 BCS33 Standard 02.01 incorporate dual-tone multifrequency (DTMF) outpulsing January 1991 BCS31 Standard 01.02 first release of this document 297-2101-504 Standard 02.01 December 1991...

  • Page 5: Table Of Contents

    Contents About this document When to use this document v How to identify the software in your office v How PCM30 Line Drawer documentation is organized vi References in this document vi What precautionary messages mean vii How commands, parameters, and responses are represented viii Understanding the PCM30 line drawer Application of the PCM30 line drawer 1-2 Example of a PCM30 line drawer application 1-2...
  • Page 6 iv Contents List of figures Figure 1-1 Provision of exchange lines from a host LCM 1-3 Figure 1-2 Provision of exchange lines from a PRLCM 1-4 Figure 1-3 PLD and DMS configuration 1-5 Figure 1-4 PCM30 line drawer 1-7 Figure 1-5 LCA shelf layout 1-9 Figure 1-6 LCE frame layout 1-11...

  • Page 7: About This Document

    When to use this document Northern Telecom (NT) software releases are referred to as batch change supplements (BCS) and are identified by a number, for example, BCS29. This document is written for DMS-100 Family offices that have software loads of BCS33 and up.

  • Page 8: How Pcm30 Line Drawer Documentation Is Organized

    How PCM30 Line Drawer documentation is organized This document is part of PCM30 Line Drawer (PLD) documentation that supports the Northern Telecom line of PLD products. PLD documentation is a subset of the DMS-100 Family library. PCM30 Line Drawer documentation consists of the following documents.

  • Page 9: What Precautionary Messages Mean

    About this document vii What precautionary messages mean Danger, warning, and caution messages in this document indicate potential risks. These messages and their meanings are listed in the following chart. Message Significance DANGER Possibility of personal injury WARNING Possibility of equipment damage CAUTION Possibility of service interruption or degradation Examples of the precautionary messages follow.

  • Page 10: How Commands, Parameters, And Responses Are Represented

    viii About this document How commands, parameters, and responses are represented Commands, parameters, and responses in this document conform to the following conventions. Input prompt (>) An input prompt (>) indicates that the information that follows it is a command: >BSY Commands and fixed parameters Commands and fixed parameters that are entered at a MAP are shown in...

  • Page 11: Understanding The Pcm30 Line Drawer

    Understanding the PCM30 line drawer This chapter introduces the PCM30 line drawer (PLD). The PLD is discussed in subsequent sections of this chapter as follows: Application of the PCM30 line drawer on page 1-2 describes the PLD and provides an example of its application. System configuration on page 1-5 describes where the PLD fits into the DMS peripheral architecture.

  • Page 12: Application Of The Pcm30 Line Drawer

    1-2 Understanding the PCM30 line drawer Application of the PCM30 line drawer The PCM30 line drawer (PLD) is a unit that fits in a line concentrating module (LCM) at a host site or in a PCM30 remote line concentrating module (PRLCM) at a remote site. The PLD interfaces with customer terminating equipment (CTE) at customer sites.
  • Page 13 Understanding the PCM30 line drawer 1-3 Figure 1-1xxx Provision of exchange lines from a host LCM Analog exchange lines Loop calling PCM30 link (2Mbps) DMS-100 Loop calling Disconnect clear Earth calling (Type 1 MEL) DC5A calling Host LCM PLGC with PCM30 line drawer DC5A calling PCM30 Line Drawer Maintenance Guide BCS33 and up...
  • Page 14 1-4 Understanding the PCM30 line drawer Figure 1-2xxx Provision of exchange lines from a PRLCM Analog exchange lines Loop calling PCM30 link Fiber (2Mbps) links DMS-100 Loop calling Disconnect clear Earth calling (Type 1 MEL) DC5A calling PLGC PRLCM with PCM30 line drawer DC5A calling 297-2101-504 Standard 02.01 December 1991...

  • Page 15: System Configuration

    Understanding the PCM30 line drawer 1-5 System configuration The PLD fits into the DMS-100 peripheral architecture in the same way as the standard line drawer. The PLD is an integral part of the host LCM or the PRLCM and provides two PCM30 links, each link carrying a maximum of 30 digital exchange lines to the customer terminating equipment.

  • Page 16: How The Pcm30 Line Drawer Is Configured

    1-6 Understanding the PCM30 line drawer How the PCM30 line drawer is configured Figure 1-4 illustrates the physical configuration of the PLD. The PLD is physically similar to the standard line drawer and includes the following components: • bus interface card •...
  • Page 17 Understanding the PCM30 line drawer 1-7 Figure 1-4xxx PCM30 line drawer Drawer front flexible Bus interface cables card (BIC) PCM30 interface card (PIC) PCM30 Line Drawer Maintenance Guide BCS33 and up...

  • Page 18: How The Peripheral Modules Are Configured

    1-8 Understanding the PCM30 line drawer How the peripheral modules are configured The PLD resides either in an LCM at the host site, or in a PRLCM at a remote site. A brief description of each module is provided in the following pages.
  • Page 19 Understanding the PCM30 line drawer 1-9 Figure 1-5xxx LCA shelf layout Line drawers Digroup control card LCM processor card Power converter PCM30 Line Drawer Maintenance Guide BCS33 and up...
  • Page 20 1-10 Understanding the PCM30 line drawer Two host LCMs, each one supporting a maximum of ten PLDs, are housed in a standard DMS-100 single-bay frame that is referred to as a line concentrating equipment frame. A maximum of 20 PLDs are assigned in one line concentrating equipment frame, as shown in Figure 1-6.
  • Page 21 Understanding the PCM30 line drawer 1-11 Figure 1-6xxx LCE frame layout RG-0 RG-1 Baffle and fuse panel LCA-1 Baffle and fuse panel LCM-1 LCA-0 Baffle and fuse panel LCA-1 LCM-0 Baffle and fuse panel LCA-0 Baffle PCM30 Line Drawer Maintenance Guide BCS33 and up...
  • Page 22 1-12 Understanding the PCM30 line drawer The PRLCM is a remote LCM. Similar to the host LCM, the PRLCM provides low-level functions, for example, line scanning and ringing. It is located at a remote site and connects to the PLGC through PCM30 links. Figure 1-7 illustrates the physical configuration of the PRLCM, which consists of the following components: •...

  • Page 23: Pcm30 Line Drawer Maintenance

    PCM30 line drawer maintenance This chapter describes the maintenance functions available for the PCM30 line drawer (PLD) as follows: PCM30 line drawer maintenance description on page 2-2 describes the maintenance functions available for the PLD. Fault detection and isolation on page 2-3 describes how faults are detected and isolated.

  • Page 24: Pcm30 Line Drawer Maintenance Description

    2-2 PCM30 line drawer maintenance PCM30 line drawer maintenance description The existing standard line drawer (SLD) maintenance has been extended to support the maintenance of the PCM30 line drawer (PLD), specifically the PCM30 interface card (PIC), which is an integral part of the PLD. Maintenance is performed by the line concentrating module (LCM) drawer maintenance, which is part of the LCM maintenance, and includes maintenance of the PIC.

  • Page 25: Fault Detection And Isolation

    PCM30 line drawer maintenance 2-3 Fault detection and isolation Fault detection on the PLD is accomplished through continuous self-monitoring of the system, routine audits, and both automatic and manual diagnostic procedures. Fault isolation can be performed to circuit card level, that is, the fault can be identified as either a BIC or a PIC failure. If a hardware or link fault occurs on the PLD, the fault status code LCM is displayed below the peripheral module (PM) subsystem.

  • Page 26: Performing Maintenance Functions

    2-4 PCM30 line drawer maintenance Performing maintenance functions Maintenance functions are performed at the MAP (maintenance and administration position) terminal located at either the host or the remote site. Drawer maintenance Maintenance functions on the PLD are performed at the MAP terminal under the PM subsystem at the LCM level, and these functions are similar to the functions performed on the SLD.

  • Page 27: Clearing Drawer Faults

    Clearing drawer faults This chapter describes the procedure for clearing PCM30 line drawer (PLD) faults. If a card replacement is required, refer to the “Card replacement procedures” chapter of this document. The procedure in this chapter begins at the peripheral module (PM) level of the MAP terminal.

  • Page 29: Pm Lcm

    Alarm clearing procedures 3-3 Alarm clearing procedures 3-3 PM LCM PM LCM (continued) Minor Minor Trks APPL 1LCM Indication The alarm code LCM, below the peripheral module (PM) subsystem header, indicates a line concentrating module minor alarm. The number that precedes LCM is the number of LCMs with a minor alarm.
  • Page 30 3-4 Alarm clearing procedures PM LCM (continued) Minor (continued) Summary of clearing an LCM alarm Post ISTb LCM Determine drawer status Busy the drawer Is drawer system busy (S)? Test the drawer Is drawer manual busy (M)? Replace card Did test pass? Return the drawer to service...
  • Page 31 Alarm clearing procedures 3-5 PM LCM (continued) Minor (continued) Clearing a PM LCM Minor alarm Step Action At the MAP Access the PM level of the MAP by typing >PM and pressing the Enter key. ↵ Display all the in-service-trouble LCMs by typing >DISP ISTB LCM and pressing the Enter key.
  • Page 32 3-6 Alarm clearing procedures PM LCM (continued) Minor (continued) Clearing a PM LCM Minor alarm (continued) Step Action Busy the drawer by typing >BSY DRWR drwr_no and pressing the Enter key. ↵ where drwr_no is the number of the LSG to be busied (0 to 19) Test the drawer by typing >TST DRWR drwr_no and pressing the Enter key.
  • Page 33 Alarm clearing procedures 3-7 PM LCM (continued) Minor (continued) Clearing a PM LCM Minor alarm (continued) Step Action Return the drawer to service by typing >RTS DRWR drwr_no and pressing the Enter key. ↵ where drwr_no is the number of the LSG to be returned to service (0 to 19) If the RTS command passed and the drawer is in...
  • Page 34 3-8 Alarm clearing procedures 3-8 Alarm clearing procedures 3-8 Alarm clearing procedures Alarm clearing procedures 3-8 Alarm clearing procedures 3-8 PM LCM PM LCM PM LCM PM LCM PM LCM (end) (continued) (continued) (end) (continued) Minor Minor Minor Minor Minor (continued) (end) (end)

  • Page 35: Card Replacement Procedures

    Card replacement procedures This chapter provides procedures for replacing cards in a PCM30 line drawer (PLD). The procedures in this chapter assume that you are at the PM level (peripheral module level) of the MAP terminal. If you are not at this level, get to the PM level from the CI level (command interpreter level) of the MAP terminal by typing >MAPCI;MTC;PM...

  • Page 37: Nt6X27Ca

    Card replacement procedures 4-3 NT6X27 in a PCM30 line drawer Application Use this procedure to replace the PCM30 interface card (PIC) in a PCM30 line drawer (PLD). Suffixes Name NT6X27 PCM30 interface card Common procedures None Action The following flowchart is a summary of this procedure. Use the instructions in the step-action table that follows the flowchart to perform the procedure.
  • Page 38 4-4 Card replacement procedures NT6X27 (continued) in a PCM30 line drawer (continued) Summary of replacing an NT6X27 in a PCM30 line drawer Referred from alarm procedure Obtain a replacement card Replace the faulty card Return to alarm procedure 297-2101-504 Standard 02.01 December 1991...
  • Page 39 Card replacement procedures 4-5 NT6X27 (continued) in a PCM30 line drawer (continued) Replacing an NT6X27 in a PCM30 line drawer Step Action CAUTION Loss of service Service to the lines connected to the PIC that is being replaced is interrupted. Perform this procedure during a period of low traffic.
  • Page 40 4-6 Card replacement procedures Card replacement procedures 4-6 NT6X27 NT6X27 (end) (continued) in a PCM30 line drawer in a PCM30 line drawer (continued) (end) Replacing an NT6X27 in a PCM30 line drawer (continued) Step Action At the shelf WARNING Static electricity damage Wear a wrist strap connected to the wrist strap grounding point of a frame supervisory panel (FSP) while handling circuit cards.

  • Page 41: Nt6X54Ca

    Card replacement procedures 4-7 NT6X54 in a PCM30 line drawer Application Use this procedure to replace the bus interface card (PIC) in a PCM30 line drawer (PLD). Suffixes Name NT6X54 bus interface card Common procedures None Action The following flowchart is a summary of this procedure. Use the instructions in the step-action table that follows the flowchart to perform the procedure.
  • Page 42 4-8 Card replacement procedures NT6X54 (continued) in a PCM30 line drawer (continued) Summary of replacing an NT6X54 in a PCM30 line drawer Referred from alarm procedure Obtain a replacement card Replace the faulty card Return to alarm procedure 297-2101-504 Standard 02.01 December 1991...
  • Page 43 Card replacement procedures 4-9 NT6X54 (continued) in a PCM30 line drawer (continued) Replacing an NT6X54 in a PCM30 line drawer Step Action CAUTION Loss of service Service to the lines connected to the PIC that is being replaced is interrupted. Perform this procedure during a period of low traffic.
  • Page 44 4-10 Card replacement procedures Card replacement procedures 4-10 NT6X54 NT6X54 (end) (continued) in a PCM30 line drawer in a PCM30 line drawer (continued) (end) Replacing an NT6X54 in a PCM30 line drawer (continued) Step Action Close the line drawer. Return to the maintenance procedure that sent you to this procedure and continue as directed.
  • Page 45 List of terms Automatic call distribution (ACD) A set of Meridian digital centrex features that assigns answering machine priorities to incoming calls and then queues and distributes them to a predetermined group of telephone sets designated as answering positions. Bus interface card (BIC) The BIC is a circuit card located in the PCM30 line drawer.

  • Page 46: 5-2 List Of Terms

    5-2 List of terms DS30A link A 32-channel transmission link between the line concentrating module and the controllers, for example, a PCM30 line group controller, in the DMS-100 Family. Dual-tone multifrequency (DTMF) signaling DTMF is a signaling method that employs set combinations of two specific voice-band frequencies.
  • Page 47 List of terms 5-3 Line group controller (LGC) An LGC is a peripheral module that supports the line concentrating module. It performs high-level functions, for example, call coordination and provision of the different tones that are required. The LGC interfaces with the network through DS30 links and with a line concentrating module through DS30A links.
  • Page 48 5-4 List of terms PCM30 line drawer (PLD) The PLD is an integral part of the host or remote line concentrating module, which interfaces with multiplexers at customer sites. The interface consists of two PCM30 links, and each link is capable of carrying a maximum of 30 digital exchange lines.
  • Page 50 DMS-100 Family PCM30 Line Drawer Maintenance Guide © 1991 Northern Telecom All rights reserved. Information is subject to change without notice. Northern Telecom reserves the right to make changes in design or components as progress in engineering and manufacturing may warrant.

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