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Nortel Meridian 1 General Maintenance Information

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Meridian 1
General Maintenance Information
Document Number: 553-3001-500
Document Release: Standard 15.00
Date: January 2002
Year Publish FCC TM
Copyright © 1990–2002 Nortel Networks
All Rights Reserved
Printed in Canada
IInformation is subject to change without notice. Nortel Networks reserves the right to make changes in design
or components as progress in engineering and manufacturing may warrant. This equipment has been tested
and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules, and the
radio interference regulations of Industry Canada. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the
interference at their own expense.
SL-1 and Meridian 1 are trademarks of Nortel Networks.

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  • Page 1 All Rights Reserved Printed in Canada IInformation is subject to change without notice. Nortel Networks reserves the right to make changes in design or components as progress in engineering and manufacturing may warrant. This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules, and the radio interference regulations of Industry Canada.
  • Page 3 July 1995 Standard, release 10.00. This document is reissued to include information on Meridian 1 option 81C and text edits. Changes are noted by revision bars in the margins. December 1994 Standard, release 9.0. This document is reissued to include the information on Meridian 1 option 51C and other edits.
  • Page 4 Page 4 of 72 April 1994 Standard, release 8.0. This document is reissued to include the information on Meridian 1 option 61C. Changes to technical content are noted by revision bars in the margins. April 1993 Standard, release 6.0. Changes to technical content are noted by revision bars in the margins.

  • Page 5: Table Of Contents

    Page 5 of 72 Contents About this document ..... . . Precautions ....... Communicating with the system .
  • Page 6 Page 6 of 72 Contents 553-3001-500 Standard 15.00 January 2002...

  • Page 7: About This Document

    This document is a global document. Contact your system supplier or your Nortel Networks representative to verify that the hardware and software described is supported in your area. This document describes maintenance features for all Meridian 1 systems. The chapters in this document describe the following: •...
  • Page 8 Page 8 of 72 About this document References See the Meridian 1 Planning and Engineering Guide for the following: • Library Navigator (553-3001-000) • System Overview (553-3001-100) • Equipment Identification (553-3001-154) See the Meridian 1 installation and maintenance guide for the following: •...

  • Page 9: Precautions

    Data disks ..........Reference list The following are the references in this section: • X11 System Management (553-3001-300) Meridian 1 General Maintenance Information...
  • Page 10 Dispose of circuit cards according to the manufacturer’s instructions. WARNING To avoid damage to circuit cards from static discharge, wear a properly connected antistatic wrist strap when you work on Meridian 1 equipment. 553-3001-500 Standard 15.00...
  • Page 11 • Store cards in a dry, dust-free area. Figure 1 Static discharge points Module rear Wrist strap connection point Bare metal strip Power supply slot Module Wrist strap Bare metal strip front connection point Meridian 1 General Maintenance Information...
  • Page 12 Page 12 of 72 Precautions During repair and maintenance procedures, do the following: • Insert cards into compatible slots only. • Turn off the circuit breaker or switch for a module power supply before the power supply is removed or inserted. WARNING In AC-powered systems, capacitors in the power supply must discharge.
  • Page 13 If there is significant resistance when you try to insert a disk, remove the disk and check the position. For more detailed information on data disks, see X11 System Management (553-3001-300). Note: No maintenance or cleaning is required on the disk drives. Meridian 1 General Maintenance Information...
  • Page 14 Page 14 of 72 Precautions 553-3001-500 Standard 15.00 January 2002...

  • Page 15: Communicating With The System

    System Installation Procedures (553-3001-210) • Fault Clearing (553-3001-510) • Hardware Replacement (553-3001-520) You can exchange information with the system through system terminals and maintenance telephones. This chapter discusses these tools for communicating with the system. Meridian 1 General Maintenance Information...
  • Page 16 The Multi User Login feature, available with Release 19 and later, allows more than one device to interact with the Meridian 1. Refer to System Management Applications (553-3001-301) for details on using this feature.
  • Page 17 CPU test from LD 135 fails, the message displayed is “CCED200 CPU test failed Check the CP card.” See Administration (553-3001-311) for a description of all maintenance commands, and System Messages (553-3001-411) for the interpretation of all system messages. Meridian 1 General Maintenance Information...
  • Page 18 CAUTION If a Hayes command-set compatible (smart) modem is used at the Meridian 1 end, you must select the dumb mode of operation, Command Recognition OFF and Command Echo OFF, before connecting the modem to the SDI port. Refer to the modem instructions to set the mode of operation.
  • Page 19 Communicating with the system Page 19 of 72 Figure 2 Local and remote access to a system terminal Meridian 1 Local access system terminal Remote access system terminal modem modem telephone line 553-3000 The input/output ports on the CP card (CPSI ports) are used for access to the Core or Core/Network Module, which houses the card.
  • Page 20 81, which also applies to option 51C, 61C, and 81C. In this configuration, a switch box is normally set to the SDI port to remotely monitor general system operation. The CPSI ports can be accessed for debugging and patch downloading (through your Nortel Networks representative). Figure 3...
  • Page 21 Hayes V-series ULTRA Smartmodem 9600 • Motorola 28.8 Data/Fax modem • UDS FastTalk V.32/42b (available through Nortel Networks) • US Robotics Courier HST Dual Standard V.32bis A dispatch or call back modem, normally connected to the SDI port, can be used if it meets the requirements listed above.
  • Page 22 Page 22 of 72 Communicating with the system Maintenance telephone A telephone functions as a maintenance telephone when you define the class of service as maintenance set allowed (MTA) in the Multi-line Telephone Administration program (LD 11). A maintenance telephone allows you to send commands to the system through the following maintenance overlays: LD 30, LD 32, LD 33, LD 34, LD 35, LD 36, LD 37, LD 38, LD 41, LD 42, LD 43, LD 45, LD 46, LD 60, LD 61, and LD 62.
  • Page 23 (553-3001-510) or Hardware Replacement (553-3001-520) for the access procedure. Table 2 Translation from keyboard to dial pad Keyboard Dial pad Space or # Return Note: There is no equivalent for Q or Z on a dial pad. Meridian 1 General Maintenance Information...
  • Page 24 Page 24 of 72 Communicating with the system 553-3001-500 Standard 15.00 January 2002...

  • Page 25: Routine Maintenance

    Replace the battery pack every three years, even if no battery failures have occurred. For instructions on replacing the battery pack assembly, see Hardware Replacement (553-3001-520). Meridian 1 General Maintenance Information...
  • Page 26 Page 26 of 72 Routine maintenance DC-power battery systems External batteries, often used with DC-powered systems, generally require regular visual inspections. They may also require charger or rectifier tests and pilot cell tests. Perform all inspections and tests according to the supplier’s instructions.

  • Page 27: Hardware Maintenance Tools

    Temperature alarms ........Meridian 1...

  • Page 28: Reference List

    Page 28 of 72 Hardware maintenance tools Reference list The following are the references in this section: • X11 Administration (553-3001-311) • X11 System Messages (553-3001-411) There are fault indicators and hardware features that help you perform maintenance tasks (particularly identifying and clearing faults). These maintenance tools include the following: •...

  • Page 29: Enable/Disable Switch

    Note 2: In Options 61C, 81, and 81C, the red LEDs on the NT6D65 Core to Network Interface (CNI) Cards are lit when the associated Core is inactive. This is normal operation. Meridian 1 General Maintenance Information...
  • Page 30 Page 30 of 72 Hardware maintenance tools Figure 4 Sample enable/disable switch Enable/Disable switch 553-3003 553-3001-500 Standard 15.00 January 2002...

  • Page 31: Maintenance Display Code

    In Options 51C, 61C, 81, and 81C, the most recent 64 displays on a CP card stay in memory. You can review the displays on the active CP card through the Core Common Equipment Diagnostic (LD 135). Meridian 1 General Maintenance Information...
  • Page 32 Page 32 of 72 Hardware maintenance tools Figure 5 Sample LED indicator indicator 553-3004 553-3001-500 Standard 15.00 January 2002...
  • Page 33 NT1P62 Fibre Controller Controller Clock is tracking 51C, 61C, 71, NT7R52 Remote Carrier During normal operation, display shows 81, 81C, Interface Card self-test codes and port number on which Controller Clock is tracking Meridian 1 General Maintenance Information...
  • Page 34 Page 34 of 72 Hardware maintenance tools Figure 6 Sample maintenance display Two-digit maintenance display 553-3001 553-3001-500 Standard 15.00 January 2002...

  • Page 35: Cpu Controls

    CPU will remain inactive as long as the other CPU is set to Maint. For regular operation in dual CPU systems, set both normal/maintenance switches to Norm. For an Option 51C (a single CPU system), set the switch to Maint. Meridian 1 General Maintenance Information...
  • Page 36 Page 36 of 72 Hardware maintenance tools Figure 7 Norm/Maint switch on the Call Processor Card Manual initialize button MAN INT NORM Normal/maintenance switch MAINT 553-3005 553-3001-500 Standard 15.00 January 2002...

  • Page 37: Reload Button

    CAUTION During a sysload active calls are disconnected and the system goes into an emergency line transfer state. Use the reload button only if you are specifically instructed to do so in Nortel Networks Publications. Meridian 1 General Maintenance Information...
  • Page 38 Page 38 of 72 Hardware maintenance tools Figure 8 Reload button on the changeover and memory arbitrator card Reload button 553-3006 553-3001-500 Standard 15.00 January 2002...

  • Page 39: System Alarms

    When there is a major alarm, the red LED at the top of the affected column lights. A major alarm also activates a display on all attendant consoles. When a Meridian 1 is equipped with a power failure transfer unit, a major alarm causes designated 500/2500 telephones to connect directly to Central Office trunks;...

  • Page 40: Minor Alarms

    When a major alarm occurs, the Meridian 1 provides relay contact closure across two remote alarm lines, REMALMA and REMALMB. These lines are extended to the main distribution frame (MDF) through the system monitor to MDF cable for customer use.

  • Page 41: System Monitor Indicators

    The master system monitor checks the CPU column and periodically polls the slaves to check their status. When polled, the slaves report their status to the master. If a slave does not respond when it is polled, the master reports the address as a faulty slave. Meridian 1 General Maintenance Information...
  • Page 42 Page 42 of 72 Hardware maintenance tools If a slave is removed, the master cannot communicate with higher addresses. Therefore, the master considers the removed slave and all slaves with a higher address as disabled. For example, if slave 2 is disabled, the master also reports slaves 3, 4, and up as disabled.

  • Page 43: Line Transfer

    Line transfer As an option, you can connect one or more power failure transfer units (PFTUs) to the Meridian 1. Each PFTU connects up to eight designated analog (500/2500 type) telephones to Central Office trunks. If call processing stops, those analog (500/2500 type) telephones are transferred through the PFTU to the Central Office so that you still have outside connections.
  • Page 44 Page 44 of 72 Hardware maintenance tools Figure 10 PFTU configurations PFTU PFTU PFTU PFTU All columns to one PFTU One column to one PFTU PFTU PFTU PFTU PFTU PFTU PFTU PFTU One column to one PFTU PFTU with additional PFTUs attached 553-3035 and multiple columns to one PFTU 553-3001-500...

  • Page 45: Main Power Loss

    The system monitor then generates system messages that indicate the status of main and reserve power supplies. You can connect a reserve (back-up) power supply to the Meridian 1: either an uninterruptible power supply (UPS) for AC-powered systems or reserve batteries for DC-powered systems.

  • Page 46: Temperature Alarms

    Page 46 of 72 Hardware maintenance tools To help you pinpoint a power supply problem, the master NT8D22 System Monitor identifies the following: • the column with the fault (system monitor 0–63) • the module (0–3) in that column • the power supply unit (1–2) in the module Figure 11 shows the power equipment designations in a column.
  • Page 47 Module 3 Power unit 1 Module 2 Power unit 1 Power unit 2 Module 1 Power unit 1 Module 0 Power unit 1 Column 0 System monitor 0 Front of the column, covers removed 553-3014 Meridian 1 General Maintenance Information...
  • Page 48 Page 48 of 72 Hardware maintenance tools 553-3001-500 Standard 15.00 January 2002...

  • Page 49: Software Maintenance Tools

    Manual continuity tests ........Reference list The following are the references in this section: • X11 Administration (553-3001-311) • X11 System Messages (553-3001-411) • X11 Features and Services (553-3001-306) Meridian 1 General Maintenance Information...

  • Page 50: Diagnostic Programs

    Page 50 of 72 Software maintenance tools Diagnostic programs Diagnostic software programs monitor system operations, detect faults, and clear faults. Some programs run continuously; some are scheduled. Diagnostic programs are resident or non-resident. Resident programs, such as the Error Monitor and Resident Trunk Diagnostic, are always present in system memory.

  • Page 51: Midnight And Background Routines

    (for example, if you log on to check the status of a circuit card). You may include the programs listed in Table 6 in Midnight and Background Routines. Your maintenance requirements and the configuration of your system determine the programs you include in Midnight and Background Routines. Meridian 1 General Maintenance Information...
  • Page 52 Page 52 of 72 Software maintenance tools Note: Software Audit (LD 44) should always be used in the Background Routine. Table 6 Programs used in Midnight and Background Routines Program number Program function LD 30 Network and Signaling Diagnostic LD 32 (Midnight only) Network and Peripheral Equipment Replacement LD 33 1.5 Mbyte Remote Peripheral Equipment...

  • Page 53: Overlay Loader

    After all required programs and data have been loaded and all checks performed, the System Loader is erased from system memory, the Initialize Program runs, and normal call processing begins. This process is called a sysload or system reload. Meridian 1 General Maintenance Information...

  • Page 54: Options 51C, 61C, 81, And 81C Features

    During a sysload active calls are not disconnected and the system goes into an emergency line transfer state. Activate the System Loader only if you are specifically instructed to do so in Nortel Networks Publications. To minimize sysload time, you can enable the Short Memory Test capability in LD 17 (prompt SMEM).
  • Page 55 You can access the core complex in each Core Module or Core/Network Module through the I/O ports on the CP cards. Meridian 1 General Maintenance Information...

  • Page 56: The History File Feature

    Page 56 of 72 Software maintenance tools The History File feature If you have a printer connected to the system, each system message is printed as it is received. If you do not have a printer connected, you can use the History File to store a limited number of system messages in protected memory.

  • Page 57: Interactive Diagnostics

    The Enhanced Maintenance feature System software sometimes requires modifications, called patches, provided by Nortel Networks Technical Assistance Centers. The command ISS in Print Routine 3 (LD 22) prints the software generic and issue. A plus sign (+) by the issue number means a patch is in service.

  • Page 58: Manual Continuity Tests

    Page 58 of 72 Software maintenance tools Manual continuity tests You can perform manual continuity tests on superloop network cards, intelligent peripheral equipment, and Basic Rate Interface (BRI) equipment. A continuity test generates a signaling pattern at one point, monitors its progress, and checks for its detection at an end point.
  • Page 59 Controller card to Controller Network superloop network card TEST 3 Superloop network card Network A Network B to superloop network card TEST 4 Controller card to Controller Controller Network controller card Controller Network Network Controller 553-3008 Meridian 1 General Maintenance Information...
  • Page 60 Page 60 of 72 Software maintenance tools Figure 13 Manual continuity tests: loopback configurations Pattern generator and pattern detector Loopback point TEST 5 Network Superloop network card Network backplane through backplane TEST 6 Superloop network card Network Controller through controller card TEST 7 Controller card through Special...

  • Page 61: User Reports

    To classify the fault in these cases, check for system messages and visual fault indications. You may also need to have the user reproduce the problem so you can determine the sequence of events that led to the fault. Meridian 1 General Maintenance Information...
  • Page 62 Page 62 of 72 User reports Table 7 on page 62 lists problems users typically report. Table 7 User report indications User report Type of fault Major alarm reported by attendant Power No ring on 500/2500 telephones Major alarm reported by attendant Common equipment Minor alarm reported by attendant Network equipment...

  • Page 63: Technical Assistance Service

    Page 63 of 72 Technical assistance service Customer Technical Support (CTS) mission is to resolve Nortel Networks Product defects. CTS will provide technical assistance for systems experiencing problems, even if it has been determined that the problem is not a product defect. However, CTS will charge the distributor for the support of non-defect related problems as described in this document.
  • Page 64 Except as excluded by the provisions of warranty or other agreements with Nortel Networks, a fee for technical assistance may be charged, at rates established by Nortel Networks. Information on rates and conditions for services are available through Nortel Networks representatives.
  • Page 65 • Tape or disk drive failure • Potential system degradation or outage • Loss of critical trunk group • Slow dial tone (8 seconds or more) • Customer declares critical functionality - see Raised Priority in this section Meridian 1 General Maintenance Information...
  • Page 66 For non-product defect problems, such as a customer manageable problem or a problem that could be resolved at the distributor level, CTS may charge for the service provided. Charges for these Services may be found in the Nortel Product Catalog/Price Manual under Technical Support.
  • Page 67 Page 67 of 72 Index Numerics 500/2500 telephones call processing major alarms and, 39 Initialize Program effect on, 50 PFTU connection to CO trunks, 43 sysload effect on, 37 system initialization effect on, 35 cards, circuit enable/disable switch, 29 access, local/remote excessive error messages from, 53 described, 18 handling, 11...
  • Page 68 Page 68 of 72 CPU (central processing unit) accessing, 16 faults downloading firmware from, 51 indicated by user reports, 62 line transfer on failure of, 43 maintenance display indications, 33 CPU controls, 35 major alarms, 39 minor alarms, 40 NT8D22 System Monitor, 41, 42 data disks technical assistance classifications, 64 precautions, 12...
  • Page 69 Page 69 of 72 LD 137 (Core Input/Output Diagnostic), 17 minor alarms LED (light emitting diode) defined, 39 described, 29 faults causing, 40 indications, 31 mnemonics, 17 location, 32 modems module power supply failures, 45 option 61C/81 temperature alarms, 46 compatibility specifications, 21 line transfer guidelines, 18...
  • Page 70 Page 70 of 72 pedestal air filters replacing blocked, 46 battery pack, 25 servicing, 25 circuit cards PFTU (power failure transfer unit) enable/disable switch, 29 500/2500 telephones and, 43 precautions, 11 configuring with columns, 43, 44 reports, user, 61 major alarms, 39 resident diagnostic software programs, 50 point-to-point continuity tests Resident Trunk Diagnostic program, 53...
  • Page 71 Page 71 of 72 system messages format, 16 History File storage of, 56 module power supply failures, 45 NT8D22 System Monitor, 42 Overload Monitor and, 53 temperature alarms, 46 system, communicating with, 15, 16 technical assistance service classifications, 64 overview, 63 temperature, high column alarms generated by, 46 temperatures, high column...
  • Page 72 Page 72 of 72 553-3001-500 Standard 15.00 January 2002...
  • Page 74 Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at their own expense. SL-1 and Meridian 1 are trademarks of Nortel Networks. Publication number: 553-3001-500 Document release: Standard 15.00...

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