Nortel Meridian Meridian 1 Operating and safety instructions

Hardware replacement
Meridian 1
Hardware replacement
Document Number: 553-3001-520
Document Release: Standard 16.00
Date: April 2000
Year Publish FCC TM
Copyright © 1990– 2000 Nortel Networks
All Rights Reserved
Printed in Canada
Information 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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Hardware replacement
Revision history
April 2000 Standard 16.00. This is a global document and is up-issued for X11 Release
25.0x.
November 1999 Standard, release 15.00. This document is reissued to include information on
the NTRB33 Fiber Junctor Interface (FIJI) and NTRB34 Core Network
Interface 3 (CNI-3) cards.
June 1999 Standard, release 14.00. This document is reissued for X11 release 24.
October 1997 Standard, release 13.00. This document is reissued to include information on
the NT5D10 Call Processor Card, the NT5D61 Input/Output Disk Unit with
CD-ROM (IODU/C), and the NT5D30 Dual Intergroup Switch (DIGS) card.
Changes are noted by revision bars in the margins.
August 1996 Standard, release 12.00. This document is reissued to include Call Processor
(CP) card memory requirements for Release 22 and other technical
information.
December 1995 Standard, release 11.00. This document is reissued to include information on
the NT9D19 Call Processor Card and the circuit card replacement procedure
for replacing an IOP and a CMDU with an IOP/CMDU.
July 1995 Standard, release 10.00. This document is reissued to include international
information to create a global Nortel Networks technical publication (NTP),

Page 4 of 362
553-3001-520 Standard 16.00 April 2000
Meridian 1Option81C,and minortext edits.Changesto technical content are
noted by revision bars in the margins.
December 1994 Standard, release 9.0. Reissued for technical content.
December 1994 Standard, release 8.0. This document is reissued to include updated
information on the Small Systems Multi Disk Unit (SMDU), Meridian 1
Option 51C, and edits. Changes to technical content are noted by revision
bars in the margins.
April 1994 Standard, release 7.0. Reissued to include the information for Meridian 1
Option 61C. Changes to technical content are noted by revision bars in the
margins.
August 1993 Standard, release 6.0. Changes to technical content are noted by revision bars
in the margins.
April 1993 Standard, release 5.0. New information and changes to technical content are
noted by revision bars in the margins.
December 1992 Standard, release 4.0. New information and changes to technical content are
noted by revision bars in the margins.
December 1991 Standard, release 3.0. This document is reissued to include technical content
updates. Due to the extent of the changes, revision bars are omitted.
July 1990 Standard, release 2.0.
January 1990 Standard, release 1.0.

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Hardware replacement
10
Contents
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Content list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Reference list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Access through the system terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Access through the maintenance telephone . . . . . . . . . . . . . . . . . . . . . 15
Content list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Power equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Circuit cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Data disks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Options 51C, 61C,and 81C cable guidelines . . . . . . . . . . . . . . . . . . . . 22
Content list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Reference list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Removing module covers and pedestal grills . . . . . . . . . . . . . . . . . . . . 29
Module covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Pedestal grills . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Removing UK air exhaust/intake grills . . . . . . . . . . . . . . . . . . . . . . 31
A0321130 Fan Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A0378252 Battery Pack Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
NTAG26 Extended Multi-frequency receiver . . . . . . . . . . . . . . . . . 38
NT5K09 Quad Digitone Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
NT5K10 Dual Loop Peripheral Buffer Card . . . . . . . . . . . . . . . . . . . . 41
NT5K1106 Enhanced Peripheral Equipment Card Cage . . . . . . . . . . . 43

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553-3001-520 Standard 16.00 April 2000
Extended Multi - Frequency NT5K21AA Compelled
Sender/Receiver Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
NT1P61 Fibre Superloop Network Card . . . . . . . . . . . . . . . . . . . . . . . 49
NT1P62 Fibre Peripheral Controller Card . . . . . . . . . . . . . . . . . . . . . . 51
NT5D10 68060 Call Processor (CP) Card . . . . . . . . . . . . . . . . . . . . . . 53
NT5D12AA Dual DTI/PRI (DDP) . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Removing the DDP card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Installing the DDP card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
NT5D20 IOP/CMDU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Replacing the NT6D63 IOP and the NT6D64 CMDU
with the NT5D20 IOP/CMDU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
NT5D30AA Dual InterGroup Switch (DIGS) card . . . . . . . . . . . . . . . 84
NT6D3903 CPU/Network Module Card Cage . . . . . . . . . . . . . . . . . . 87
NT6D40, NT6D41, NT6D42, Power Supply DC . . . . . . . . . . . . . . . . 92
NT5D61 Input/Output Disk Unit with CD-ROM (IODU/C) . . . . . . . 93
Performing a data dump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Splitting the Cores . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Replacing the IODU/C in a redundant system . . . . . . . . . . . . . . . . 95
Replacing the IODU/C in an Option 51C . . . . . . . . . . . . . . . . . . . . 101
Completing the upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
NT6D52 Rectifier –48 V/30 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
NT5D2103
Core/Network Card Cage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
NT6D6003 Core Bus Terminator Card . . . . . . . . . . . . . . . . . . . . . . . . 129
NT6D63 I/O Processor Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
NT6D64 Core Multi Drive Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
NT6D65 and NTRB34 Core to Network Interface Cards . . . . . . . . . . 138
NT6D66 Call Processor Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
NT7D10 Power Distribution Unit DC . . . . . . . . . . . . . . . . . . . . . . . . . 146
NT8D06, NT8D21, NT8D29 Power Supply AC . . . . . . . . . . . . . . . . 151
NT7D15 System Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
NT7D67CB Power Distribution Unit DC . . . . . . . . . . . . . . . . . . . . . . 154

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Hardware replacement
NT7R51 Local Carrier Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . 161
NT7R52 Remote Carrier Interface Card . . . . . . . . . . . . . . . . . . . . . . . 162
NT8D01 Controller Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
NT8D02, NT8D03, NT8D09, NT8D14, NT8D15, NT8D16
Intelligent Peripheral Equipment Card . . . . . . . . . . . . . . . . . . . . . . . . . 166
NT8D04 Superloop Network Card, QPC414 Network Card . . . . . . . . 169
NT8D17 Conference/TDS Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
NT8D18 Network/DTR Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
NT8D19 Memory/Peripheral Signaling Card . . . . . . . . . . . . . . . . . . . 174
NT8D22 System Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
NT8D41 Dual or Quad Port Serial Data Interface card . . . . . . . . . . . . 178
NT8D46AC Thermostat Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
NT8D46AM, NT8D46DC Air Probe Harness . . . . . . . . . . . . . . . . . . . 186
NT8D52AB, NT8D52DD Pedestal Blower Unit . . . . . . . . . . . . . . . . . 190
NT8D53CA Power Distribution Unit AC . . . . . . . . . . . . . . . . . . . . . . 192
NT8D53AD Power Distribution Unit . . . . . . . . . . . . . . . . . . . . . . . . . 195
NT8D56AA, NT8D56AC, NT8D57 Module
Power Distribution Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
NT8D1103 CE/PE Module Card Cage . . . . . . . . . . . . . . . . . . . . . . . . 199
NT8D1303 PE Module Card Cage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
NT8D3403 CPU Module Card Cage . . . . . . . . . . . . . . . . . . . . . . . . . . 205
NT8D3503/NT8D3507 Network Module Card Cage . . . . . . . . . . . . . 209
NT8D3703 IPE Module Card Cage . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
NT8D33 Small Systems Multi Disk Unit . . . . . . . . . . . . . . . . . . . . . . 218
Replacing NT9D19 68040 Call Processor (CP) Cards in
systems equipped with NT5D61 IODU/C cards . . . . . . . . . . . . . . . . . 220
NT9D19 68040 Call Processor (CP) card . . . . . . . . . . . . . . . . . . . . . . 225
NT9D34 Enhanced Mass Storage Interface Card . . . . . . . . . . . . . . . . 230
NTBK51AA Downloadable D-Channel Daughterboard . . . . . . . . . . . 233
Removing the DDCH Daughterboard . . . . . . . . . . . . . . . . . . . . . . . 233
Installing the DDCH Daughterboard . . . . . . . . . . . . . . . . . . . . . . . . 233

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553-3001-520 Standard 16.00 April 2000
NTND01 Integrated CPU/Memory Card . . . . . . . . . . . . . . . . . . . . . . . 236
NTND02 Misc/SDI/Peripheral Signaling Card . . . . . . . . . . . . . . . . . . 237
NTND08, QPC939 ROM Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
NTND09, QPC583 Memory Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
NTND10, QPC581 Changeover and Memory Arbitrator Card . . . . . . 243
NTND15, NT8D68 Floppy Disk Unit . . . . . . . . . . . . . . . . . . . . . . . . . 246
NTND16, NT8D69 Multi Disk Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 247
NTND31 ROM Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
NTRB33 Fiber Junctor Interface card . . . . . . . . . . . . . . . . . . . . . . . . . 250
P0699798 Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
QMM42 Security Data Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
QPC43 Peripheral Signaling Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
QPC215 Segmented Bus Extender Card . . . . . . . . . . . . . . . . . . . . . . . 258
QPC412 InterGroup Switch Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
QPC441 Three-Port Extender Card . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
QPC471, QPC775 Clock Controller Card . . . . . . . . . . . . . . . . . . . . . . 267
QPC477 Bus Terminating Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
QPC841 Serial Data Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
QPC579 CPU Function Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
QPC580 CPU Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
QPC584 Mass Storage Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . 277
QPC659 Dual Loop Peripheral Buffer Card . . . . . . . . . . . . . . . . . . . . 279
QPC687 CPU Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
Replacing the QPC723A Circuit Card . . . . . . . . . . . . . . . . . . . . . . . . . 283
QPC742 Floppy Disk Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . . 285
QPC940 ROM Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Replacing the Security Device on the NT5D61 IODU/C . . . . . . . . . . 289
Replacing the Security Device on a redundant system . . . . . . . . . . 290
Replacing the Security Device on an Option 51C system . . . . . . . 292

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Replacing NT5D20 IOP/CMDU cards or NT6D63 IOP and
NT6D64 CMDU cards with NT5D61 IODU/C cards . . . . . . . . . . . . . 298
Replacement procedures for redundant systems
(Options 61C, 81, 81C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
Splitting the cores . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Replacement procedure for Option 51C systems . . . . . . . . . . . . . . 324
Completing the upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339

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12
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 tells you how to replace hardware in Meridian 1 systems. In
this manual, “replacing hardware” means removing a faulty piece of
equipment and installing identical operating equipment. The procedures in
this document are based on the assumption that the system is properly
installed (for example, all card locations, option switch settings, and cable
connections are correct) and was fully operational before the hardware fault.
To use this document, you should have a basic knowledge of Meridian 1
maintenance procedures. Generally, only common tools (such as socket
wrenches, screwdrivers, and pliers) are required to perform these procedures.
This document does not provide procedures for locating and clearing faults.
See Fault Clearing (553-3001-510) to locate and clear faults.
References See the Meridian 1 planning and engineering guide for:
•System Overview (553-3001-100)
•Spares Planning (553-3001-153)
•Equipment Identification (553-3001-154)
See the Meridian 1 installation and maintenance guide for:
•System Installation Procedures (553-3001-210)
•Circuit Card: Installation and Testing (553-3001-211)

Page 12 of 362 About this document
553-3001-520 Standard 16.00 April 2000
•Telephone and Attendant Console: Installation (553-3001-215)
•General Maintenance Information (553-3001-500)
•Fault Clearing (553-3001-510)
See the X11 software guide for an overview of software architecture,
procedures for software installation and management, and a detailed
description of all X11 features and services. This information is contained in
two documents:
•X11 System Management (553-3001-300)
•X11 Features and Services (553-3001-306)
See the X11 Administration (553-3001-311) for a description of all
administration programs and maintenance programs. Also, see the X11
System Messages Guide (553-3001-411) for interpreting system messages.

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18
Accessing the system
Content list The following are the topics in this section:
•Reference list 13
•Access through the system terminal 14
•Access through the maintenance telephone 15
Reference list
The following are the references in this section:
•X11 Administration (553-3001-311)
•X11 System Management Applications (553-3001-301)
When you replace equipment, you often send commands to the system
software in order to disable faulty equipment and to enable and test newly
installed equipment.
You send maintenance commands to the system through the system terminal
orthe maintenancetelephone. This section gives the procedures for accessing
the system through these devices.
Note: The Multi User Login feature, available with X11 release 19 and
later, allows more than one device to interact with the Meridian 1. Refer
to X11 System Management Applications (553-3001-301) for details on
using this feature.

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Access through the system terminal
You can send maintenance commands and receive system messages by
accessing the CPU through an RS-232 device, such as a video display
terminal (VDT) or teletypewriter (TTY).
When you access the system through a system terminal, a login procedure is
required (see Procedure 1). All system passwords are initially set as 0000, but
you can change passwords in the Configuration Record (LD 17).
Note: If a sysload occurs before you save a new password in a data
dump, the last active password remains valid.
Each system has two levels of passwords: level 1 is for general use, level 2 is
for administrative use. Either password is accepted in the login procedure.
Procedure 1
Access through the system terminal
1Press the return key.
a) If the response is a period (.), you are ready to log into the
system.
b) If the response is
OVL111 nn TTY xor OVL111 nn SL1
someone else is logged into the system. When they have
logged off, press return and go to Step 2.
c) If the response is
OVL111 nn IDLE or OVL111 nn BKGD
you are ready to log into the system. Go to Step 2.
d) If the response is
OVL000 >
you are already logged into the system. Go to Step 5.
Note:
Responses vary with different Background Terminal packages.
2Log into the system by entering
LOGI
then press the return key.

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3The normal response is
PASS?
If there is any other response, see the X11 Administration
(553-3001-311).
4Enter either the level 1 or level 2 password and press the return key.
If the password is correct, the system responds with the prompt >.
5Load a program by entering
LD xx “xx” represents the number of the program
6Perform tasks.
7End the program by entering
END or ****
8Always end the login session with
LOGO
Background routines are then loaded automatically.
Access through the maintenance telephone
A telephone functions as a maintenance telephone when you define the
class-of-service as MTA (maintenance set allowed) 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.
Note: The Core Common Equipment Diagnostic (LD 135) andCore I/O
Diagnostic (LD 137) are among the overlays that cannot be accessed
through a maintenance telephone.
You can test tones and outpulsing through the maintenance telephone.
Specificcommands for those tests are givenin the Tone and Digit Switch and
Digitone Receiver Diagnostic (LD 34).
To access the system using the maintenance telephone, see Procedure 2. To
enter commands, press the keys that correspondto the letters and numbers of
the command (for example, to enter LD 42 return,key in 53#42##). Table 1
shows the translation from a terminal keyboard to a telephone dial pad.

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553-3001-520 Standard 16.00 April 2000
Note: To use the maintenance telephone, the peripheral equipment loop
for that telephone must be operating.
Table 1
Translation from keyboard to telephone dial pad
Keyboard Dial pad
A
D
G
J
M
P
T
W
B
E
H
K
N
R
U
X
C
F
I
L
O
S
V
Y
1
2
3
4
5
6
7
8
9
0
Space or #
Return
1
2
3
4
5
6
7
8
9
0
#
##
Note:
There is no equivalent for Q or Z on a dial pad.

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Procedure 2
Access through the maintenance telephone
1Press the prime DN key.
2Place the set in maintenance mode by entering
3Check for busy tone by entering “return”
##
a) If there is no busy tone, go to Step 5.
b) If there is a busy tone, a program is active. To end an active
program and access the system enter
****
4Load a program by entering
5Perform tasks.
6Enter **** to exit the program and return the telephone to call
processing mode. Background routines arethen loaded automatically.
xxxx91 “xxxx” is the customer Special Prefix (SPRE)
number. It is definedin the CustomerData Block and
can be printed using LD 21. The SPRE number is
typically “1” (which means you would enter
191 ).
53#xx## “xx” represents the number of the program

Page 18 of 362 Accessing the system
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Page 19 of 362
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24
Hardware replacement guidelines
Content list The following are the topics in this section:
•Precautions 19
•Power equipment 19
•Circuit cards 20
•Data disks 21
•Precautions 19
Precautions To avoid personal injury and equipment damage, review the following
guidelines before handling Meridian 1 equipment.
Power equipment
There are no user-repairable components in the power system. If a power
supply fails, the complete unit must be replaced. Do not disassemble a power
supply under any circumstances.
WARNING
To avoid the danger of electric shock, be very careful when you work
with power equipment and connections. Warning notices are displayed
and must be heeded.

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Circuit cards
Handle cards as follows:
• Unpack or handle cards away from electric motors, transformers, or
similar machinery.
• Handle cards by the edges only. Do not touch the contacts or
components.
• Set cards on a protective antistatic bag. If an antistatic bag is not
available, hand-hold the card, or set it in a card cage unseated from the
connectors.
• Store cards in protective packing.Do not stack cards on top of each other
unless they are packaged.
To avoid card damage from static discharge, wear a properly connected
antistaticwrist strap when you work onMeridian 1 equipment.If a wrist strap
is not available, regularly touch one of the bare metal strips in a module to
discharge static. Figure 1 shows the recommended connection points for the
wrist strap and the bare metal strips you should touch.
Figure 1
Static discharge points
Wrist strap
connection point Bare metal strip
553
-
5000
Wrist strap
connection point Bare metal strip
Power supply slot
Module
front
Module
rear