Nortel Meridian Meridian 1 Parts list manual

Meridian 1
Hardware Replacement
Document Number: 553-3001-520
Document Release: Standard 17.00
Date: January 2002
Year Publish FCC TM
Copyright © 1990– 2002 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. Intel and Pentium are trademarks of Intel Corporation.
cPCI is a trademark of PCI Industrial Computer Manufacturers Group.

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Hardware Replacement
Revision history
January 2002 Standard 17.00. This document is up-issued to support Meridian 1
Release 25.40 systems. This document is up-issued to include Call Processor
Pentium (CP PII) and Fibre Network Fabric (FNF) for Option 81C.
April 2000 Standard 16.00. This is a global document and is up-issued for
X11 Release 25.0x.
November 1999 Standard 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 14.00. This document is reissued for X11 Release 24.
October 1997 Standard 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 12.00. This document is reissued to include Call Processor (CP)
card memory requirements for Release 22 and other technical information.
December 1995 Standard 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.

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553-3001-520 Standard 17.00 January 2002
July 1995 Standard 10.00. This document is reissued to include international
information to create a global Nortel Networks technical publication (NTP),
Meridian1Option81C,and minortextedits. Changestotechnicalcontent are
noted by revision bars in the margins.
December 1994 Standard 9.0. Reissued for technical content.
December 1994 Standard 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 7.0. Reissued to include theinformationfor Meridian 1 Option 61C.
Changes to technical content are noted by revision bars in the margins.
August 1993 Standard 6.0. Changes to technical content are noted by revision bars in the
margins.
April 1993 Standard 5.0. New information and changes to technical content are noted by
revision bars in the margins.
December 1992 Standard 4.0. New information and changes to technical content are noted by
revision bars in the margins.
December 1991 Standard 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 2.0.
January 1990 Standard 1.0.

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Hardware Replacement
6
Contents
About this document . . . . . . . . . . . . . . . . . . . . . . . 7
Accessing the system . . . . . . . . . . . . . . . . . . . . . . . 9
Hardware replacement guidelines . . . . . . . . . . . . . 15
Replacing equipment . . . . . . . . . . . . . . . . . . . . . . . 21
Replacing an NT7D10 PDU with an
NT7D67CB PDU . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

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Hardware Replacement
8
About this document
This document applies to Meridian 1 Internet Enabled systems.
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.
Who should use this document
This document is intended for individuals responsible for system
maintenance.
How this document is organized
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.

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Hardware Replacement
14
Accessing the system
Content list The following are the topics in this section:
Reference list . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Access through the system terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Access through the maintenance telephone . . . . . . . . . . . . . . . . . . . . . 11
Reference list
The following are the references in this section:
•Administration (553-3001-311)
•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
or the maintenance telephone. This section gives the procedures for accessing
the system through these devices.
Note: The Multi User Login feature, available with software Release 19
and later, allows more than one device to interact with the Meridian 1.
Refer to System ManagementApplications (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 on page 10). All system passwords are initially set
as 0000, but you can change passwords inthe 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 forgeneral 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 on page 10.
c) If the response is
OVL111 nn IDLE or OVL111 nn BKGD
you are ready to log into the system. Go to Step 2 on page 10.
d) If the response is
OVL000 >
you are already logged into the system. Go to Step 5 on
page 11.
Note: Responses vary with different Background Terminal packages.
2Log into the system by entering
LOGI
then press the return key.

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Hardware Replacement
3The normal response is
PASS?
If there is any other response, see 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 EquipmentDiagnostic (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 given in the Tone and Digit Switch and
Digitone Receiver Diagnostic (LD 34).
To access the system using the maintenance telephone, see Procedure 2 on
page 13. To enter commands,press the keys that correspond to the letters and
numbers of the command (for example, to enter LD 42 return,key in
53#42##). Table 1on page 12shows thetranslation froma terminalkeyboard
to a telephone dial pad.

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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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Hardware Replacement
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 on page 11.
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 are thenloaded automatically.
xxxx91 “xxxx” is the customer Special Prefix (SPRE)
number. It is definedin the Customer Data 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

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20
Hardware replacement guidelines
Content list The following are the topics in this section:
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Circuit cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Data disks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Options 51C, and 61C cable guidelines . . . . . . . . . . . . . . . . . . . . . . . . 18
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.
DANGER OF ELECTRIC SHOCK
To avoid the danger of electric shock, be very careful
when you work with power equipment and
connections. Warning notices on the equipment 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
antistatic wriststrap when youwork onMeridian 1 equipment. Ifa wrist strap
is not available, regularly touch one of the bare metal strips in a module to
discharge static. Figure 1 on page 16 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

Hardware replacement guidelines Page 17 of 250
Hardware Replacement
During replacement procedures:
• Turn off the circuit breaker or switch for a module power supply before
the power supply is removed or inserted.
• In AC-powered systems, capacitors in the power supply must discharge.
Wait five full minutes between turning off the circuit breaker and
removing the power supply from the module.
• Software disable cards, if applicable, before they are removed or
inserted.
• Hardware disable cards, whenever there is an enable/disable switch,
before they are removed or inserted.
• Return defectiveor heavily contaminated cards to a repair center. Do not
try to repair or clean them.
Data disks
Follow the precautions below to avoid damaging disks:
• Handle only the hard surface; never touch the recording surface.
• Keep disks away from strong magnetic fields.
• Avoid exposing disks to extreme heat, rapid changes in temperature, or
high humidity.
• Store disks in a suitable container.
To install a disk, make sure the arrow on the label is pointing up and the
rounded corner is on the bottom on the right-hand side.
CAUTION
Damage to Equipment
The disk drive can be damaged if an upside-down
disk is forced into the slot. If there is significant
resistance when you try to insert a disk, remove the
disk and check the position.

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Options 51C, and 61C cable guidelines
To disconnect a cable from the Core/Network Module backplane, use the
P0741489 Extraction Tool provided in the rear of the module (behind the I/O
safety panel).
1Grasp the cable connector by the strain relief tab.
2Center the longer flat edge on the angled end of the tool between the
cable connector and the wall of the shroud on the right side of the cable
connector.
Note: If the straight end of the tool is notched, use that end if the
connector can be accessed straight-on. If you must angle the tool at all,
use the angled end.
3Gently insert the extraction tool and gradually apply pressure while
gently rocking the cable connector up and down.
4Stop applying pressureas soonas thedetentofthe cable connector comes
loose from the shroud.
5Slowly remove the extraction tool and the cable connector.
CAUTION
Damage to Equipment
You must use the P0741489 Extraction Tool to
disconnect cables from the backplane shrouds in the
NT5D21 Core/Network Module. Follow the
procedure below to avoid bending or breaking pins
when removing cable connectors from the backplane
shrouds. Do not insert the extraction tool unless the
cable connector is locked into the shroud. Do not
force the extraction tool deeper than the detent on
the cable connector.

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Before you connect cables to the backplane, visually inspect the backplane
shroud connectors to make sure there are no bent pins. To connect cables:
1Orient the cable connector so the strain relief paddle is to the right.
2Partially insert the cable connector so its guides mate to the
corresponding backplane connector.
3Apply a small amount of pressure to push the cable connector straight
into the backplane connector. You will feel a detent click when the
connector seats.
CAUTION
Damage to Equipment
Pins may be bent or broken if you try to insert the
cable connector at an angle. Do not push the
connector in any further after you hear the detent
click.

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