Nortel SONET AccessNode User manual

P0904244
SONET Products
AccessNode
Modular Business Package VTBM Ring
User Guide
Issue 1.0 June 1999

AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
SONET Products
AccessNode
Modular Business Package VTBM Ring User Guide
Copyright 1996–1999 Northern Telecom, All Rights Reserved.
Printed in Canada
All information contained in this document is subject to change without notice. Northern Telecom reserves the right to make
changestoequipmentdesignorprogramcomponents,asprogressinengineering,manufacturingmethods,orothercircumstances
may warrant.
ACCESSNODE, NORTEL, and NORTEL NETWORKS are trademarks of Northern Telecom.
Document release: Issue 1.0
Date: June 1999

AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
iii
Publication history
June 1999 Release-independent Standard Issue 1.0 of the document.
February 1999 Release-independent Standard release of the document, Issue 1.0. For this
release, the following information was updated or added:
• Added new Cooling Unit NT4K18CA
• Added new Breaker Interface Panel (BIP) NT4K14BA
Note: With the February 1999 release, references to the software release
number (suchas AN15or AN16) havebeen deleted, makingthis document
release-independent. This document will be rereleased only when
technical changes occur.
June 1998 Release-independent Standard 01.01 release of the document.
September 1997
Standard 01.01 AN14 released for general distribution.
July 1996 Standard 01.01AN12releasedforgeneraldistribution.This isanewdocument
that describes the after-service procedures for the modular business package
virtual tributary bandwidth manager master and expansion cabinets.

iv Publication history
AccessNode P0904244 Issue 1.0

AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
v
Contents
About this document ix
Before using this document ix
Additional documentation x
How to use this document x
FCC Part 15.21 radio interference information to the user x
Abbreviations for the colors of conductor insulation in cables xi
Safety guidelines and warnings 1-1
Warnings and safety notices 1-1
Optical fiber cables 1-2
Handing optical fibers 1-3
International electrical symbols on equipment 1-3
Introduction to equipment and cabling configurations 2-1
Chapter contents 2-1
Product description 2-2
OC-12 fiber ring application 2-2
Digital fiber access 2-3
Single-ended 2-5
DS1-fed 2-6
Types of cabinet 2-7
Master cabinet 2-7
Expansion cabinet 2-7
Cabinet arrangement 2-7
Common features of MBP cabinets 2-9
Covers 2-9
Anchoring kits 2-9
Top cap kit 2-9
Grille kit 2-9
Cable extender kit 2-9
Battery equipment module 2-9
Installation in restricted areas and unrestricted areas 2-9
MBP master cabinet configuration 2-10
96- to 192-line master cabinet configuration 2-10
MBP expansion cabinet configuration 2-12
96- to 480-line expansion cabinet configuration 2-12
Powering 2-14
Numbering of equipment shelf and slot positions 2-14
Rectifiers 2-14
ABM shelf 2-15

vi Contents
AccessNode P0904244 Issue 1.0
Copper-distribution shelves 2-16
CDS line drawer slot positions 2-16
Circuit breaker designations 2-17
ABM breaker interface panel (NT4K14BA) circuit breakers 2-17
Battery equipment module circuit breakers 2-18
DC distribution unit circuit breakers 2-18
System expansion 2-19
ABM circuit pack locations 2-20
Cabling diagrams 2-21
Environmental requirements 2-27
Temperature 2-27
Altitude 2-27
Relative humidity 2-27
Atmospheric dust 2-27
Electrostatic discharge (ESD) 2-27
Mechanical shock 2-27
Technical specifications 2-28
Weight 2-28
AC input 2-28
DC power 2-28
Removing covers and grilles 3-1
Chapter contents 3-1
Procedure 3-1 Removing the cabinet covers 3-2
Procedure 3-2 Removing the side panels 3-4
Procedure 3-3 Removing the pedestal grilles 3-6
Procedure 3-4 Removing the top cap grilles 3-8
Procedure 3-5 Removing separator bars 3-10
Procedure 3-6 Removing the ABM shelf cover 3-12
Procedure 3-7 Removing the breaker interface panel cover 3-14
Interpreting an LED or lamp 4-1
Chapter contents 4-1
Top cap LED 4-1
Status of in-service equipment LEDs 4-2
Status of out-of-service equipment LEDs 4-3
Status of failed equipment LEDs 4-4
Replacing modules in a copper-distribution shelf 5-1
Chapter contents 5-1
Procedure 5-1 Replacing the NT4K62 copper-distribution shelf power card 5-3
Procedure 5-2 Replacing the line cards 5-5
Procedure 5-3 Replacing the NT4K70 narrowband line interface card 5-10
Procedure 5-4 Replacing the NT4K73AA or NT4K73CA metallic test access
card 5-13
Replacing modules in a BIP 6-1
Chapter contents 6-1
Procedure 6-1 Replacing the NT4K64BA Alarm relay card 6-2
Procedure 6-2 Replacing the NT4K61BA Talk battery filter card 6-4
Procedure 6-3 Replacing the NT4K1472 BIP LED card 6-6
Procedure 6-4 Replacing a circuit breaker in the BIP 6-15

Contents vii
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
Replacing modules in a common-equipment shelf 7-1
Chapter contents 7-1
Procedure 7-1 Replacing an NT4K30 DS3 I/O card 7-3
Procedure 7-2 Replacing an NT4K31 DS1 protection bridge card 7-4
Procedure 7-3 Replacing an NT4K32 DS1 input card 7-7
Procedure 7-4 Replacing an NT4K33 DS1 output card 7-9
Procedure 7-5 Replacing an NT4K50 side interconnect left 7-11
Procedure 7-6 Replacing an NT4K51 side interconnect right 7-13
Procedure 7-7 Replacing an NT4K52 processor card 7-14
Procedure 7-8 Replacing an NT4K53 maintenance interface card 7-17
Procedure 7-9 Replacing an NT4K54 test access card 7-20
Procedure 7-10 Replacing an NT4K55 access interface card 7-22
Procedure 7-11 Replacing an NT4K56 transport interface card 7-24
Procedure 7-12 Replacing an NT4K57 integrated remote test unit 7-26
Procedure 7-13 Replacing an NT4K58LA serial I/O card 7-28
Procedure 7-14 Replacing an NT4K58MA common-equipment power card 7-30
Procedure 7-15 Replacing an NT4K75 timing and cross-connect 7-34
Procedure 7-16 Replacing an NT7E05 OC-12 VTBM optical interface 7-37
Procedure 7-17 Replacing an NT7E04 DS1/VT mapper 7-45
Procedure 7-18 Replacing an NT7E08 DS3 mapper 7-50
Testing the batteries and rectifiers 8-1
Chapter contents 8-1
Warnings and cautions 8-2
Procedure 8-1 Rejuvenating the batteries 8-5
Procedure 8-2 Testing and replacing the batteries 8-8
Procedure 8-3 Replacing a rectifier 8-14
Procedure 8-4 High voltage shutdown adjustments for replacement
rectifiers 8-16
Procedure 8-5 Setting equalize (EQL) voltage level 8-21
Procedure 8-6 Adjusting the float voltage 8-23
Procedure 8-7 Load sharing adjustments for replacement rectifiers 8-25
Replacing the low-voltage disconnect unit 9-1
Chapter contents 9-1
Warnings and cautions 9-2
Procedure 9-1 Removing and installing an LVD 9-3
Procedure 9-2 Restoring power to the system 9-9
Procedure 9-3 Verifying the LVD indicators 9-10
Procedure 9-4 Adjusting the LVD unit 9-13
Procedure 9-5 Adjusting the load sharing 9-16
Procedure 9-6 Return the system to service 9-18
MBP routine maintenance 10-1
Chapter contents 10-1
Routine maintenance intervals 10-1
Procedure 10-1 Checking and adjusting rectifier voltages 10-2
Procedure 10-2 Changing the MBP air filter 10-6
Procedure 10-3 Replacing the NT4K2630 MBP blower module 10-10
Ordering information 11-1
Chapter contents 11-1

viii Contents
AccessNode P0904244 Issue 1.0
MBP VTBM cabinets 11-2
MBP equipment 11-2
Miscellaneous MBP parts 11-3
MBP cables 11-4
Equipment circuit packs and modules 11-9
ABM shelf circuit packs 11-9
Copper-distribution shelf circuit packs 11-12
Breaker interface panel 11-13
Cooling unit 11-13
Related documentation 11-14
Technical support information 12-1
List of acronyms 13-1
Index 14-1

AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
ix
About this document
This document contains instructions for performing the following user and
maintenance activities:
• alarm recognition
• replacing modules and circuit packs
• general maintenance
• shelf/equipment circuit breaker locations and designations
• wiring diagrams (power)
Before using this document
Users of this document should be familiar with communications equipment
and the operation of the tools required to complete the installation tasks.
Before using this document to use or maintain AccessNode equipment in
modular business package (MBP) cabinets, you should already have
considered the following list of requirements and developed a floor plan, as
described in Modular Business Package VTBM Ring Installation Guide.
• fire protection and safety requirements
• equipment room requirements
• seismic requirements
• grounding and power requirements
• cabling requirements
• circuit and card provisioning requirements
CAUTION
Service-affecting procedures
Some of the procedures in this document are affect service
and must be done with the system powered down. Before
performing a service-affecting procedure, obtain and have
on-site a copy of the AccessNode system Recovery
Procedures, 323-3001-545, in Maintenance, Volume 5C.

xAbout this document
AccessNode P0904244 Issue 1.0
Additional documentation
If you intend to perform a service-affecting procedure, obtain and have on-site
the following documents that you may need to restore the system to service:
•Alarm and Trouble Clearing Procedures, 323-3001-543, in Maintenance,
Volume 5A
•Recovery Procedures, 323-3001-545, in Maintenance, Volume 5C
How to use this document
Read Chapter 1, “Safety guidelines and warnings,” before beginning any user
or maintenance procedure:
Perform the procedure steps in the order presented.
If you cannot completeanyprocedure in this document,contact your next level
of support for assistance.
FCC Part 15.21 radio interference information to the user
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. 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 his own expense.

About this document xi
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
Abbreviations for the colors of conductor insulation in cables
In this document, a uniform system of abbreviations is used to represent the
colors of the conductor insulation used in equipment cables. These
abbreviations take the form:
<pair_color> <group_marker_type> <group_marker_color>
For example, the abbreviation BL 2W (representing Pair 1 of the second
25-pair binder) means that the conductor has a blue insulation background
with two white dots spaced 18 mm (3/4 in.) apart. The abbreviation BL W
(representing Pair 1 of the first 25-pair binder) means that the conductor has a
blue insulation background with a single white stripe.
where:
<pair_color> This is the background color of the conductor insulation
which indicates the pair color.
BL blue (pair 1 of the binder group)
O orange (pair 2 of the binder group)
G green (pair 3 of the binder group)
BR brown (pair 4 of the binder group)
S slate (pair 5 of the binder group)
<group_marker_type> This is the type of group marker used on the conductor
insulation.
1 single dots spaced about 18 mm (3/4 in.) apart
2 two dots spaced about 3 mm (1/8 in.) apart
with about 18 mm (3/4 in.) between each pair
of dots
3 dashes about 3 mm (1/8 in.) long spaced
about 18 mm (3/4 in.) apart
none one colored stripe on conductor jacket
<group_marker_color> Is the color of the dot, dots or the stripe used as the group
marker on the conductor insulation.
W white (binder group 1)
R red (binder group 2)
BK black (binder group 3)
Y yellow (binder group 4)
V violet (binder group 5)

xii About this document
AccessNode P0904244 Issue 1.0

AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
1-1
Safety guidelines and warnings 1-
This chapter contains warnings and precautions for personal safety, and for the
correct handling and operation of equipment while it is being installed.
Warnings and safety notices
This document contains notices that are designed to alert you about the risk of
personal injury, or of damage to equipment.
Samples of the formats for dangers and caution notices used in this document
are as follows:
To avoid personal injury, follow all danger warnings provided with this
product, along with the safety procedures established by your company.
To avoid damage to equipment, or service interruptions, follow all cautions
and warnings provided with this product, as well as the procedures established
by your company.
DANGER
Risk of personal injury
A danger notice warns you about a risk of personal injury.
CAUTION
Risk to service or equipment
A caution notice warns you about a risk of service
interruption or of equipment damage.

1-2 Safety guidelines and warnings
AccessNode P0904244 Issue 1.0
Optical fiber cables
AccessNode equipment and associated optical test sets use laser sources that
emit light energy into fiber cables. This energy lies within the infrared
(invisible) regions of the electromagnetic spectrum.
Laser products are subject to federal and state or provincial regulations, and
local practices. Regulation 21 CFR 1040 of the U.S. Bureau of Radiological
Health requires manufacturers to certify each laser product as Class I, Class II,
Class III, or Class IV, depending on the characteristics of the laser radiation
that is emitted. In terms of health and safety, Class I products represent the
least hazard (none at all), while Class IV products represent the greatest
hazard.
Although Nortel Networks optical products have a Class I certification,
hazardous exposure to laser radiation could occur when fibers that
interconnect system components are disconnected, broken, or are installed
while equipment is under power. Certain procedures carried out during
installation or testing require the handling of optical fibers without dust caps,
and therefore increase the risk of exposure. Exposure either to visible or
invisible laser light could cause eye damage under certain conditions.
The caution label at the right appears on the optical
interface card, near the optical connection, and must
be complied with.
DANGER
Risk of eye injury
At all times when handling optical fibers, follow the safety
procedures recommend by your company.
Read and follow the precautions in the following paragraphs
to reduce the risk of exposure to laser radiation.
Avoid direct exposure to
beam. Invisible light can
blind. Keep all optical
connectors capped.
Caution

Safety guidelines and warnings 1-3
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
Handing optical fibers
During the installation, service, repair, or removal of optical fiber cables or
equipment, follow these rules:
• Avoid direct exposure to fiber ends or optical connections ends, where the
laser signal is present.
• Wear safety glasses when handling optical fibers to avoid eye injury from
flying glass fragments.
• Small bits of glass fiber are almost invisible on your fingers. Therefore,
always wipe your hands on a tissue or on a clean absorbent cloth before
making any contact with your eyes, or the area around your eyes.
• Handle optical fibers carefully, and always position them in a safe and
secure location during the installation procedures.
• Do not handle broken or cut pieces of fiber with your bare fingers. Use
tweezers or the sticky side of adhesive tape to pick up and discard loose
fiber ends.
• Place all fiber cuttings or ends in a plastic bottle marked “Danger, Sharp
Objects”.
• Protect optical fiber connectors with dust caps at all times.
International electrical symbols on equipment
A number of International Electrotechnical Commission (IEC) symbols are
used on AccessNode equipment. The labels and their meanings are as follows:
Power on
DANGER
Risk of eye injury
If you suspect that you may have aglass chip in the eye, seek
medical attention immediately.
This symbol indicates that a main power on/off switch
is in the on position.

1-4 Safety guidelines and warnings
AccessNode P0904244 Issue 1.0
Power off
Protective grounding terminal
Alternating current
Direct current
This symbol indicates that a main power on/off switch is
on the off position.
This symbol indicates the location of a terminal that
must be connected to earth ground before you make
any other connections to the equipment.
This symbol indicates the location of a terminal that
supplies alternating current or to which a source of
alternating current is applied.
This symbol indicates the location of a terminal that
supplies direct current or to which a source of direct
current is applied.

Safety guidelines and warnings 1-5
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
Direct current and alternating current
Dangerous voltage
Electrostatic discharge
This symbol indicates the location of a terminal that
supplies direct current or alternating current, or to
which a source of direct current or alternating
current is applied.
This symbol indicates the presence of a dangerous
voltage inside an equipment enclosure. This voltage
maybeofsufficientmagnitudetoconstituteariskof
electric shock to persons working on the equipment.
This symbol indicates a danger of damage to equipment
due to the presence of static electricity. The presence of
static electricitymay damage equipment.Alwaysuse an
electrostatic discharge (ESD) grounding strap when
working on or handling equipment circuit packs.

1-6 Safety guidelines and warnings
AccessNode P0904244 Issue 1.0