Northern Telecom QCA146 Manuale utente
© 1987 Northern Telecom
All rights reserved.
NT, Meridian 1, Meridian and SL-1 are trademarks of Northern Telecom.
Title to and ownership of SL-1 software shall at all times remain with Northern Telecom. SL-1
software shall not be sold outright and the use thereof by the customer shall be subject to the
parties entering into agreement as specified by Northern Telecom.
Information contained in this document is subject to change. Northern Telecom reserves the
right, without notice, to make changes in equipment or program components as progress in
engineering, manufacturing, or technology may warrant.
2-Mb/s Remote Peripheral Equipment Appendix 1 to 553-2741-200
SL-1
2-Mb/s Remote Peripheral Equipment
QCA146 cabinet and QSD74 shelf installation and testing
Publication number: Appendix 1 to 553-2741-200
Document release: Group F
Document status: Standard
Date: 90 11 02
2-Mb/s Remote Peripheral Equipment Appendix 1 to 553-2741-200
Reason for revision
90 11 02 Changes have been made to add references to publication 553-2931-200
for Generic X11 Supplementary Features (Phase 6) Remote Perpheral
Equipment and include miscellaneous updates.
i of i page
2-Mb/s Remote Peripheral Equipment Appendix 1 to 553-2741-200
Contents
General 1-1
Description 2-1
QCA146 RPE cabinet 2-1
Expansion shelves 2-1
QSD74 RPE shelf 2-1
QSD66 PE expansion shelf 2-1
Loop assignment 2-2
Spare loop 2-2
Bus terminating units 2-2
Network extender 2-2
Other circuit packs 2-3
Power converters 2-3
AC power line cords 2-3
Reserve batteries 2-4
Cooling units 2-4
Environment 2-4
Grounding 2-4
Installation 3-1
1-1 of 1 page
2-Mb/s Remote Peripheral Equipment Appendix 1 to 553-2741-200
General
This Appendix describes the installation, connections and testing of
Remote Peripheral Equipment (RPE) installed in a QCA146 RPE
cabinet and in a QSD74 RPE shelf mounted in a cabinet either at the
remote end or the local end.
A description of the use and operation of RPE is given in NTPs
553-2741-100 for Generic X08 and 553-2931-100 for Generic X11
Including Supplementary Features.
2-1 of 5 pages
2-Mb/s Remote Peripheral Equipment Appendix 1 to 553-2741-200
Description
QCA146 RPE cabinet
The single-tier base QCA146 RPE cabinet is equipped with an RPE
shelf, one PE shelf capable of accommodating ten PE line packs and a
peripheral buffer circuit pack, and the required power equipment. The
base cabinet can be expanded to a two- or three-tier cabinet by the
addition of RPE or PE expansion shelves.
Note: The expansion RPE shelf can only be added as the second
tier. The PE expansion shelf can be the second or third tier.
Expansion shelves
QSD74 RPE shelf
The QSD74 RPE shelf assembly can be mounted in a QCA146 RPE
cabinet at the remote location when additional loops are required. The
shelf is designed to contain all the RPE related circuit packs required to
operate three network loops. Included in the shelf assembly is a PE
shelf containing eight slots for lines and trunks. The QSD74 shelf can
also be used at the local end when the common equipment is housed in
a QCA136 or QCA141 CE cabinet as shown in Figure 1-1.
QSD66 PE expansion shelf
The QSD66 PE expansion shelf is used to expand a QCA146 RPE
cabinet to a two- or three-tier cabinet. The QSD66 is equipped with two
PE shelves each capable of accommodating eight line circuit packs and
one peripheral buffer circuit pack.
2-2 Description
2-Mb/s Remote Periperal Equipment Appendix 1 to 553-2741-200
Note: Although the QSD66 PE expansion shelf provides dual-loop
capabilities, the shelf can only be used in a single-loop mode when
operating with RPE.
Loop assignment
Remote loops are defined in groups in software using Overlay Program
52 (refer to 553-2321-310 and 553-2321-311 for Generic X08, and 553-
2931-200 and Appendix 1 to 553-2311-311 for Generic X11 with
Supplementary Features). Each group can be assigned four members.
Loops are assigned from left to right on the RPE shelf. Circuit packs for
each loop are located in the following slots in the RPE shelf:
• slots 2 and 3 for the first loop (LM0 in software)
• slots 5 and 6 for the second loop (LM1 in software)
• slots 10 and 11 for the third loop (LM2 or LM3 in software).
Spare loop
When a spare loop is assigned to a shelf, it must be connected to the
third loop on the shelf and defined as loop member LM3 in software.
Note: The spare loop cannot be defined as LM0, LM1 or LM2 in
software.
Bus terminating units
Each QSD74 RPE shelf requires three Bus Terminating Units (BTUs).
When used in a QCA146 cabinet (remote end), three QPC477A23 BTUs
are required. When used in a QCA136 or QCA141 CE cabinet (local
end), three QPC477A24 BTU are required.
Connectors for inserting the BTU are located between slots 3 and 4, 6
and 7, 9 and 10 at the front of the RPE shelf.
Description 2-3
2-Mb/s Remote Peripheral Equipment Appendix 1 to 553-2741-200
Network extender
Each RPE shelf (local and remote ends) requires one QPC769 Network
Extender circuit pack to connect a maximum of three network loops to
the RPE equipment.
Other circuit packs
Information about other RPE related circuit packs used with the
QCA146 RPE cabinet is given in 553-2741-200 (X08) or 553-2931-200
(X11 Supplementary Features).
Power converters
QPC705 Power Converter. The QPC705 power converter supplies ±15 V
(for SL-1 and digital telephones) and -150 V (for message waiting) to
the PE shelf in the first tier of the cabinet. A QCAD278 cable is
required to connect the QPC705 converter.
QPC706 Power Converter. The QPC706 power converter provides all
the required power supplies to each PE shelf in the second and third
tiers of the cabinet. One converter is required for each PE shelf and is
installed in the designated slot on each shelf.
QPC691 and QPC355 Power Converters. One of these power converters
is required in slot 13 of the QSD74 shelf when it is mounted in a
QCA136 or QCA141 CE cabinet.
AC power line cords
Three commercial power line cords can be used with the QCA146 RPE
cabinet.
(a) A QCAD273 line cord is used when a 115 V 15A power supply is
provided. A NEMA type 5-15R power supply receptacle is required
to accommodate the line cord.
(b) A QCAD274 line cord is used when a 220 V 20A power supply is
provided. A NEMA type L6-20R power supply receptacle is
required to accommodate the line cord.
(c) A QCAD275 line cord is used when a 110 V 30A power supply is
provided. A NEMA type L5-30R power supply receptacle is
required to accommodate the line cord.
2-4 Description
2-Mb/s Remote Periperal Equipment Appendix 1 to 553-2741-200
Power cords are connected to the rear of the -48 V rectifier in the
cabinet.
Reserve batteries
One or two QBL24 battery units containing rechargeable dry cells can
be connected to the cabinet when service is required during commercial
power failures.
The cabinet can also be connected to lead acid batteries through a
QBL15 battery distribution box and a QCAD321 junction box assembly.
Cooling units
QUD24 Cooling Units located in the cabinet top assembly are required
in cabinet equipped with three tiers.
Environment
The QCA146 should be installed in an environment suitable for
Meridian SL-1. The location should be clean, dry and protected from
extreme heat or cold. The operating environment described in 553-
YYY1-200 for the location of the main Meridian SL-1 should be used as
a guide when installing the QCA146 RPE cabinet.
Grounding The QCA146 RPE cabinet must be connected to a suitable building
ground to ensure proper operation of the RPE equipment. Refer to 553-
YYY1-200 for a description of suitable building grounds.
Description 2-5
2-Mb/s Remote Peripheral Equipment Appendix 1 to 553-2741-200
Figure 2-1
Front view of typical CE cabinet
Common Equipment
Shelf
Peripheral Equipment
Shelf Position 1
PE Power Converter PE Power Converter
PE Power Converter
-48 V
Rectifier
QUAA3
Power Unit
QUX19
Power
Distribution
Unit
QUX20
Power
Distribution
Unit 2
Peripheral Equipment
Shelf Position 4 Peripheral Equipment
Shelf Position 5
First
Tier
Q
P
C
7
0
5
CONV
(Ill.5531273)
Q
M
M
4
3
Mass
Storage
Module
Dual LP PE BFR & DTR
Dual LP PE BFR & DTR
Dual LP PE BFR & DTR
Dual LP PE BFR & DTR
Dual LP PE BFR & DTR
12345678910111213
QPC320 CI
QPC319 RPC
QPC320 CI
QPC319 RPC
QPC769 NET EXT
QPC320 CI
QPC319 RPC
QSD74
RPE Shelf
Third
Tier
QSD66
Shelf
(or QSD74
Shelf for
Additional
RPE Loops)
Peripheral Equipment
Shelf Position 3
Second
Tier
QSD66
Shelf
(or QSD74
Shelf for First
Three RPE
Loops)
5/12V Converter
QPC190, QPC355
or QPC691
5/12V Converter
Remote Peripheral Equipment
Shelf Position 2
3-1 of 50 pages
3-
2-Mb/s Remote Peripheral equipment Appendix 1 to 553-2741-200
Installation
Procedures Chart 3-1 describes the procedures to follow when installing a QCA146
RPE cabinet.
Chart 3-2 describes the procedures to follow when installing an
additional QSD66 PE or QSD74 RPE shelf assembly in an existing
QCA146 RPE cabinet.
Chart 3-3 describes the procedures to follow when installing a QBL24
Battery Unit.
Chart 3-4 describes the procedures to follow when installing an
expansion QBL24 Battery Unit.
Chart 3-5 describes the procedures to follow when installing a QUA6
Power Fail Transfer Unit (PFTU).
Chart 3-6 describes the procedures to follow when installing alarm and
transfer wiring (P10).
Chart 3-7 describes the procedures to follow when installing a QPC705
power converter.
Chart 3-8 describes the procedures to follow when installing QUD24
cooling units.
Chart 3-9 describes the procedures to follow when installing a QCAD321
junction box assembly.
Chart 3-10 describes the procedures to follow when installing QBL15
battery distribution box.
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