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BSC6900 UMTS
V900R017C10
Installation Guide
Issue 01
Date 2015-03-25
HUAWEI TECHNOLOGIES CO., LTD.
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Copyright © Huawei Technologies Co., Ltd. 2015. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written
consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and the
customer. All or part of the products, services and features described in this document may not be within the
purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,
and recommendations in this document are provided "AS IS" without warranties, guarantees or representations
of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address: Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website: http://www.huawei.com
Email: [email protected]
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About This Document
Overview
This document describes how to install the BSC6900. The components to be installed include
external power cables, PGND cables, boards, signal cables, cabinet fittings, the computer serving
as the local maintenance terminal (LMT), and the alarm box. This document also describes how
to check the installed hardware, constructing connectors for power cables and signal cables, and
making and attaching engineering labels. Finally, this document provides requirements for the
operational environment of the equipment.
Product Version
The following table lists the product versions related to this document.
Product Name Product Version Solution Version
BSC6900 V900R017C10 RAN17.1
Intended Audience
This document is intended for installation personnel.
Organization
1 Change Description
This section provides information about the changes in different document versions. There are
two types of changes, including function changes and editorial changes. Function changes refer
to changes in functions of a specific product version. Editorial changes refer to changes in
wording or addition of information that was not described in the earlier version.
2 Tools Required for Installation
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The tools required for installing the BSC are tools for measuring, marking, drilling, and
fastening, small tools, auxiliary tools, instruments, and special tools.
3 Installation Process
The BSC6900 installation process includes the installation of the cabinet and its fittings, power cables and PGND cables, OMUc boards , signal cables, LMT computers, and alarm boxes.
4 Installing Power Cables and PGND Cables
This section describes how to install power cables and PGND cables between a cabinet and the
power distribution frame (PDF) ,and PGND cables between cabinets. For items and
specifications for checking the installation of the power cables and PGND cables, see 11.1
Checklist for BSC6900 Cable Installation.
5 Checking and Setting DIP Switches on Subracks
This section describes how to check and set the DIP switch on a subrack. In general, subracks
are installed in the cabinet before delivery.
6 Checking the Power-On Performance of Cabinet
This section describes how to check the power supply to cabinets, fan assembly, and boards.
7 Installing and Setting Boards
Most boards except the OMUa/OMUc/SAUa/SAUc boards are installed in subracks before the
delivery. If AEUa/AOUa/PEUa/PEUc/POUa/PAMU/PFCU boards are installed in the cabinet,
check and set the DIP switches of the boards. Install the OMUa/OMUc/SAUa/SAUc boards
onsite.
8 Installing the Signal Cables
This chapter describes how to install the signal cables according to the layout requirements. The
signal cables to be installed include clock signal cables, Ethernet cables, E1/T1 cables and optical
cables. For items and specifications for checking the installation of signal cables, see 11.1
Checklist for BSC6900 Cable Installation.
9 Installing the Alarm Box and the Computer Serving as the LMT
This section describes how to install an alarm box and a computer serving as the LMT. If you
are installing the computer and the alarm box in the equipment room, you can install them along
with the BSC6900 equipment. For items and specifications for checking the installation of the
LMT computer and the alarm box, see 11.3 Checklist for the Installation of the LMT
Computer and Alarm Box.
10 Attaching the Engineering Labels to the Cables
This chapter describes how to attach engineering labels to the power, PGND, and signal cables
after the cables are installed
11 Checklist for the Hardware Installation
This chapter describes how to check the hardware installation. The hardware consists of cables,
Local Maintenance Terminal (LMT) PC, and alarm box. In addition, you should check the
installation environment.
12 Installation Records
The table is used to record the BSC6900 hardware installation information.
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Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in equipment damage, data loss,
performance deterioration, or unanticipated results.
NOTICE is used to address practices not related to personal
injury.
Calls attention to important information, best practices and
tips.
NOTE is used to address information not related to personal
injury, equipment damage, and environment deterioration.
General Conventions
The general conventions that may be found in this document are defined as follows.
Convention Description
Times New Roman Normal paragraphs are in Times New Roman.
Boldface Names of files, directories, folders, and users are inboldface. For example, log in as user root.
Italic Book titles are in italics.
Courier New Examples of information displayed on the screen are in
Courier New.
Command Conventions
The command conventions that may be found in this document are defined as follows.
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Convention Description
Boldface The keywords of a command line are in boldface.
Italic Command arguments are in italics.
[ ] Items (keywords or arguments) in brackets [ ] are optional.
{ x | y | ... } Optional items are grouped in braces and separated by
vertical bars. One item is selected.
[ x | y | ... ] Optional items are grouped in brackets and separated by
vertical bars. One item is selected or no item is selected.
{ x | y | ... }* Optional items are grouped in braces and separated by
vertical bars. A minimum of one item or a maximum of all
items can be selected.
[ x | y | ... ]* Optional items are grouped in brackets and separated by
vertical bars. Several items or no item can be selected.
GUI Conventions
The GUI conventions that may be found in this document are defined as follows.
Convention Description
Boldface Buttons, menus, parameters, tabs, window, and dialog titles
are in boldface. For example, click OK .
> Multi-level menus are in boldface and separated by the ">"
signs. For example, choose File > Create > Folder.
Keyboard Operations
The keyboard operations that may be found in this document are defined as follows.
Format Description
Key Press the key. For example, press Enter and press Tab.
Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt
+A means the three keys should be pressed concurrently.
Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A means
the two keys should be pressed in turn.
Mouse Operations
The mouse operations that may be found in this document are defined as follows.
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Action Description
Click Select and release the primary mouse button without moving
the pointer.
Double-click Press the primary mouse button twice continuously and
quickly without moving the pointer.
Drag Press and hold the primary mouse button and move the
pointer to a certain position.
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Contents
About This Document.....................................................................................................................ii
1 Change Description.......................................................................................................................1
2 Tools Required for Installation..................................................................................................2
3 Installation Process.......................................................................................................................4
4 Installing Power Cables and PGND Cables.............................................................................6
4.1 Power Ca bles and PGND Cables to Be Installed...........................................................................................................7
4.2 Connections of Power Cables and PGND Cables..........................................................................................................8
4.3 Principles for Installing Power Cables and PGND Cables.............................................................................................8
4.4 Installing Power Cables and PGND Cables Between a BSC6900 Cabinet and the PDF...............................................9
4.4.1 Installing Power Cables and PGND cable Between the BSC6900 and the PDF in Overhead Cabling Mode............9
4.4.2 Installing Power Cables and PGND Cable Between the BSC6900 and the PDF in Underfloor Cabling Mode.......12
4.5 Installing the PGND Cables Between Adjacent Cabinets............................................................................................17
5 Checking and Setting DIP Switches on Subracks................................................................19
6 Checking the Power-On Performance of Cabinet.................................................................22
7 Installing and Setting Boards....................................................................................................24
7.1 Safety Precautions for Board Installation.....................................................................................................................25
7.2 Installing the OMUa/OMUc/SAUa/SAUc Boards.......................................................................................................25
7.3 Checking and Setting the DIP Switch on the Board.....................................................................................................27
7.4 DIP Switches on the BSC6900 Boards.........................................................................................................................29
8 Installing the Signal Cables......................................................................................................30
8.1 Signal Ca bles to Be Installed........................................................................................................................................32
8.2 Principles of Installing Signal Cables...........................................................................................................................34
8.3 Installing the Clock Signal Cables................................................................................................................................36
8.3.1 Installing the Y-Shaped Clock Cables.......................................................................................................................36
8.3.2 Installing Line Clock Signal Cables..........................................................................................................................39
8.3.3 Installing the BITS Clock Signal Cables...................................................................................................................41
8.4 Installing the Ethernet Cables.......................................................................................................................................44
8.4.1 Arranging the Ethernet Cables..................................................................................................................................44
8.4.2 Installing the Inter-SCUa Cables Between Different Subracks.................................................................................45
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8.4.3 Installing Ethernet Cables Between the OMUa and the LAN...................................................................................48
8.4.4 Installing the Ethernet Cables Between the OMUc Board and the LAN..................................................................51
8.4.5 Installing the Ethernet Cables Between the SAUa Board and the LAN....................................................................53
8.4.6 Installing the Ethernet Cables Between the SAUc Board and the LAN....................................................................54
8.4.7 Installing the Ethernet Cables Between the FG2a/FG2c Board and the Other Equipment.......................................56
8.5 Installing the E1/T1 Cables..........................................................................................................................................58
8.5.1 Arranging the E1/T1 Cables Between the AEUa/PEUa/PEUc Board and the DDF.................................................59
8.5.2 Installing the E1/T1 Cables Between the AEUa/PEUa/PEUc Board and the DDF in Overhead Cabling Mode......60
8.5.3 Installing the E1/T1 Cables Between the AEUa/PEUa/PEUc Board and the DDF in Underfloor Cabling Mode
............................................................................................................................................................................................68
8.6 Installing the Optical Cables.........................................................................................................................................75
8.6.1 Using the Accessories of the Optical Cable..............................................................................................................75
8.6.2 Arranging the Optical Cables....................................................................................................................................78
8.6.3 Installing the Optical Splitter/Combiner....................................................................................................................79
8.6.4 Installing an Optical Cable Between the SCU Boards in Different Subracks with a Long Distance........................82
8.6.5 Installing the Optical Cables Between the AOUa/AOUc/GOUa/GOUc/GOUe/POUa/POUc/UOIa/UOIc Boards and
the Other Equipment...........................................................................................................................................................87
8.7 Installing the EMU RS485 Communication Cables.....................................................................................................90
8.8 Connecting the GPS Surge Protector to the GCGa/GCGb Board................................................................................92
9 Installing the Alarm Box and the Computer Serving as the LMT.....................................97
9.1 Installing the Computer Serving as the LMT...............................................................................................................98
9.2 Installing the Alarm Box..............................................................................................................................................98
10 Attaching the Engineering Labels to the Cables...............................................................100
10.1 Attaching the Engineering Labels to the Power Cables and PGND Cables.............................................................101
10.2 Attaching the Engineering Labels to the Signal Cables...........................................................................................101
11 Checklist for the Hardware Installation.............................................................................104
11.1 Checklist for BSC6900 Cable Installation................................................................................................................105
11.2 Checklist for the Installation of the BSC6900 GPS Antenna System......................................................................105
11.3 Checklist for the Installation of the LMT Computer and Alarm Box......................................................................105
11.4 Checklist for Field Cleanliness of BSC6900 Installation.........................................................................................105
12 Installation Records................................................................................................................106
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1 Change DescriptionThis section provides information about the changes in different document versions. There are
two types of changes, including function changes and editorial changes. Function changes refer
to changes in functions of a specific product version. Editorial changes refer to changes in
wording or addition of information that was not described in the earlier version.
01 (2015-03-25)
This issue does not include any changes.
Draft A (2015-01-15)
Compared with Issue 01 (2014-04-29) of V900R016C00, this issue does not include any
changes.
BSC6900 UMTS
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2 Tools Required for InstallationThe tools required for installing the BSC are tools for measuring, marking, drilling, and
fastening, small tools, auxiliary tools, instruments, and special tools.
NOTICE
Electronic devices are prone to electrostatic discharge (ESD). Wear an ESD wrist strap correctly
and touch only the edges of the boards, especially when dealing with components such as boards.
Table 2-1 lists the tools required for installation.
Table 2-1 Tools required for installation
Common Tools Measuring tools Long measuring tape, ruler (1 m), right angle,
industrial horizontal ruler, and plumb
Marking tools Marking pen or ink fountain
Drilling tools Percussion drill (Ф16 drill bit) and vacuum cleaner
Fastening tools M3-M6 straight screwdrivers
M3-M6 Phillips screwdrivers
Adjustable wrench
Socket wrenches M6, M8, M12, M14, M17, and M19
Double offset ring wrenches M6, M8, M12, M14,
M17, and M19
Long-arm wrench
Small tools Sharp-nose pliers, diagonal pliers, pliers, hand-held
electric drill, file, handsaw, crowbar, rubber mallet,
and claw hammer
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Auxiliary tools Tweezers, brush, bellows, paper knife, bellows,
soldering iron, solder wires, ladder, pallet truck, panel
lifter, heat gun, and electric outlet (with three 2-phase
sockets and three 3-phase sockets, rated current higher
than 15 A)
Meters Earth resistance tester, Ethernet cable tester, multimeter, 500 V
megohmmeter, optical multimeter, and optical power meter
Special tools ESD wrist strap, glove, wire stripper, clamp pincer, feeder cutter, SMB
crimping tool, RJ-45 crimping tool, and cable cutter
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3 Installation ProcessThe BSC6900 installation process includes the installation of the cabinet and its fittings, power
cables and PGND cables, OMUc boards , signal cables, LMT computers, and alarm boxes.
Prerequisites
l The equipment has been unpacked and accepted.
l The tools required for the installation are available.
Procedure
Step 1 Install the cabinet and its fittings. For details, see the N68E-22 Cabinet Installation Guide.
Step 2 Install the power cables and PGND cables.
If... Then...
The type of the cabinet is N68E-22 See 4 Installing Power Cables and PGND
Cables.
The type of the cabinet is N68E-21-N See the description of installing power cables and
PGND cables for the N68E-21-N cabinet in the
N68E-21-N Cabinet Installation Guide.
Step 3 Check and Set the Subrack DIP Switch. For details, see 5 Checking and Setting DIP Switcheson Subracks.
Step 4 Check the Power-On Performance. For details, see 6 Checking the Power-On Performanceof Cabinet.
Step 5 Install the OMU board. For details, see Installing the OMUc Boards.
Step 6 Optional: Install the SAU board. For details, see Installing the SAUc Boards.
Step 7 Install signal cables. For details, see 8 Installing the Signal Cables.
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NOTE
The same method is used to install signal cables in both the N68E-22 and N68E-21-N cabinets. This
document uses the N68E-22 cabinet as an example.
Step 8 Optional: Install the GPS antenna system. For details, see the GPS Satellite Antenna SystemQuick Installation Guide.
Step 9 Install the computer serving as the LMT and the alarm box. For details, see 9 Installing theAlarm Box and the Computer Serving as the LMT.
Step 10 Attach engineering labels to the cables. For details, see 10 Attaching the Engineering Labelsto the Cables.
Step 11 Check the installed hardware. For details, see 11 Checklist for the Hardware Installation.
----End
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4 Installing Power Cables and PGND CablesAbout This Chapter
This section describes how to install power cables and PGND cables between a cabinet and the
power distribution frame (PDF) ,and PGND cables between cabinets. For items and
specifications for checking the installation of the power cables and PGND cables, see 11.1
Checklist for BSC6900 Cable Installation.
4.1 Power Ca bles and PGND Cables to Be Installed
Power cables and PGND cables to be installed include external -48 V power cables for
cabinets, external RTN power cables for cabinets, external PGND cables for cabinets, and inter-
cabinet PGND cables.
4.2 Connections of Power Cables and PGND Cables
This section describes the connections of power cables and PGND cables between a BSC6900
cabinet and the PDF and the connections of inter-cabinet PGND cables.
4.3 Principles for Installing Power Cables and PGND Cables
This section describes the principles for installing power cables and PGND cables. When you
install power cables and PGND cables, follow the routing and binding principles.
4.4 Installing Power Cables and PGND Cables Between a BSC6900 Cabinet and the PDF
This section describes how to install power cables and PGND cables for BSC6900 cabinets in
both overhead cabling and underfloor cabling modes.
4.5 Installing the PGND Cables Between Adjacent Cabinets
This section describes how to connect the upper, middle, and lower parts of the PGND busbar
of one cabinet to those of its adjacent cabinet through PGND cables. PGND cables need to be
installed in adjacent cabinets only when they are installed in combined mode.
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4.1 Power Cables and PGND Cables to Be Installed
Power cables and PGND cables to be installed include external -48 V power cables for
cabinets, external RTN power cables for cabinets, external PGND cables for cabinets, and inter-
cabinet PGND cables.
Table 4-1lists the external power cables and PGND cables to be installed for each cabinet.
Table 4-1 Power cables and PGND cables to be installed
Item Color Cross-Sectional Area
(mm2)
AllowedBending Radius(mm)
ConnectorType/ Installation Position
ConnectorType/ Installation Position
Number
External
-48 V
power
cable for
the cabinet
Blue 25/35 30 OT
terminal/-48
V input on
the cabinet
OT
terminal/-48
V output on
the PDF
4
External
RTN
power
cable for
the cabinet
Black 25/35 30 OT terminal/
RTN input
on the
cabinet
OT terminal/
RTN output
on the PDF
4
External
PGND
cable
Green
and
yellow
25/35 30 OT terminal/
PGND input
on the
cabinet
OT terminal/
PGND
output on the
PDF
1
Inter-
cabinet
PGND
cable
Green
and
yellow
6 15 OT terminal/
PGND
busbar in the
cabinet
OT terminal/
PGND
busbar in the
cabinet
3
NOTE
The required length of power cables and PGND cables is specified in the site survey report. Cut an
appropriate length of cables and crimp terminals onsite.
l The colors of power cables and PGND cables must meet the customer requirements. Table 4-1 lists
only their default colors.
l Whether to use one-hole OT terminals or two-hole OT terminals for power cables and PGND cables
is determined based on customer requirements. Table 4-1 lists the one-hole OT terminals.
l For details about power cables, see Power Cables. For details about PGND cables, see PGND Cables.
NOTE
To facilitate the crimping of OT terminals, crimp them on the ground with hydraulic pliers, and then placethem in the installation positions.
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4.2 Connections of Power Cables and PGND Cables
This section describes the connections of power cables and PGND cables between a BSC6900cabinet and the PDF and the connections of inter-cabinet PGND cables.
Figure 4-1 shows the connections of cabinet power cables and PGND cables.
Figure 4-1 Connections of power cables and PGND cables
NOTE
In each cabinet, A1 and B1 form a pair of active and standby power supply ports, as do A3 and B3. As
shown in the preceding figure, to create a hot backup, connect ports A1 and A3 to one power supply group
in the PDF, and ports B1 and B3 to a different power supply group.
Connect the PGND cables for a cabinet to the nearest ground bar. If the PDF is located a great distance
from the cabinet (for example, they are not in the same equipment room), connect the PGND cables to the
nearest ground bar that is co-grounded with the PDF instead of connecting them directly to the PDF. In
this case, the methods of installing and routing PGND cables are the same as those of connecting PGND
cables directly to the PDF. In practice, PGND cables must be connected based on customer requirements.
4.3 Principles for Installing Power Cables and PGND
Cables
This section describes the principles for installing power cables and PGND cables. When you
install power cables and PGND cables, follow the routing and binding principles.
Minimum Bending Radius of Power Cables
Table 4-2 lists the requir ements for bending radius of power cables.
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Table 4-2 Bending radius of power cables
Cross-Sectional Area (mm2) Radius
25 50 mm or larger
35 55 mm or larger
Cable Layout Requirements
l Lay out power cables and PGND cables with future capacity expansion in mind.
l When laying out power cables and PGND cables, separate them from signal cables. Lay
out power cables along outer columns. When you lay out power cables and PGND cables
parallel to signal cables, the space between them must be at least 30 mm.
lThe bending radius of a cable must be five times larger than the diameter of the cable.
l When using the underfloor cabling mode, reserve a surplus length of power cable outside
the cable inlet of the power distribution box on the top of the cabinet. This facilitates the
installation of terminals. In addition, lay out cables flat on the top of the cabinet.
l When connecting power cables to the terminals on the power distribution box, lay out the
cables straightly and smoothly.
Cable Binding Requirements
l When binding power cables and PGND cables, separate them from signal cables.
l Keep a 200 mm space between cable ties.
l When using the underfloor cabling mode, route the power cables and PGND cables alongthe middle standing pillar on the front right side of the cabinet.
l Select the appropriate cable ties, either 150 mm or 300 mm according to the diameter and
number of cables.
l Bind the cable ties in the same direction. Cut any excess from the cable ties, cutting surfaces
smoothly without sharp edges.
4.4 Installing Power Cables and PGND Cables Between aBSC6900 Cabinet and the PDF
This section describes how to install power cables and PGND cables for BSC6900 cabinets in
both overhead cabling and underfloor cabling modes.
4.4.1 Installing Power Cables and PGND cable Between theBSC6900 and the PDF in Overhead Cabling Mode
This section describes how to install power cables and PGND cable between a cabinet and the
PDF in overhead cabling mode.
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Prerequisites
l The cabinet to be connected with power cables and PGND cable has been installed.
l On the PDF, the power distribution switches for the relevant output terminals have been
set to OFF.l All power distribution switches on the power distribution box have been set to OFF.
l Power cables and PGND cable are available.
l The materials required for the installation are available. The materials include cable ties,
wax strings, and PVC insulation tape.
l The tools required for the installation are available. These tools include a handsaw, a cable
cutter, a wrench, a Phillips screwdriver, a flat-head screwdriver, an electric Phillips
screwdriver (> 5 N•m = 44.25 lbf•in.), diagonal pliers, and hydraulic pliers.
Context
If you are using the overhead cabling mode, route the cables from the PDF through the upper
cable hole into the cable tray and then to the top of each cabinet along the cable tray. Figure
4-2 shows how to install power cables and PGND cable between a cabinet and the PDF in
overhead cabling mode.
Figure 4-2 Installing power cables and PGND cable in overhead cabling mode
Procedure
Step 1 Determine the length of each power cable and PGND cable by referring to the related engineeringdesign documents or by measuring the actual cabling route.
Step 2 Uncoil the power cable roll and the PGND cable roll onsite. Measure an appropriate length of cables with a measuring tape or other measuring tools. Then, cut the cables with a cable cutter
(KT35) or a handsaw with 0.8 mm of teeth space. When cutting the cables, leave sufficient slack.
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NOTICE
If you find the slack insufficient, replace the cables. Do not make connectors or solder joints.
Step 3 Attach temporary labels to both ends of the cables. The contents on these temporary labels arenot necessarily the same as those on the formal labels because they are only for easy
identification.
Step 4 Lay out power cables and PGND cable between a cabinet and the PDF. Routed the power cablesfrom the PDF through the upper cable hole into the cable tray and then to the top of each
cabinet along the cable tray.
NOTE
l If the space between a cable tray and the top of a cabinet exceeds 800 mm, use a cable ladder to facilitate
the cable layout.
l The bending radius of a cable must be five times larger than the diameter of the cable.
Step 5 Connect the power cables and PGND cable for the cabinet.
1. According to the installation position of each cable, determine the exact length required,
and cut off any excess.
2. Obtain the cable terminals delivered with the cabinet. For details, see Assembling the OT
Terminal and the Power Cable. Crimp the OT terminals of the power cable and OT terminals
of PGND cable for the cabinet.
NOTE
OT terminals (M6) are used for the -48 V and RTN power cables whereas OT terminals (M8) are
used for PGND cable on the cabinet side. The type of OT terminals used on the PDF side is determined by the actual situation.
NOTE
To facilitate the crimping of OT terminals, crimp them on the ground with hydraulic pliers, and then
place them in the installation positions.
3. Remove the left and right plastic cover plates from the top rear of the cabinet and cut holes
on the cover plates, matching the holes to the power cable inlets on the power distribution
box.
4. Place both cover plates back to their original positions.
5. Through the hole on the cover plate on the top of the cabinet, connect OT terminals of the
-48 V power cable to wiring terminals labeled "3(-)" and "1(-)" in both part A and part Bof the power distribution box, and connect OT terminals of the RTN power cable to wiring
terminals labeled "3(+)" and "1(+)" in both part A and part B of the power distribution box.
6. Connect the OT terminals of the -48 V power cable and RTN power cable to the wiring
terminals in the power distribution box. .
7. Secure the OT terminal of PGND cableto the ground bolt at the rear of the cabinet top.
Step 6 Connect power cables and PGND cable to the PDF output terminals.
1. According to the installation position of each cable, determine the exact length required,
and cut off any excess.
2. Obtain the cable terminals delivered with the cabinet. For details, see Assembling the OT
Terminal and the Power Cable. Crimp the OT terminals of power cables and PGND cable.
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3. Connect the -48 V power cables, RTN power cables, and PGND cable to the corresponding
wiring terminals on the power distribution box.
NOTE
When connecting OT terminals to the wiring terminals, add flat washers and spring washers, and
assemble them in order.
Figure 4-3 shows how to install an OT terminal.
Figure 4-3 Installing an OT terminal
(1) Cable (2) Heat shrink tubing (3) Nut
(4) Spring washer (5) Flat washer (6) Wiring terminal
4. Record the installation results in 12 Installation Records.
----End
4.4.2 Installing Power Cables and PGND Cable Between theBSC6900 and the PDF in Underfloor Cabling Mode
This section describes how to install power cables and PGND Cable between a cabinet and the
PDF for the BSC6900 in underfloor cabling mode.
Prerequisites
l The cabinet to be connected with power cables and PGND Cable has been installed.
l On the PDF, the power distribution switches for the relevant output terminals have been
set to OFF.
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l All power distribution switches on the power distribution box have been set to OFF.
l Power cables and PGND Cable are available.
l The materials required for the installation are available. The materials include cable ties,
wax strings, PVC insulation tape, and lifting sling.
l The tools required for the installation are available. These tools include a handsaw, a cable
cutter, a wrench, a Phillips screwdriver, a flat-head screwdriver, an electric Phillips
screwdriver (> 5 N•m = 44.25 lbf•in.), diagonal pliers, and hydraulic pliers.
Context
If you are using the underfloor cabling mode, route the cables from the PDF through the cable
hole under the PDF, to the bottom of the cabinet beneath the ESD floor to the top of the cabinet
along the middle standing pillar. Figure 4-4Figure 4-5 shows how to install power cables and
PGND Cable between a cabinet and the PDF in underfloor cabling mode.
Figure 4-4 Installing power cables and PGND Cable in underfloor cabling mode
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Figure 4-5 Installing power cables and PGND Cable in underfloor cabling mode
Procedure
Step 1 Determine the length of each power cable and PGND cable by referring to the related engineeringdesign documents or by measuring the actual cabling route.
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Step 2 Uncoil the power cable roll and the PGND cable roll onsite. Measure an appropriate length of cables with a measuring tape or other measuring tools. Then, cut the cables with a cable cutter
(KT35) or a handsaw with 0.8 mm of teeth space. When cutting the cables, leave sufficient slack.
NOTICE
If you find the slack insufficient, replace the cables. Do not make connectors or solder joints.
Step 3 Attach temporary labels to both ends of the cables. The contents on these temporary labels arenot necessarily the same as those on the formal labels because they are only for easy
identification.
Step 4 Lay out power cables and PGND Cable according to cable routing and engineering requirements.
1. Route four pairs of power cables and one PGND cable from the cable outlet at the bottomof the PDF. Then route the cables under the ESD floor for the cabinet.
2. Divide the four pairs of power cables into two groups . Use a temporary cable tie to bind
one group with the PGND cable. Repeat this procedure with the other group. Route the two
groups of cables to the middle standing pillars on the left and right sides of the cabinet,
respectively.
3. Place one end of the lifting sling on the top of the middle standing pillar. Route the other
end of the lifting sling to the bottom of the cabinet through the middle standing pillar, and
bind it to the power cables and PGND cable at the bottom of the middle standing pillar.
4. Pull the upper end of the lifting sling to lift the power cables and PGND cable to the top of
the cabinet along the middle standing pillar.
5. Remove the lifting sling and the temporary cable ties on the power cables and PGND cable.
Step 5 Connect power cables and the PGND cable to the cabinet.
1. According to the installation position of each cable, determine the exact length required,
and cut off any excess.
2. Obtain the cable terminals delivered with the cabinet. For details, see Assembling the OT
Terminal and the Power Cable. Crimp the OT terminals of the power cable and OT terminals
of the PGND cable for the cabinet.
NOTE
OT terminals (M6) are used for the -48 V and RTN power cables on the cabinet side. OT terminals
(M8) are used for PGND Cable. The type of OT terminals used on the PDF side is determined by theactual situation.
To facilitate the crimping of OT terminals, crimp them on the ground with hydraulic pliers, and then
place them in the installation positions.
3. Remove the left and right plastic cover plates from the top rear of the cabinet and cut holes
on the cover plates, matching the holes to the power cable inlets on the power distribution
box.
4. Place both cover plates back to their original positions.
5. Through the hole on the cover plate on the top of the cabinet, connect OT terminals of the
-48 V power cable to wiring terminals labeled "3(-)" and "1(-)" in both part A and part B
of the power distribution box, and connect OT terminals of the RTN power cable to wiring
terminals labeled "3(+)" and "1(+)" in both part A and part B of the power distribution box.
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6. Connect the OT terminals of the -48 V power cable and RTN power cable to the wiring
terminals in the power distribution box. .
7. Secure the OT terminals of PGND Cable to the ground bolt at the rear of the cabinet top.
Step 6 Connect power cables and PGND Cable to the PDF output terminals.1. According to the installation position of each cable, determine the exact length required,
and cut off any excess.
2. Obtain the cable terminals delivered with the cabinet. For details, see Assembling the OT
Terminal and the Power Cable. Crimp the OT terminals of power cables and PGND Cable.
3. Connect the -48 V power cables, RTN power cables, and PGND Cable to the corresponding
wiring terminals on the power distribution box.
NOTE
When connecting OT terminals to the wiring terminals, add flat washers and spring washers, and
assemble them in order.
Figure 4-6 shows how to install an OT terminal.
Figure 4-6 Installing an OT terminal
(1) Cable (2) Heat shrink tubing (3) Nut
(4) Spring washer (5) Flat washer (6) Wiring terminal
4. Record the installation results in 12 Installation Records.
----End
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4.5 Installing the PGND Cables Between Adjacent Cabinets
This section describes how to connect the upper, middle, and lower parts of the PGND busbar
of one cabinet to those of its adjacent cabinet through PGND cables. PGND cables need to be
installed in adjacent cabinets only when they are installed in combined mode.
Prerequisites
The power distribution switches for the relevant output terminals have been set to OFF.
Procedure
Step 1 As described in 4.2 Connections of Power Cables and PGND Cables, use inter-cabinet PGNDcables to connect the upper, middle, and lower PGND busbars on the mounting bar of adjacent
cabinets as shown in Figure 4-7.
Figure 4-7 Installing PGND cables for adjacent cabinets
----End
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Follow-up Procedure
Record the installation results in 12 Installation Records.
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5 Checking and Setting DIP Switches onSubracks
This section describes how to check and set the DIP switch on a subrack. In general, subracks
are installed in the cabinet before delivery.
Prerequisites
Subracks have been installed in the cabinet.
Context
NOTICE
l Wear an ESD wrist strap and connect it to the ESD connector on the cabinet before performing
any operations. For details, see Wearing an ESD Wrist Strap.
l DIP switches cannot be set after the cabinet is powered on. Therefore, check and set the DIP
switches before powering on the cabinet.
The DIP switch is used to set the subrack number. Figure 5-1 shows the cover of a DIP
switch.
Figure 5-1 DIP switch cover
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The bit 0 indicates the ON state, and the bit 1 indicates the OFF state. The most significant bit
(MSB) of the DIP switch corresponds to the MSB of a byte. Table 5-1 provides the definition
of each bit.
Table 5-1 Definition of each DIP bit
DIP Bit Definition
1 (the least significant bit) Subrack number setting bit
2 Subrack number setting bit
3 Subrack number setting bit
4 Subrack number setting bit
5 Subrack number setting bit
6 Odd parity check bit
7 Reserved bit, generally set to ON
8 (the most significant bit) Startup type of the subrack, generally set to
OFF
NOTE
l For the inventory sites upgrading from
BSC6000 to BSC6900, keep the former
settings.
l For the new sites in BSC6900, the bit is
conservative and is fixed to OFF.
The DIP switch uses odd parity check, so the number of bits that are set to OFF must be odd.
The setting is as follows:
1. Set bit 1 to bit 5.
2. Set bit 7 to ON.
3. Set bit 8 to OFF.
4. Count the number of bits that are set to OFF.
l
If the number of bits is even, set bit 6 to OFF.l If the number of bits is odd, set bit 6 to ON.
Table 5-2 lists the DIP switch setting.
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Table 5-2 DIP switch setting
SubrackNo.
DIP Bit DIP SwitchSetting
1 2 3 4 5 6 7 8
0 0 0 0 0 0 0 0 1
ON ON ON ON ON ON ON OFF
1 1 0 0 0 0 1 0 1
OFF ON ON ON ON OFF ON OFF
2 0 1 0 0 0 1 0 1
ON OFF ON ON ON OFF ON OFF
3 1 1 0 0 0 0 0 1
OFF OFF ON ON ON ON ON OFF
4 0 0 1 0 0 1 0 1
ON ON OF
F
ON ON OFF ON OFF
5 1 0 1 0 0 0 0 1
OFF ON OF
F
ON ON ON ON OFF
Procedure
Step 1 Loosen the screws on the cover of the DIP switch by turning them counterclockwise for two or three circles, as shown in Figure 5-1.
Step 2 Turn the cover around the lower right screw and open the cover. Set the DIP switch.
Step 3 Attach a formal label or temporary label to the subrack. The contents on the temporary label arenot necessarily the same as those on the formal labels because they are used for identifying a
subrack during BSC6900 software commissioning.
----End
Follow-up Procedure
Record the checking and setting results of the DIP switch in 12 Installation Records.
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6 Checking the Power-On Performance ofCabinet
This section describes how to check the power supply to cabinets, fan assembly, and boards.
Prerequisites
l Power cables and PGND cables between a cabinet and the PDF are installed.
l Subracks, fan assemblies, and boards are installed.
l A multimeter required for the installation is available.
Context
The cabinet uses a DC power supply. For details, see Technical Specifications of the Power
Distribution Box.
NOTICE
Wear an ESD wrist strap and connect it to the ESD connector on the cabinet before performing
any operations.
You need not to remove the board for performing the power-on check. During powering on a
subrack, do not insert a board into or remove a board from the subrack to avoid static damageto boards.
Procedure
Step 1 Set the corresponding output switches on the PDF and all the output switches on the power distribution box to OFF.
Step 2 Use the multimeter to measure the resistance at the power output terminal for the PDF and atthe input and output terminals for the power distribution box. Ensure that short-circuiting does
not occur either between the -48 V working power and the RTN working ground or between the
-48 V working power and the PGND protection ground.
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Step 3 Set the output switches on the PDF to ON and all the output switches on the power distribution box to OFF.
Then, the power distribution box starts self-check. (The RUN and ALM indicators on the power
distribution box are on and the buzzer sounds.) After the self-check, the power distribution box
requests registering at the SCUb board (the RUN indicator on the power distribution box blinksat 2 Hz) until the registration is successful (the RUN indicator blinks at 0.5 Hz). For details about
the indicators on the power distribution box, see Indicators on the Power Distribution Box.
Step 4 Set the multimeter to the voltage scale. Use the multimeter to measure the output voltage of thePDF or the input voltage of the power distribution box. Ensure that the voltages range from -40
V to -57 V.
Step 5 Set the corresponding two switches on the power distribution box to ON.
Step 6 Set the multimeter to the voltage scale. Use the multimeter to check whether the output power provided by the power distribution box for each subrack ranges from -40 V to -57 V. Check
whether the fan assembly in the subrack can be normally started and whether the power supply
to the boards in the subrack is normal.
l If a subrack is powered on and started normally, the green STATUS indicator on the panel
of the fan assembly blinks. If exceptions occur, turn off the switches on the power distribution
box and the PDF immediately. Check whether the output voltage of the power distribution
box is normal and the power cables are installed correctly. For details about the indicators
on the fan assembly, see Indicators on the Fan Assembly.
l If a subrack is powered on and started normally, the RUN indicator on the board panel is ON
or blinks. If all the indicators on a board are OFF, the board or its slot may be faulty. Contact
Huawei technical support to resolve this problem.
l If indicators on all the boards in a subrack are OFF, turn off the switches on the power
distribution box and the PDF immediately. Check whether the output voltage of the power distribution box is normal and the power cables are installed correctly.
Step 7 Repeat Step 5 to Step 6 to check the power supply to all the subracks in one cabinet.
Step 8 Repeat Step 1 to Step 7 to measure the power supply to each cabinet.
----End
Follow-up Procedure
Record the power-on check results in 12 Installation Records. Set the corresponding output
switches on the PDF and all the output switches on the power distribution box to OFF.
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7 Installing and Setting BoardsAbout This Chapter
Most boards except the OMUa/OMUc/SAUa/SAUc boards are installed in subracks before the
delivery. If AEUa/AOUa/PEUa/PEUc/POUa/PAMU/PFCU boards are installed in the cabinet,
check and set the DIP switches of the boards. Install the OMUa/OMUc/SAUa/SAUc boards
onsite.
7.1 Safety Pr ecautions for Board Installation
This section describes the precautions you must take when you install, remove, or replace the
boards, or perform any other operation that requires bodily contact with the boards.
7.2 Installing the OMUa/OMUc/SAUa/SAUc Boards
This section describes how to install the OMUa/OMUc/SAUa/SAUc board in the MPS.
7.3 Checking and Setting the DIP Switch on the Board
The boards are installed in the subrack before delivery. If the AEUa/AOUa/PEUa/PEUc/
POUa /PAMU/PFCU board is configured in the cabinet, you need to check and set the DIP
switches of the AEUa/AOUa/PEUa/PEUc/POUa/PAMU/PFCU board.
7.4 DIP Switches on the BSC6900 Boards
This section describes the DIP switches on the BSC6900 AEUa/AOUa/PEUa/PEUc/POUa
boards and the PAMU/PFCU boards.
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7.1 Safety Precautions for Board Installation
This section describes the precautions you must take when you install, remove, or replace the boards, or perform any other operation that requires bodily contact with the boards.
Precautions Before Operation
l Store materials for board installation (such as ESD boxes and bags) in the equipment room
for future use.
l Keep the boards and other electrostatic-sensitive parts in ESD bags. Do not pack or hold
the boards or parts by using plastic foam, common plastic bags, or paper bags.
l Ensure that the cabinet is well grounded before inserting the board into the subrack.
Otherwise, the board mill be severely damaged.
l Ensure that the wrist strap is functioning. The value of the resistance measured by the
multimeter must range from 0.8 megohm to 1.2 megohms.
l see Wearing an ESD Wrist Strap for the method of measuring the resistance.
Precautions During Operation
l Wear an ESD wrist strap or gloves and ensure that the ESD wrist strap is well grounded.
l See Wearing an ESD Wrist Strap for the procedure for wearing an ESD wrist strap or gloves.
l Place the board on an ESD pad when replacing board hardware or chips. Use ESD tweezers
or extraction tools to replace chips. Do not touch board chips or pins with your bare hands.
l Discharge the static electricity of the cables and protective sleeves before connecting them
to the ports.
l Do not touch the PCB or any other part except jumpers and DIP switches during board
replacement.
l Place the removed boards and components on an ESD pad or other ESD materials. Do not
pack or hold the boards or parts by using plastic foam, common plastic bags, or paper bags.
7.2 Installing the OMUa/OMUc/SAUa/SAUc Boards
This section describes how to install the OMUa/OMUc/SAUa/SAUc board in the MPS.
Prerequisites
l The tools required for the installation are available. The tools include ESD wrist strap or
gloves and Phillips screwdriver.
l The boards to be installed are available.
Context
For the position of the OMUa/OMUc/SAUa/SAUc board in the subrack, see Configuration of
a Subrack and Principles for Installing Boards.
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Procedure
Step 1 Remove the board from the ESD box, and then check the pins and sockets of the board.
In case of any bent, missing or broken pins, or any deformed sockets, contact Huawei engineers
to replace the board.
Step 2 As shown in part a of Figure 7-1, press the self-locking latches on the front panel and turn theejector levers outwards until the ejector levers cannot be turned further. Check that the ejector
levers are located in the positions shown in part 2 of Figure 7-1.
Step 3 Hold the panel of the board with one hand and support the board with the other. Then, slide the board into the subrack along the guide rail until the ejector levers are half closed, as shown in
part 3 of Figure 7-1.
NOTICEWhen inserting the board into the subrack, push the board slowly and steadily to avoid damaging
the pins on the backplane and the metal piece on the board.
Figure 7-1 Installing the board
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Step 4 As shown in part 4 of Figure 7-1, turn the two ejector levers inwards at an angle of about 60°until they hook on to the self-locking latches on the front panel. Ensure that the board is in close
contact with the backplane and that the front panel is inserted into the subrack.
Step 5 Press and fasten the screws on the front panel to secure the board, as shown in part b of Figure7-1.
NOTE
The screws on the front panel have springs. Therefore, the screws can touch the corresponding holes of the
subrack only when you press the screws.
----End
Follow-up Procedure
Record the installation result in the templates provided in 12 Installation Records.
7.3 Checking and Setting the DIP Switch on the Board
The boards are installed in the subrack before delivery. If the AEUa/AOUa/PEUa/PEUc/
POUa /PAMU/PFCU board is configured in the cabinet, you need to check and set the DIP
switches of the AEUa/AOUa/PEUa/PEUc/POUa/PAMU/PFCU board.
Prerequisites
l The tools required for setting the DIP switches are available. The required tools are ESD
wrist strap, ESD gloves, ESD pad, ESD tweezers, Phillips screwdriver and flat-head
screwdriver.
l The DIP switches on the board are found.
l The actual transmission mode on site is determined.
Context
Before delivery, the DIP switches on the AEUa/AOUa/PEUa/PEUc/POUa/PAMU/PFCU board
are set by default. The settings of the DIP switches on the AEUa/AOUa/PEUa/PEUc/POUa/
PAMU/PFCU board should be checked according to the transmission mode used onsite and the
slots housing the boards. If the settings do not match the actual conditions, you need to adjust
the settings of the DIP switches.
The PFCU board is installed in the front of the fan box. Operators only need to pull the fan box
out of the subrack and check the DIP switches on the PFCU board.
NOTICE
Wear an ESD wrist strap and connect it to the ESD connector on the cabinet before you perform
the operation. For details, see Wearing an ESD Wrist Strap.
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Procedure
Step 1 Determine the position of the AEUa/AOUa/PEUa/PEUc/POUa/PAMU/PFCU board in thesubrack, and then remove any of the preceding board from the subrack. For details on how to
remove the AEUa/AOUa/PEUa/PEUc/POUa board, see Removing the Board. For details on
how to remove the PAMU board, see steps 3 to 6 in Replacing a PAMU Board. For details on
how to remove the PFCU board, see steps 2 to 4 in Replacing a Fan Assembly.
Step 2 Determine the proper settings of the DIP switches based on the board type, actual transmissionmode onsite, or the slot that housing the board.
Step 3 Check whether the settings of the DIP switches on the board match the actual conditions.
If... Then...
The settings of the DIP switches on the
board match the actual conditions
Do no modify the settings of the DIP switches.
Go to Step 5.
The settings of the DIP switches on the
board do not match the actual conditions
Modify the settings of the DIP switches by
performing Step 4.
Step 4 Wear the ESD gloves and place the board on the ESD pad. Then, use the tweezers to set thetarget DIP bits to the correct positions with moderate force.
l For details about the settings of the DIP switches on the AEUa board, see DIP Switches on
the AEUa Board.
l For details about the settings of the DIP switches on the AOUa board, see DIP Switches on
the AOUa Board.
l For details about the settings of the DIP switches on the PEUa board, see DIP Switches on
the PEUa Board.
l For details about the settings of the DIP switches on the PEUc board, see DIP Switches on
the PEUc Board.
l For details about the settings of the DIP switches on the POUa board, see DIP Switches on
the POUa Board.
l For details about the settings of the DIP switches on the PFCU board, see DIP Switch on the
PFCU Board.
l For details about the settings of the DIP switches on the PAMU board, see DIP Switch on
the PAMU Board.
Step 5 Install the board in its original slot. For details on how to install the AEUa/AOUa/PEUa/PEUc/POUa boards, see Installing the Board. For details on how to install the PAMU board, see steps
7 to 12 in Replacing a PAMU Board. For details on how to install the PFCU board, see steps 5
to 7 in Replacing a Fan Assembly.
Step 6 Check and set all the DIP switches on the board by repeating steps Step 1 to Step 5.
----End
Follow-up Procedure
Record the checking and setting results of the DIP switches on the AEUa/AOUa/PEUa/PEUc/
POUa/PAMU/PFCU board in the templates provided in 12 Installation Records.
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7.4 DIP Switches on the BSC6900 Boards
This section describes the DIP switches on the BSC6900 AEUa/AOUa/PEUa/PEUc/POUa
boards and the PAMU/PFCU boards.
Table 7-1 DIP Switches on BSC Components
DIP Switches onBSC Components
Description
DIP Switch on the
AEUa Board
For details, see BSC6900 Hardware DescriptionDIP Switches on
the AEUa Board
DIP Switch on the
AOUa Board
For details, see BSC6900 Hardware DescriptionDIP Switches on
the AOUa Board
DIP Switch on the
PEUa Board
For details, see BSC6900 Hardware DescriptionDIP Switches on
the PEUa Board
DIP Switch on the
PEUc Board
For details, see BSC6900 Hardware DescriptionDIP Switches on
the PEUc Board
DIP Switch on the
POUa Board
For details, see BSC6900 Hardware DescriptionDIP Switches on
the POUa Board
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8 Installing the Signal CablesAbout This Chapter
This chapter describes how to install the signal cables according to the layout requirements. The
signal cables to be installed include clock signal cables, Ethernet cables, E1/T1 cables and optical
cables. For items and specifications for checking the installation of signal cables, see 11.1
Checklist for BSC6900 Cable Installation.
8.1 Signal Ca bles to Be Installed
This section describes the signal cables to be installed on site.
8.2 Principles of Installing Signal CablesThis section describes principles of installing signal cables. The principles involve minimum
bending radius, cable layout, cable routing, and cable binding.
8.3 Installing the Clock Signal Cables
The clock signal cables refer to the Y-shaped clock signal cable, line clock signal cable and the
BITS clock signal cable.
8.4 Installing the Ethernet Cables
This section describes how to install the Ethernet cables. These cables are the inter-SCUa cable,
the Ethernet cable between the OMUa/OMUc board and the U2000 or the LAN of the customer,
and the Ethernet cable between the FG2a/FG2c board and the other device.
8.5 Installing the E1/T1 CablesThis section describes how to install the E1/T1 cables between the AEUa/PEUa/PEUc board
and the DDF.
8.6 Installing the Optical Cables
This section describes how to install the optical cables between the AOUa/AOUc/GOUa/GOUc/
GOUe/POUa/POUc/UOIa/UOIc board and the other equipment.
8.7 Installing the EMU RS485 Communication Cables
This section describes how to install the EMU RS485 communication cable between the
BSC6900 and the EMU.
8.8 Connecting the GPS Surge Protector to the GCGa/GCGb Board
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For cabinets equipped with the GCGa/GCGb board, install an indoor surge protector on the top
of the cabinet. Use the cable for the input of the satellite signals to connect the port Protect of
the GPS surge protector on the top of the cabinet and the port ANT on the GCGa/GCGb board.
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8.1 Signal Cables to Be Installed
This section describes the signal cables to be installed on site.
Table 8-1 lists the signal cables to be installed.
Table 8-1 Signal cables
Name Cable Type Function Remarks
Clock
signal
cables
Y-shaped clock
cable
Connects the GCUa/
GCGa/GCUb/GCGb
board to the SCUb board.
BSC6900 uses the BITS clock
cables to transmit the reference
clock signals extracted from the
BITS clock source, see 8.3
Installing the Clock Signal
Cables.
Line clock
signal cable
Connects the BSC6900
interface board to theGCUa/GCGa/GCUb/
GCGb board.
BITS clock
signal cable
Connects the GCUa/
GCGa/GCUb/GCGb
board to the BITS clock.
Ethernet
cable
Unshielded
straight-
through cable
Connects the SCUb boards
in the main BM and TC
subracks.
When the capacity of a site is
expanded, the inter-SCUb cables
need to be made and installed on
site, see Installing the Inter-
SCUb SFP+ High-Speed CablesBetween Different Subracks.
NOTE
GE ports numbered from 0 to 7 are
recommended for the
interconnection between SCUb
boards.
Shielded
straight-
through cable
Connects the OMUc/
SAUc board to the U2000
or the LAN of the
customer.
The shielded straight-through
cables are made before delivery.
Connects the FG2a/FG2c
board to other devices.
E1/T1
cable
75-ohm coaxial
cable
Connects the AEUa/PEUa/
PEUc board to the DDF.
The coaxial cables or twisted
pair cables are selected
according to the site survey, see
8.5 Installing the E1/T1
Cables.
Active/standby
75-ohm coaxial
cable
120-ohm
twisted pair
cable
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Name Cable Type Function Remarks
Active/standby
120-ohm
twisted pair cable
Optical
cable
LC/PC-LC/PC
single-mode/
multimode
optical cable or
LC/PC-FC/PC
single-mode/
multimode
optical cable or
LC/PC-SC/PC
single-mode/multimode
optical cable
Connects the AOUa/
AOUc/GOUa/GOUc/
GOUe/POUa/POUc/
UOIa/UOIc board to the
ODF.
The single-mode optical cables
are yellow, and the multimode
optical cables are orange, see 8.6
Installing the Optical Cables.
High-
speed
cable
SFP+ high-
speed cable
Connects SCUb boards in
different subracks.
When a new site is deployed, the
inter-SCUb cables are already
installed on the MPR cabinet
configured with two or three
subracks or the TCR cabinet.
When the capacity of a site is
expanded, the inter-SCUb cables
need to be made and installed on
site, see Installing the Inter-
SCUb SFP+ High-Speed Cables
Between Different Subracks.
NOTE
10GE ports numbered from 8 to 11
are recommended for the
interconnection between SCUb
boards.
Other
signal
cables
EMU RS485
communicatio
n cable
Connects the power
distribution box to the
EMU.
The crossover cables are made
before delivery.
Signal cable of
the alarm box
Connects the alarm box to
the Local Maintenance
Terminal (LMT) PC.
The crossover cables are made
before delivery.
For details about the signal cables, see Cables.
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8.2 Principles of Installing Signal Cables
This section describes principles of installing signal cables. The principles involve minimum bending radius, cable layout, cable routing, and cable binding.
Principles of Installing Signal Cables
When installing signal cables, take the following precautions:
l Optical cables should not be stretched roughly or stepped on, and heavy objects should not
be placed on the cable to avoid damage.
l Optical connectors not in use must be covered with a dustproof cap.
l If connectors of signal cables are made before delivery, pack the connectors with soft and
durable materials such as a packing bag during cabling.
l Protect jackets of signal cables from being damaged during the routing.
l When coiling the extra length of optical cables on the fiber management tray, apply proper
force to avoid damaging the optical.
l The actual installation positions must meet the requirements of site survey and data
configur ation.
l When installing the signal cables, you should route the extra length of the interconnection
cables on both sides of the cabinet according to the requirement for the bending radius of
the cables.
lThe related operation guide is intended for only the installation method. The actualinstallation position of cables should meet the requirements of site survey and should be
consistent with the data configuration scheme.
Minimum Bending Radius
The bending radius of the signal cable meets the requirements of all types of cables. Table
8-2 lists the bending radius of the signal cables.
Table 8-2 Requirements for the bending radius
Wire Bending Radius
BITS clock signal cable Not less than 45 mm
Y-shaped clock cable Not less than 25 mm
Ethernet cable Not less than 25 mm
Optical cable Not less than 40 mm
SFP+ high-speed cable Not less than 40 mm
E1/T1 cable Not less than 40 mm
EMU RS485 Communication Cable Not less than 25 mm
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Wire Bending Radius
OMUc serial cable
NOTE
The port does not require a signal cableor connection to other devices when the
system runs properly. Therefore,
equipment security is not affected.
Not less than 25 mm
Signal cable of the alarm box Not less than 25 mm
Principles of Routing the Signal Cables
To facilitate maintenance and capacity expansion, follow these principles when routing cables.
The layout sequence in over head and underfloor cabling modes must be the same.
l The cables can be routed either on the front side first or on the rear side first. The cables
meant for the front of the cabinet must be laid only in the front side of the cabinet. Follow
the same principle for the cables meant for the rear of the cabinet.
l whereas routing the cables at the back of the cabinet, you should route the E1/T1 cables
before routing the optical cables.
Requirements of Routing the Signal Cables
The requirements for routing signal cables are as follows:
l Protect the jackets of the signal cables from being damaged during the routing.
l Hold the connector when plugging out the signal cables to protect the signal cable from
damage.
l When installing the signal cables, you should route the extra length of the interconnection
cables on both sides of the cabinet according to the requirement for the bending radius of
the cables.
l For combined cabinets, the extra signal cable in front of the cabinet should be routed along
the cable ladder or at one side of the cabinet. It should not be placed in the gap between the
combined cabinets.
l
The signal cables must be separated from the power cables.l The bending radius of the signal cable satisfies the requirements of all kinds of cables.
Table 8-2 lists the bending radius of the signal cables.
l Extra length of the signal cable should be reserved near the connector.
l The signal cables must be neatly laid in the rack, according to the engineering design.
l If the height difference between the cable tray and the top of the cabinet exceeds 800 mm,
a vertical cable ladder must be used. The signal cables and the lower part of the downward
cable ladder must be bound together.
l The routing should be in accordance with the engineering design.
l The cabling is clear, proper, and smooth at the bends. The cables are laid in parallel.
l The signal cables layout facilitates maintenance and future expansion.
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Requirements of Binding the Signal Cables
The requirements of binding the signal cables are as follows:
l The signal cables and power cables must be bound separately. The spacing between cable
ties must be at least 150 mm.
l The twine for binding the cables must be coated with wax.
l The signal cables must be bound at the entrance and exit of the cable trough and at the
turning points, as shown in Figure 8-1.
Figure 8-1 Bending and binding signal cables
l The optical cables must be neatly bound in pairs.
l The cables on the cable tray must be bound neatly.
l The cable ties must face the same direction and be tied with proper tightness.
l The cable ties must be placed at regular intervals, 200 mm for E1/T1 cables , and 150 mm
for optical cables.
l The extra length of the cable ties must be cut and the cut surface must be smooth.
8.3 Installing the Clock Signal Cables
The clock signal cables refer to the Y-shaped clock signal cable, line clock signal cable and the
BITS clock signal cable.
8.3.1 Installing the Y-Shaped Clock Cables
This section describes how to install the Y-shaped clock cables between the GCUa/GCUb/
GCGa/GCGb board in the MPS and the SCUa/SCUb board in the EPS. When a new site is
deployed, the Y-shaped clock cables are already installed on the MPR cabinet configured with
two or three subracks. When the capacity of a site is expanded, the Y-shaped clock cables need
to be installed on site.
Prerequisites
l The Y-shaped clock cables required for the installation are available.
l The required cable ties and wax strings are available.
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l The tools required for the installation are available. The tools are ESD gloves or ESD wrist
strap, and cable cutter.
l The wires in the Y-shaped clock cables are intact, the jacket of the cable is undamaged,
and the pins in the connector are straight.
Context
NOTICE
Wear an ESD wrist strap and connect it to the ESD connector on the cabinet before you perform
the operation. For details, see Wearing an ESD Wrist Strap.
For the installation positions of the Y-shaped clock cables in the cabinet, see Connections of Signal Cables for the MPR.
The Y-shaped clock cable has three specifications in length: 2.0 m, 2.5 m, and 9.7 m. The 2.0
m cable is used to connect the GCUa/GCUb/GCGa/GCGb board to the SCUa/SCUb board in
two adjacent subracks in one cabinet. The 2.5 m cable is used to connect the GCUa/GCUb/
GCGa/GCGb board to the SCUa/SCUb board in different subracks in one cabinet. The 9.7 m
cable is used to connect the GCUa/GCUb/GCGa/GCGb board to the SCUa/SCUb board in
different cabinets.
Procedure
Step 1 Attach formal labels to identify the signal cables of the same type when the number of signalcables of the same type to be installed is more than one.
Step 2 Put one end with an RJ45 connector to the SCUa/SCUb board. Take one end of the cable thathas two RJ45 connectors and lead it from the SCUa/SCUb board to the distribution post in the
cable trough. Estimate the length of the cable between the SCUa/SCUb board and the GCUa/
GCUb/GCGa/GCGb board. The bending radius must be at least 25 mm. Then, bind the cable
and the distribution post. Route the cable along the cable trough to the GCUa/GCUb/GCGa/
GCGb board.
Step 3 Route the cable to the GCUa/GCUb/GCGa/GCGb according to the requirements specified in
8.2 Principles of Installing Signal Cables and the engineering requirements. The cabling of the Y-shaped clock cables is described in Table 8-3.
Table 8-3 Cabling of the Y-shaped clock cables
Condition Cabling mode Action
The SCUa/SCUb and the
GCUa/GCUb/GCGa/GCGb
are located in the same
cabinet.
Cabling within the cabinet Lead the optical cables to the
GCUa/GCUb/GCGa/GCGb
board through the cable
trough beneath the MPS
along the column of the
cabinet.
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