Huawei Technologies RU3260 Remote Radio Unit User Manual Installation Guide

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Date Submitted	2014-10-02 00:00:00
Date Available	2014-10-02 00:00:00
Creation Date	2014-09-17 16:58:56
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Document Title	Installation Guide
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Document Author:	Huawei Technologies Co.,Ltd.

RU3260
Installation Guide
Issue
05
Date
2014-06-30
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2014. 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:
support@huawei.com
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About This Document
About This Document
Purpose
This document describes the process of installing a DC blade RU3260 (referred to as RU in
this document).
Product Versions
The following table lists the product versions related to this document.
Product Name
Solution Version
Product Version
DBS3900
SRAN6.0 and later versions
V100R004C00 and later
versions
eRAN2.1 and later versions
V100R003C00 and later
versions
Intended Audience
This document is intended for:
Base station installation engineers
Organization
1 Changes in the RU3260 Installation Guide
This chapter describes the changes in the RU3260 Installation Guide.
2 Installation Preparations
This chapter describes the reference documents, tools, and instruments that must be ready
before the installation. In addition, it specifies the skills and prerequisites that installation
engineers must have.
3 Information About the Installation
Before installing an RU, you must be familiar with its exterior, ports, indicators, installation
options and installation clearance requirements.
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About This Document
4 Unpacking the Equipment
This chapter describes how to unpack and check the delivered equipment to ensure that all the
materials are included and intact.
5 Installation Process
The installation process involves installing an RU and RU cables, checking the RU hardware
installation, and powering on the RU.
6 (Optional) Installing the Plastic Shells of the RU
This section describes the procedure for installing the plastic shells of the RU.
7 Hoisting an RU and Related Cables onto a Tower
This section describes the procedure for hoisting an RU and related cables onto a tower and
the precautions that must be taken.
8 Installing the RU
This chapter describes the procedure for installing the RU. The procedure for installing the
RU varies depending on installation options.
9 Installing RU Cables
This chapter describes the procedure for installing RU cables.
10 Checking the RU Hardware Installation
After an RU is installed, check the hardware installation.
11 Powering On an RU
After all the devices are installed, check the power-on status of an RU.
12 Appendix
This section describes the procedure for adding an easy power receptacle (pressfit type)
connector.
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.
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About This Document
Symbol
Description
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
Convention
Description
Times New Roman
Normal paragraphs are in Times New Roman.
Boldface
Names of files, directories, folders, and users are in
boldface. For example, log in as user root.
Italic
Book titles are in italics.
Courier New
Terminal display is in Courier New.
Command Conventions
Convention
Description
Boldface
The keywords of a command line are in boldface.
Italic
Command arguments are in italics.
[]
Items (keywords or arguments) in square brackets [ ] are
optional.
{ x | y | ... }
Alternative items are grouped in braces and separated by
vertical bars. One is selected.
[ x | y | ... ]
Optional alternative items are grouped in square brackets
and separated by vertical bars. One or none is selected.
{ x | y | ... } *
Alternative items are grouped in braces and separated by
vertical bars. A minimum of one or a maximum of all can
be selected.
GUI Conventions
Convention
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About This Document
Convention
Description
Boldface
Buttons, menus, parameters, tabs, windows, 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 Operation
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 Operation
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
Contents
About This Document .................................................................................................................... ii
1 Changes in the RU3260 Installation Guide .............................................................................. 1
2 Installation Preparations ............................................................................................................. 3
2.1 Reference Documents ................................................................................................................................................... 3
2.2 Tools and Instruments ................................................................................................................................................... 3
2.3 Skills and Requirements for Onsite Personnel .............................................................................................................. 5
3 Information About the Installation ........................................................................................... 6
3.1 RU Exterior................................................................................................................................................................... 6
3.2 RU Ports ....................................................................................................................................................................... 7
3.3 RU Indicators .............................................................................................................................................................. 10
3.4 Installation Scenarios .................................................................................................................................................. 11
3.5 Installation Clearance Requirements of an RU ........................................................................................................... 20
3.5.1 Clearance for a Single RU ....................................................................................................................................... 20
3.5.2 Clearances for Three or More RUs .......................................................................................................................... 24
3.5.3 Installation Spacing Between RUs........................................................................................................................... 28
4 Unpacking the Equipment ........................................................................................................ 31
5 Installation Process ..................................................................................................................... 33
6 (Optional) Installing the Plastic Shells of the RU ................................................................ 34
7 Hoisting an RU and Related Cables onto a Tower ............................................................... 36
7.1 Hoisting an RU onto a Tower ..................................................................................................................................... 36
7.2 Hoisting Fiber Optic Cables onto a Tower .................................................................................................................. 40
7.3 Hoisting Power Cables onto a Tower .......................................................................................................................... 43
8 Installing the RU ......................................................................................................................... 46
8.1 Mounting Kits for an RU ............................................................................................................................................ 46
8.2 Installing the RU on a Pole ......................................................................................................................................... 48
8.2.1 Installing a Single RU .............................................................................................................................................. 48
8.2.2 Installing Two RUs .................................................................................................................................................. 51
8.2.3 Installing Three or More RUs .................................................................................................................................. 55
8.3 Installing the RU on U-steel ....................................................................................................................................... 59
8.4 Installing the RU on Angle Steel ................................................................................................................................ 64
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Contents
8.5 Installing the RU on a Wall ......................................................................................................................................... 67
8.6 Installing an RU on an IFS06 ..................................................................................................................................... 73
9 Installing RU Cables .................................................................................................................. 80
9.1 Cabling Requirements ................................................................................................................................................ 81
9.2 Cable Connections ...................................................................................................................................................... 87
9.3 Installation Process ..................................................................................................................................................... 89
9.4 RU Cable List ............................................................................................................................................................. 90
9.5 Installing an RU PGND Cable .................................................................................................................................... 91
9.6 Installing an RU RF Jumper ....................................................................................................................................... 92
9.7 Installing an RU AISG Multi-Wire Cable and AISG Extension Cable ....................................................................... 96
9.8 Installing an RU Alarm Cable ..................................................................................................................................... 98
9.9 Opening the Cover Plate of an RU Cabling Cavity .................................................................................................... 99
9.10 Installing an RU Power Cable................................................................................................................................. 101
9.11 Installing a CPRI Fiber Optic Cable ....................................................................................................................... 103
9.12 Closing the Cover Plate of an RU Cabling Cavity .................................................................................................. 105
10 Checking the RU Hardware Installation ............................................................................ 108
11 Powering On an RU ................................................................................................................ 109
12 Appendix .................................................................................................................................. 111
12.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RU Power Cable on the RU Side ........................... 111
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1 Changes in the RU3260 Installation Guide
Changes in the RU3260 Installation Guide
This chapter describes the changes in the RU3260 Installation Guide.
05 (2014-06-30)
This is the fifth official release.
Compared with issue 04 (2013-12-30), this issue includes the following change:
Topic
Change Description
3.5.1 Clearance for a Single RU
Added the clearance for a single RU or
multiple RUs on the bitumen ground.
3.5.2 Clearances for Three or More RUs
9.8 Installing an RU Alarm Cable
Added notes under the procedure.
3.4 Installation Scenarios
Added restrictions on RU mounting kits in
assembled installation mode.
Compared with issue 04 (2013-12-30), this issue does not include any new information and no
information is deleted from this issue.
04 (2013-12-30)
This is the fourth official release.
Compared with issue 03 (2013-12-23), this issue includes the following change:
Topic
Change Description
3.4 Installation Scenarios
Modified the figure showing the U-steel
specifications.
Compared with issue 03 (2013-12-23), this issue does not include any new information and no
information is deleted from this issue.
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03 (2013-12-23)
This is the third official release.
Compared with issue 02 (2013-06-26), this issue includes the following change:
Topic
Change Description
7.1 Hoisting an RU onto a Tower
Optimized the procedure for hoisting an RU
onto a Tower.
Compared with issue 02 (2013-06-26), this issue does not include any new information and no
information is deleted from this issue.
02 (2013-06-26)
This is the second official release.
Compared with issue 01 (2013-04-28), this issue includes the following change:
Topic
Change Description
9.10 Installing an RU Power Cable
Added the power device DCDU-12B for the
RU.
Compared with issue 01 (2013-04-28), this issue does not include any new information and no
information is deleted from this issue.
01 (2013-04-28)
This is the first official release.
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2 Installation Preparations
Installation Preparations
About This Chapter
This chapter describes the reference documents, tools, and instruments that must be ready
before the installation. In addition, it specifies the skills and prerequisites that installation
engineers must have.
2.1 Reference Documents
Before the installation, you must be familiar with reference documents.
2.2 Tools and Instruments
You must prepare the following tools and instruments before the installation.
2.3 Skills and Requirements for Onsite Personnel
Onsite personnel must be qualified and trained. Before performing any operation, onsite
personnel must be familiar with correct operation methods and safety precautions.
2.1 Reference Documents
Before the installation, you must be familiar with reference documents.
The following reference documents are required during RU installation:

RU3260 Hardware Description

DBS3900 Installation Guide

OCB User Guide

OCB-01M User Guide
2.2 Tools and Instruments
You must prepare the following tools and instruments before the installation.
Hammer drill (a φ12 bit)
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Heat gun
Phillips screwdriver (M3 to
M6)
Flat-head screwdriver (M3 to
M6)
Rubber mallet
COAX crimping tool
Wire stripper
Utility knife
Cable cutter
Adjustable wrench (size ≥ 32
mm [1.26 in.])
Torque wrench
Size: 16 mm (0.63 in.) and
32 mm (1.26 in.)
Combination wrench
Size: 16 mm (0.63 in.) and
32 mm (1.26 in.)
Level
Torque screwdriver
Torque socket
5 mm
5 mm
(M3 to M6)
(M3 to M6)
Multimeter
Marker (diameter ≤ 10 mm
[0.39 in.])
Measuring tape
Inner hexagon wrench
Fixed pulley
Lifting sling
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5 mm
Hydraulic pliers
2.3 Skills and Requirements for Onsite Personnel
Onsite personnel must be qualified and trained. Before performing any operation, onsite
personnel must be familiar with correct operation methods and safety precautions.
Before the installation, pay attention to the following items:

The customer's technical engineers must be trained by Huawei and be familiar with the
proper installation and operation methods.

The number of onsite personnel depends on the engineering schedule and installation
environment. Generally, only three to five onsite personnel are necessary.
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3 Information About the Installation
Information About the Installation
About This Chapter
Before installing an RU, you must be familiar with its exterior, ports, indicators, installation
options and installation clearance requirements.
3.1 RU Exterior
This section describes the exterior and dimensions of an RU.
3.2 RU Ports
This section describes ports on the RU panels. An RU has a bottom panel, cabling cavity
panel, and indicator panel.
3.3 RU Indicators
This section describes six indicators on an RU. They indicate the running status.
3.4 Installation Scenarios
An RU can be installed on a pole, U-steel, angle steel, wall, or IFS06. Installation scenarios
must meet heat-dissipation and waterproofing requirements of the RU.
3.5 Installation Clearance Requirements of an RU
This section describes the requirements for the installation clearance of a single RU and
multiple RUs and the requirements for the installation spacing between RUs.
3.1 RU Exterior
This section describes the exterior and dimensions of an RU.
Figure 3-1 shows an RU.
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Figure 3-1 RU exterior
Figure 3-2 shows RU dimensions.
Figure 3-2 RU dimensions
3.2 RU Ports
This section describes ports on the RU panels. An RU has a bottom panel, cabling cavity
panel, and indicator panel.
Figure 3-3 shows the ports on the RU panels.
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Figure 3-3 Ports on the RU panels
Table 3-1 describes ports and indicators on the RU panels.
Table 3-1 Ports and indicators on the RU panels
Item
Silkscreen
Remarks
(1) Ports in the
cabling cavity
RTN(+)
Power supply socket
(2) Ports at the
bottom
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NEG(-)
CPRI0
Optical/electrical port 0, connected to the
BBU
CPRI1
Optical/electrical port 1, reserved
ANT_TX/RXA
TX/RX port A, supporting RET signal
transmission
ANT_RXC
RX port C
ANT_RXD Port
RX port D
ANT_TX/RXB
TX/RX port B
EXT_ALM
Alarm monitoring port used for monitoring
one RS485 signal and two dry contact
signals
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Item
(3) Indicators
Silkscreen
Remarks
RET
Communication port for the RET antenna,
supporting RET signal transmission
RUN
See 3.3 RU Indicators.
ALM
ACT
VSWR
CPRI0
CPRI1
The port for transmitting RET signals is determined by the software.
Table 3-2 describes how to use RF ports.
Table 3-2 Usage of RF ports
Product Version
TX/RX
Channe
Number
of Used
RF Ports
Usage
Remarks
DBS3900 LTE
V100R003C00 and
later versions
1x
2T4R
ANT_TX/RXA,
ANT_TX/RXB,
ANT_RXC, and
ANT_RXD are used
together for one sector,
with ANT_TX/RXA and
ANT_RXC combined and
ANT_TX/RXB and
ANT_RXD combined.
A single
sector
Figure 3-4 shows the recommended usage of the RF ports on an RU used for DBS3900 LTE
V100R003C00 and later versions.
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Figure 3-4 Recommended usage of the RF ports on an RU used for DBS3900 LTE
V100R003C00 and later versions
3.3 RU Indicators
This section describes six indicators on an RU. They indicate the running status.
For detailed positions of RU indicators, see 3.2 RU Ports.
Table 3-3 describes RU indicators.
Table 3-3 RU indicators
Indicator
Color
Status
Meaning
RUN
Green
Steady on
There is power supply, but the module is
faulty.
Steady off
There is no power supply, or the module is
faulty.
Blinking (on for
1s and off for 1s)
The board is functioning properly.
Blinking (on for
0.125s and off for
0.125s)
Software is being loaded to the module, or
the module is not started.
Steady on
Alarms are generated, and the module must
be replaced.
Blinking (on for
1s and off for 1s)
Alarms are generated. The alarms may be
caused by the faults on the related boards or
ports. Therefore, you need to locate the
fault before deciding whether to replace the
module.
ALM
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Red
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Indicator
ACT
VSWR
CPRI0
CPRI1
Color
Green
Red
Red or
green
Red or
green
Status
Meaning
Steady off
No alarm is generated.
Steady on
The module is running properly with TX
channels enabled or the software is being
loaded without RU running.
Blinking (on for
1s and off for 1s)
The module is running properly with TX
channels disabled.
Steady off
No Voltage Standing Wave Ratio (VSWR)
alarm is generated.
Blinking (on for
1s and off for 1s)
VSWR alarms are generated on the
ANT_TX/RXB port.
Steady on
VSWR alarms are generated on the
ANT_TX/RXA port.
Blinking (on for
0.125s and off for
0.125s)
VSWR alarms are generated on the
ANT_TX/RXA and ANT_TX/RXB ports.
Steady green
The CPRI link is functioning properly.
Steady red
An optical module fails to transmit or
receive signals because the optical module
is faulty or the fiber optic cable is broken.
Blinking red (on
for 1s and off for
1s)
The CPRI link is out of lock because of a
failure in clock lock between two modes or
mismatched data rates over CPRI ports.
Steady off
The optical module cannot be detected, or
the optical module is powered off.
Steady green
The CPRI link is functioning properly.
Steady red
An optical module fails to transmit or
receive signals because the optical module
is faulty or the fiber optic cable is broken.
Blinking red (on
for 1s and off for
1s)
The CPRI link is out of lock because of a
failure in clock lock between two modes or
mismatched data rates over CPRI ports.
Steady off
The optical module cannot be detected, or
the optical module is powered off.
3.4 Installation Scenarios
An RU can be installed on a pole, U-steel, angle steel, wall, or IFS06. Installation scenarios
must meet heat-dissipation and waterproofing requirements of the RU.
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Requirements for the Installation Scenarios
Application scenarios:
To ensure proper heat dissipation of the RU, the following requirements must be met:

The RU cannot be installed in an enclosed cabinet without a cooling system.

The RU cannot be installed in an enclosed camouflage box.

The RU cannot be installed in an enclosed equipment room without a cooling system.

When multiple RUs are installed in centralized mode, the minimum clearance
requirements must be met. For details about the minimum clearance requirements, see
3.5.2 Clearances for Three or More RUs and 3.5.3 Installation Spacing Between RUs.

RU mounting kits in assembled installation mode are not allowed in indoor scenarios.
If the RU is improperly installed, heat dissipation of the RU deteriorates and the RU may not
work properly, as shown in Figure 3-5.
Figure 3-5 Improperly installed RUs
Method of installation:

To ensure the heat dissipation of the RU and waterproofing of the ports at the bottom of
the RU, the vertical deviation angle of an RU must be less than or equal to 10 degrees, as
shown in Figure 3-6.

On a tower, an RU can be installed on a pole, angle steel, or U-steel. The side-mounted
installation mode (one side instead of the rear of an RU is mounted on the support) is
recommended for RUs on the main pole secured on a tower. This installation mode
allows multiple RUs to be installed next to each other at the same level on a pole. When
the horizontal distance between the main and auxiliary poles on a tower is equal to or
greater than 810 mm (23.62 in.), the side-mounted mode is recommended for installing
RUs on the auxiliary pole to meet the minimum clearance requirements. Otherwise, the
standard mode is recommended for installing RUs on the auxiliary pole.
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Figure 3-6 Requirements for the vertical deviation angle of an RU
(1) RU
(2) Installation support (pole, U-steel, angle steel, or wall)
Installing an RU on a Pole
Figure 3-7 shows the diameter of a pole for installing an RU.
Figure 3-7 Diameter of a pole

The diameter of a pole for installing an RU ranges from 60 mm (2.36 in.) to 114 mm (4.49
in.). The recommended diameter is 80 mm (3.15 in.).

When the diameter of a pole ranges from 60 mm (2.36 in.) to 76 mm (2.99 in.), a
maximum of three RUs can be installed on the pole and the side-mounted installation is
recommended.

Only a pole whose diameter ranges from 76 mm (2.99 in.) to 114 mm (4.49 in.) supports
more than three RUs.

The recommended thickness of the wall of a pole is 3.5 mm (0.14 in.) or above.
Figure 3-8 shows a single RU installed on a pole.
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Figure 3-8 A single RU installed on a pole
Figure 3-9 shows two RUs installed on a pole.
Figure 3-9 Two RUs installed on a pole
Installing an RU on U-steel
Figure 3-10 shows U-steel specifications.
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Figure 3-10 U-steel specifications
U-steel supports the standard or reverse installation of a single RU only.
Figure 3-11 shows an RU installed on U-steel.
Figure 3-11 RU installed on U-steel
Installing an RU on Angle Steel
Figure 3-12 shows angle steel specifications.
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Figure 3-12 Angle steel specifications
Angle steel supports the standard or reverse installation of a single RU only.
Figure 3-13 shows an RU installed on angle steel.
Figure 3-13 RU installed on angle steel
Installing an RU on a Wall
The wall for installing RUs must meet the following requirements:

For each RU, the wall must be able to bear a weight four times the RU's weight and the
bolts' pulling force of 1.25 kN (281.25 lbf) vertical to the wall.

Expansion anchor bolts must be tightened to 30 N·m (265.52 lbf·in.) so that the bolts
stay secured without damaging the wall.
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
It is recommended that the RU be installed on a wall in standard mode.

When RUs are installed on a wall in side-mounted mode, do not combine mounting
brackets for multiple RUs, as shown in Figure 3-14.
Figure 3-14 Correct installation of mounting brackets for multiple RUs installed on a wall in
side-mounted mode
Figure 3-15 shows an RU installed on a wall.
Figure 3-15 RU installed on a wall
Installing an RU on an IFS06
In an IFS06 scenario:

The upper and lower adjustable beams on an IFS06 can be moved up and down to fit for
heights of RUs.

The IFS06 supports at least three RUs when the ambient temperature is higher than or
equal to the lowest operating temperature of the RU and at least 5°C (41°F) lower than
the highest operating temperature of the RU. The IFS06 supports a maximum of six RUs
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when the ambient temperature is higher than or equal to the lowest operating temperature
of the RU and at least 10°C (50°F) lower than the highest operating temperature of the
RU.
For details about the operating temperature of the RU, see section "Technical Specifications of RUs" in
3900 Series Base Station Technical Description.
The mounting brackets for multiple RUs cannot be combined when the RUs are installed on
an IFS06, as shown in Figure 3-16.
Figure 3-16 Correct installation of mounting brackets for RUs installed on an IFS06
Figure 3-17 and Figure 3-18 show RUs installed on an IFS06.
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Figure 3-17 Three RUs installed on an IFS06
(1) Height-restricted scenario
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Figure 3-18 Six RUs installed on an IFS06
(1) Height-restricted scenario
(2) Height-unrestricted scenario
3.5 Installation Clearance Requirements of an RU
This section describes the requirements for the installation clearance of a single RU and
multiple RUs and the requirements for the installation spacing between RUs.
3.5.1 Clearance for a Single RU
This section describes the recommended and minimum clearance for a single RU.
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If an RU is installed on the bitumen ground, the RU must be at least 500 mm (700 mm or
more as recommended) away from the bitumen ground. The following describes the space
requirements for installing a single RU on the non-bitumen ground.

The recommended clearance ensures normal running and provides an appropriate space for
operation and maintenance (OM). If there is sufficient space, leave the recommended clearance after
installing the equipment.

The minimum clearance ensures normal running and heat dissipation, but OM activities such as
checking indicator status and opening the cabling cavity cannot be properly conducted. If the
installation space is restricted, leave the minimum clearance after installing the equipment.
Clearance for a Single RU in Standard or Reverse Mode
Figure 3-19 shows the clearance for a single RU in standard or reverse mode.
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Figure 3-19 Clearance for a single RU in standard or reverse mode
Clearance for a Single RU in Side-Mounted Mode
Figure 3-20 shows the clearance for a single RU in side-mounted mode.
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Figure 3-20 Clearance for a single RU in side-mounted mode
Clearance for a Single Tower-mounted RU
Figure 3-21 and Figure 3-22 show the clearance for a single tower-mounted RU in standard or
reverse mode and in side-mounted mode, respectively.
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Figure 3-21 Minimum clearance for a single tower-mounted RU in standard or reverse mode
Figure 3-22 Minimum clearance for a single tower-mounted RU in side-mounted mode
3.5.2 Clearances for Three or More RUs
This section describes the recommended and minimum clearances for three or more RUs.
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If an RU is installed on the bitumen ground, the RU must be at least 500 mm (700 mm or
more as recommended) away from the bitumen ground. The following describes the space
requirements for installing multiple RUs on the non-bitumen ground.

The recommended clearances ensure normal running and provide an appropriate space for operation
and maintenance (OM). If there is sufficient space, retain the recommended clearances.

The minimum clearances ensure normal running and heat dissipation but do not allow OM activities
such as checking indicator status and opening the cabling cavity. If the installation space is
insufficient, retain the minimum clearances after the installation.
Recommended Clearances for Three or More RUs Installed on a Pole
Figure 3-23 shows the recommended clearances for multiple RUs installed in centralized
mode.
Figure 3-23 Recommended clearances for three or more RUs installed on a pole
Minimum Clearances for Three or More RUs Installed on a Pole
Figure 3-24 shows the minimum clearances for multiple RUs installed in centralized mode.
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Figure 3-24 Minimum clearances for three or more RUs installed on a pole
Recommended Clearances for Three or More RUs Installed on a Wall in
Standard Mode
Figure 3-25 shows the recommended clearances for multiple RUs installed on a wall in
standard mode.
Figure 3-25 Recommended clearances for three or more RUs installed on a wall in standard mode
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Minimum Clearances for Three or More RUs Installed on a Wall in Standard
Mode
Figure 3-26 shows the minimum clearances for three or more RUs installed on a wall in
standard mode.
Figure 3-26 Minimum clearances for three or more RUs installed on a wall in standard mode
Recommended Clearances for Three or More RUs Installed on a Wall in
Side-Mounted Mode
Figure 3-27 shows the recommended clearances for three or more RUs side-mounted on a
wall.
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Figure 3-27 Recommended clearances for three or more RUs installed on a wall in side-mounted
mode
3.5.3 Installation Spacing Between RUs
This section describes the horizontal and vertical spacing between RUs.
Recommended Horizontal Spacing Between RUs
Figure 3-28 shows the recommended horizontal spacing between RUs.
Figure 3-28 Recommended horizontal spacing between RUs
Minimum Horizontal Spacing Between RUs
Figure 3-29 shows the minimum horizontal spacing between RUs.
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Figure 3-29 Minimum horizontal spacing between RUs
Recommended Vertical Spacing Between RUs
Figure 3-30 shows the recommended vertical spacing between RUs.
Figure 3-30 Recommended vertical spacing between RUs
Minimum Vertical Spacing Between RUs
Figure 3-31 shows the minimum vertical spacing between RUs.
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Figure 3-31 Minimum vertical spacing between RUs
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4 Unpacking the Equipment
Unpacking the Equipment
This chapter describes how to unpack and check the delivered equipment to ensure that all the
materials are included and intact.
Context
When transporting, moving, or installing the equipment, components, or parts, you must:

Prevent them from colliding with doors, walls, shelves, or other objects.

Wear clean gloves, and avoid touching the equipment, components, or parts with bare hands,
sweat-soaked gloves, or dirty gloves.

After a cabinet or an BBU is unpacked, it must be powered on within 7 days.

After an RU is unpacked, it must be powered on within 24 hours.
Procedure
Step 1 Check the total number of articles in each case according to the packing list.
If ...
Then ...
The total number tallies with the
packing list
Go to Step 2.
The total number does not tally with
the packing list
Find out the cause and report any missing
articles to the local Huawei office.
Step 2 Check the exterior of the packing case.
If ...
Then ...
The outer packing is intact
Go to Step 3.
The outer packing is severely
damaged or soaked
Find out the cause and report it to the local
Huawei office.
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4 Unpacking the Equipment
Step 3 Check the type and quantity of the equipment in the cases according to the packing list.
If ...
Then ...
Types and quantity of the article tally
with those on the packing list
Sign the Packing List with the customer.
Either shipment shortage, wrong
shipment or damaged articles.
Report to the local Huawei office.

To protect the equipment and prevent damage to the equipment, you are advised to keep
the unpacked equipment and packing materials indoors, take photos of the stocking
environment, packing case or carton, packing materials, and any rusted or eroded
equipment, and then file the photos.

Verify that the insulation layers of all RU cables are intact. If the insulation layers are
damaged or broken, water will penetrate into the cables, which may cause damages to RUs
or human injury.
----End
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5 Installation Process
Installation Process
The installation process involves installing an RU and RU cables, checking the RU hardware
installation, and powering on the RU.
Figure 5-1 shows the process of installing an RU.
Figure 5-1 Process of installing an RU
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6 (Optional) Installing the Plastic Shells of the RU
(Optional) Installing the Plastic Shells of
the RU
This section describes the procedure for installing the plastic shells of the RU.
Context
An RU is equipped with a plastic shell only when necessary.
Procedure
Step 1 Use an M6 Phillips screwdriver to loosen the two screws on the metal sheet of the RU and
remove the metal sheet, as shown in Figure 6-1.
Figure 6-1 Removing the metal sheet
(1) Screw
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6 (Optional) Installing the Plastic Shells of the RU
Step 2 Install a buckle on each side at the bottom of the RU, and use an M4 torque wrench to tighten
the screws on the buckles to 1.4 N·m (12.39 lbf·in.), as shown in Figure 6-2.
Figure 6-2 Installing buckles at the bottom
(1) Buckle
(2) Screw
Step 3 Use four hex screws to secure the plastic shells onto the RU and use an M6 hex key wrench to
tighten the screws to 2.8 N·m (24.78 lbf·in.), as shown in Figure 6-3.
Figure 6-3 Installing the plastic shells of the RU
----End
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7 Hoisting an RU and Related Cables onto a Tower
Hoisting an RU and Related Cables onto a
Tower
About This Chapter
This section describes the procedure for hoisting an RU and related cables onto a tower and
the precautions that must be taken.
7.1 Hoisting an RU onto a Tower
This section describes the procedures and precautions for hoisting an RU and its mounting
kits onto a tower. In tower-mounted scenarios, the RU can be installed on a pole, U-steel, or
angle steel.
7.2 Hoisting Fiber Optic Cables onto a Tower
This section describes the procedure for hoisting fiber optic cables onto a tower and the
precautions that must be taken.
7.3 Hoisting Power Cables onto a Tower
This section describes the procedure for hoisting power cables onto a tower and the
precautions that must be taken.
7.1 Hoisting an RU onto a Tower
This section describes the procedures and precautions for hoisting an RU and its mounting
kits onto a tower. In tower-mounted scenarios, the RU can be installed on a pole, U-steel, or
angle steel.
Prerequisites
When the RU is powered by an AC/DC power module, you need to install the AC/DC power
module onto the RU before hoisting them onto a tower. For detailed operations, see AC/DC
Power Module User Guide or OPM15M User Guide.
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
Place a foam pad or cardboard on the ground to protect the housing of the RU from
damage before the binding. Do not stand the RU upright because the RF ports cannot
support the weight of the RU.

The routing and protection of power cables should follow the local safety regulations,
industry standards, and enterprise standards of the operator.
Procedure
Step 1 After climbing up to the tower, technician A secures the fixed pulley to the tower platform
support and leads the lifting sling through the fixed pulley.
Step 2 Technician C binds the mounting kits using the lifting sling and traction sling on the ground,
as shown in Figure 7-1. Then technician B pulls the lifting sling downwards, and technician C
pulls the traction sling outwards to protect the mounting kits from colliding with the tower.
Figure 7-1 Binding mounting kits for the RU
(1) Lifting sling
(2) Traction sling
Step 3 Technician A catches the mounting kits and then unties the slings.
Step 4 Install the mounting kits. For detailed operations, see steps 1 to 3 in 8.2.1 Installing a Single
RU.
Step 5 Technician C binds the RU using the lifting sling and traction sling, as shown in Figure 7-2.
The binding methods in Figure 7-3 and Figure 7-4 are incorrect.
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Figure 7-2 Binding the RU
(1) Handle
(2) Lifting sling
(3) Traction eye
(4) Traction sling
Figure 7-3 Incorrect binding method (1)
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Figure 7-4 Incorrect binding method (2)
Step 6 Hoist the RU onto the tower, as shown in Figure 7-5. Technician B pulls the lifting sling
downwards, and technician C pulls the traction sling outwards to protect the RU from
colliding with the tower.
Figure 7-5 Hoisting the RU onto the tower
(1) Lifting sling
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
The load-bearing capacity of each sling must be greater than 200 kg (441 lb) and the
diameter of each sling must be less than 25 mm (0.98 in.).

When hoisting each device onto a tower, protect them from colliding with the tower.

Hoist the RU onto the tower before it is installed on a pole, angle steel, or U-steel.

Do not hoist any thing by the traction eye.
Step 7 Technician A catches the RU hoisted onto the tower.
Step 8 Technician A installs the RU onto the main bracket and uses an inner hexagon torque
screwdriver to tighten the captive screw into the hole of the attachment plate and main bracket
to 5 N·m (44.25 lbf·in.). For detailed operations, see steps 4 and 5 in 8.2.1 Installing a Single
RU.
Step 9 Untie the lifting sling and traction sling.
The procedure for hoisting the RU and its mounting kits onto the tower is for your reference only.
----End
7.2 Hoisting Fiber Optic Cables onto a Tower
This section describes the procedure for hoisting fiber optic cables onto a tower and the
precautions that must be taken.
Context
Cabling requirements for power cables are met. For details, see 9.1 Cabling Requirements.
Procedure
Step 1 Hoist the fiber optic cables onto the tower, as shown in Figure 7-6.
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Figure 7-6 Hoisting fiber optic cables onto the tower
(1) Lifting sling
(2) Fixed pulley
(3) Traction sling
Before hoisting fiber optic cables onto the tower, connect the fiber optic cables to the RU or
BBU based on the labels on both ends of the cables and determine the hoisting direction.
1.
After climbing up to the tower, installation engineer A secures the fixed pulley to the
tower platform support and leads the lifting sling through the fixed pulley.
2.
Installation engineer B places the fiber coiler for coiling fiber optic cables on the fiber
spools, and installation engineer D lead the lifting sling through the stretch sling of the
fiber optic cables and use the other sling as a traction sling to secure the cables 4 m
(13.12 ft) away from the lifting sling, as shown in Figure 7-7.
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Figure 7-7 Binding fiber optic cables
(1) Lifting sling
(2) Stretch sling
(3) Traction sling
Do not remove the stretch sling and protection pipe or bind fiber optic cables using one sling,
as shown in Figure 7-8.
Figure 7-8 Incorrect binding method
3.
Installation engineer B rotates the fiber spools at the speed of 5 m (16.4 ft) to 15 m
(49.21 ft) per minute to coil the fiber optic cables.
4.
Installation engineer C pulls the lifting sling downwards, and installation engineer D
pulls the traction sling outwards to protect the fiber optic cables from colliding with the
tower.
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Step 2 Secure the fiber optic cables to the tower vertically using cable clips.
Step 3 Remove the lifting sling, traction sling, and protection pipe.
The procedure for hoisting the fiber optic cables onto the tower is for your reference only.
----End
7.3 Hoisting Power Cables onto a Tower
This section describes the procedure for hoisting power cables onto a tower and the
precautions that must be taken.
Context
Cabling requirements for power cables are met. For details, see 9.1 Cabling Requirements.
The procedure for adding a connector to the RU power cable on the RU side is done under the
tower.
Procedure
Step 1 Hoist the power cables onto the tower, as shown in Figure 7-9.
Figure 7-9 Hoisting power cables onto the tower
(1) Lifting sling
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1.
After climbing up to the tower, installation engineer A secures the fixed pulley to the
tower platform support and leads the lifting sling through the fixed pulley.
2.
Installation engineer B secures three cable ties to the power cable connector, and then
secures the power cable to the lifting sling, as shown in Figure 7-10.
The connector on the power cable in the figure is only an example. The actual connector may vary
according to the situation.
Figure 7-10 Binding cable ties
3.
Installation engineer B wraps the power cable connector with a layer of PVC insulation
tape, as shown in Figure 7-11.
Wrap the PVC insulation tape from 30 mm (1.18 in.) away from one end of the connector until it reaches
the other end of the connector. The total length of the wrapped connector is 100 mm (3.94 in.).
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Figure 7-11 Wrapping the PVC insulation tape
4.
Installation engineer C pulls the lifting sling downwards, and installation engineer B
pulls the other end of the lifting sling outwards to protect the power cables from
colliding with the tower.
Step 2 Secure the power cables to the tower vertically using cable clips.
Step 3 Remove the cable ties, PVC insulation tape, and lifting sling.
The procedure for hoisting the power cables onto the tower is for your reference only.
----End
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8 Installing the RU
Installing the RU
About This Chapter
This chapter describes the procedure for installing the RU. The procedure for installing the
RU varies depending on installation options.
8.1 Mounting Kits for an RU
This section describes the bracket assembly and the attachment plate for an RU.
8.2 Installing the RU on a Pole
One or more RUs can be installed on a pole.
8.3 Installing the RU on U-steel
This section describes the procedure and precautions for installing the RU on U-steel. An RU
can be installed on U-steel secured on the ground or a tower. Each piece of U-steel allows
only one RU to be installed in standard or reverse mode.
8.4 Installing the RU on Angle Steel
This section describes the procedure and precautions for installing the RU on angle steel. An
RU can be installed on angle steel secured on the ground or a tower. Each piece of angle steel
allows only one RU to be installed in standard or reverse mode.
8.5 Installing the RU on a Wall
This section describes the procedure and precautions for installing the RU on a wall.
8.6 Installing an RU on an IFS06
This section describes the procedure and precautions for installing an RU on an IFS06.
8.1 Mounting Kits for an RU
This section describes the bracket assembly and the attachment plate for an RU.
Figure 8-1 shows the front and side of an RU.
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Figure 8-1 Front and side view of an RU
(1) Front view
(2) Side view
Figure 8-2 shows the bracket assembly for an RU.
Figure 8-2 12 L blade RU mounting kit
(1) Plastic cap
(2) Standard
M10 nut
(3) Spring
washer
(4) Thick flat
washer
(5) Square-neck
bolt
(6) Hoist clamp
on the main
bracket
(7) Main
bracket
(8) Inner
hexagon
screw
(9) Pole
installation
bracket
(10) Auxiliary
bracket
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8.2 Installing the RU on a Pole
One or more RUs can be installed on a pole.
8.2.1 Installing a Single RU
This section describes the procedure and precautions for installing a single RU on a pole.
Prerequisites
Before you install an RU on a pole secured on a tower, the RU and its mounting brackets are
hoisted onto the tower. For details, see 7.1 Hoisting an RU onto a Tower.
The hoist clamp on the main bracket is secured properly.

Do not stand the RU upright because the RF ports cannot support the weight of the RU.

Place a foam pad or cardboard under the RU to protect the RU housing from damage
during the installation.
Procedure
Step 1 Determine a position for installing the mounting brackets.

If the pole must be installed on a tower, determine a position for installing the mounting
brackets according to the instructions in 3.5.1 Clearance for a Single RU.

If the pole must be installed on the ground, determine a position for installing the
mounting brackets according to Figure 8-3.
Figure 8-3 Distance between the mounting brackets and the ground
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It is recommended that the mounting brackets be installed at a height of 1200 mm (47.24 in.) to 1600
mm (62.99 in.) above the ground.
Step 2 Install the RU mounting brackets, as shown in Figure 8-4.
Figure 8-4 Installing the RU mounting brackets
Verify that the arrows on the mounting brackets are pointing up.
1.
Adjust the position of the nut and remove one end of the square-neck bolt from the slot
on the auxiliary bracket.
2.
Slide the mounting brackets onto the pole horizontally and insert the square-neck bolt
into the slot.
Step 3 Use a 16 mm (0.63 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so
that the mounting brackets are secured onto the pole, as shown in Figure 8-5.
Tighten the nuts on the two square-neck bolts alternatively. After the main and auxiliary
brackets are secured properly, measure the spacing between the brackets on both sides and
ensure that the spacing is the same on the two sides.
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Figure 8-5 Securing the RU mounting brackets
Step 4 Install the RU onto the main bracket, as shown in Figure 8-6.
Figure 8-6 Installing the RU onto the main bracket
Step 5 Use an inner hexagon torque screwdriver to tighten the captive screw into the holes on the top
of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate
and main bracket are firmly secured, as shown in Figure 8-7.
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Figure 8-7 Securing the captive screw into the connection hole
----End
8.2.2 Installing Two RUs
This section describes the procedure and precautions for installing two RUs on a pole.
Prerequisites
The hoist clamp on the main bracket is secured properly.

Do not stand the RU upright because the RF ports cannot support the weight of the RU.

Place a foam pad or cardboard under the RU to protect the RU housing from damage
during the installation.
Procedure
Step 1 Install the first RU onto the main bracket, as shown in Figure 8-8. For details, see 8.2.1
Installing a Single RU.
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Figure 8-8 Installing the first RU onto the main bracket
Step 2 Use an M6 inner hexagon screwdriver to remove the four inner hexagon screws from the
second set of mounting brackets, and remove the main bracket from the auxiliary bracket, as
shown in Figure 8-9.
Figure 8-9 Removing the RU main bracket
(1) Main bracket
(2) Pole installation bracket
Step 3 Install the removed main bracket on one side of the first main bracket, as shown in Figure
8-10.
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The second main bracket must be installed with the opening ends of U-shaped slots on both
sides facing downwards.
Figure 8-10 Installing the second main bracket
(1) Removed main bracket
The main mounting bracket for installing a 12 L blade RU can connect to the main mounting bracket for
installing a common RU in the scenarios of adding RUs, as shown in Figure 8-11.
Figure 8-11 Connect to the main mounting bracket for installing a common RU
(1) Main mounting bracket for a 12 L blade
RU
(2) Main mounting bracket for a common
RU
Step 4 Install the second RU onto the main bracket, as shown in Figure 8-12.
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Figure 8-12 Installing the second RU onto the main bracket
After installing each RU on its main bracket, use an inner hexagon torque screwdriver to
tighten the captive screw into the holes of the attachment plate and main bracket to 5 N·m
(44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, as shown in
Figure 8-13.
Figure 8-13 Securing the captive screw into the connection hole
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Step 5 Install the metal sheet for neighboring RUs, as shown in Figure 8-14.
Figure 8-14 Installing the metal sheet
(1) Screw
(2) Metal sheet
1.
Use an M6 Phillips screwdriver to loosen the screw on the metal sheet farther from the
handle of the second RU and remove the screw.
2.
Use an M6 Phillips screwdriver to loosen the screw on the metal sheet closer to handle of
the second RU. Then rotate the metal sheet to align the vacant hole in the metal sheet
with a hole on the top of the first RU.
3.
Insert the removed screw into the hole on the top of the first RU and use an M6 torque
screwdriver to tighten the screw to 5 N·m (44.25 lbf·in.).
----End
8.2.3 Installing Three or More RUs
The section describes the procedure and precautions for installing three or more RUs on a
pole.
Prerequisites
The hoist clamp on the main bracket is secured properly.

Do not stand the RU upright because the RF ports cannot support the weight of the RU.

Place a foam pad or cardboard under the RU to protect the RU housing from damage
during the installation.
Context
A pole supports the installation of three, four, or six RUs. The procedures for installing them
are the same. Following is the procedure of installing four RUs on a pole.
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Procedure
Step 1 Install the two RUs, as shown in Figure 8-15. For details, see 8.2.2 Installing Two RUs.
Figure 8-15 Two RUs installed on a pole
Step 2 Use an M6 inner hexagon screwdriver to remove the four inner hexagon screws from the
second set of mounting brackets, and remove the main bracket from the auxiliary bracket, as
shown in Figure 8-16.
Figure 8-16 Removing the RU main bracket
(1) Main bracket
(2) Pole installation bracket
Step 3 Install the third main bracket and install the third RU onto the third main bracket. Then use an
inner hexagon torque screwdriver to tighten the captive screw into the connection holes on the
top of the attachment plate and main bracket for the RU, with a torque of 5 N·m (44.25
lbf·in.), as shown in Figure 8-17.
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The third main bracket must be installed with the opening ends of U-shaped slots on both
sides facing downwards.
Figure 8-17 Installing the third RU onto the third main bracket
The main mounting bracket for installing a 12 L blade RU can connect to the main mounting bracket for
installing a common RU in the scenarios of adding RUs, as shown in Figure 8-11.
Figure 8-18 Connect to the main mounting bracket for installing a common RU
(1) Main mounting bracket for a 12 L blade
RU
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Step 4 Install the metal sheet for neighboring RUs, as shown in Figure 8-19.
Figure 8-19 Installing the metal sheet
(1) Screw
(2) Metal sheet
1.
Use an M6 Phillips screwdriver to loosen the screw on the metal sheet farther from the
handle of the first RU and remove the screw.
2.
Use an M6 Phillips screwdriver to loosen the screw on the metal sheet closer to handle of
the first RU. Then rotate the metal sheet to align the vacant hole in the metal sheet with a
hole on the top of the third RU.
3.
Insert the removed screw into the hole on the top of the third RU and use an M6 torque
screwdriver to tighten the screw to 5 N·m (44.25 lbf·in.).
Step 5 Install the second set of RU mounting brackets above or below the first set of RU mounting
brackets and maintain a space equal to or greater than 80 mm (3.15 in.) between the two sets
of brackets, as shown in Figure 8-20.
Figure 8-20 Installing the second set of RU mounting brackets
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Step 6 Install the fourth RU onto the fourth main bracket, use an inner hexagon torque screwdriver to
tighten the captive screw into the holes of the attachment plate and main bracket to 5 N·m
(44.25 lbf·in.) so that the attachment plate and main bracket are firmly secured, as shown in
Figure 8-21.
Figure 8-21 Installing the fourth RU onto the fourth main bracket
----End
8.3 Installing the RU on U-steel
This section describes the procedure and precautions for installing the RU on U-steel. An RU
can be installed on U-steel secured on the ground or a tower. Each piece of U-steel allows
only one RU to be installed in standard or reverse mode.
Prerequisites
Before you install an RU on U-steel secured on a tower, the RU and its mounting brackets are
hoisted onto the tower. For details, see 7.1 Hoisting an RU onto a Tower.
The hoist clamp on the main bracket is secured properly.
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
Do not stand the RU upright because the RF ports cannot support the weight of the RU.

Place a foam pad or cardboard under the RU to protect the RU housing from damage
during the installation.
Context
Figure 8-22 shows the top view of the RU installed on U-steel.
When the width of the narrower edges of the U-steel is less than 40 mm (1.57 in.), only the a
and b modes are supported.
Figure 8-22 Top view of the RU
(1) U-steel
Procedure
Step 1 Determine a position for installing the mounting brackets.

If the RU must be installed on U-steel secured on a tower, see 3.5.1 Clearance for a
Single RU to determine a position.

If the RU must be installed on U-steel secured on the ground, see Figure 8-23 to
determine a position.
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Figure 8-23 Distance between the mounting brackets and the ground
It is recommended that the mounting brackets be installed at a height of 1200 mm (47.24 in.) to 1600
mm (62.99 in.) above the ground.
Step 2 Install the RU mounting brackets, as shown in Figure 8-24.
Figure 8-24 Installing the RU mounting brackets
Verify that the arrows on the mounting brackets are pointing up.
1.
Adjust the position of the nut and remove one end of the square-neck bolt from the slot
on the auxiliary bracket.
2.
Slide the mounting brackets onto the U-steel horizontally and insert the square-neck bolt
into the slot.
Step 3 Use a 16 mm (0.67 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so
that the mounting brackets are secured onto the U-steel, as shown in Figure 8-25.
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Tighten the nuts on the two square-neck bolts alternatively. After the main and auxiliary
brackets are secured properly, measure the spacing between the brackets on both sides and
ensure that the spacing is the same on the two sides.
Figure 8-25 Securing the RU mounting brackets
Step 4 Use an inner hexagon screwdriver to remove the attachment plate from one side of the RU,
reinstall the attachment plate onto the rear of the RU, and tighten the four stainless screws to 5
N·m (44.25 lbf·in.), as shown in Figure 8-26.
Figure 8-26 Installing the attachment plate onto the rear of the RU
Step 5 Install the RU onto the main bracket, as shown in Figure 8-27.
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Figure 8-27 Installing the RU onto the main bracket
Step 6 Use an inner hexagon screwdriver to tighten the captive screw into the holes on the top of the
attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and
main bracket are firmly secured, as shown in Figure 8-28.
Figure 8-28 Securing the captive screw into the connection hole
----End
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8.4 Installing the RU on Angle Steel
This section describes the procedure and precautions for installing the RU on angle steel. An
RU can be installed on angle steel secured on the ground or a tower. Each piece of angle steel
allows only one RU to be installed in standard or reverse mode.
Prerequisites
Before you install an RU on angle steel secured on a tower, the RU and its mounting brackets
are hoisted onto the tower. For details, see 7.1 Hoisting an RU onto a Tower.
The hoist clamp on the main bracket is secured properly.

Do not stand the RU upright because the RF ports cannot support the weight of the RU.

Place a foam pad or cardboard under the RU to protect the RU housing from damage
during the installation.
Context
Figure 8-29 shows the top view of the RU installed on angle steel.
Figure 8-29 Top view of the RU
(1) Angle steel
Procedure
Step 1 Determine a position for installing the mounting brackets.

If the RU must be installed on angle steel secured on a tower, see 3.5.1 Clearance for a
Single RU to determine a position.

If the RU must be installed on angle steel secured on the ground, see Figure 8-30 to
determine a position.
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Figure 8-30 Distance between the mounting brackets and the ground
It is recommended that the mounting brackets be installed at a height of 1200 mm (47.24 in.) to 1600
mm (62.99 in.) above the ground.
Step 2 Install the RU mounting brackets, as shown in Figure 8-31.
Figure 8-31 Installing the RU mounting brackets
Verify that the arrows on the mounting brackets are pointing up.
1.
Adjust the position of the nut and remove one end of the square-neck bolt from the slot
on the auxiliary bracket.
2.
Slide the mounting brackets onto the angle steel horizontally and insert the square-neck
bolt into the slot.
Step 3 Use a 16 mm (0.67 in.) M10 torque wrench to tighten the nuts to 40 N·m (354.03 lbf·in.) so
that the mounting brackets are secured onto the angle steel, as shown in Figure 8-32.
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Tighten the nuts on the two square-neck bolts alternatively. After the main and auxiliary
brackets are secured properly, measure the spacing between the brackets on both sides and
ensure that the spacing is the same on the two sides.
Figure 8-32 Securing the RU mounting brackets
Step 4 Use an inner hexagon screwdriver to remove the attachment plate from one side of the RU,
reinstall the attachment plate onto the rear of the RU, and tighten the four stainless screws to 5
N·m (44.25 lbf·in.), as shown in Figure 8-33.
Figure 8-33 Installing the attachment plate onto the rear of the RU
Step 5 Install the RU onto the main bracket, as shown in Figure 8-34.
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Figure 8-34 Installing the RU onto the main bracket
Step 6 Use an inner hexagon screwdriver to tighten the captive screw into the holes on the top of the
attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and
main bracket are firmly secured, as shown in Figure 8-35.
Figure 8-35 Securing the captive screw into the connection hole
----End
8.5 Installing the RU on a Wall
This section describes the procedure and precautions for installing the RU on a wall.
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Prerequisites
The hoist clamp on the main bracket is secured properly.

Do not stand the RU upright because the RF ports cannot support the weight of the RU.

Place a foam pad or cardboard under the RU to protect the RU housing from damage
during the installation.
Context
The wall on which RUs are installed must meet the following requirements:

For each RU, the wall must be able to bear a weight four times the RU's weight and the
bolts' pulling force of 1.25 kN (281.25 lbf) vertical to the wall.

Expansion anchor bolts must be tightened to 30 N·m (265.52 lbf·in.) so that the bolts
stay secured without damaging the wall.
Procedure
Step 1 Disassemble the RU mounting brackets, as shown in Figure 8-36.
Figure 8-36 Disassembling the mounting brackets
(1) Main
bracket
(2) Square-neck
bolt
(3) Pole installation
bracket
(4) Auxiliary
bracket
(5) Flat washer
(6) Spring washer
(7) Nut
(8) Plastic cap
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1.
Use an M6 inner hexagon torque screwdriver to remove the four inner hexagon screws
on the pole installation bracket, and remove the main bracket from the pole installation
bracket.
2.
Use an M10 torque wrench to loosen the nuts on the two square-neck bolts, and remove
the plastic cap, nuts, spring washers, flat washers, square-neck bolts, and pole
installation bracket from the auxiliary bracket.
Step 2 Place the pole installation bracket against the installation position, use a level to verify that
the pole installation bracket is placed horizontally, and then mark anchor points with a marker,
as shown in Figure 8-37.
Figure 8-37 Marking anchor points
(1) Level
(2) Pole installation bracket
(3) RU
It is recommended that the pole installation bracket be installed at a height of 1200 mm (47.24 in.) to
1600 mm (62.99 in.) above the ground.
Step 3 Drill holes at the anchor points, and then insert expansion anchor bolt assemblies, as shown in
Figure 8-38.
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Figure 8-38 Drilling a hole and inserting expansion anchor bolt assemblies
(1) M10x80 bolt
1.
(2) Nut
(3) Spring
washer
(4) Flat washer
(5) Expansion
tube
Use a hammer drill with a Ф12 bit to drill holes vertically at the marked anchor points.
Ensure that the depth of each hole ranges from 55 mm (2.17 in.) to 60 mm (2.36 in.).
Take proper safety measures to protect your eyes and respiratory tract against the dust before
drilling holes.
2.
Tighten the expansion anchor bolts slightly and place one vertically into each hole.
3.
Use a rubber mallet to pound the expansion anchor bolt until it goes all the way into the
hole.
4.
Tighten and then loosen the expansion bolt, and remove the M10 bolt, spring washer,
and flat washer in sequence.
After dismantling an expansion anchor bolt, ensure that the top of the expansion tube is on the
same level as the wall. Otherwise, the device cannot be installed on the wall evenly and
securely.
Step 4 Install the pole installation bracket on the expansion anchor bolts, place the flat washers,
spring washers, and nuts through the expansion anchor bolts in sequence, and then use a 16
mm (0.63 in.) torque socket to tighten the nuts to 30 N·m (265.52 lbf·in.), as shown in Figure
8-39.
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Figure 8-39 Installing the pole installation bracket on the expansion anchor bolts
Verify that the arrows on the pole installation bracket are pointing up.
Step 5 Install the main bracket onto the pole installation bracket, and use an inner hexagon
screwdriver to tighten four M6x16 inner hexagon screws to 5 N·m (44.25 lbf·in.) so that the
main bracket and pole installation bracket are firmly secured, as shown in Figure 8-40.
Figure 8-40 Installing the main bracket
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(1) Main bracket
(2) Pole installation bracket
Step 6 Use an inner hexagon screwdriver to remove the attachment plate from one side of the RU,
reinstall the attachment plate onto the rear of the RU, and tighten the four stainless screws to 5
N·m (44.25 lbf·in.), as shown in Figure 8-41.
Figure 8-41 Installing the attachment plate onto the rear of the RU
Step 7 Install the RU onto the main bracket, as shown in Figure 8-42.
Figure 8-42 Installing the RU onto the main bracket
Step 8 Use an inner hexagon screwdriver to tighten the captive screw into the holes on the top of the
attachment plate and main bracket to 5 N·m (44.25 lbf·in.) so that the attachment plate and
main bracket are firmly secured, as shown in Figure 8-43.
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Figure 8-43 Securing the captive screw into the connection hole
----End
8.6 Installing an RU on an IFS06
This section describes the procedure and precautions for installing an RU on an IFS06.
Prerequisites
The hoist clamp on the main bracket is secured properly.

Do not stand the RU upright because the RF ports cannot support the weight of the RU.

Place a foam pad or cardboard under the RU to protect the RU housing from damage
during the installation.
Context

The upper and lower adjustable beams on an IFS06 can be moved up and down to fit for
heights of RUs.

RUs can be installed on an IFS06 only when the ambient temperature is higher than or
equal to the lowest working temperature of the RU and at least 5°C (41°F) lower than the
highest working temperature of the RU. In this scenario, the IFS06 supports at least three
RUs. When the ambient temperature is higher than or equal to the lowest working
temperature of the RU and at least 10°C (50°F) lower than the highest working
temperature of the RU, the IFS06 supports a maximum of six RUs.
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For details about the operating temperature of the RU, see section "Technical Specifications of RUs" in
3900 Series Base Station Technical Description.

Install RUs in the sequence from bottom to top and from left to right.

This section describes how to install an RU in height-unrestricted scenarios. The
procedure for installing an RU in height-restricted scenarios is the same as that in
height-unrestricted scenarios.

When installing the pole installation bracket, you need to use the M10x50 bolts delivered
with the IFS06.

Rubber washers are easily compressed or broken, whereas do not need to be replaced.
Procedure
Step 1 Disassemble the RU mounting brackets, as shown in Figure 8-44.
Figure 8-44 Disassembling the mounting brackets
(1) Main
bracket
(2) Square-neck
bolt
(3) Pole installation
bracket
(4) Auxiliary
bracket
(5) Flat washer
(6) Spring washer
(7) Nut
(8) Plastic cap
1.
Use an M6 inner hexagon torque screwdriver to remove the four inner hexagon screws
on the pole installation bracket, and remove the main bracket from the pole installation
bracket.
2.
Use an M10 torque wrench to loosen the nuts on the two square-neck bolts, and remove
the plastic cap, nuts, spring washers, flat washers, square-neck bolts, and pole
installation bracket from the auxiliary bracket.
Step 2 Use the M10x50 bolts delivered with the IFS06 to secure the pole installation bracket to the
IFS06, and then use an M10 torque socket wrench to secure the bolts to 30 N·m (265.52
lbf·in.).
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Ensure that the arrows on the pole installation bracket are pointing up.

Height-restricted scenarios
Use one finger to push and remove the rubber plugs on the beam and then install the pole
installation bracket, as shown in Figure 8-45.
Figure 8-45 Installing the pole installation bracket in height-restricted scenarios
(1) Spring washer

(2) Rubber washer
Height-unrestricted scenarios
Install the pole installation bracket, as shown in Figure 8-46.
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Figure 8-46 Installing the pole installation bracket in height-unrestricted scenarios
(1) Spring washer
(2) Rubber washer
Step 3 Attach the main bracket to the pole installation bracket, and use an inner hexagon screwdriver
to tighten four M6x16 screws to 5 N·m (44.25 lbf·in.) so that the main bracket and pole
installation bracket are firmly secured, as shown in Figure 8-47.
Figure 8-47 Installing the main bracket
(1) Main bracket
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(2) Pole installation bracket
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Step 4 Attach the RU to the main bracket, and then use an inner hexagon screwdriver to tighten the
captive screw into the holes of the attachment plate and main bracket to 5 N·m (44.25 lbf·in.)
so that the attachment plate and main bracket are firmly secured, as shown in Figure 8-48.
Figure 8-48 Installing the RU onto the main bracket
Step 5 Install the RUs on the lower level from left to right, as shown in Figure 8-49.
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Figure 8-49 Installing RUs on the lower level
Step 6 Optional: When the ambient temperature is equal to or higher than the lowest operating
temperature of the RU and at least 10°C (10°F) lower than the highest operating temperature
of the RU, repeat the preceding steps to install the RUs on the higher level, as shown in
Figure 8-50.
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Figure 8-50 Installing RUs on the higher level
----End
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Installing RU Cables
About This Chapter
This chapter describes the procedure for installing RU cables.
9.1 Cabling Requirements
Cables must be routed according to the specified cabling requirements to prevent signal
interference.
9.2 Cable Connections
This section describes the cable connections for a single RU and multiple RUs.
9.3 Installation Process
This section describes the process of installing RU cables.
9.4 RU Cable List
This section describes RU cable connections.
9.5 Installing an RU PGND Cable
This section describes the procedure for installing an RU PGND cable.
9.6 Installing an RU RF Jumper
This section describes the procedure for installing an RU RF jumper.
9.7 Installing an RU AISG Multi-Wire Cable and AISG Extension Cable
This section describes the procedures for installing an RU AISG multi-wire cable and AISG
extension cable.
9.8 Installing an RU Alarm Cable
This section describes the procedure for installing an RU alarm cable.
9.9 Opening the Cover Plate of an RU Cabling Cavity
This section describes the procedure for opening the cover plate of an RU cabling cavity.
9.10 Installing an RU Power Cable
This section describes the procedure for installing an RU power cable.
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9.11 Installing a CPRI Fiber Optic Cable
This section describes the procedure for installing a CPRI fiber optic cable.
9.12 Closing the Cover Plate of an RU Cabling Cavity
This section describes the procedure for closing the cover plate of an RU cabling cavity.
9.1 Cabling Requirements
Cables must be routed according to the specified cabling requirements to prevent signal
interference.
If a cable listed below is not required, skip the routing requirements of the cable.
General Cabling Requirements
Requirements for Bending Radius

The bending radius of the 7/8'' feeder must be more than 250 mm (9.84 in.), and the
bending radius of the 5/4'' feeder must be more than 380 mm (14.96 in.).

The bending radius of the 1/4'' jumper must be more than 35 mm (1.38 in.). The bending
radius of the super-flexible 1/2'' jumper must be more than 50 mm (1.97 in.), and the
bending radius of the ordinary 1/2'' jumper must be more than 127 mm (5 in.).

The bending radius of the power cable or PGND cable must be at least three times the
diameter of the cable.

The bending radius of a fiber optic cable is at least 20 times the diameter of the fiber
optic cable, and the minimum bending radius of the breakout cable at each end of the
fiber optic cable is 30 mm (1.18 in.).

The bending radius of the E1/T1 cable must be at least three times the diameter of the
cable.

The bending radius of the signal cable must be at least five times the diameter of the
cable.
Requirements for Cable Binding

The same types of cable must be bound together.

Different types of cable must be separately routed with the minimum spacing of 30 mm
(1.18 in.) and cannot be entangled.

The cables must be bound tightly and neatly. The sheaths of the cables must not be
damaged.

Cable ties are installed in the same direction, and those at the same horizontal line must
be in a straight line.

The excess of indoor cable ties is trimmed off, and the excess of outdoor cable ties
allows about 5 mm (0.2 in.), without remaining rough edges.

Labels or nameplates must be attached to both ends, joints, or turns of cables after they
are installed.
Security Requirements

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Cables should be placed away from sharp objects or wall burrs. If these positions are
inevitable, protect the cables with protection pipes.
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
Cables must be routed away from heat sources, or heat-insulation materials are added
between cables and heat sources.

Sufficient slack (recommended for about 0.1 m [0.33 ft]) is provided in cables at turns or
the position close to a device, facilitating cable and device maintenance.
Indoor Cabling Requirements

Cables are routed indoors through the feeder window.

Drip loops must be made outside the feeder window, and the requirements for the
minimum bending radius are met.

When cables are routed indoors, engineers are required indoors for cooperation.

The feeder window must be waterproofed.
Outdoor Cabling Requirements

Cables routed outdoors must be led through a pipe when they may be damaged.

AC power cables, transmission cables, and cables buried in the ground must be
protected.

If cables at the cabinet bottom need to be routed through a pipe along the ground, lead
the pipe into the cabinet base for about 30 mm (1.18 in.) to 50 mm (1.97 in.), not into the
cabinet. Block the pipe with waterproof tape or silicon gel, and secure the pipe to the
cable hole at the cabinet bottom with metal piece.

If cables at the cabinet bottom need to be routed through a pipe along the metal cable
trough, do not lead the pipe into the cabinet base. The cable trough must be sealed and
routed through the cable hole at the cabinet bottom.

When routing RU cables, ensure that the highest positions of the routes of all RU cables
(except RF cables and AISG cables) must be lower than the bottom of the RU.

Cables are secured with cable clips.

Cables are routed neatly along the specified cabling direction and secured with cable
clips.

The positions for cable clips are determined onsite. For example, the cable clips for the
7/8" feeder are installed at the spacing of 1.5 m (4.92 ft) to 2 m (6.56 ft) in the same
direction, and the cable clips for the power cables are installed at the spacing of 1.5 m
(4.92 ft) to 2 m (6.56 ft) in the same direction.

Cable clips must be vertical with cables, and the cables in a cable clip must be parallel.

After routing cables neatly and correctly, tighten the screws on cable clips.
Secure cables on the cable tray, as shown in Figure 9-1.
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Figure 9-1 Securing cables on the cable tray
Secure cables on the tower, as shown in Figure 9-2.
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Figure 9-2 Securing cables on the tower
Special Cabling Requirements
Cabling Requirements for Power Cables

Power cables must be installed in the position specified in engineering design
documents.

If the length of power cables is insufficient, replace the cables rather than adding
connectors or soldering joints to lengthen the cables.

Cables must be routed by only qualified and trained personnel before all preparations are
made.

Cables are routed in an untangled and orderly fashion.

If DC power cables need to be routed on the tower platform, lay out the cables on the
guardrail with the shortest distance and route the cables along the guardrail.
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
If DC power cables need to be routed close to a device on the tower, secure the cables to
the guardrail or pole with cable clips. The device cannot be far away from the position
for securing the cables.
Cabling Requirements for PGND Cables

PGND cables for the base station must be connected to the same ground bar.

PGND cables must be buried in the ground or routed indoors. They should not be routed
overhead before they are led into the equipment room.

The exterior of the coaxial wire and the shield layer of the shielded cable must have
proper electrical contact with the metal surface of the equipment to which they are
connected.

PGND cables and signal cables must be installed in an untangled and orderly fashion. A
certain distance must be reserved between them to prevent interference from each other.

Fuses or switches must not be installed on the PGND cables.

Other devices must not be used for electrical connections of the PGND cables.

All the metal parts in the housing of the equipment must be reliably connected to the
ground terminal.
Cabling Requirements for E1 Cables

E1 cables must not cross power cables, PGND cables, or RF cables when routed. If
transmission cables are routed with power cables, PGND cables, or RF cables in parallel,
the spacing between them must be greater than 30 mm (1.18 in.).

E1 cables are routed straightly and bound neatly with cable ties.

Sufficient slack is provided in E1 cables at turns.

E1 cables cannot be squeezed by the cabinet door when routed through the cabinet, as
shown in Figure 9-3.
Figure 9-3 E1 cables routed through the cabinet
Cabling Requirements for Fiber Optic Cables

Fiber optic cables must be routed by at least three qualified and trained personnel before
all preparations are made.

Fiber optic cables are used within the temperature range of -40°C to 60°C. If the current
temperature is out of the range, make protection measures or route the cables again.

Cables are routed in an untangled and orderly fashion.

Do not bind fiber optic cables at turns.
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
Do not stretch, step on, or place heavy objects on fiber optic cables. Keep the cables
away from sharp objects.

When fiber optic cables are routed, the excess of the cables must be coiled around
special devices, such as a fiber coiler.

An unarmored fiber optic cable must be bound using binding straps. If a fiber optic patch
cord needs to be secured in a cabinet or a piece of equipment, use binding straps to bind
it and then use cable ties to secure the binding straps to the cabinet or equipment. Ensure
that the fiber optic cables can flexibly move in the cable ties. Do not bend the fiber optic
cables sharply. The following figure shows how to bind the fiber optic cables correctly.
Figure 9-4 Binding fiber optic cables

When coiling fiber optic cables, apply even strength. Do not bend the cables with force.

Vacant optical connectors must be covered with dustproof caps.

Fiber optic cables cannot be squeezed by the cabinet door when routed through the
cabinet, as shown in Figure 9-5, Figure 9-6 and Figure 9-7.
Figure 9-5 CPRI fiber optic cables routed through the cabinet (1)
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Figure 9-6 CPRI fiber optic cables routed through the cabinet (2)
Figure 9-7 FE/GE cables routed through the cabinet

If fiber optic cables need to be routed on the tower platform, lay out the cables on the
guardrail with the shortest distance and route the cables along the guardrail.

If fiber optic cables need to be routed close to a device on the tower, secure the cables to
the guardrail or pole with cable clips. The device cannot be far away from the position
for securing the cables.

If the fiber optic cables close to a device are too long, coil the excess of the cables and
secure them on the tower.
9.2 Cable Connections
This section describes the cable connections for a single RU and multiple RUs.

A lower-level RU obtains power directly from the external power system, but not from an
upper-level RU using a power cable.
Figure 9-8 shows the cable connections for a single RU.
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Figure 9-8 Cable connections for a single RU
(1) PGND cable
(2) RU RF jumper
(3) RU AISG multi-wire cable
(4) RU AISG extension cable
(5) RU power cable
(6) CPRI fiber optic cable
(7) RU alarm cable
Figure 9-9 shows the cable connections for multiple RUs.
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Figure 9-9 Cable connections for multiple RUs
(1) PGND cable
(2) RU RF jumper
(3) RU power cable
(4) CPRI fiber optic cable
9.3 Installation Process
This section describes the process of installing RU cables.
Figure 9-10 shows the process of installing RU cables.
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Figure 9-10 Process of installing RU cables
9.4 RU Cable List
This section describes RU cable connections.
Table 9-1 lists RU cables.
Table 9-1 RU cables
Cable
One End
The Other End
Connector
Installation
Position
Connector
Installation
Position
RU PGND
Cable
OT terminal
(M6, 16 mm2 or
0.025 in.2)
Ground
terminal on the
RU
OT terminal
(M8, 16 mm2 or
0.025 in.2)
Ground terminal
on the ground bar
RU Power
Cable
Tool-less female
connector
(pressfit type)
NEG(-) and
RTN(+) ports
on the RU
Depending on
the power supply
equipment
External power
equipment
RU Alarm
Cable
DB15
waterproof male
EXT_ALM
port on the RU
Cord end
terminal
External alarm
device
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Cable
One End
Connector
The Other End
Installation
Position
Connector
Installation
Position
connector
CPRI Fiber
Optic Cable
DLC connector
CPRI0 port on
the RU
DLC connector
CPRI port on a
board in the BBU
RU RF
Jumper
DIN male
connector
ANT_TX/RX
A,
ANT_TX/RX
B, ANT_RXC,
or ANT_RXD
port on the RU
DIN male
connector
Antenna system
RU AISG
Multi-Wire
Cable
DB9 waterproof
male connector
RET port on
the RU
Standard AISG
female connector
Standard AISG
male connector
on the RCU or on
the AISG
extension cable
RU AISG
Extension
Cable
Standard AISG
male connector
Standard AISG
female
connector on
the AISG
multi-wire
cable
Standard AISG
female connector
Standard AISG
male connector
on the RCU
9.5 Installing an RU PGND Cable
This section describes the procedure for installing an RU PGND cable.
Context
The cross-sectional area of an RU PGND cable is 16 mm2 (0.025 in.2). The cable has an M6
OT terminal at one end and an M8 terminal at the other end.
Procedure
Step 1 According to the actual cable route, cut the PGND cable into a proper length to prepare an RU
PGND cable. Then add an OT terminal at each end of the cable according to the instructions
in Assembling the OT Terminal and the Power Cable.
Step 2 Install the RU PGND cable.
Connect the M6 OT terminal at one end of the PGND cable to the ground terminal at the RU
bottom and the M8 OT terminal at the other end to the external ground bar, as shown in
Figure 9-11.
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Figure 9-11 Installing an RU PGND cable
Crimp OT terminals in correct positions, as shown in Figure 9-12.
Figure 9-12 Correct position of an OT terminal
Step 3 Label the installed cables according to the instructions in Attaching a Cable-Tying Label.
----End
9.6 Installing an RU RF Jumper
This section describes the procedure for installing an RU RF jumper.
Procedure
Step 1 Connect the DIN male connector at one end of the RU RF jumper to the ANT port on the RU,
and use a torque wrench to tighten the connector to 25 N·m (221.27 lbf·in.), as shown in
Figure 9-13.
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Figure 9-13 Installing an RU RF jumper
On AC-powered electric railways, such as high speed railways, when leaky cables are
connected to RUs installed in tunnels, high-voltage-resistance DC blocks must be installed
between RU RF jumpers and the leaky cables to protect the RUs against damage.
Step 2 Link the other end of the RF jumper to the external antenna system.
Step 3 Waterproof the connectors of the RF jumper by referring to Figure 9-14.
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Figure 9-14 Waterproofing a connector of the RF jumper
(1) Waterproof tape
(2) PVC insulation tape

Before wrapping waterproof tape, stretch the tape evenly until the length of the tape becomes twice
its original length.

Do not stretch the PVC insulation tape when wrapping the PVC insulation tape.

Wrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape
overlaps more than 50% of the preceding layer. Ensure that neighboring layers are stuck to each
other.

Ensure that the adhesive surface of the tape overlaps the lower layer.

When cutting off the cable ties, reserve a redundant length of 3 mm (0.12 in.) to 5 mm (0.2 in.).
1.
Wrap three layers of waterproof tape on the connector, first from bottom up, then from
top down, and finally from bottom up. Start wrapping the connector at a position 50 mm
(1.97 in.) away below the bottom of the connector to the top of the connector, first from
bottom up, then from top down, and finally from bottom up. Cut off the redundant tape
after three layers are wrapped. Wrap each layer of tape around the connector tightly.
2.
Wrap three layers of PVC insulation tape. Start the wrapping at a position 30 mm (1.18
in.) away below the bottom of the waterproof tape to the top of the connector, first from
bottom up, then from top down, and finally from bottom up. Cut off the redundant tape
after three layers are wrapped. Wrap each layer of tape around the connector tightly.
3.
Start binding cable ties to the cable at a position 3 mm (0.12 in.) to 5 mm (0.2 in.) away
from one end of the PVC insulation tape.
Step 4 Check the dustproof caps on antenna connectors. In outdoor scenarios, dustproof caps must be
waterproofed, as shown in Figure 9-15.
Do not remove dustproof caps from vacant antenna connectors.
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Figure 9-15 Waterproofing a dustproof cap
(1) Dustproof cap
(2) Waterproof tape
(3) PVC insulation tape

Before wrapping waterproof tape, stretch the tape evenly until the length of the tape becomes twice
its original length.

Do not stretch the PVC insulation tape when wrapping the PVC insulation tape.

Wrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape
overlaps more than 50% of the preceding layer. Ensure that neighboring layers are stuck to each
other.

Ensure that the adhesive surface of the tape overlaps the lower layer.

When cutting off the cable ties, reserve a redundant length of 3 mm (0.12 in.) to 5 mm (0.2 in.).
1.
Verify that dustproof caps are not removed.
2.
Wrap three layers of waterproof tape on the connector, first from bottom up, then from
top down, and finally from bottom up. Wrap each connector with three layers of
waterproof tape, from bottom up, then from top down, and finally from bottom up. Do
not cut the tape until all the three layers of the tape are already wrapped. Cut off the
redundant tape after three layers are wrapped. Wrap each layer of tape around the
connector tightly.
3.
Wrap three layers of PVC insulation tape. Wrap each connector with three layers of
waterproof tape, from bottom up, then from top down, and finally from bottom up. Do
not cut the tape until all the three layers of the tape are already wrapped. Cut off the
redundant tape after three layers are wrapped. Wrap each layer of tape around the
connector tightly.
4.
Start binding cable ties to the cable at a position 3 mm (0.12 in.) to 5 mm (0.2 in.) away
from one end of the PVC insulation tape.
Step 5 Route the cables according to the instructions in 9.1 Cabling Requirements, and then use
cable ties to bind the cables.
Step 6 Label the installed cables according to the instructions in Attaching a Sign Plate Label.
Step 7 Attach color-coding to the installed RF jumper according to the instructions in Attaching the
Color Ring.
----End
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9.7 Installing an RU AISG Multi-Wire Cable and AISG
Extension Cable
This section describes the procedures for installing an RU AISG multi-wire cable and AISG
extension cable.
Context
When the distance between an RU and a Remote Control Unit (RCU) is longer than 5 m (16.4
ft.), an AISG multi-wire cable is not long enough to connect the RU and the RCU. In this case,
an AISG extension cable is used to extend the AISG multi-wire cable.
Procedure

Install an AISG multi-wire cable that is not configured with an AISG extension cable.
1.
Use an M3 flat-head screwdriver to loosen the screws on the dustproof cap on the RET
port and remove the dustproof cap.
2.
Link the waterproofed DB9 connector at one end the AISG multi-wire cable to the RET
port on the RU bottom, as shown in Figure 9-16.
Figure 9-16 Installing an RU AISG multi-wire cable
3.
Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof DB9
connector to 0.4 N·m (3.54 lbf·in.).
4.
Connect the other end of the cable to the standard AISG male connector on the RCU.
5.
Route the cables according to the instructions in 9.1 Cabling Requirements, and then use
cable ties to bind the cables.
6.
Label the installed cables according to the instructions in Attaching an L-Shaped Label.

Install an AISG multi-wire cable that is configured with an AISG extension cable.
1.
Use an M3 flat-head screwdriver to loosen the screws on the dustproof cap on the RET
port and remove the dustproof cap.
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2.
Link the waterproofed DB9 connector at one end of the AISG multi-wire cable to the
RET port on the RU bottom, and link the other end to the standard AISG male connector
of the AISG extension cable, as shown in Figure 9-17.
Figure 9-17 Installing an RU AISG multi-wire cable
3.
Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof DB9
connector to 0.4 N·m (3.54 lbf·in.).
4.
Connect the other end of the AISG extension cable to the standard AISG male connector
on the RCU, as shown in Figure 9-18.
Figure 9-18 Installing an RU AISG extension cable
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5.
Route the cables according to the instructions in 9.1 Cabling Requirements, and then use
cable ties to bind the cables.
6.
Label the installed cables according to the instructions in Attaching an L-Shaped Label.
----End
9.8 Installing an RU Alarm Cable
This section describes the procedure for installing an RU alarm cable.
Procedure
Step 1 Use an M3 Phillips screwdriver to loosen the screws on the dustproof cap on the EXT_ALM
port and remove the dustproof cap.
Step 2 Connect the waterproof DB15 connector at one end of the RU alarm cable to the EXT_ALM
port on the RU, as shown in Figure 9-19.
Figure 9-19 Installing an RU alarm cable
Install the waterproof DB15 male connector on the RU alarm cable with caution, preventing the pin
assignment from being damaged.
Step 3 Use an M3 Phillips screwdriver to tighten the posts on both sides of the waterproof DB15
male connector to 0.4 N·m (3.54 lbf·in.).
Step 4 Connect the eight cord end terminals at the other end to external alarm devices.
Use insulating adhesive tapes to wrap cord end terminals that are not in use and fix them at a proper
position based on the onsite situations. This prevents false alarm reporting and equipment damage due to
contact of exposed cables. Figure 9-20 shows the method for handling cord end terminals not in use.
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Figure 9-20 Method for handling cord end terminals that are not in use
Step 5 Route the cables according to the instructions in 9.1 Cabling Requirements, and then use
cable ties to bind the cables.
Step 6 Label the installed cables according to the instructions in Attaching an L-Shaped Label.
----End
9.9 Opening the Cover Plate of an RU Cabling Cavity
This section describes the procedure for opening the cover plate of an RU cabling cavity.
Procedure
Step 1 Wear ESD gloves.
Take proper ESD protection measures, for example, wear ESD gloves, to prevent electrostatic
damage to the boards, modules, or electronic components.
Step 2 Use an M5 Phillips screwdriver to loosen the three screws on the cover plate of the RU
cabling cavity, and open the cover plate, as shown in Figure 9-21.
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Figure 9-21 Opening the cover plate of the RU cabling cavity
(1) Cover plate
(2) Cabling cavity
(3) Clip
(4) Cable trough for the power
cable
(5) Waterproof
block
(6) Cable trough for the fiber optic
cable
Step 3 Loosen the screws on the clip using an M4 Phillips screwdriver, and open the clip, as shown
Figure 9-22.
Open the clip only for the associated cable.
Figure 9-22 Opening clips
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Step 4 Remove the waterproof block.
Remove only the waterproof blocks for the cables to be installed.
----End
9.10 Installing an RU Power Cable
This section describes the procedure for installing an RU power cable.
Prerequisites

A tool-less female connector (pressfit type) is added to the RU power cable on the RU
side. For details, see 12.1 Adding a Tool-Less Female Connector (Pressfit Type) to the
RU Power Cable on the RU Side.

A connector or OT terminals are added to the RU power cable on the power device side.
For details, see the DBS3900 Installation Guide.
Context
If a power device provided by the customer is used, the recommended specification of the
circuit breaker on this power device is 15 A to 30 A.
There are three types of RU power cables in terms of cross-sectional areas: 3.3 mm2 (0.005
in.2) (12 AWG) and 5.3 mm2 (0.008 in.2) (10 AWG) complying with North American
standards and 4 mm2 (0.006 in.2) complying with European standards.
Table 9-2 describes the RU power cable.
Table 9-2 RU power cable
Cable
On the RU
Side
On the
Power
Device Side
Pow
er
Devi
ce
Color
RU
power
cable
Tool-less female
connector
(pressfit type)
Tool-less
female
connector
(pressfit type)
EPU
A cable with a black jacket and
two wires inside
EPC5
connector
DCD
U-12
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U-11

North American standards:
The RTN(+) wire is black and
the RNEG(-) wire is blue.

European standards: The
RTN(+) wire is brown and the
RNEG(-) wire is blue.
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Ensure that the RU power cable must be connected to the RU first and then to the power
device. The operations in the reverse sequence may cause component damage or personal
injury.
Procedure
Step 1 Connect the tool-less female connector (pressfit type) at one end of the RU power cable to the
power supply socket on the RU, as shown in Figure 9-23.
Figure 9-23 Installing an RU power cable
Ensure that the exposed shield layer of the power cable is properly tightened using the clip.
Step 2 Connect the connector at the other end of the RU power cable to the corresponding position
on the power device.
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
A DCDU-11B/DCDU-12B can supply power to a maximum of six RUs. Ensure that the RU power
cable is connected to one of LOAD0 to LOAD5 ports on the DCDU-11B/DCDU-12B.

One EPU can supply power to a maximum of six RUs. Ensure that the RU power cable is connected
to one of RU0 to RU5 ports on the EPU.

When the RU power cable is connected to the EPU, the blue core wire in the tool-less female
connector (pressfit type) is connected to the upper port on the EPU, and the black/brown core wire is
connected to the lower port on the EPU.
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Step 3 Route the cable according to the instructions in 9.1 Cabling Requirements, and then use a
cable tie to bind the cable.
Step 4 Label the installed cable according to the instructions in Attaching a Cable-Tying Label.
----End
9.11 Installing a CPRI Fiber Optic Cable
This section describes the procedure for installing a CPRI fiber optic cable.
Prerequisites
Before the installation, single-mode optical modules can be distinguished from multi-mode
optical modules in either of the following ways:

SM and MM labels on an optical module: SM indicates a single-mode optical module,
and MM indicates a multi-mode optical module.

Color of the puller on an optical module: Blue indicates a single-mode optical module,
and black or gray indicates a multi-mode optical module.
The optical modules to be installed must match CPRI rates.
Context

A CPRI fiber optic cable transmits CPRI signals between a BBU and an RU.

For details about CPRI fiber optic cable connections, see section "CPRI Cable
Connections" in the BBU3900 Hardware Description or DBS3900 Hardware
Description.
Procedure
Step 1 Lower the pullers of two optical modules, insert one optical module into the CPRI0 port on
the RU and the other optical module into the CPRI port on the BBU, and raise the pullers, as
shown in Figure 9-24.
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Figure 9-24 Installing an optical module
The performance of an optical module that is exposed to the air for more than 20 minutes may
be abnormal. Therefore, you must insert an fiber optic cable into an unpacked optical module
within 20 minutes.
Step 2 Connect the end labeled 1A and 1B of the fiber optic cable to the optical module on the RU
side, as shown in Figure 9-25.
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Figure 9-25 Installing a CPRI fiber optic cable

To avoid any damage to fiber optic cables, the cables connected to the RU must be
installed according to the installation process. For details about the installation process, see
9.3 Installation Process.
Step 3 Connect the end labeled 2A and 2B of the fiber optic cable to the optical module on the BBU
side.
Step 4 Route the cables according to the instructions in 9.1 Cabling Requirements, and then use
cable ties to bind the cables.
Step 5 Label the installed cables according to the instructions in Attaching an L-Shaped Label.
----End
9.12 Closing the Cover Plate of an RU Cabling Cavity
This section describes the procedure for closing the cover plate of an RU cabling cavity.
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Procedure
Step 1 Close the clips for the installed cables. Use an M4 torque screwdriver to tighten the screws on
each clip to 1.4 N·m (12.39 lbf·in.), as shown in Figure 9-26.
Ensure that the exposed shield layer of the power cable is properly tightened using the clip.
Figure 9-26 Closing clips
Step 2 Insert waterproof blocks into vacant cable troughs in the cabling cavity, as shown in Figure
9-27.
Ensure that cables and waterproof blocks are properly inserted into troughs.
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Figure 9-27 Correct placement of waterproof blocks
Step 3 Close the cover plate of the RU cabling cavity. Use an M5 torque screwdriver to partially
tighten the screws on the cover plate in the sequence shown in Figure 9-28. Then tighten the
screws to 2 N·m (17.7 lbf·in.) in the same sequence.
Figure 9-28 Closing the cover plate of an RU cabling cavity
Step 4 Take off the ESD gloves, and pack up all the tools.
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10 Checking the RU Hardware Installation
10
Checking the RU Hardware
Installation
After an RU is installed, check the hardware installation.
Table 10-1 provides the checklist for the RU hardware installation.
Table 10-1 Checklist for the RU hardware installation
SN
Item
The position for each device conforms to the engineering drawing and meets the
space requirement. Sufficient space is reserved for equipment maintenance.
The RU is securely installed.
The cover plate is securely installed on the RU cabling cavity.
Waterproof blocks are securely installed in vacant cable troughs of the RU
cabling cavity, and the cover plate for the cabling cavity is securely installed. In
addition, vacant RF ports are covered with dustproof caps and the caps are
tightened.
There are no connectors or joints on each power cable or PGND cable.
The terminals at two ends of each power cable or PGND cable are securely
soldered or crimped.
None of power cables and PGND cables can be short-circuited or reversely
connected. In addition, these cables are not damaged or broken.
Power cables and PGND cables are separately bound from other cables.
The protection grounding of the RU and the surge protection grounding of the
building share one group of ground conductors.
10
The connectors of each signal cable are intact and securely linked, and these
cables are not damaged or broken.
11
Labels are correct, legible, and complete at both ends of each cable, feeder, and
jumper.
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11 Powering On an RU
11
Powering On an RU
After all the devices are installed, check the power-on status of an RU.
After you unpack an RU, you must power on it within 24 hours. If you power off the RU for
maintenance, you must restore power to the RU within 24 hours.
Figure 11-1 shows the RU power-on check process.
For details about how to power on an RU, see Powering On an RU. For details about how to power off
an RU, see section "Powering-Off the RU" in RU Maintenance Guide.
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11 Powering On an RU
Figure 11-1 RU power-on check process
(a) The normal input voltage of an RU is -48 V DC. The voltage of the external power
supply should range from -36 V DC to -57 V DC.
(b) The RUN indicator on the RU is on for 1s and off for 1s. The ALM indicator is steady
off.
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12 Appendix
12
Appendix
About This Chapter
This section describes the procedure for adding an easy power receptacle (pressfit type)
connector.
12.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RU Power Cable on the
RU Side
This section describes the procedure for adding a tool-less female connector (pressfit type) to
the RU power cable on the RU side.
12.1 Adding a Tool-Less Female Connector (Pressfit Type)
to the RU Power Cable on the RU Side
This section describes the procedure for adding a tool-less female connector (pressfit type) to
the RU power cable on the RU side.
Context
Figure 12-1 shows the cable diagram on labels.
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12 Appendix
Figure 12-1 Cable diagram on labels
(1) Cable diagram on labels
Procedure
Step 1 Determine the length of the power cable for different operations based on the labels, as shown
in Figure 12-2.
Figure 12-2 Determining the length of the power cable
Step 2 Strip the specified length of the sheath off the power cable, as shown in Figure 12-3.
Figure 12-3 Stripping the specified length of sheath
Step 3 Strip a specified length of sheath off each core wire. The length must be consistent with the
length of the notch in the tool-less female connector (pressfit type), as shown in Figure 12-4.
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12 Appendix
Figure 12-4 Stripping the sheath off each core wire
Figure 12-5 Matched length
Step 4 Add a tool-less female connector (pressfit type) to two core wires.
1.
Tighten the screws using a Phillips screwdriver, as shown in Figure 12-6.
Figure 12-6 Tightening screws
2.
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Connect the blue core wire labeled NEG(-) to the - port and the black/brown core wire
labeled RTN(+) to the + port on the tool-less female connector (pressfit type), and then
tighten the screws using a Phillips screwdriver, and then use a torque screwdriver to
tighten the M4 screws to 1.4 N·m (12.39 lbf·in.), as shown in Figure 12-7.
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12 Appendix
Figure 12-7 Adding a tool-less female connector (pressfit type) to two core wires
Step 5 Strip the specified length of the sheath off the power cable to expose the intact shield layer, as
shown in Figure 12-8.
Figure 12-8 Stripping the sheath off the power cable
Each core wire is exposed outside the tool-less female connector (pressfit type) for 1.5 mm
(0.059 [in.]), as shown in Figure 12-9.
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12 Appendix
Figure 12-9 Inserting core wires into the tool-less female connector (pressfit type)
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