Huawei Technologies RRU3971PCS Remote Radio Unit User Manual Installation Guide

Huawei Technologies Co.,Ltd Remote Radio Unit Installation Guide

UserManual.wiki >

Huawei Technologies >

RRU3971PCS User Manual >

Installation Guide HTML Version

1. Installation Guide
2. Safety information

Installation Guide

Issue

Date

HUAWEI TECHNOLOGIES CO., LTD.

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

Issue () Huawei Proprietary and Confidential

About This Document

Purpose

This document describes the process of installing DC blade RRU3971 (referred to as RRU in

this document).

Product Versions

The following table lists the product versions related to this document.

Product Name Solution Version Product Version

DBS3900 lSRAN9.0

lGBSS16.0

leRAN7.0

V100R009C00

lSRAN10.1 and later

versions

lGBSS17.1 and later

versions

leRAN8.1 and later

versions

V100R010C10 and later

versions

Intended Audience

This document is intended for:

Base station installation engineers

Organization

1 Changes in RRU3971 Installation Guide

This section describes the changes in the RRU3971 Installation Guide.

2 Installation Preparations

About This Document

Issue () Huawei Proprietary and Confidential

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 RRU, you must be familiar with its exterior, ports, indicators, installation

options and installation clearance requirements.

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 RRU and RRU cables, checking the RRU

hardware installation, and powering on an RRU.

6 Hoisting an RRU and Related Cables onto a Tower

This section describes the procedure for hoisting an RRU and related cables onto a tower and

the precautions that must be taken.

7 Installing the RRU

This chapter describes the procedure for installing the RRU. The procedure for installing the

RRU varies depending on installation options.

8 Installing RRU Cables

This chapter describes the procedure for installing RRU cables.

9 Checking the RRU Hardware Installation

After an RRU is installed, check the hardware installation.

10 Powering On an RRU

After all the devices are installed, check the power-on status of an RRU.

11 Appendix

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.

About This Document

Issue () Huawei Proprietary and Confidential

iii

Symbol Description

Indicates a potentially hazardous situation which, if not

avoided, may result in minor or moderate injury.

Indicates a potentially hazardous situation which, if not

avoided, could result in equipment damage, data loss,

performance deterioration, or unanticipated results.

NOTICE is used to address practices not related to personal

injury.

Calls attention to important information, best practices and

tips.

NOTE is used to address information not related to personal

injury, equipment damage, and environment deterioration.

General Conventions

The general conventions that may be found in this document are defined as follows.

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

Boldface Names of files, directories, folders, and users are in

boldface. For example, log in as user root.

Italic Book titles are in italics.

Courier New Examples of information displayed on the screen are in

Courier New.

Command Conventions

The command conventions that may be found in this document are defined as follows.

Convention Description

Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

[ ] Items (keywords or arguments) in brackets [ ] are optional.

{ x | y | ... } Optional items are grouped in braces and separated by

vertical bars. One item is selected.

[ x | y | ... ] Optional items are grouped in brackets and separated by

vertical bars. One item is selected or no item is selected.

About This Document

Issue () Huawei Proprietary and Confidential

Convention Description

{ x | y | ... }*Optional items are grouped in braces and separated by

vertical bars. A minimum of one item or a maximum of all

items can be selected.

[ x | y | ... ]*Optional items are grouped in brackets and separated by

vertical bars. Several items or no item can be selected.

GUI Conventions

The GUI conventions that may be found in this document are defined as follows.

Convention Description

Boldface Buttons, menus, parameters, tabs, window, and dialog titles

are in boldface. For example, click OK.

>Multi-level menus are in boldface and separated by the ">"

signs. For example, choose File > Create > Folder.

Keyboard Operations

The keyboard operations that may be found in this document are defined as follows.

Format Description

Key Press the key. For example, press Enter and press Tab.

Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt

+A means the three keys should be pressed concurrently.

Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A means

the two keys should be pressed in turn.

Mouse Operations

The mouse operations that may be found in this document are defined as follows.

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.

About This Document

Issue () Huawei Proprietary and Confidential

Action Description

Drag Press and hold the primary mouse button and move the

pointer to a certain position.

About This Document

Issue () Huawei Proprietary and Confidential

Contents

About This Document.....................................................................................................................ii

1 Changes in RRU3971 Installation Guide..................................................................................1

2 Installation Preparations..............................................................................................................2

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 RRU Exterior..................................................................................................................................................................7

3.2 RRU Ports.......................................................................................................................................................................8

3.3 RRU Indicators.............................................................................................................................................................10

3.4 Installation Scenarios....................................................................................................................................................12

3.5 Installation Clearance Requirements of an RRU..........................................................................................................23

3.5.1 Clearance for a Single RRU......................................................................................................................................23

3.5.2 Clearance for Three or More RRUs...........................................................................................................................27

3.5.3 Installation Spacing Between RRUs..........................................................................................................................31

4 Unpacking the Equipment.........................................................................................................34

5 Installation Process.....................................................................................................................36

6 Hoisting an RRU and Related Cables onto a Tower............................................................37

6.1 Hoisting an RRU onto a Tower....................................................................................................................................38

6.2 Hoisting Fiber Optic Cables onto a Tower...................................................................................................................42

6.3 Hoisting Power Cables onto a Tower...........................................................................................................................45

7 Installing the RRU.......................................................................................................................48

7.1 Mounting Kits for an RRU...........................................................................................................................................49

7.2 Installing the RRU on a Pole........................................................................................................................................50

7.2.1 Installing a Single RRU.............................................................................................................................................50

7.2.2 Installing Two RRUs.................................................................................................................................................53

7.2.3 Installing Three or More RRUs.................................................................................................................................58

7.3 Installing an RRU on U-steel .......................................................................................................................................63

7.4 Installing an RRU on Angle Steel................................................................................................................................68

7.5 Installing an RRU on a Wall.........................................................................................................................................73

Contents

Issue () Huawei Proprietary and Confidential

vii

7.6 Installing an RRU on an IFS06.....................................................................................................................................78

8 Installing RRU Cables................................................................................................................85

8.1 Cabling Requirements..................................................................................................................................................87

8.2 RRU Cable Connections...............................................................................................................................................94

8.3 Installing RRU Cables..................................................................................................................................................97

8.4 RRU Cables..................................................................................................................................................................98

8.5 Installing an RRU PGND Cable...................................................................................................................................99

8.6 Installing an RRU RF Jumper....................................................................................................................................101

8.7 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable...................................................................104

8.8 Installing an RRU Alarm Cable..................................................................................................................................107

8.9 Opening the Cover Plate of an RRU Cabling Cavity.................................................................................................109

8.10 Installing a CPRI Optical Cable...............................................................................................................................110

8.11 Installing an RRU Power Cable................................................................................................................................112

8.12 Closing the Cover Plate of an RRU Cabling Cavity................................................................................................115

9 Checking the RRU Hardware Installation............................................................................118

10 Powering On an RRU.............................................................................................................119

11 Appendix...................................................................................................................................121

11.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side......................122

Contents

Issue () Huawei Proprietary and Confidential

viii

1 Changes in RRU3971 Installation Guide

This section describes the changes in the RRU3971 Installation Guide.

Draft A (2015-09-30)

This is a draft.

1 Changes in RRU3971 Installation Guide

Issue () Huawei Proprietary and Confidential

2 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 Installation Preparations

Issue () Huawei Proprietary and Confidential

2.1 Reference Documents

Before the installation, you must be familiar with reference documents.

The following reference documents are required during RRU installation:

lRRU3971 Hardware Description

lDBS3900 Installation Guide

lOCB User Guide

lOCB-01M User Guide

2.2 Tools and Instruments

You must prepare the following tools and instruments before the installation.

Hammer drill (a φ12 bit) ESD gloves Vacuum cleaner

Heat gun Phillips screwdriver (M3 to

M6)

Flat-head screwdriver (M3 to

M6)

Rubber mallet COAX crimping tool Wire stripper

2 Installation Preparations

Issue () Huawei Proprietary and Confidential

Utility knife Cable cutter Adjustable wrench (size ≥ 32

mm [1.26 in.])

Torque wrench

Size: 16 mm (0.63 in.) and 22

mm (0.87 in.)

Combination wrench

Size: 16 mm (0.63 in.) and 22

mm (0.87 in.)

Level Torque screwdriver

5 mm

(M3 to M6)

Torque socket

Multimeter Marker (diameter ≤ 10 mm

[0.39 in.])

Measuring tape

Inner hexagon wrench

5 mm

Fixed pulley(weight-bearing

capacity > 500 kg or 1102.5

lb)

Lifting sling

Hydraulic pliers - -

2 Installation Preparations

Issue () Huawei Proprietary and Confidential

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:

lThe customer's technical engineers must be trained by Huawei and be familiar with the

proper installation and operation methods.

lThe number of onsite personnel depends on the engineering schedule and installation

environment. Generally, only three to five onsite personnel are necessary.

2 Installation Preparations

Issue () Huawei Proprietary and Confidential

3 Information About the Installation

About This Chapter

Before installing an RRU, you must be familiar with its exterior, ports, indicators, installation

options and installation clearance requirements.

3.1 RRU Exterior

This section describes the exterior and dimensions of an RRU.

3.2 RRU Ports

This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity

panel, and indicator panel.

3.3 RRU Indicators

This section describes six indicators on an RRU. They indicate the running status of the RRU.

3.4 Installation Scenarios

An RRU can be installed on a pole, U-steel, angle steel, wall, or IFS06. Installation scenarios

must meet heat-dissipation and waterproofing requirements of the RRU.

3.5 Installation Clearance Requirements of an RRU

This section describes the requirements for the installation clearance of a single RRU and

multiple RRUs and the requirements for the installation spacing between RRUs.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

3.1 RRU Exterior

This section describes the exterior and dimensions of an RRU.

Figure 3-1 shows the exterior of an RRU.

Figure 3-1 RRU exterior

Figure 3-2 shows RRU dimensions.

Figure 3-2 RRU dimensions

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

You can obtain the RRU name, RRU frequency band and power supply information from the

nameplate on the cover plate. Figure 3-3 shows the positions of the nameplate on the RRU.

NOTE

The actual nameplate may differ from what is shown in the figure.

Figure 3-3 Positions of the nameplate

(1) Nameplate (2) Module name (3) Frequency band (4) Power supply module

3.2 RRU Ports

This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity

panel, and indicator panel.

Figure 3-4 shows the ports on the RRU panels.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-4 Ports on the RRU panels

Table 3-1 describes ports and indicators on the RRU panels.

Table 3-1 Ports and indicators on the RRU panels

Item Silkscreen Remarks

(1) Ports in the cabling

cavity

RTN(+) Power supply socket, for details about RRU

power cable experience and specifications,

see RRU Power Cable.

NEG(-)

CPRI0 Optical/electrical port 0, connected to the

BBU

CPRI1 Optical/electrical port 1, connected to the

BBU

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Item Silkscreen Remarks

(2) Bottom ports A T/R TX/RX port A, supporting RET signal

transmission

C T/R TX/RX port C

D T/R TX/RX port D

B T/R TX/RX port B, supporting RET signal

transmission

EXT_ALM Alarm monitoring port used for monitoring

one RS485 signal and two dry contact signals

RET Communication port for the RET antenna,

supporting RET signal transmission

(3) Indicator RUN For details, see 3.3 RRU Indicators.

ALM

ACT

VSWR

CPRI0

CPRI1

NOTE

lThe port for transmitting RET signals is determined by the software.

lConnect the CPRI0 port to the BBU by default in the single-mode scenario.

3.3 RRU Indicators

This section describes six indicators on an RRU. They indicate the running status of the RRU.

For detailed positions of RRU indicators, see 3.2 RRU Ports.

Table 3-2 describes RRU indicators.

Table 3-2 RRU Indicators

Indicator Color Status Meaning

RUN Green Steady on The power input is available, but the board is

faulty.

Steady off No power input is available or the board is

faulty.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Indicator Color Status Meaning

Blinking (on for

1s and off for 1s)

The board is running properly.

Blinking (on for

0.125s and off for

0.125s)

The board software is being loaded or the

board is not working.

ALM Red 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 faults on the related board or ports.

Therefore, you need to locate the fault before

deciding whether to replace the module.

Steady off No alarms are generated.

ACT Green Steady on The board is working properly when TX

channels are enabled or software is being

loaded to a board that is not started.

Blinking (on for

1s and off for 1s)

The board is running with TX channels

disabled.

VSWR Red 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.

CPRI0 Red and

green

Steady green The CPRI link is running properly.

Steady red An optical module fails to receive or transmit

signals possibly because the optical module

is faulty or the optical fiber is broken.

Blinking red (on

for 1s and off for

1s)

The CPRI link is out of lock because of faults

on the mutual lock of dual-mode clock

sources or mismatched data rates on CPRI

ports.

Steady off The optical module cannot be detected or is

powered off.

CPRI1 Red and

green

Steady green The CPRI link is running properly.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Indicator Color Status Meaning

Steady red An optical module fails to receive or transmit

signals possibly because the optical module

is faulty or the optical fiber is broken.

Blinking red (on

for 1s and off for

1s)

The CPRI link is out of lock because of faults

on the mutual lock of dual-mode clock

sources or mismatched data rates on CPRI

ports.

Steady off The optical module cannot be detected or is

powered off.

NOTE

VSWR indicators on RRUs providing one or more than two TX channels have two types of status:

lSteady off: No VSWR alarm is generated.

lSteady on: VSWR alarms are generated on one or more ports.

3.4 Installation Scenarios

An RRU can be installed on a pole, U-steel, angle steel, wall, or IFS06. Installation scenarios

must meet heat-dissipation and waterproofing requirements of the RRU.

Requirements for the Installation Scenarios

Application scenarios:

To ensure proper heat dissipation of the RRU, the following requirements must be met:

lThe RRU cannot be installed in an enclosed cabinet without a cooling system.

lThe RRU cannot be installed in an enclosed camouflage box.

lThe RRU cannot be installed in an enclosed equipment room without a cooling system.

lWhen multiple RRUs are installed in centralized mode, the minimum clearance

requirements must be met. For details about the minimum clearance requirements, see 3.5.2

Clearance for Three or More RRUs and 3.5.3 Installation Spacing Between RRUs.

lRRU mounting kits in assembled installation mode are not allowed in indoor scenarios.

NOTICE

If the RRU is inappropriately installed, heat dissipation of the RRU deteriorates and the RRU

may not work properly, as shown in Figure 3-5.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-5 inappropriately installed RRU

Correct installation methods:

lThe installation supports' specifications described in this document are only based on the

exterior and dimensions of the mounting kits. Before installing equipment, assess the

strength and reliability of the installation support to determine whether it can bear the weight

of the equipment.

lTo ensure the heat dissipation of the RRU and waterproofing of the ports at the bottom of

the RRU, the vertical deviation angle of an RRU must be less than or equal to 10 degrees,

as shown Figure 3-6.

lOn a tower, an RRU can be installed on a pole, angle steel, or U-steel. The side-mounted

installation mode (one side instead of the rear of an RRU is mounted on the support) is

recommended for RRUs on the main pole secured on a tower. This installation mode allows

multiple RRUs 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 RRUs on

the auxiliary pole to meet the minimum clearance requirements. Otherwise, the standard

mode is recommended for installing RRUs on the auxiliary pole.

Figure 3-6 Requirements for the vertical deviation angle of an RRU

(1) RRU (2) Installation support (pole, U-steel, angle steel, or wall)

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Installing an RRU on a Pole

Figure 3-7 shows the diameter of a pole for installing an RRU.

Figure 3-7 Diameter of a pole

NOTICE

lThe diameter of a pole for installing an RRU ranges from 60 mm (2.36 in.) to 114 mm (4.49

in.). The recommended diameter is 80 mm (3.15 in.).

lWhen the diameter of a pole ranges from 60 mm (2.36 in.) to 76 mm (2.99 in.), a maximum

of three RRUs can be installed on the pole and the side-mounted installation is recommended.

The RRU installation in standard mode is not recommended.

lOnly a pole whose diameter ranges from 76 mm (2.99 in.) to 114 mm (4.49 in.) supports

more than three RRUs.

lThe recommended thickness of the pole wall is 3.5 mm (0.14 in.) or above.

Figure 3-8 shows a single RRU installed on a pole.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-8 A single RRU installed on a pole

Figure 3-9 shows two RRUs installed on a pole.

Figure 3-9 Two RRUs installed on a pole

Figure 3-10, Figure 3-11, and Figure 3-12 show multiple RRUs installed on a pole.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-10 Three RRUs installed on a pole

Figure 3-11 Four RRUs installed on a pole

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-12 Six RRUs installed on a pole

Installing an RRU on U-Steel

Figure 3-13 shows U-steel specifications.

Figure 3-13 U-steel specifications

NOTICE

U-steel only supports the standard installation of a single RRU.

Figure 3-14 shows an RRU installed on U-steel.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-14 RRU installed on U-steel

Installing an RRU on Angle Steel

Figure 3-15 shows angle steel specifications.

Figure 3-15 Angle steel specifications

NOTICE

Angle steel only supports the standard installation of a single RRU.

Figure 3-16 shows an RRU installed on angle steel.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-16 RRU installed on angle steel

Installing an RRU on a Wall

The wall for installing RRUs must meet the following requirements:

lFor each RRU, the wall must be able to bear a weight four times heavier than the RRU's

weight and the bolts' pulling force of 1.25 kN (281.25 lbf) vertical to the wall.

lExpansion bolts must be tightened to 30 N•m to ensure that the bolts work properly and

the wall remains intact.

NOTICE

lThe standard installation is recommended for RRUs installed on a wall.

lWhen RRUs are installed on a wall in side-mounted mode, do not combine mounting brackets

for multiple RRUs, as shown in Figure 3-17.

Figure 3-17 Correct installation of mounting brackets for multiple RRUs installed on a wall in

side-mounted mode

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-18 shows an RRU installed on a wall.

Figure 3-18 RRU installed on a wall

Installing an RRU on an IFS06

lThe upper and lower adjustable beams on an IFS06 can be moved up and down to fit for

heights of RRUs.

lThe IFS06 supports at least three RRUs when the ambient temperature is higher than or

equal to the lowest operating temperature of the RRUs and at least 5°C (41°F) lower than

the highest operating temperature of the RRUs. The IFS06 supports a maximum of six

RRUs when the ambient temperature is higher than or equal to the lowest operating

temperature of the RRUs and at least 10°C (50°F) lower than the highest operating

temperature of the RRUs.

NOTE

For details about the operating temperature of the RRUs, see section "Technical Specifications of

RRUs" in 3900 Series Base Station Technical Description.

NOTICE

The mounting brackets for multiple RRUs cannot be combined when the RRUs are installed on

an IFS06, as shown in Figure 3-19.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-19 Correct installation of mounting brackets for RRUs installed on an IFS06

Figure 3-20 and Figure 3-21 show RRUs installed on an IFS06.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-20 Three RRUs installed on an IFS06

(1) Height-restricted scenario (2) Height-unrestricted scenario

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-21 Six RRUs installed on an IFS06

(1) Height-restricted scenario (2) Height-unrestricted scenario

3.5 Installation Clearance Requirements of an RRU

This section describes the requirements for the installation clearance of a single RRU and

multiple RRUs and the requirements for the installation spacing between RRUs.

3.5.1 Clearance for a Single RRU

This section describes the recommended and minimum clearances for a single RRU.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

NOTICE

If an RRU is installed on the bitumen ground, the RRU 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 RRU on the non-bitumen ground.

NOTE

lThe recommended clearances ensure normal running and provide appropriate space for operation and

maintenance (O&M). If the installation space is sufficient, leave the recommended clearances after

installing the equipment.

lThe minimum clearance ensures normal running and heat dissipation, but O&M 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 RRU in Side-Mounted Mode

Figure 3-22 shows the clearance for a single RRU in side-mounted mode.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-22 Clearance for a single RRU in side-mounted mode

Clearance for a Single RRU in Standard Mode

Figure 3-23 shows the clearance for a single RRU in standard mode.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-23 Clearance for a single RRU in standard mode

Clearance for a Single Tower-Mounted RRU

Figure 3-24 and Figure 3-25 show the minimum clearances for a single RRU in side-mounted

mode and standard mode on a tower.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-24 Minimum clearance for a single RRU in side-mounted mode on a

Figure 3-25 Minimum clearance for a single RRU in standard mode on a tower

3.5.2 Clearance for Three or More RRUs

This section describes the recommended and minimum clearances for three or more RRUs.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

NOTICE

If an RRU is installed on the bitumen ground, the RRU 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 RRUs on the non-bitumen ground.

NOTE

lThe recommended clearances ensure normal running and provide appropriate space for operation and

maintenance (O&M). If the installation space is sufficient, leave the recommended clearances after

installing the equipment.

lThe minimum clearance ensures normal running and heat dissipation, but O&M 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.

Recommended Clearances for Three or More RRUs Installed in Centralized Mode

Figure 3-26 shows the recommended clearances for three or more RRUs installed in centralized

mode.

Figure 3-26 Recommended clearances for three or more RRUs installed in centralized mode

Minimum Clearances for Three or More RRUs Installed in Centralized Mode

Figure 3-27 shows the minimum clearances for three or more RRUs installed in centralized

mode.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-27 Minimum clearances for three or more RRUs installed in centralized mode

Recommended Clearances for Three or More RRUs Installed in Standard Mode on

a Wall

Figure 3-28 shows the recommended clearances for three or more RRUs installed in standard

mode on a wall.

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Figure 3-28 Recommended clearances for three or more RRUs installed in standard mode on a

wall

Minimum Clearances for Three or More RRUs Installed in Standard Mode on a

Wall

Figure 3-29 shows the minimum clearances for three or more RRUs installed in standard mode

on a wall.

Figure 3-29 Minimum clearances for three or more RRUs installed in standard mode on a wall

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Recommended Clearances for Three or More RRUs Installed in Side-Mounted

Mode on a Wall

Figure 3-30 shows the recommended clearances for three or more RRUs installed in side-

mounted mode on a wall.

Figure 3-30 Recommended clearances for three or more RRUs installed in side-mounted mode

on a wall

3.5.3 Installation Spacing Between RRUs

This section describes the horizontal and vertical spacing between RRUs.

Recommended Horizontal Spacing Between RRUs

Figure 3-31 shows the recommended horizontal spacing between RRUs.

Figure 3-31 Recommended horizontal spacing between RRUs

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Minimum Horizontal Spacing Between RRUs

Figure 3-32 shows the minimum horizontal spacing between RRUs.

Figure 3-32 Minimum horizontal spacing between RRUs

Recommended Vertical Spacing Between RRUs

Figure 3-33 shows the recommended vertical spacing between RRUs.

Figure 3-33 Recommended vertical spacing between RRUs

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

Minimum Vertical Spacing Between RRUs

Figure 3-34 shows the minimum vertical spacing between RRUs.

Figure 3-34 Minimum vertical spacing between RRUs

3 Information About the Installation

Issue () Huawei Proprietary and Confidential

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.

Context

NOTE

When transporting, moving, or installing the equipment, components, or parts, you must:

lPrevent them from colliding with doors, walls, shelves, or other objects.

lWear clean gloves, and avoid touching the equipment, components, or parts with bare hands, sweat-

soaked gloves, or dirty gloves.

NOTICE

lAfter a cabinet or an BBU is unpacked, it must be powered on within 7 days.

lAfter an RRU 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.

4 Unpacking the Equipment

Issue () Huawei Proprietary and Confidential

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.

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.

CAUTION

lTo 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.

lVerify that the insulation layers of all RRU cables are intact. If the insulation layers are

damaged or broken, water will penetrate into the cables, which may cause damages to RRUs

or human injury.

----End

4 Unpacking the Equipment

Issue () Huawei Proprietary and Confidential

5 Installation Process

The installation process involves installing an RRU and RRU cables, checking the RRU

hardware installation, and powering on an RRU.

Figure 5-1 shows the installation process.

Figure 5-1 Process of installing an RRU

5 Installation Process

Issue () Huawei Proprietary and Confidential

6 Hoisting an RRU and Related Cables onto a

Tower

About This Chapter

This section describes the procedure for hoisting an RRU and related cables onto a tower and

the precautions that must be taken.

6.1 Hoisting an RRU onto a Tower

This section describes the procedures and precautions for hoisting an RRU and its mounting kits

onto a tower. In tower-mounted scenarios, the RRU can be installed on a pole, U-steel, or angle

steel.

6.2 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.

6.3 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.

6 Hoisting an RRU and Related Cables onto a Tower

Issue () Huawei Proprietary and Confidential

6.1 Hoisting an RRU onto a Tower

This section describes the procedures and precautions for hoisting an RRU and its mounting kits

onto a tower. In tower-mounted scenarios, the RRU can be installed on a pole, U-steel, or angle

steel.

Prerequisites

When the RRU is powered by an AC/DC power module, you need to install the AC/DC power

module onto the RRU before hoisting them onto a tower. For detailed operations, see AC/DC

Power Module User Guide or OPM15M User Guide.

NOTICE

lDo not stand the RRU upright because the RF ports cannot support the weight of the RRU.

lPlace a foam pad or cardboard under the RRU to protect the RRU housing from damage

during the installation.

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 6-1. 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.

6 Hoisting an RRU and Related Cables onto a Tower

Issue () Huawei Proprietary and Confidential

Figure 6-1 Binding mounting kits for the RRU

(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 7.2.1 Installing a Single

RRU.

Step 5 Technician C binds the RRU using the lifting sling and traction sling, as shown in Figure 6-2.

The binding methods in Figure 6-3 and Figure 6-4 are incorrect.

6 Hoisting an RRU and Related Cables onto a Tower

Issue () Huawei Proprietary and Confidential

Figure 6-2 Binding the RRU

(1) Handle (2) Lifting sling (3) Traction eye (4) Traction sling

Figure 6-3 Incorrect binding method (1)

6 Hoisting an RRU and Related Cables onto a Tower

Issue () Huawei Proprietary and Confidential

Figure 6-4 Incorrect binding method (2)

Step 6 Hoist the RRU onto the tower, as shown in Figure 6-5. Technician B pulls the lifting sling

downwards, and technician C pulls the traction sling outwards to protect the RRU from colliding

with the tower.

Figure 6-5 Hoisting the RRU onto the tower

(1) Lifting sling (2) Fixed pulley (3) Traction sling

6 Hoisting an RRU and Related Cables onto a Tower

Issue () Huawei Proprietary and Confidential

NOTICE

lThe 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.).

lWhen hoisting each device onto a tower, protect them from colliding with the tower.

lHoist the RRU onto the tower before it is installed on a pole, angle steel, or U-steel.

lDo not hoist any thing by the traction eye.

Step 7 Technician A catches the RRU hoisted onto the tower.

Step 8 Technician A installs the RRU 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 7.2.1 Installing a Single

RRU.

Step 9 Untie the lifting sling and traction sling.

NOTE

The procedure for hoisting the RRU and its mounting kits onto the tower is for your reference only.

----End

6.2 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 8.1 Cabling Requirements.

Procedure

Step 1 Hoist the fiber optic cables onto the tower, as shown in Figure 6-6.

6 Hoisting an RRU and Related Cables onto a Tower

Issue () Huawei Proprietary and Confidential

Figure 6-6 Hoisting fiber optic cables onto the tower

(1) Lifting sling (2) Fixed pulley (3) Traction sling

NOTICE

Before hoisting fiber optic cables onto the tower, connect the fiber optic cables to the RRU 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 6-7.

6 Hoisting an RRU and Related Cables onto a Tower

Issue () Huawei Proprietary and Confidential

Figure 6-7 Binding fiber optic cables

(1) Lifting sling (2) Stretch sling (3) Traction sling

NOTICE

Do not remove the stretch sling and protection pipe or bind fiber optic cables using one

sling, as shown in Figure 6-8.

Figure 6-8 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.

6 Hoisting an RRU and Related Cables onto a Tower

Issue () Huawei Proprietary and Confidential

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.

NOTE

The procedure for hoisting the fiber optic cables onto the tower is for your reference only.

----End

6.3 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 8.1 Cabling Requirements.

The procedure for adding a connector to the RRU power cable on the RRU side is done under

the tower.

Procedure

Step 1 Hoist the power cables onto the tower, as shown in Figure 6-9.

Figure 6-9 Hoisting power cables onto the tower

(1) Lifting sling (2) Fixed pulley

6 Hoisting an RRU and Related Cables onto a Tower

Issue () Huawei Proprietary and Confidential

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 6-10.

NOTE

The connector on the power cable in the figure is only an example. The actual connector may vary

according to the situation.

Figure 6-10 Binding cable ties

3. Installation engineer B wraps the power cable connector with a layer of PVC insulation

tape, as shown in Figure 6-11.

NOTE

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.).

6 Hoisting an RRU and Related Cables onto a Tower

Issue () Huawei Proprietary and Confidential

Figure 6-11 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.

NOTE

The procedure for hoisting the power cables onto the tower is for your reference only.

----End

6 Hoisting an RRU and Related Cables onto a Tower

Issue () Huawei Proprietary and Confidential

7 Installing the RRU

About This Chapter

This chapter describes the procedure for installing the RRU. The procedure for installing the

RRU varies depending on installation options.

7.1 Mounting Kits for an RRU

This section describes the bracket assembly and the attachment plate for an RRU.

7.2 Installing the RRU on a Pole

One or more RRUs can be installed on a pole.

7.3 Installing an RRU on U-steel

This section describes the procedure and precautions for installing an RRU on U-steel. An RRU

can be installed on U-steel secured on the ground or a tower. Each piece of U-steel allows only

one RRU to be installed in standard mode.

7.4 Installing an RRU on Angle Steel

This section describes the procedure and precautions for installing an RRU on angle steel. An

RRU can be installed on angle steel secured on the ground or a tower. Each piece of angle steel

allows only one RRU to be installed in standard mode.

7.5 Installing an RRU on a Wall

This section describes the procedure and precautions for installing an RRU on a wall.

7.6 Installing an RRU on an IFS06

This section describes the procedure and precautions for installing an RRU on an IFS06.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

7.1 Mounting Kits for an RRU

This section describes the bracket assembly and the attachment plate for an RRU.

Figure 7-1 shows the front and side of an RRU.

Figure 7-1 Front and side view of an RRU

(1) Front view (2) Side view (3) Attachment plate

NOTE

When the operator faces the RRU whose handle and cabling cavity are on the right-hand side, the side

facing the operator is the front of the RRU.

Figure 7-2 shows the bracket assembly for an RRU.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-2 12 L blade RRU 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

7.2 Installing the RRU on a Pole

One or more RRUs can be installed on a pole.

7.2.1 Installing a Single RRU

This section describes the procedure and precautions for installing a single RRU on a pole.

Prerequisites

Before you install an RRU on a pole secured on a tower, the RRU and its mounting brackets are

hoisted onto the tower. For details, see 6.1 Hoisting an RRU onto a Tower.

The hoist clamp on the main bracket is secured properly.

NOTICE

lDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.

lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damage

during the installation.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Procedure

Step 1 Determine a position for installing the mounting brackets.

lIf the RRU is installed on a tower, determine a position for installing the mounting brackets

according to the instructions in 3.5.1 Clearance for a Single RRU.

lIf the RRU is installed on the ground, determine a position for installing the mounting

brackets according to Figure 7-3.

Figure 7-3 Distance between the mounting brackets and the ground

NOTE

As shown in the figure above, it is recommended that the mounting kits be installed at a position

1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient, only

the 3.5 Installation Clearance Requirements of an RRU needs to be provided.

Step 2 Install the RRU mounting brackets, as shown in Figure 7-4.

Figure 7-4 Installing the RRU mounting brackets

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

NOTE

Ensure that the arrows on the mounting brackets are pointing up.

1. Adjust the position of the nut and remove the square-neck bolt at the open end 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 7-5.

NOTICE

Tighten the nuts on the two square-neck bolts simultaneously. 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 7-5 Securing the RRU mounting brackets

Step 4 Install the RRU onto the main bracket, as shown in Figure 7-6.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-6 Installing the RRU 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 7-7.

Figure 7-7 Securing the captive screw into the connection hole

----End

7.2.2 Installing Two RRUs

This section describes the procedure and precautions for installing two RRUs on a pole.

Prerequisites

The hoist clamp on the main bracket is secured properly.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

NOTICE

lDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.

lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damage

during the installation.

Procedure

Step 1 Install the first RRU onto the main bracket, as shown in Figure 7-8. For details, see 7.2.1

Installing a Single RRU.

Figure 7-8 Installing the first RRU onto the main bracket

Step 2 Use an M6 inner hexagon screwdriver to loosen the four hex socket screws from the main bracket

and pole installation brackets on the second set of mounting brackets, and remove the main

bracket, as shown in Figure 7-9.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-9 Removing the RRU 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

7-10.

NOTICE

The second main bracket must be installed, with the open ends of U-shaped slots on both sides

facing downwards.

Figure 7-10 Installing the second main bracket

(1) Removed main bracket

NOTE

The main mounting bracket for installing a blade RRU can connect to the main mounting bracket for

installing a common RRU in the scenarios of adding RRUs, as shown in Figure 7-11.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-11 Connect to the main mounting bracket for installing a common RRU

(1) Main mounting bracket for a blade RRU (2) Main mounting bracket for a common RRU

Step 4 Install the second RRU onto the main bracket, as shown in Figure 7-12.

Figure 7-12 Installing the second RRU onto the main bracket

NOTICE

After installing each RRU 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 7-13

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-13 Securing the captive screw into the connection hole

Step 5 Install the sheet metal tab for fixing the neighboring RRUs, as shown in Figure 7-14.

Figure 7-14 Installing the sheet metal tab

(1) Screw (2) Sheet metal tab

1. Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab farther from the

handle of the second RRU and remove the screw.

2. Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab closer to the

handle of the second RRU. Then, rotate the sheet metal tab to align the vacant hole in the

sheet metal tab with a hole on the top of the first RRU.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

3. Insert the removed screw into the hole on the top of the first RRU and use an M6 torque

screwdriver to tighten the screw to 5 N·m (44.25 lbf·in.).

----End

7.2.3 Installing Three or More RRUs

This section describes the procedure and precautions for installing three or more RRUs on a

pole.

Prerequisites

The hoist clamp on the main bracket is secured properly.

NOTICE

lDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.

lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damage

during the installation.

Context

A pole supports three, four, or six RRUs. The procedures for installing them are the same. The

following provides an example for the procedure of installing four RRUs on a pole.

Procedure

Step 1 Install two RRUs, as shown in Figure 7-15. For detailed installation process, see 7.2.2 Installing

Two RRUs.

Figure 7-15 Two RRUs installed on a pole

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Step 2 Use an M6 inner hexagon screwdriver to loosen the four hex socket screws from the main bracket

and pole installation brackets on the second set of mounting brackets, and remove the main

bracket, as shown in Figure 7-16.

Figure 7-16 Removing the RRU main bracket

(1) Main bracket (2) Pole installation bracket

Step 3 Install the third main bracket and install the third RRU onto the third main bracket. Then, use

an inner hexagon torque screwdriver to tighten the captive screw into the holes on the top of the

attachment plate and main bracket for the RRU to 5 N·m (44.25 lbf·in.), as shown in Figure

7-17.

NOTICE

The third main bracket must be installed, with the open ends of U-shaped slots on both sides

facing downwards.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-17 Installing the third RRU onto the third main bracket

NOTE

The main mounting bracket for installing a blade RRU can connect to the main mounting bracket for

installing a common RRU in the scenarios of adding RRUs, as shown in Figure 7-18.

Figure 7-18 Connect to the main mounting bracket for installing a common RRU

(1) Main mounting bracket for a blade RRU (2) Main mounting bracket for a common RRU

Step 4 Install the sheet metal tab for fixing the neighboring RRUs, as shown in Figure 7-19.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-19 Installing the sheet metal tab

(1) Screw (2) Sheet metal tab

1. Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab farther from the

handle of the first RRU and remove the screw.

2. Use an M6 Phillips screwdriver to loosen the screw on the sheet metal tab closer to the

handle of the first RRU. Then, rotate the sheet metal tab to align the vacant hole in the sheet

metal tab with a hole on the top of the third RRU.

3. Insert the removed screw into the hole on the top of the third RRU 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 RRU mounting brackets at least 80 mm (3.15 in.) above or below the

first set of RRU mounting brackets, as shown in Figure 7-20.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-20 Installing the second set of RRU mounting brackets

Step 6 Install the fourth RRU onto the fourth main bracket, 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 7-21.

Figure 7-21 Installing the fourth RRU on the fourth main bracket

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

----End

7.3 Installing an RRU on U-steel

This section describes the procedure and precautions for installing an RRU on U-steel. An RRU

can be installed on U-steel secured on the ground or a tower. Each piece of U-steel allows only

one RRU to be installed in standard mode.

Prerequisites

Before you install an RRU on U-steel secured on a tower, the RRU and its mounting brackets

are hoisted onto the tower. For details, see 6.1 Hoisting an RRU onto a Tower.

The hoist clamp on the main bracket is secured properly.

NOTICE

lDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.

lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damage

during the installation.

Context

Figure 7-22 shows the top view of an RRU installed on U-steel.

NOTICE

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.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-22 Top view of an RRU

(1) U-steel

Procedure

Step 1 Determine a position for installing the mounting brackets.

lIf the RRU is installed on a tower, determine a position for installing the mounting brackets

according to the instructions in 3.5.1 Clearance for a Single RRU.

lIf the RRU is installed on the ground, determine a position for installing the mounting

brackets according to the instructions in Figure 7-23.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-23 Distance between the mounting brackets and the ground

NOTE

As shown in the figure above, it is recommended that the mounting kits be installed at a position

1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient, only

the 3.5 Installation Clearance Requirements of an RRU needs to be provided.

Step 2 Install the RRU mounting brackets, as shown in Figure 7-24.

Figure 7-24 Installing the RRU mounting brackets

NOTE

Ensure that the arrows on the mounting brackets are pointing up.

1. Adjust the position of the nut and remove the square-neck bolt at the open end 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.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

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 7-25.

NOTICE

Tighten the nuts on the two square-neck bolts simultaneously. 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 7-25 Securing the RRU mounting brackets

Step 4 Use an inner hexagon torque screwdriver to remove the attachment plate from one side of the

RRU, reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screws

to 5 N·m (44.25 lbf·in.), as shown in Figure 7-26.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-26 Installing the attachment plate onto the rear of the RRU

Step 5 Install the RRU onto the main bracket, as shown in Figure 7-27.

Figure 7-27 Installing the RRU onto the main bracket

Step 6 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 7-28.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-28 Securing the captive screw into the connection hole

----End

7.4 Installing an RRU on Angle Steel

This section describes the procedure and precautions for installing an RRU on angle steel. An

RRU can be installed on angle steel secured on the ground or a tower. Each piece of angle steel

allows only one RRU to be installed in standard mode.

Prerequisites

Before you install an RRU on U-steel secured on a tower, the RRU and its mounting brackets

are hoisted onto the tower. For details, see 6.1 Hoisting an RRU onto a Tower.

The hoist clamp on the main bracket is secured properly.

NOTICE

lDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.

lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damage

during the installation.

Context

Figure 7-29 shows the top view of an RRU installed on angle steel.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-29 Top view of an RRU

(1) Angle steel

Procedure

Step 1 Determine a position for installing the mounting brackets.

lIf the RRU is installed on angle steel secured on a tower, determine a position for installing

the mounting brackets according to the instructions in 3.5.1 Clearance for a Single

RRU.

lIf the RRU is installed on angle steel secured on the ground, determine a position for

installing the mounting brackets according to Figure 7-30.

Figure 7-30 Distance between the mounting brackets and the ground

NOTE

As shown in the figure above, it is recommended that the mounting kits be installed at a position

1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient, only

the 3.5 Installation Clearance Requirements of an RRU needs to be provided.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Step 2 Install the RRU mounting brackets, as shown in Figure 7-31.

Figure 7-31 Installing the RRU mounting brackets

NOTE

Ensure that the arrows on the mounting brackets are pointing up.

1. Adjust the position of the nut and remove the square-neck bolt at the open end 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 7-32.

NOTICE

Tighten the nuts on the two square-neck bolts synchronously. 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.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-32 Securing the RRU mounting brackets

Step 4 Use an inner hexagon torque screwdriver to remove the attachment plate from one side of the

RRU, reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screws

to 5 N·m (44.25 lbf·in.), as shown in Figure 7-33.

Figure 7-33 Installing the attachment plate onto the rear of the RRU

Step 5 Install the RRU onto the main bracket, as shown in Figure 7-34.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-34 Installing the RRU onto the main bracket

Step 6 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 7-35.

Figure 7-35 Securing the captive screw into the connection hole

----End

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

7.5 Installing an RRU on a Wall

This section describes the procedure and precautions for installing an RRU on a wall.

Prerequisites

The hoist clamp on the main bracket is secured properly.

NOTICE

lDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.

lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damage

during the installation.

Context

The wall on which RRUs are installed must meet the following requirements:

lFor each RRU, the wall must be able to bear a weight four times heavier than the RRU's

weight and the bolts' pulling force of 1.25 kN (281.25 lbf) vertical to the wall.

lExpansion bolts must be tightened to 30 N·m to ensure that the bolts work properly and the

wall remains intact.

Procedure

Step 1 Disassemble the RRU mounting brackets, as shown in Figure 7-36.

Figure 7-36 Disassembling the RRU 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 screw cap

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

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 screw 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 wall, 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

7-37.

Figure 7-37 Marking anchor points

(1) Level (2) Pole installation bracket (3) RRU

NOTE

As shown in the figure above, it is recommended that the pole installation bracket be installed at a position

1200 mm (47.24 in.) to 1600 mm (59.06 in.) high above the ground. If the space is insufficient, only the

3.5 Installation Clearance Requirements of an RRU needs to be provided.

Step 3 Drill holes at the anchor points, and then insert expansion anchor bolts, as shown in Figure

7-38.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-38 Drilling holes and inserting expansion anchor bolts

(1) M10×80 bolt (2) Nut (3) Spring washer (4) Flat washer (5) Expansion sleeve

1. Use a hammer drill with a Ф12 bit to drill holes vertically at the marked anchor points with

the depth ranging from 55 mm (2.17 in.) to 60 mm (2.36 in.), use a vacuum cleaner to clear

the dust out from inside and around the holes, and measure the distances between holes. If

any of the hole is beyond the acceptable range, mark a new anchor point and drill a new

hole.

NOTICE

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 into the hole completely.

4. Tighten and then loosen the expansion bolt, and remove the M10 bolt, spring washer, and

flat washer in sequence.

NOTICE

After dismantling an expansion anchor bolt, ensure that the top of the expansion sleeve 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 7-39.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-39 Installing the pole installation bracket on the expansion anchor bolts

NOTICE

Ensure that the arrows on the pole installation bracket are pointing up.

Step 5 Install the main bracket onto the pole installation bracket using four M6x16 inner hexagon

screws, and use an inner hexagon torque screwdriver to tighten the 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 7-40.

Figure 7-40 Installing the main bracket

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

(1) Main bracket (2) Pole installation bracket

Step 6 Use an inner hexagon torque screwdriver to remove the attachment plate from one side of the

RRU, reinstall the attachment plate onto the rear of the RRU, and tighten the four stainless screws

to 5 N·m (44.25 lbf·in.), as shown in Figure 7-41.

Figure 7-41 Installing the attachment plate onto the rear of the RRU

Step 7 Install the RRU onto the main bracket, as shown in Figure 7-42.

Figure 7-42 Installing the RRU onto the main bracket

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Step 8 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 7-43.

Figure 7-43 Securing the captive screw into the connection hole

----End

7.6 Installing an RRU on an IFS06

This section describes the procedure and precautions for installing an RRU on an IFS06.

Prerequisites

The hoist clamp on the main bracket is secured properly.

NOTICE

lDo not stand an RRU upright because the RF ports cannot support the weight of the RRU.

lPlace a foam pad or cardboard under an RRU to protect the RRU housing from damage

during the installation.

Context

lThe upper and lower adjustable beams on an IFS06 can be moved up and down to fit for

heights of RRUs.

lRRUs can be installed on an IFS06 when the ambient temperature is higher than or equal

to the lowest operating temperature of the RRUs and at least 5°C (41°F) lower than the

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

highest working temperature of the RRU. In this scenario, the IFS06 supports at least three

RRUs. The IFS06 supports a maximum of six RRUs when the ambient temperature is higher

than or equal to the lowest operating temperature of the RRUs and at least 10°C (50°F)

lower than the highest operating temperature of the RRU.

NOTE

For details about the operating temperature of the RRUs, see section "Technical Specifications of

RRUs" in 3900 Series Base Station Technical Description.

lInstall RRUs in the sequence from bottom to top and from left to right.

lThis section describes how to install an RRU in height-unrestricted scenarios. The

procedure for installing an RRU in height-restricted scenarios is the same as that in height-

unrestricted scenarios.

lWhen installing the pole installation bracket, you need to use the M10x50 bolts delivered

with the IFS06.

lRubber washers are easily compressed or broken, whereas do not need to be replaced.

Procedure

Step 1 Disassemble the RRU mounting brackets, as shown in Figure 7-44.

Figure 7-44 Disassembling the RRU 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 screw 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 screw cap, nuts, spring washers, flat washers, square-neck bolts, and pole

installation bracket from the auxiliary bracket.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

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.).

NOTICE

Ensure that the arrows on the pole installation bracket are pointing up.

Install the pole installation bracket, as shown in Figure 7-45.

Figure 7-45 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 7-46.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-46 Installing the main bracket

(1) Main bracket (2) Pole installation bracket

Step 4 Attach the RRU 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 7-47.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-47 Installing the RRU onto the main bracket

Step 5 Install the RRUs on the lower level from left to right, as shown in Figure 7-48.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-48 Installing RRUs on the lower level

Step 6 Optional: Optional: When the ambient temperature is equal to or higher than the lowest

operating temperature of the RRU and at least 10°C (10°F) lower than the highest operating

temperature of the RRU, repeat the preceding steps to install the RRUs on the higher level, as

shown in Figure 7-49.

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

Figure 7-49 Installing RRUs on the higher level

----End

7 Installing the RRU

Issue () Huawei Proprietary and Confidential

8 Installing RRU Cables

About This Chapter

This chapter describes the procedure for installing RRU cables.

8.1 Cabling Requirements

Cables must be laid out according to the specified cabling requirements to prevent signal

interference.

8.2 RRU Cable Connections

This section describes RRU cable connections.

8.3 Installing RRU Cables

This chapter describes the procedure for installing RRU cables.

8.4 RRU Cables

This section describes RRU cable connections.

8.5 Installing an RRU PGND Cable

This section describes the procedure for installing an RRU PGND cable.

8.6 Installing an RRU RF Jumper

This section describes the procedure for installing an RRU RF jumper.

8.7 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable

This section describes the procedures for installing an RRU AISG multi-wire cable and AISG

extension cable.

8.8 Installing an RRU Alarm Cable

This section describes the procedure for installing an RRU alarm cable.

8.9 Opening the Cover Plate of an RRU Cabling Cavity

This section describes the procedure for opening the cover plate of an RRU cabling cavity.

8.10 Installing a CPRI Optical Cable

This section describes the procedure for installing a CPRI optical cable.

8.11 Installing an RRU Power Cable

This section describes the procedure for installing an RRU power cable.

8.12 Closing the Cover Plate of an RRU Cabling Cavity

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

This section describes the procedure for closing the cover plate of an RRU cabling cavity.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

8.1 Cabling Requirements

Cables must be laid out according to the specified cabling requirements to prevent signal

interference.

NOTE

If a cable listed below is not required, skip the cabling requirements of the cable.

General Cabling Requirements

Bending radius requirements

lThe bending radius of a 7/8'' feeder must be greater than 250 mm (9.84 in.), and the bending

radius of a 5/4'' feeder must be greater than 380 mm (14.96 in.).

lThe bending radius of a 1/4'' jumper must be greater than 35 mm (1.38 in.). The bending

radius of a super-flexible 1/2'' jumper must be greater than 50 mm (1.97 in.), and the bending

radius of an ordinary 1/2'' jumper must be greater than 127 mm (5 in.).

lThe bending radius of a power cable or PGND cable must be at least three times its diameter.

lThe bending radius of a fiber optic cable is at least 20 times of its diameter, and the bending

radius of a breakout cable is at least 30 mm (1.18 in.).

lThe bending radius of an E1/T1 cable must be at least three times its diameter.

lThe bending radius of a signal cable must be at least five times its diameter.

Cable binding requirements

lCables of the same type must be bound together.

lDifferent types of cables must be separately laid out and bound, with a minimum distance

of 30 mm (1.18 in.) from each other.

lThe cables must be bound tightly and neatly. The sheaths of the cables must not be damaged.

lThe cable ties must face the same direction, and those at the same horizontal line must be

in a straight line.

lThe excess of the indoor cable ties is cut off. The excess of 5 mm (0.197 in.) of the outdoor

cable ties is reserved, and the cut surfaces are smooth without sharp edges.

lAfter cables are installed, labels or nameplates must be attached to the cables at their ends,

curves, and interconnection positions.

Security requirements

lWhen routing cables, avoid sharp objects, for example sharp edges on the wall. If necessary,

use tubes to protect the cables.

lWhen routing cables, keep the cables away from heat sources and use heat insulation

materials to insulate the cables from the heat sources.

lReserve a proper distance (0.1 m or 3.937 in. is recommended) between equipment and

cables especially at the cable curves to protect the cables and equipment.

Indoor cabling requirements

lRoute each cable into the room through the feeder window.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

lReserve drip loops for all cables outside the feeder window before routing them into the

room. Ensure that the radiuses of the drip loops are greater than or equal to the minimum

bending radiuses of the cables.

lWhen routing a cable into the room, ensure that a person is assisting you in the room.

lApply waterproof treatment to the feeder window.

Outdoor Cabling Requirements

lAfter being connected to a ground clip on power cables, a ground cable must be routed

downwards to prevent water from entering the equipment to which the power cables

connect.

lProtect outdoor cables against potential damage. For example, put the cables through tubes.

lThe cables to be protected include AC power cables, transmission cables, and cables laid

out underground.

lWhen routing cables through tubes on the ground below the cabinet, put a 30 mm to 50

mm (1.18 in. to 1.97 in.) length of the tubes into the base of the cabinet but do not put the

tubes into the cabinet. Use waterproof tape or waterproof silicon gel to block both ends of

the tubes and use sheet metal tabs to secure the tubes to the cable holes in the base.

lWhen routing cables through tubes along a metal cable trough below the cabinet, do not

put the tubes into the base of the cabinet but cover the cable trough and connect the tubes

to the cable holes in the base.

lWhen routing RRU cables, ensure that the highest positions of the routes of all RRU cables

(except RF cables and AISG cables) must be lower than the bottom of the RRU.

lUse clips to secure cables outdoors. For the method of installing a clip, see the installation

guide delivered with the clip.

lArrange cables neatly along the routing direction and use clips to secure the cables.

lDetermine the positions where the clips are installed according to the actual situation. For

example, 7/8" feeders are secured with clips at an interval of 1.5 m to 2 m (4.92 ft to 6.56

ft), CPRI fiber optic cables and power cables are secured with clips at an interval of 1 m

to 1.5 m (3.28 ft to 4.92 ft). Ensure that the clips are evenly spaced and in the same direction.

lWhen fastening cables with a clip, ensure that the cables are aligned neatly and are routed

through the holes in the clip. Do not stretch the cables too tightly.

NOTE

There are two types of clips: 3-hole clip and 6-hole clip, which are described as follows:

lA 3-hole clip is shown by illustration a in the following figure. It is often used to fasten feeders.

lA 6-hole clip is shown by illustration b in the following figure. It is often used to fasten power cables and

CPRI fiber optic cables.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

Figure 8-1 Exterior of the clips

(1) Cable hole for feeders (2) Cable hole for fiber optic cables (3) Cable hole for power cables

The following figure shows the cables secured on a cable tray.

Figure 8-2 Cables secured on a cable tray

(1) 3-hole clip (2) 6-hole clip

The following figure shows the cables secured on a tower.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

Figure 8-3 Cables secured on a tower

(1) 3-hole clip (2) 6-hole clip

Special Cabling Requirements

Cabling of power cables

lPower cables must be installed in the position specified in engineering design documents.

lIf the length of power cables is insufficient, replace the cables rather than adding connectors

or soldering joints to lengthen the cables.

lCables can only be laid out under well-planned instructions. The cabling activities of fiber

optic cables are allowed only when qualified personnel and communication facilities are

available.

lDo not circle and twist cables.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

lAfter routing a DC power cable onto the platform on a tower, route it along the shortest

path to the rails surrounding the platform, and route it along the inside of the rails.

lAfter routing a DC power cable close to the equipment on a tower, use clips to secure the

power cable onto a pole or the rails surrounding the platform. Ensure that there is no

excessively long distance between the equipment and the position where the power cable

is secured.

Cabling of PGND cables

lPGND cables for a base station must be connected to the same group of ground bars.

lPGND cables must be buried in the ground or routed indoors.

lThe external conductor 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.

lPGND cables and signal cables must be installed separately. A certain distance must be

reserved between them to prevent interference from each other.

lSwitches or fuses must not be installed on the PGND cables.

lOther devices must not be used for electrical connections of the PGND cables.

lAll the metal parts in the housing of the equipment must be reliably connected to the ground

terminal.

Cabling of E1 cables

lE1 cables must not cross power cables, PGND cables, or RF cables when laid out. If

transmission cables are laid out with power cables, PGND cables, or RF cables in parallel,

the spacing between them must be greater than 30 mm (1.18 in.).

lE1 cables are lined up straight and bound neatly with cable ties.

lSufficient slack is provided for E1 cables at turns.

lE1 cables must not be pressed by the door of the cabinet when routed, as shown in the

following figure.

Figure 8-4 E1 cables routed in the cabinet

Cabling of fiber optic cables

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

lAt least three people are required for laying out fiber optic cables. The cabling activities

of fiber optic cables are allowed only when qualified personnel and communication

facilities are available.

lThe operating temperature of fiber optic cables ranges from -40ºC to +60ºC (-40ºF to

+140ºF). If the actual temperature is beyond this range, take protective measures or select

another route.

lDo not circle and twist cables.

lDo not bind a fiber optic cable at the position where it bends.

lDo not stretch, step on, or place heavy objects on fiber optic cables. Keep the fiber optic

cables away from sharp objects.

lWhen fiber optic cables are routed, the excess of the fiber optic cables must be coiled around

special devices, such as a fiber coiler.

lAn 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 8-5 Binding fiber optic cables

lWhen coiling fiber optic cables, apply even strength. Do not bend the fiber optic cables

with force.

lUnused optical connectors must be covered with dustproof caps.

lThe fiber optic cables must not be pressed by the door of the cabinet when routed, as shown

in the following figures.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

Figure 8-6 CPRI fiber optic cables routed in the cabinet (1)

Figure 8-7 CPRI fiber optic cables routed in the cabinet (2)

Figure 8-8 FE/GE fiber optic cables routed in the cabinet

lAfter routing a fiber optic cable onto the platform on a tower, route it along the shortest

path to the rails surrounding the platform, and route it along the inside of the rails.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

lAfter routing a fiber optic cable close to the equipment on a tower, use clips to secure the

fiber optic cable onto a pole or the rails surrounding the platform. Ensure that there is no

excessively long distance between the equipment and the position where the cable is

secured.

lCoil the excess of the fiber optic cables near the equipment on the tower before securing

the cables on the tower.

8.2 RRU Cable Connections

This section describes RRU cable connections.

NOTE

The RRU does not support power cable cascading.

Figure 8-9 shows the cable connections of a single-mode RRU.

Figure 8-9 Cable connections of a single-mode RRU

(1) RRU PGND cable (2) RRU RF jumper (3) RRU AISG multi-wire cable

(4) RRU AISG extension cable (5) RRU power cable (6) CPRI optical fiber

(7) RRU alarm cable - -

Figure 8-10 shows the cable connections of a multimode RRU.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

Figure 8-10 Cable connections of a multimode RRU

(1) RRU PGND cable (2) RRU RF jumper (3) RRU AISG multi-wire cable

(4) RRU AISG extension cable (5) RRU power cable (6) CPRI optical fiber

(7) RRU alarm cable - -

Figure 8-11 shows the cable connections of multiple single-mode RRUs.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

Figure 8-11 Cable connections of multiple single-mode RRUs

(1) RRU PGND cable (2) RRU RF jumper (3) RRU power cable

(4) CPRI optical fiber - -

Figure 8-12 shows the cable connections of multiple multimode RRUs.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

Figure 8-12 Cable connections of multiple multimode RRUs

8.3 Installing RRU Cables

This chapter describes the procedure for installing RRU cables.

Figure 8-13 shows the procedure for installing RRU cables.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

Figure 8-13 Procedure for installing RRU cables

8.4 RRU Cables

This section describes RRU cable connections.

Table 8-1 lists RRU cables.

Table 8-1 RRU cables

Cable One End The Other End

Connector Installation

Position

Connector Installation

Position

RRU PGND

Cable

OT terminal

(M6, 16 mm2 or

0.025 in.2)

Ground

terminal on the

RRU

OT terminal

(M8, 16 mm2 or

0.025 in.2)

Ground terminal

on the ground

bar

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

Cable One End The Other End

Connector Installation

Position

Connector Installation

Position

RRU Power

Cable

Tool-less female

connector

(pressfit type)

NEG(-) and

RTN(+) ports

on the RRU

Depending on

the power

supply

equipment

External power

equipment

RRU Alarm

Cable

DB15 male

connector

EXT_ALM

port on the

RRU

Cord end

terminal

External alarm

device

CPRI Fiber

Optic Cable

DLC connector CPRI0 port on

the RRU

DLC connector CPRI port on a

board in the

BBU

RRU RF Jumper 4.3-10 straight

male connector

RF ports on the

RRU

4.3-10 straight

male connector

Antenna system

RRU AISG

Multi-Wire

Cable

DB9 waterproof

male connector

RET port on

the RRU

Standard AISG

female

connector

Standard AISG

male connector

on the RCU or on

the AISG

extension cable

RRU 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

8.5 Installing an RRU PGND Cable

This section describes the procedure for installing an RRU PGND cable.

Context

The cross-sectional area of an RRU 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.

DANGER

Install RRU PGND cables by strictly following the following operations. Otherwise, damage to

the RRU or personal injury may occur.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

Procedure

Step 1 According to the actual cable route, cut the PGND cable into a proper length to prepare an RRU

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 RRU PGND cable.

Connect the M6 OT terminal of the RRU PGND cable to a ground terminal at the RRU bottom

and the M8 OT terminal to the external ground bar, as shown in Figure 8-14.

Figure 8-14 Installing an RRU PGND cable

(1) Ground terminal 1 (2) Ground terminal 2

NOTE

lSelect a ground terminal according to site conditions. When RRUs are installed in standard mode,

ground terminal 1 is recommended, as shown in A of Figure 8-14. When RRUs are installed in side-

mounted mode, ground terminal 2 is recommended, as shown in B of Figure 8-14.

lWhen the RRU PGND cable uses OT terminals with two holes, use two screws to tighten the OT

terminals. Therefore, when installing a PGND cable on a ground terminal, remove the screws on the

other ground terminal before installing the RRU.

lCrimp OT terminals in correct positions, as shown in Figure 8-15.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

100

Figure 8-15 Correct position of an OT terminal

Step 3 Label the installed cable according to the instructions in Attaching a Cable-Tying Label.

----End

8.6 Installing an RRU RF Jumper

This section describes the procedure for installing an RRU RF jumper.

Procedure

Step 1 Connect the 4.3-10 straight male connector on the RRU RF jumper to the antenna port, and use

a torque wrench to tighten the connector to 5 N·m (44.25 lbf·in.), as shown in Figure 8-16.

Figure 8-16 Installing an RRU RF jumper

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

101

NOTICE

On AC-powered electric railways, such as high-speed railways, when leaky cables are connected

to RRUs installed in tunnels, high-voltage-resistance DC blocks must be installed between RRU

RF jumpers and the leaky cables to protect the RRUs against damage.

Step 2 Connect 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 8-17.

Figure 8-17 Waterproofing a connector of the RF jumper

(1) Waterproof tape (2) PVC insulation tape

NOTE

lBefore wrapping waterproof tape, stretch the tape evenly until the length of the tape becomes twice its

original length.

lDo not stretch the PVC insulation tape when wrapping the PVC insulation tape.

lWrap 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.

lEnsure that the adhesive surface of the tape overlaps the lower layer.

lWhen 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

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

102

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 8-18.

NOTICE

Do not remove dustproof caps from vacant antenna connectors.

Figure 8-18 Waterproofing a dustproof cap

(1) Dustproof cap (2) Waterproof tape (3) PVC insulation tape

NOTE

lBefore wrapping waterproof tape, stretch the tape evenly until the length of the tape becomes twice its

original length.

lDo not stretch the PVC insulation tape when wrapping the PVC insulation tape.

lWrap 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.

lEnsure that the adhesive surface of the tape overlaps the lower layer.

lWhen 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.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

103

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 8.1 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

8.7 Installing an RRU AISG Multi-Wire Cable and AISG

Extension Cable

This section describes the procedures for installing an RRU AISG multi-wire cable and AISG

extension cable.

Context

When the distance between an RRU 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 RRU and the RCU. In this case,

an AISG extension cable is used to extend the AISG multi-wire cable.

Procedure

lInstall 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 RRU bottom, as shown in Figure 8-19.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

104

Figure 8-19 Installing an RRU 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 8.1 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.

lInstall 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.

2. Link the waterproofed DB9 connector at one end of the AISG multi-wire cable to the

RET port on the RRU bottom, and link the other end to the standard AISG male

connector of the AISG extension cable, as shown in Figure 8-20.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

105

Figure 8-20 Installing an RRU 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 8-21.

Figure 8-21 Installing an RRU AISG extension cable

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

106

5. Route the cables according to the instructions in 8.1 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

8.8 Installing an RRU Alarm Cable

This section describes the procedure for installing an RRU 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 RRU alarm cable to the

EXT_ALM port on the RRU, as shown in Figure 8-22.

Figure 8-22 Installing an RRU alarm cable

NOTE

Install the waterproof DB15 male connector on the RRU 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.).

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

107

Step 4 Connect the eight cord end terminals at the other end to external alarm devices.

NOTE

lRemove insulated protective tubes from the cord end terminals before connecting the cord end terminals to

devices, as shown in Figure 8-23.

lUse 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 8-24 shows the method for handling cord end terminals not in use.

Figure 8-23 Removing insulated protective tubes from the cord end terminals

Figure 8-24 Method for handling cord end terminals that are not in use

Step 5 Route the cables according to the instructions in 8.1 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

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

108

8.9 Opening the Cover Plate of an RRU Cabling Cavity

This section describes the procedure for opening the cover plate of an RRU cabling cavity.

Procedure

Step 1 Wear ESD gloves.

NOTICE

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 M4 Phillips screwdriver to rotate the locking screw on the cover plate on the cabling

cavity 90 degrees and pull the handle outwards to open the RRU cabling cavity, as shown in

Figure 8-25.

Figure 8-25 Opening the cover plate of the RRU cabling cavity

(1) Locking screw

Figure 8-26 shows the internal structure of the cabling cavity.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

109

Figure 8-26 RRU cabling cavity

(1) Cover plate of the cabling cavity (2) Cabling cavity (3) Label for preparing the power cable

(4) Cable clip (5) Power cable trough (6) Waterproof block

(7) Optical cable trough - -

Step 3 Remove the waterproof block.

NOTE

Remove only the waterproof blocks for the cables to be installed.

----End

8.10 Installing a CPRI Optical Cable

This section describes the procedure for installing a CPRI optical cable.

Prerequisites

Before the installation, single-mode optical modules can be distinguished from multimode

optical modules in either of the following ways:

lSM and MM labels on an optical module: SM indicates a single-mode optical module, and

MM indicates a multimode optical module.

lColor of the puller on an optical module: Blue indicates a single-mode optical module, and

black or gray indicates a multimode optical module.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

110

NOTICE

The optical modules to be installed must match CPRI rates.

Context

lA CPRI optical cable transmits CPRI signals between a BBU and an RRU.

Procedure

Step 1 Lower the pullers of two optical modules, insert one optical module into the CPRI0 port on the

RRU and the other optical module into the CPRI port on the BBU, and raise the pullers, as shown

in Figure 8-27.

Figure 8-27 Installing an optical module

NOTICE

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 optical cable to the optical module on the RRU side,

as shown in Figure 8-28.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

111

Figure 8-28 Installing a CPRI optical cable

NOTICE

To avoid any damage to optical cables, the cables connected to the RRU must be installed

according to the installation process. For details about the installation process, see 8.3 Installing

RRU Cables.

Step 3 Connect the end labeled 2A and 2B of the optical cable to the optical module on the BBU side.

Step 4 Route the cables according to the instructions in 8.1 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

8.11 Installing an RRU Power Cable

This section describes the procedure for installing an RRU power cable.

Prerequisites

lA tool-less female connector (pressfit type) is added to the RRU power cable on the RRU

side. For details, see 11.1 Adding a Tool-Less Female Connector (Pressfit Type) to the

RRU Power Cable on the RRU Side.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

112

lA connector or OT terminals are added to the RRU power cable on the power device side.

For details, see 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 20 A to 30 A.

Table 8-2 describes the RRU power cable.

Table 8-2 RRU power cable

Cable On the RRU

Side

On the

Power

Device Side

Pow

Devi

Color

RRU

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

lNorth American standards: The

RTN(+) wire is black and the

NEG(-) wire is blue.

lEuropean standards: The RTN

(+) wire is brown and the NEG

(-) wire is blue.

DCD

U-11

EPC5

connector

DCD

U-12

CAUTION

lBefore installing the RRU power cable, ensure that the upper-level circuit breaker is

switched off and the power cable has no voltage.

lA drip loop is required for the position between the RRU port and the cable, preventing

rain from damaging the RRU.

lWhen installing the RRU power cable, connect the power cable to the RRU connector first

and then to the power equipment connector. Incorrect connection sequence or reverse

connection of positive and negative poles may damage the RRU or cause personal injury.

Procedure

Step 1 Connect the tool-less female connector (pressfit type) at one end of the RRU power cable to the

power supply socket on the RRU, as shown in Figure 8-29.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

113

Figure 8-29 Installing an RRU power cable

NOTICE

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 RRU power cable to the corresponding position

on the power device.

NOTE

lA DCDU-11B/DCDU-12B can supply power to a maximum of six RRUs. Ensure that the RRU power

cable is connected to one of LOAD0 to LOAD5 ports on the DCDU-11B/DCDU-12B.

lOne EPU can supply power to a maximum of six RRUs. Ensure that the RRU power cable is connected

to one of RRU0 to RRU5 ports on the EPU.

lWhen the RRU 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.

Step 3 Route the cables according to the instructions in 8.1 Cabling Requirements, and then use cable

ties to bind the cables.

Step 4 Label the installed cables according to the instructions in Attaching a Cable-Tying Label.

----End

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

114

8.12 Closing the Cover Plate of an RRU Cabling Cavity

This section describes the procedure for closing the cover plate of an RRU cabling cavity.

Procedure

Step 1 Fasten the cables using clips, as shown in Figure 8-30.

NOTICE

Ensure that the exposed shield layer of the power cable is properly tightened using the clip.

Figure 8-30 Fastening cables using clips

Step 2 Insert waterproof blocks into vacant cable troughs in the cabling cavity, as shown in Figure

8-31.

NOTICE

Ensure that cables and waterproof blocks are properly inserted into troughs.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

115

Figure 8-31 Correct placement of waterproof blocks

Step 3 Push the handle to close the cover plate on the cabling cavity and use an M4 torque screwdriver

to rotate the locking screw on the cover plate on the cabling cavity 90 degrees to ensure that the

cover plate is locked, as shown in Figure 8-32.

NOTICE

The RRU cabling cavity must be securely tightened to prevent water.

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

116

Figure 8-32 Closing the cover plate of an RRU cabling cavity

Step 4 Take off the ESD gloves, and pack up all the tools.

----End

8 Installing RRU Cables

Issue () Huawei Proprietary and Confidential

117

9 Checking the RRU Hardware Installation

After an RRU is installed, check the hardware installation.

Table 9-1 provides the checklist for the RRU hardware installation.

Table 9-1 Checklist for the RRU hardware installation

SN Item

1The position for each device conforms to the engineering drawing and meets the

space requirement. Sufficient space is reserved for equipment maintenance.

2 The RRU is securely installed.

3 The cover plate is securely installed on the RRU cabling cavity.

4 Waterproof blocks are securely installed in vacant cable troughs of the RRU 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.

5 There are no connectors or joints on each power cable or PGND cable.

6 The terminals at two ends of each power cable or PGND cable are securely soldered

or crimped.

7 None of power cables and PGND cables can be short-circuited or reversely

connected. In addition, these cables are not damaged or broken.

8 Power cables and PGND cables are separately bound from other cables.

9 The protection grounding of the RRU 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.

12 All ground cables are properly grounded.

9 Checking the RRU Hardware Installation

Issue () Huawei Proprietary and Confidential

118

10 Powering On an RRU

After all the devices are installed, check the power-on status of an RRU.

NOTICE

After you unpack an RRU, you must power on it within 24 hours. If you power off the RRU for

maintenance, you must restore power to the RRU within 24 hours.

Figure 10-1 shows the RRU power-on check process.

NOTE

For details about how to power on an RRU, see Powering On an RRU. For details about how to power off

an RRU, see section "Powering-Off the RRU" in RRU Maintenance Guide.

10 Powering On an RRU

Issue () Huawei Proprietary and Confidential

119

Figure 10-1 RRU power-on check process

(a) The normal input voltage of an RRU 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 RRU is on for 1s and off for 1s. The ALM indicator is steady off.

10 Powering On an RRU

Issue () Huawei Proprietary and Confidential

120

11 Appendix

About This Chapter

11.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the

RRU Side

This section describes the procedure for adding a tool-less female connector (pressfit type) to

the RRU power cable on the RRU side.

11 Appendix

Issue () Huawei Proprietary and Confidential

121

11.1 Adding a Tool-Less Female Connector (Pressfit Type)

to the RRU Power Cable on the RRU Side

This section describes the procedure for adding a tool-less female connector (pressfit type) to

the RRU power cable on the RRU side.

Context

Figure 11-1 shows the cable diagram on labels.

Figure 11-1 Cable diagram on labels

(1) Cable diagram on labels

NOTICE

Prepare a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU

Side by strictly following the following operations. Otherwise, damage to the RRU or personal

injury may occur.

Procedure

Step 1 Determine the length of the power cable for different operations based on the labels, as shown

in Figure 11-2.

11 Appendix

Issue () Huawei Proprietary and Confidential

122

Figure 11-2 Determining the length of the power cable

Step 2 Strip the specified length of the sheath off the power cable, as shown in Figure 11-3.

Figure 11-3 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 11-4.

Figure 11-4 Stripping the sheath off each core wire

Figure 11-5 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 11-6.

11 Appendix

Issue () Huawei Proprietary and Confidential

123

Figure 11-6 Tightening screws

2. 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 11-7.

DANGER

Do not reversely connect the positive and negative poles. Reverse connection of positive

and negative poles may result in equipment malfunctions or personal injury. Therefore,

check the power cable connection before powering on the RRU.

Figure 11-7 Adding a tool-less female connector (pressfit type) to two core wires

3. After the core wires are installed, ensure that each core wire is securely installed after being

dragged with a torque of 30 N•m and all copper wires are inserted in the connector terminal

socket.

Step 5 Strip the specified length of the sheath off the power cable to expose the intact shield layer, as

shown in Figure 11-8.

11 Appendix

Issue () Huawei Proprietary and Confidential

124

Figure 11-8 Stripping the sheath off the power cable

NOTICE

Each core wire is exposed outside the tool-less female connector (pressfit type) for 1.5 mm

(0.059 [in.]), as shown in Figure 11-9.

Figure 11-9 Inserting core wires into the tool-less female connector (pressfit type)

----End

11 Appendix

Issue () Huawei Proprietary and Confidential

125

Huawei Technologies RRU3971PCS Remote Radio Unit User Manual Installation Guide

Huawei Technologies Co.,Ltd Remote Radio Unit Installation Guide

Contents

Installation Guide

Navigation menu

Namespaces

Views

Navigation