Huawei Technologies RRU3261 Remote Radio Unit User Manual Installation Guide

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RRU3261

Installation Guide

Issue Draft A

Date 2015-07-24

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

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About This Document

Purpose

This document describes the process of installing a DC blade RRU3261 (referred to as RRU in

this document).

Product Version

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

Product Name Solution Version Product Version

DBS3900 lSRAN9.0

leRAN7.0

V100R009C00

lSRAN10.1 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 the RRU3261 Installation Guide

This chapter describes the changes in the RRU3261 Installation Guide.

2 Installation Preparations

This chapter describes the reference documents, tools, and instruments that must be ready before

the installation. In addition, it specifies the skills and prerequisites that installation engineers

must have.

3 Information About the Installation

RRU3261

Installation Guide About This Document

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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 the RRU.

6 Installing the RRU

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

RRU varies depending on installation options.

7 Installing RRU Cables

This chapter describes the procedure for installing RRU cables.

8 Checking the RRU Hardware Installation

9 Powering On an RRU

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

10 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.

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.

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iii

Symbol Description

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.

{ 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

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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.

Drag Press and hold the primary mouse button and move the

pointer to a certain position.

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Contents

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

1 Changes in the RRU3261 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 Options.......................................................................................................................................................12

3.5 Installation Clearance Requirements of an RRU..........................................................................................................14

3.5.1 Installation Clearance for Multiple RRUs.................................................................................................................14

3.5.2 Installation Spacing Between RRUs..........................................................................................................................16

4 Unpacking the Equipment.........................................................................................................17

5 Installation Process.....................................................................................................................19

6 Installing the RRU.......................................................................................................................21

6.1 Mounting Kits for an RRU...........................................................................................................................................22

6.2 Installing the RRU on a Pole........................................................................................................................................22

6.3 Installing the RRU on a Tower.....................................................................................................................................26

7 Installing RRU Cables................................................................................................................32

7.1 Cabling Requirements..................................................................................................................................................34

7.2 RRU Cable Connections...............................................................................................................................................40

7.3 Installing RRU Cables..................................................................................................................................................42

7.4 RRU Cables..................................................................................................................................................................43

7.5 Installing an RRU PGND Cable...................................................................................................................................44

7.6 Installing an RRU RF Jumper......................................................................................................................................46

7.7 Installing an RRU AISG Multi-Wire Cable and AISG Extension Cable.....................................................................49

7.8 Installing an RRU Alarm Cable....................................................................................................................................51

7.9 Opening the Cover Plate of an RRU Cabling Cavity...................................................................................................53

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7.10 Installing a CPRI Optical Cable.................................................................................................................................55

7.11 Installing an RRU Power Cable..................................................................................................................................57

7.12 Closing the Cover Plate of an RRU Cabling Cavity..................................................................................................59

8 Checking the RRU Hardware Installation..............................................................................63

9 Powering On an RRU.................................................................................................................64

10 Appendix.....................................................................................................................................66

10.1 Adding a Tool-Less Female Connector (Pressfit Type) to the RRU Power Cable on the RRU Side........................67

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1 Changes in the RRU3261 Installation Guide

This chapter describes the changes in the RRU3261 Installation Guide.

Draft A (2015-07-24)

This is a draft.

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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.

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2.1 Reference Documents

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

The following reference documents are required during RRU installation:

lRRU3261 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

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Utility knife Cable cutter Adjustable wrench (size ≥ 32

mm [1.26 in.])

Torque wrench

Size: 18 mm (0.71 in.) and 32

mm (1.26 in.)

Combination wrench

Size: 18 mm (0.71 in.) and 32

mm (1.26 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 Lifting sling

Hydraulic pliers - -

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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.

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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 Options

This section describes RRU installation options. RRU installation supports the centralized mode.

3.5 Installation Clearance Requirements of an RRU

This section describes the requirements for the installation clearance of multiple RRUs and the

requirements for the installation spacing between RRUs.

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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

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

label on the cover plate and obtain the RRU name from the nameplate on the side of RRU that

accommodates the conversion bracket. Figure 3-3 shows the positions of the configuration label

and nameplate on the RRU.

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NOTE

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

Figure 3-3 Positions of the label and nameplate

(1) Configuration label (2) Nameplate (3) Frequency band

(4) Power supply module (5) Module name -

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.

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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) Bottom ports ANT_TX/RXA TX/RX port A, supporting RET signal

transmission

ANT_TX/RXC TX/RX port C

ANT_TX/RXD TX/RX port D

ANT_TX/RXB 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

(2) Ports in the cabling

cavity

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

power cable experience and specifications,

see RRU Power Cable.

NEG(-)

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Item Silkscreen Remarks

CPRI0 Optical/electrical port 0, connected to the

BBU

CPRI1 Optical/electrical port 1, connected to the

BBU

(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.

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.

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Indicator Color Status Meaning

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.

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.

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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 Options

This section describes RRU installation options. RRU installation supports the centralized mode.

Figure 3-5 shows the diameter of a pole for installing an RRU.

Figure 3-5 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.

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 3-6 shows two RRUs installed in centralized mode.

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Figure 3-6 Two RRUs installed in centralized mode

Figure 3-7 shows three RRUs installed in centralized mode.

Figure 3-7 Three RRUs installed in centralized mode

Figure 3-8 shows four RRUs installed in centralized mode.

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Figure 3-8 Four RRUs installed in centralized mode

NOTE

For details about how to install RRUs on an IFS06, see DBS3900 (ICR) Installation Guide.

3.5 Installation Clearance Requirements of an RRU

This section describes the requirements for the installation clearance of multiple RRUs and the

requirements for the installation spacing between RRUs.

3.5.1 Installation Clearance for Multiple RRUs

This section describes the recommended and minimum installation clearance for multiple RRUs.

Recommended Installation Clearance for Multiple RRUs Installed in Centralized

Mode

Figure 3-9 shows the recommended installation clearance for multiple RRUs installed in

centralized mode.

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Figure 3-9 Recommended installation clearance for multiple RRUs installed in centralized mode

Minimum Installation Clearance for Multiple RRUs Installed in Centralized Mode

Figure 3-10 shows the minimum installation clearance for multiple RRUs installed in centralized

mode.

Figure 3-10 Minimum installation clearance for multiple RRUs installed in centralized mode

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3.5.2 Installation Spacing Between RRUs

This section describes the horizontal and vertical spacing between RRUs.

Figure 3-11 shows the recommended horizontal spacing between RRUs.

Figure 3-11 Recommended horizontal spacing between RRUs

Figure 3-12 shows the recommended vertical spacing between RRUs.

Figure 3-12 Recommended vertical spacing between RRUs

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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.

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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

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5 Installation Process

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

hardware installation, and powering on the RRU.

Figure 5-1 shows the process of installing an RRU.

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Figure 5-1 Process of installing an RRU

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6 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.

6.1 Mounting Kits for an RRU

This section describes the mounting kits for an RRU in centralized mode.

6.2 Installing the RRU on a Pole

This section describes the procedure for installing the RRU on a pole in centralized mode.

6.3 Installing the RRU on a Tower

This section describes the procedure for installing the RRU on a tower in centralized mode.

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6.1 Mounting Kits for an RRU

This section describes the mounting kits for an RRU in centralized mode.

Figure 6-1 shows the mounting kits for an RRU in centralized mode.

Figure 6-1 Mounting kits for an RRU

(1) Bracket assembly (2) Backplane (3) L plate

6.2 Installing the RRU on a Pole

This section describes the procedure for installing the RRU on a pole in centralized mode.

Procedure

Step 1 Install the upper mounting bracket on the pole, use a level to check that the mounting support

is level, and tighten the screws on the mounting bracket to 40 N·m (354.03 lbf·in.) to 45 N·m

(398.28 lbf·in.), as shown in Figure 6-2.

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Figure 6-2 Securing the upper mounting bracket on the pole

Step 2 Install screws on the backplane, and secure the backplane to the RRU by tightening the screws

to 5 N·m (44.25 lbf·in.), as shown in Figure 6-3.

Figure 6-3 Securing the backplane to the RRU

NOTICE

The installing method in Figure 6-4 is incorrect.

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Figure 6-4 Incorrect installing method

Step 3 Install the RRU on the upper mounting bracket, and tighten the screws on the bracket to 40 N·m

(354.03 lbf·in.) to 45 N·m (398.28 lbf·in.), as shown in Figure 6-5.

Figure 6-5 Installing the RRU on the upper mounting bracket

Step 4 Install the lower mounting bracket on the RRU and pole (An L plate is required at the bottom

of the backplane), use a level to check that the mounting support is level, and tighten the screws

on the bracket to 40 N·m (354.03 lbf·in.) to 45 N·m (398.28 lbf·in.), as shown in Figure 6-6.

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Figure 6-6 Securing the lower mounting bracket

Step 5 Install the backplane on the second RRU, similar to step2.

Step 6 Install the second RRU on the upper mounting bracket on the pole, and tighten the screws on

the bracket to 40 N·m (354.03 lbf·in.) to 45 N·m (398.28 lbf·in.),as shown in Figure 6-7.

Figure 6-7 Installing the RRU on the pole

Step 7 Install the backplane and L plate on the lower mounting bracket, and tighten the screws on the

bracket to 40 N·m (354.03 lbf·in.) to 45 N·m (398.28 lbf·in.), as shown in Figure 6-8.

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Figure 6-8 Installing the backplane and L plate on the lower mounting bracket

NOTE

Install the third RRU and the RRU on the other side of the pole the same way as the second RRU. The

tightening torque is similar to that for the first RRU.

----End

6.3 Installing the RRU on a Tower

This section describes the procedure for installing the RRU on a tower in centralized mode.

Procedure

Step 1 Hoist the RRU onto a tower.

1. Install upper and lower mounting brackets on a pole, and then bind the pole using a lifting

sling, as shown in Figure 6-9.

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Figure 6-9 Installing upper and lower mounting brackets and binding the pole

(1) Traction sling (2) Lifting sling

2. Install the backplane on the RRU, and bind the RRU using a lifting sling and traction sling,

as shown in Figure 6-10.

Figure 6-10 Installing the backplane and binding the RRU

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

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NOTICE

lThe handle has a capacity of bearing at least four times the weight of the RRU.

lThe binding methods in Figure 6-11 and Figure 6-12 are incorrect.

Figure 6-11 Incorrect binding method (1)

Figure 6-12 Incorrect binding method (2)

3. Hoist the pole onto the tower, as shown in Figure 6-13.

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Figure 6-13 Hoisting the pole onto the tower

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

4. Hoist the RRU onto the tower, as shown in Figure 6-14.

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Figure 6-14 Hoisting the RRU onto the tower

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

Step 2 Install the RRU on the tower.

1. Align the backplane with the holes on the upper mounting bracket, install screws on the

holes, and secure the backplane to the upper mounting bracket by tightening the screws, as

shown in Figure 6-15.

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Figure 6-15 Installing the RRU on the pole

2. Install the backplane and the L plate on the lower mounting bracket, as shown in Figure

6-16.

Figure 6-16 Installing the backplane and the L plate on the lower mounting bracket

----End

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7 Installing RRU Cables

About This Chapter

This chapter describes the procedure for installing RRU cables.

7.1 Cabling Requirements

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

interference.

7.2 RRU Cable Connections

This section describes RRU cable connections.

7.3 Installing RRU Cables

This chapter describes the procedure for installing RRU cables.

7.4 RRU Cables

This section describes RRU cable connections.

7.5 Installing an RRU PGND Cable

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

7.6 Installing an RRU RF Jumper

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

7.7 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.

7.8 Installing an RRU Alarm Cable

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

7.9 Opening the Cover Plate of an RRU Cabling Cavity

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

7.10 Installing a CPRI Optical Cable

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

7.11 Installing an RRU Power Cable

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

7.12 Closing the Cover Plate of an RRU Cabling Cavity

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

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7.1 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.

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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.

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Figure 7-1 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 7-2 Cables secured on a cable tray

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

The following figure shows the cables secured on a tower.

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Figure 7-3 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.

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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 7-4 E1 cables routed in the cabinet

Cabling of fiber optic cables

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.

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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 7-5 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.

Figure 7-6 CPRI fiber optic cables routed in the cabinet (1)

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

Figure 7-8 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.

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.

7.2 RRU Cable Connections

This section describes RRU cable connections.

NOTE

The RRU does not support power cable cascading.

Figure 7-9 shows the cable connections of a single RRU.

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Figure 7-9 Cable connections of a single 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 7-10 shows the cable connections of multiple RRUs.

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Figure 7-10 Cable connections of multiple RRUs

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

(4) CPRI optical fiber - -

7.3 Installing RRU Cables

This chapter describes the procedure for installing RRU cables.

Figure 7-11 shows the procedure for installing RRU cables.

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Figure 7-11 Procedure for installing RRU cables

7.4 RRU Cables

This section describes RRU cable connections.

Table 7-1 lists RRU cables.

Table 7-1 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

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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 DIN male

connector

RF ports on

the RRU

DIN 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

7.5 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.

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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 at one end of the PGND cable to the ground terminal at the RRU

bottom and the M8 OT terminal at the other end to the external ground bar, as shown in Figure

7-12.

Figure 7-12 Installing an RRU PGND cable

NOTE

Crimp OT terminals in correct positions, as shown in Figure 7-13.

Figure 7-13 Correct position of an OT terminal

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

----End

7.6 Installing an RRU RF Jumper

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

Procedure

Step 1 Connect the DIN male connector at one end of the RRU RF jumper to the ANT port on the RRU,

and use a torque wrench to tighten the connector to 25 N·m (221.27 lbf·in.), as shown in Figure

7-14.

Figure 7-14 Installing an RRU RF jumper

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 7-15.

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Figure 7-15 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

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 7-16.

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NOTICE

Do not remove dustproof caps from vacant antenna connectors.

Figure 7-16 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.

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 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.

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Step 7 Attach color-coding to the installed RF jumper according to the instructions in Attaching the

Color Ring.

----End

7.7 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 7-17.

Figure 7-17 Installing an RRU AISG multi-wire cable

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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 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 7-18.

Figure 7-18 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 7-19.

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Figure 7-19 Installing an RRU AISG extension cable

5. Route the cables according to the instructions in 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

7.8 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 7-20.

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Figure 7-20 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.).

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 7-21.

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 7-22 shows the method for handling cord end terminals not in use.

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Figure 7-21 Removing insulated protective tubes from the cord end terminals

Figure 7-22 Method for handling cord end terminals that are not in use

Step 5 Route the cables according to the instructions in 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

7.9 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.

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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 M5 Phillips screwdriver to loosen the three screws on the cover plate of the RRU cabling

cavity, and open the cover plate, as shown in Figure 7-23.

Figure 7-23 Opening the cover plate of the RRU cabling cavity

(1) Cover plate (2) Cabling cavity (3) Clip

(4) Cable trough for the power cable (5) Waterproof block (6) Cable trough for the fiber optical cable

Step 3 Loosen the screws on the clip using an M4 Phillips screwdriver, and open the clip, as shown in

Figure 7-24.

NOTE

Open the clip only for the associated cable.

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Figure 7-24 Opening clips

Step 4 Remove the waterproof block.

NOTE

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

----End

7.10 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.

NOTICE

The optical modules to be installed must match CPRI rates.

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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 7-25.

Figure 7-25 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 7-26.

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Figure 7-26 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 7.3 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 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

7.11 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 10.1 Adding a Tool-Less Female Connector (Pressfit Type) to the

RRU Power Cable on the RRU Side.

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Installation Guide 7 Installing RRU Cables

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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 7-2 describes the RRU power cable.

Table 7-2 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 7-27.

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Installation Guide 7 Installing RRU Cables

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Figure 7-27 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 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

7.12 Closing the Cover Plate of an RRU Cabling Cavity

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

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Installation Guide 7 Installing RRU Cables

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Procedure

Step 1 Close the clips for the installed cables. Use an M4 torque screwdriver to tighten the screws on

each clip to 1.4 N·m (12.39 lbf·in.), as shown in Figure 7-28.

NOTICE

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

Figure 7-28 Closing clips

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

7-29.

NOTICE

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

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Figure 7-29 Correct placement of waterproof blocks

Step 3 Close the cover plate of the RRU cabling cavity. Use an M5 torque screwdriver to partially

tighten the screws on the cover plate in the sequence shown in Figure 7-30. Then tighten the

screws to 2 N·m (17.7 lbf·in.) in the same sequence.

NOTICE

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

Figure 7-30 Closing the cover plate of an RRU cabling cavity

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Installation Guide 7 Installing RRU Cables

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

----End

RRU3261

Installation Guide 7 Installing RRU Cables

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8 Checking the RRU Hardware Installation

Table 8-1 provides the checklist for the RRU hardware installation.

Table 8-1 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.

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9 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 9-1 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.

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Installation Guide 9 Powering On an RRU

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Figure 9-1 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.

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Installation Guide 9 Powering On an RRU

Issue Draft A (2015-07-24) Huawei Proprietary and Confidential

10 Appendix

About This Chapter

10.1 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.

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Installation Guide 10 Appendix

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10.1 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 10-1 shows the cable diagram on labels.

Figure 10-1 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 10-2.

Figure 10-2 Determining the length of the power cable

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Step 2 Strip the specified length of the sheath off the power cable, as shown in Figure 10-3.

Figure 10-3 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 10-4.

Figure 10-4 Stripping the sheath off each core wire

Figure 10-5 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 10-6.

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Installation Guide 10 Appendix

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Figure 10-6 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 10-7.

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 10-7 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 10-8.

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Installation Guide 10 Appendix

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Figure 10-8 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 10-9.

Figure 10-9 Inserting core wires into the tool-less female connector (pressfit type)

----End

RRU3261

Installation Guide 10 Appendix

Issue Draft A (2015-07-24) Huawei Proprietary and Confidential

Huawei Technologies RRU3261 Remote Radio Unit User Manual Installation Guide

Huawei Technologies Co.,Ltd Remote Radio Unit Installation Guide

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