Huawei Technologies RRU3256-2500 Remote Radio Unit User Manual RRU3252 RRU3256 Hardware Description

Huawei Technologies Co.,Ltd Remote Radio Unit RRU3252 RRU3256 Hardware Description

RRU3256 Hardware Description-EN

DBS3900

V100R005C00

RRU3252/RRU3256 Hardware

Description

Issue Draft A

Date 2012-11-30

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 Draft A (2012-11-30) Huawei Proprietary and Confidential

About This Document

Purpose

This document provides reference for planning and deploying an RRU3252/RRU3256 (referred

to as RRU in this document). It presents the exterior and describes the ports, functions, cable

types, connector specifications, and cable connections of the RRU.

Product Version

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

Product Name Product Version

DBS3900 LTE TDD V100R005C00 and later versions

Intended Audience

This document is intended for:

lBase station installation engineers

lSystem engineers

lSite maintenance engineers

Organization

1 Change History

This chapter describes changes in the RRU3252/RRU3256 Hardware Description.

2 RRU Introduction

This chapter describes the RRU.

3 RRU Cables

This chapter describes RRU cables.

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4 RRU Auxiliary Devices

This chapter describes remote radio unit (RRU) auxiliary devices.

Conventions

Symbol Conventions

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

Symbol Description

Indicates a hazard with a high level of risk, which if not

avoided, will result in death or serious injury.

Indicates a hazard with a medium or low level of risk, which

if not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation, which if not

avoided, could result in equipment damage, data loss,

performance degradation, or unexpected results.

Indicates a tip that may help you solve a problem or save

time.

Provides additional information to emphasize or supplement

important points of the main text.

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.

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Convention Description

Italic Command arguments are in italics.

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

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

vertical bars. One item is selected.

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

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

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

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

items can be selected.

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

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

GUI Conventions

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

Convention Description

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

are in boldface. For example, click OK.

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

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

Keyboard Operations

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

Format Description

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

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

+A means the three keys should be pressed concurrently.

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

the two keys should be pressed in turn.

Mouse Operations

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

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Action Description

Click Select and release the primary mouse button without moving

the pointer.

Double-click Press the primary mouse button twice continuously and

quickly without moving the pointer.

Drag Press and hold the primary mouse button and move the

pointer to a certain position.

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Contents

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

1 Change History..............................................................................................................................1

2 RRU Introduction..........................................................................................................................2

2.1 RRU Exterior......................................................................................................................................................3

2.2 RRU Ports...........................................................................................................................................................4

2.3 RRU Indicators...................................................................................................................................................5

3 RRU Cables.....................................................................................................................................8

3.1 RRU Cable List................................................................................................................................................10

3.2 RRU PGND Cable............................................................................................................................................11

3.3 RRU Power Cable............................................................................................................................................12

3.4 RRU Alarm Cable............................................................................................................................................12

3.5 CPRI Fiber Optic Cable....................................................................................................................................14

3.6 RGPS Jumper...................................................................................................................................................17

3.7 SFP High-Speed Cable for Cascaded RRUs....................................................................................................18

3.8 RRU RF Jumper...............................................................................................................................................18

3.9 RRU AISG Multi-Wire Cable..........................................................................................................................19

3.10 RRU AISG Extension Cable..........................................................................................................................20

4 RRU Auxiliary Devices..............................................................................................................22

4.1 IFS06................................................................................................................................................................23

4.2 OCB..................................................................................................................................................................24

DBS3900

RRU3252/RRU3256 Hardware Description Contents

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1 Change History

This chapter describes changes in the RRU3252/RRU3256 Hardware Description.

Draft A (2012-11-30)

This is a draft.

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2 RRU Introduction

About This Chapter

This chapter describes the RRU.

The RRU performs the following functions:

lExchanges baseband data with a BBU.

lReceives RF signals from the antenna system, converts the received signals into IF signals,

amplifies the IF signals, and performs analog-to-digital conversion. The TX channel filters

downlink signals, performs digital-to-analog conversion, and converts IF signals into

signals applicable to the TX band.

lMultiplexes RX and TX signals on the RF channel, which enables these signals to share

the same antenna path. It also filters RX and TX signals.

2.1 RRU Exterior

This section describes the exterior and dimensions of an RRU.

2.2 RRU Ports

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

panel, and indicator panel.

2.3 RRU Indicators

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

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2.1 RRU Exterior

This section describes the exterior and dimensions of an RRU.

Figure 2-1 shows an RRU.

Figure 2-1 RRU exterior

Figure 2-2 shows RRU dimensions.

Figure 2-2 RRU dimensions

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2.2 RRU Ports

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

panel, and indicator panel.

Figure 2-3 shows the ports on the RRU panels.

Figure 2-3 Ports on the RRU panels

Table 2-1 describes ports and indicators on the RRU panels.

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Table 2-1 Ports and indicators on the RRU panels

Item Label Description

(1) Ports at the bottom ANT0-ANT3 TX/RX ports. ANT0 port supports RET signal

transmission.

RET/EXT_ALM Communication port for the RET antenna or

port for alarm reporting, supporting RET

signal transmission

RGPS RGPS port, which is optional.

(2) Ports in the cabling

cavity

CPRI0/IR0 Optical port

CPRI1/IR1

RTN(+) Power supply socket

NEG(-)

(3) Indicators RUN For details, see 2.3 RRU Indicators.

ALM

ACT

VSWR

CPRI0/IR0

CPRI1/IR1

NOTE

If only two RF ports are required, ANT0 and ANT1 are used by default.

The RET ports to be used are determined by the software configuration.

2.3 RRU Indicators

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

For the specific positions of RRU indicators, see 2.2 RRU Ports.

Table 2-2 describes RRU indicators.

Table 2-2 Indicators on the RRU

Label Color Status Description

RUN Green Steady on There is power supply, but the module

is faulty.

Steady off There is no power supply, or the

module is faulty.

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Label Color Status Description

Blinking on for 1s and off

for 1s

The module is working properly.

Blinking on for 0.125s and

off for 0.125s

Software is being loaded to the

module, or the module is not started.

ALM Red Steady on Alarms are generated, and the module

must be replaced.

Steady off No alarm is generated.

Blinking on for 1s and off

for 1s

Alarms are generated. The alarms

may be caused by the faults on the

related modules or ports. Therefore,

the necessity for module replacement

is uncertain.

ACT Green Steady on The module is working properly with

TX channels enabled or software is

being loaded without RRU running.

Blinking on for 1s and off

for 1s

The module is working properly with

TX channels disabled.

VSWR Red Steady off No VSWR alarm is generated.

Steady on A VSWR alarm is generated.

CPRI0/

IR0

Red or

green

Steady green The CPRI link is functioning

properly.

Steady red An optical module fails to transmit or

receive signals possibly because the

optical module is faulty or the optical

fiber cable is broken.

Blinking red on for 1s and

off for 1s

The CPRI link is out of lock possibly

because of mutual lock of dual-mode

clock sources or mismatched data

rates over CPRI ports. (You are

advised to check the system

configuration to rectify the fault.)

Steady off The SFP module is not properly

installed, or the optical module is

powered off.

CPRI1/

IR1

Red or

green

Steady green The CPRI link is functioning

properly.

Steady red An optical module fails to transmit or

receive signals possibly because the

optical module is faulty or the optical

fiber cable is broken.

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Label Color Status Description

Blinking red on for 1s and

off for 1s

The CPRI link is out of lock possibly

because of mutual lock of dual-mode

clock sources or mismatched data

rates over CPRI ports. (You are

advised to check the system

configuration to rectify the fault.)

Steady off The SFP module is not properly

installed, or the optical module is

powered off.

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3 RRU Cables

About This Chapter

This chapter describes RRU cables.

3.1 RRU Cable List

This section describes RRU cable connections.

3.2 RRU PGND Cable

An RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of the

RRU.

3.3 RRU Power Cable

An RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power into an RRU.

3.4 RRU Alarm Cable

An RRU alarm cable, a shielded straight-through cable, transmits alarm signals from an external

device to RRUs so that the base station can monitor the operating status of external devices.

3.5 CPRI Fiber Optic Cable

CPRI fiber optic cables are classified into multi-mode fiber optic cables and single-mode fiber

optic cables. They transmit CPRI signals.

3.6 RGPS Jumper

A PGPS jumper connects a RGPS antenna to an RRU.

3.7 SFP High-Speed Cable for Cascaded RRUs

This section describes the SFP high-speed cable for cascaded RRUs. An SFP high-speed cable

for cascaded RRUs connects common public radio interface (CPRI) ports between two RRUs

and transmits CPRI signals between RRUs. SFP is short for small form-factor pluggable while

RRU is short for remote radio unit.

3.8 RRU RF Jumper

A 1/2" RRU RF jumper transmits and receives RF signals.

3.9 RRU AISG Multi-Wire Cable

This section describes a remote radio unit (RRU) AISG multi-wire cable with the length of 5 m.

It connects an RRU and a remote control unit (RCU) to transmit control signals from an eNodeB

to the remote electrical tilt (RET) antenna. When the RRU is connected to the RET antenna, an

AISG multi-wire cable transmits RS485 signals.

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3.10 RRU AISG Extension Cable

This section describes the remote radio unit (RRU) AISG extension cable. When the distance

between an RRU and a remote control unit (RCU) is longer than 5 m, 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 for transmitting RS485 signals.

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3.1 RRU Cable List

This section describes RRU cable connections.

Table 3-1 lists RRU cables.

Table 3-1 RRU cables

Cable One End The Other End

Connector Connected

to...

Connector Connected to...

3.2 RRU

PGND Cable

OT terminal

(M6)

Ground

terminal on the

RRU

OT terminal

(M8)

Ground terminal

on the ground bar

3.3 RRU Power

Cable

Tool-less

female

connector

(pressfit type)

NEG(-) and

RTN(+) ports

on the RRU

Tool-less female

connector

(pressfit type)

One of RRU0 to

RRU5 ports on

the EPS

OT terminal

(M4)

One of LOAD0

to LOAD5 ports

on the DCDU

One of LOAD4

to LOAD9 ports

on the PDU

3.5 CPRI Fiber

Optic Cable

DLC connector CPRI0/IR0 port

on the RRU

DLC connector CPRI port on the

LBBP in the

BBU

CPRI1/IR1 port

on the RRU

CPRI0/IR0 port

on the RRU

3.8 RRU RF

Jumper

Type N

connector

ANT0 to ANT3

ports on the

RRU

Type N

connector

Antenna system

3.6 RGPS

Jumper

(optional)

Waterproofed

DB15

connector

Remote Global

Positioning

System (RGPS)

port at the RRU

bottom

Round 12-pin

connector

RGPS antenna

3.7 SFP High-

Speed Cable

for Cascaded

RRUs

(optional)

SFP20 male

connector

CPRI1 port on

the RRU

SFP20 male

connector

CPRI0 port on

the RRU

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Cable One End The Other End

Connector Connected

to...

Connector Connected to...

3.4 RRU

Alarm Cable

(optional)

Waterproofed

DB9 male

connector

RET/

EXT_ALM

port on the

RRU

Cord end

terminal

External alarm

device

3.9 RRU AISG

Multi-Wire

Cable

(optional)

Waterproofed

DB9 male

connector

RET/

EXT_ALM

port on the

RRU

Standard AISG

female connector

Standard AISG

male connector

on the remote

control unit

(RCU) or on the

AISG extension

cable

3.10 RRU

AISG

Extension

Cable

(optional)

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

3.2 RRU PGND Cable

An RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of the

RRU.

Exterior

An RRU PGND cable is green or green and yellow, both ends of the cable are OT terminals. If

the customer prepares the PGND cable, a copper-core cable with a minimum cross-sectional

area of 16 mm2 (0.025 in.2) is recommended. Figure 3-1 shows a PGND cable.

Figure 3-1 PGND cable

(1) OT terminal (M6) (2) OT terminal (M8)

OT terminals must be added to both ends of a PGND cable onsite.

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3.3 RRU Power Cable

An RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power into an RRU.

Exterior

An RRU power cable has an easy power receptacle (pressfit type) connector at one end and bare

wires at the other end. Proper terminals are added to the bare wires based on the connector on

the external power device, as shown in Figure 3-2.

The cross-sectional area of an RRU power cable can be either 3.3 mm2 (0.005 in.2)/5.3 mm2

(0.008 in.2) or 4 mm2 (0.006 in.2)/6 mm2 (0.009 in.2). The former complies with North American

standards and the latter complies with European standards.

Figure 3-2 RRU power cable

Pin Assignment

The DC power input cable is a two-wire cable. Table 3-2 and Table 3-3 describe the pin

assignment for the wires of a DC power input cable.

Table 3-2 Pin assignment for the wires of a DC power input cable (North American standards)

Wire Color

NEG(-) Blue

RTN(+) Black

Table 3-3 Pin assignment for the wires of a DC power input cable (European standards)

Wire Color

NEG(-) Blue

RTN(+) Brown

3.4 RRU Alarm Cable

An RRU alarm cable, a shielded straight-through cable, transmits alarm signals from an external

device to RRUs so that the base station can monitor the operating status of external devices.

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Exterior

An alarm cable has a DB9 connector at one end and eight cord end terminals at the other end,

as shown in Figure 3-3.

Figure 3-3 RRU alarm cable

(1) DB9 waterproof connector (2) Cord end terminal

Pin Assignment

Table 3-4 describes the pin assignment for the wires of an RRU alarm cable.

Table 3-4 Pin assignment for the wires of an RRU alarm cable

RRU

Alarm

Port

Pin of the

DB9

Connecto

Wire

Color

Wire

Type

Cord End

Terminal

Description

Dry

contact

X1.2 White or

blue

Twisted

pair cable

X2 Boolean signal input 0+

X1.4 Blue X3 Boolean signal input 0-

(GND)

X1.7 White or

orange

Twisted

pair cable

X4 Boolean signal input 1+

X1.4 Orange X5 Boolean signal input 1-

(GND)

RS485 X1.6 White or

green

Twisted

pair cable

X6 APM RX-

X1.8 Green X7 APM RX+

X1.5 White or

brown

Twisted

pair cable

X8 APM TX-

X1.3 Brown X9 APM TX+

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3.5 CPRI Fiber Optic Cable

CPRI fiber optic cables are classified into multi-mode fiber optic cables and single-mode fiber

optic cables. They transmit CPRI signals.

NOTE

lAn ODF can be used when the distance between a BBU and an RRU or the distance between

interconnected RRUs is longer than 100 m (328.08 ft).

lA single-mode fiber optic cable connects a BBU to an ODF or connects an ODF to an RRU.

The maximum length of a CPRI fiber optic cable is 150 m (492.12 ft) When the fiber optical

cable connects a BBU and an RRU. The length of a CPRI fiber optic cable is 10 m (32.81 ft)

when the fiber optical cable connects two RRUs.

Exterior

Figure 3-4 shows a fiber optic cable between a BBU and an RRU or between RRUs, with a

DLC connector at each end.

Figure 3-4 Fiber optical cable between a BBU and an RRU or between RRUs

(1) DLC connector (2) Branch optical fiber (3) Label on the branch optical fiber

When a fiber optical cable connects a BBU and an RRU, the optical fibers on the BBU side and

RRU side are 0.34 m (0.013 in.) and 0.03 m (0.0012 in.) long, respectively. When a fiber optical

cable connects two RRUs, the optical fibers on both RRU sides are 0.03 m (0.0012 in.) long.

Figure 3-5 shows the connections for a CPRI fiber optic cable between a BBU and an RRU.

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Figure 3-5 Connections for a CPRI fiber optic cable between a BBU and an RRU

(1) CPRI fiber optic cable between a BBU and an RRU

Figure 3-6 shows a single-mode fiber optic cable between a BBU and an ODF or between an

ODF and an RRU, with a DLC connector at one end and an FC connector at the other end.

Figure 3-6 Single-mode fiber optic cable between a BBU and an ODF or between an ODF and

an RRU

(1) DLC connector (2) Branch optical fiber

(3) Label on the branch optical fiber (4) FC connector

When a single-mode fiber optic cable connects a BBU and an ODF, the optical fibers on the

BBU side and ODF side are 0.34 m (0.013 in.) and 0.8 m (0.031 in.) long, respectively.

When a single-mode fiber optic cable connects an ODF and an RRU, the optical fibers on the

RRU side and ODF side are 0.03 m (0.013 in.) and 0.8 m (0.031 in.) long, respectively.

Figure 3-7 shows the connections for a single-mode CPRI fiber optic cable between a BBU and

an ODF or between an ODF and an RRU.

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Figure 3-7 Connections for a single-mode fiber optic cable between a BBU and an ODF or

between an ODF and an RRU

(1) Single-mode CPRI fiber optic cable between a BBU

and an ODF

(2) Single-mode CPRI fiber optic cable between an

ODF and an RRU

NOTE

A CPRI fiber optic cable must be connected to optical modules in the CPRI ports. A multi-mode fiber optic

cable and single-mode fiber optic cable are connected to multi-mode optical modules and single-mode optical

modules, respectively.

Pin Assignment

Table 3-5, Table 3-6, and Table 3-7 describe the labels on and recommended connections for

fiber optic cables of an optical assembly.

Table 3-5 Labels on and recommended connections for optical fibers of an optical assembly

between a BBU and an RRU

Label Connected To

1A CPRI RX port on the RRU

1B CPRI TX port on the RRU

2A TX port on the BBU

2B RX port on the BBU

Table 3-6 Labels on and recommended connections for optical fibers of a fiber optic cable

between RRUs

Label Connected To

1A CPRI RX port on RRU 1

1B CPRI TX port on RRU 1

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Label Connected To

2A CPRI TX port on RRU 0

2B CPRI RX port on RRU 0

Table 3-7 Labels on and recommended connections for optical fibers of a single-mode optical

assembly between a BBU and an ODF or between an ODF and an RRU

Label Connected To

1A RX port on the BBU or CPRI RX port on the RRU

1B TX port on the BBU or CPRI TX port on the RRU

2A ODF

2B ODF

3.6 RGPS Jumper

A PGPS jumper connects a RGPS antenna to an RRU.

Exterior

A RGPS jumper has a DB15 waterproof connector at one end and a round 12–pin connector at

the other end, as shown in Figure 3-8.

Figure 3-8 RGPS jumper

(1) DB15 waterproof connector (2) Round 12-pin connector

Pin Assignment

Table 3-8 describes the pin assignment for the wires of the RGPS jumper.

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Table 3-8 Pin assignment for the wires of the RGPS jumper

X1 (Pin for the

DB15 Waterproof

Connector)

X2 (Pin for the

Round 12-pin

Connector)

Color Type Description

X1.1 X2.9 White and

blue Twisted

pair

GND

X1.6 X2.1 Blue +28 V

X1.14 X2.5 White and

orange Twisted

pair

RXD_422+

X1.13 X2.4 Orange RXD_422-

X1.12 X2.3 White and

green

Twisted

pair

TXD_422+

X1.11 X2.2 Green TXD_422-

X1.2 X2.11 White and

brown

Twisted

pair

1PPS_422+

X1.7 X2.12 Brown 1PPS_422-

3.7 SFP High-Speed Cable for Cascaded RRUs

This section describes the SFP high-speed cable for cascaded RRUs. An SFP high-speed cable

for cascaded RRUs connects common public radio interface (CPRI) ports between two RRUs

and transmits CPRI signals between RRUs. SFP is short for small form-factor pluggable while

RRU is short for remote radio unit.

Exterior

Figure 3-9 shows an SFP high-speed cable for cascaded RRUs.

Figure 3-9 SFP high-speed cable for cascaded RRUs

3.8 RRU RF Jumper

A 1/2" RRU RF jumper transmits and receives RF signals.

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Exterior

An RF jumper has a Type N male connector at both ends, as shown in Figure 3-10.

Figure 3-10 RF jumper

(1) Type N male connector

3.9 RRU AISG Multi-Wire Cable

This section describes a remote radio unit (RRU) AISG multi-wire cable with the length of 5 m.

It connects an RRU and a remote control unit (RCU) to transmit control signals from an eNodeB

to the remote electrical tilt (RET) antenna. When the RRU is connected to the RET antenna, an

AISG multi-wire cable transmits RS485 signals.

NOTE

An RCU is a driving motor used for the phase shifter in the RET antenna. It receives control commands from

an eNodeB and runs the commands to drive the stepper motor. Using a gear, the stepper motor drives the

adjustable phase shifter in the antenna and changes the downtilt angle.

Exterior

An AISG multi-wire cable has a waterproofed DB9 male connector at one end and a standard

AISG female connector at the other end, as shown in Figure 3-11.

Figure 3-11 AISG multi-wire cable

1. DB9 waterproof male connector 2. Standard AISG female connector

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Pin Assignment

Table 3-9 describes the pin assignment for the core wires of an AISG multi-wire cable.

Table 3-9 Pin assignment for the core wires of an AISG multi-wire cable

X1 End (Pin of the

Waterproofed

DB9 Male

Connector)

X2 End (Pin of the

Standard AISG

Female Connector)

Color of

the Core

Wire

Type of

the Core

Wire

Description

X1.1 X2.1

White and

blue Twisted

pair +12 V

Blue

X1.3 X2.3 White and

orange Twisted

pair

RS485 B

X1.5 X2.5 Orange RS485 A

X1.4 X2.4 White and

green

- GND

X1.9 is connected to

X1.4.

- - - GND

- X2.1 is connected to

X2.6.

- - +12 V

- X2.4 is connected to

X2.7.

- - GND

3.10 RRU AISG Extension Cable

This section describes the remote radio unit (RRU) AISG extension cable. When the distance

between an RRU and a remote control unit (RCU) is longer than 5 m, 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 for transmitting RS485 signals.

Exterior

An AISG extension cable has a standard AISG male connector at one end and a standard AISG

female connector at the other end, as shown in Figure 3-12.

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RRU3252/RRU3256 Hardware Description 3 RRU Cables

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Figure 3-12 AISG extension cable

1. Standard AISG male connector 2. Standard AISG female connector

Pin Assignment

Table 3-10 describes the pin assignment for the core wires of an AISG extension cable.

Table 3-10 Pin assignment for the core wires of an AISG extension cable

X1 End (Pin

of the

Standard

AISG Male

Connector)

X2 End (Pin

of the

Standard

AISG

Female

Connector)

Color of the

Core Wire

Type of the

Core Wire

Description

X1.1 X2.1 White and blue Twisted pair +12 V

Blue

X1.7 X2.7 White and orange Twisted pair DC Return A

Orange

X1.3 X2.3 White and green Twisted pair RS485 B

X1.5 X2.5 Green RS485 A

X1.6 X2.6 White and brown Twisted pair +24 V

Brown

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4 RRU Auxiliary Devices

About This Chapter

This chapter describes remote radio unit (RRU) auxiliary devices.

4.1 IFS06

An Indoor Floor installation Support (IFS06) is used for installing indoor RRUs.

4.2 OCB

An Outdoor Cable Conversion Box (OCB) interconnects cables of different core diameters.

Power cables shipped with RRUs cannot support long-distance power supply. Therefore, when

power supply is far from the equipment, cables with large core diameters are used, and an OCB

connects these cables and RRU power cables.

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4.1 IFS06

An Indoor Floor installation Support (IFS06) is used for installing indoor RRUs.

Exterior

Figure 4-1 shows an IFS06.

Figure 4-1 IFS06

Function

lIt can be installed on the ground.

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

heights of RRUs.

Structure

The IFS06 consists of the main frame, cable tray, upper and lower adjustable beams, and front

and rear feet, as shown in Figure 4-2.

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Figure 4-2 IFS06 structure

(1) Upper adjustable beam (2) Main frame (3) Lower adjustable beam

(4) Front foot (5) Rear foot (6) Cable tray

Specifications

Table 4-1 describes IFS06 specifications.

Table 4-1 IFS06 specifications

Item Specification

Dimensions 1730 mm (79 in.) x 600 mm (23.62 in.) x 600 mm (23.62 in.)

(H x W x D)

Weight 45 kg (99.23 lb)

4.2 OCB

An Outdoor Cable Conversion Box (OCB) interconnects cables of different core diameters.

Power cables shipped with RRUs cannot support long-distance power supply. Therefore, when

power supply is far from the equipment, cables with large core diameters are used, and an OCB

connects these cables and RRU power cables.

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Application Scenario of an OCB

Figure 4-3 shows the application scenario of an OCB.

Figure 4-3 Application scenario of an OCB

For details about the structure, functions, installation, and maintenance of an OCB, see the OCB

User Guide.

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Huawei Technologies RRU3256-2500 Remote Radio Unit User Manual RRU3252 RRU3256 Hardware Description

Huawei Technologies Co.,Ltd Remote Radio Unit RRU3252 RRU3256 Hardware Description

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