Huawei PRRU3901B2B5 User Manual

DBS3900 LampSite

Installation Guide

Issue 06

Date 2015-10-30

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

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DBS3900 LampSite Installation Guide

Overview

About This Document

This document describes how to install the modules and cables for the BBU, DCU, RHUB, pRRU3901, pRRU3902, and pRRU3907 indoors. It also provides checklists for hardware installation.

NOTE

l Unless otherwise specified, BBU in this document refers to BBU3900 and BBU3910.

l DCU3900 in this document refers to DCU.

l RHUB3908 in this document refers to RHUB.

l Unless otherwise specified, pRRU in this document refers to pRRU3901, pRRU3902, and pRRU3907.

Product Version

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

Product Name

DBS3900 LampSite

Intended Audience

This document is intended for:

l BTS installation personnel

Solution Version Product Version

l SRAN10.1 and later versions

l RAN17.1 and later versions

l eRAN8.1 and later versions

l eRAN TDD 8.1 and later

versions

V100R010C10 and later versions

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DBS3900 LampSite Installation Guide Contents

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

1 Changes in DBS3900 LampSite Installation Guide................................................................1

2 Installation Preparations..............................................................................................................4

2.1 Reference Documents.....................................................................................................................................................5

2.2 Preparing Tools and Instruments.................................................................................................................................... 5

2.3 Requirements for Installation Personnel.........................................................................................................................6

3 Unpacking and Checking............................................................................................................ 7

4 Installing a BBU.............................................................................................................................9

5 Installing a DCU.......................................................................................................................... 10

6 Installing an RHUB.....................................................................................................................11

6.1 Information About the Installation............................................................................................................................... 12

6.1.1 Installation Scenarios.................................................................................................................................................12

6.1.2 Installation Clearance Requirements......................................................................................................................... 17

6.1.3 Installation Environment........................................................................................................................................... 19

6.2 Installation Process....................................................................................................................................................... 21

6.3 Installing an RHUB...................................................................................................................................................... 22

6.3.1 Installing an RHUB in a 19-Inch Cabinet or Rack....................................................................................................22

6.3.2 Installing an RHUB in a 19-Inch Shelf..................................................................................................................... 25

6.3.3 Installing an RHUB on a Wall................................................................................................................................... 28

6.4 Installing RHUB Cables............................................................................................................................................... 32

6.4.1 Requirements for Cable Layout.................................................................................................................................32

6.4.2 Cable List...................................................................................................................................................................35

6.4.3 Cable Connections.....................................................................................................................................................36

6.4.4 Cable Installation Process..........................................................................................................................................37

6.4.5 Installing PGND Cable..............................................................................................................................................38

6.4.6 Installing Ethernet Cable........................................................................................................................................... 39

6.4.7 Installing CRPI Optical Cables..................................................................................................................................41

6.4.8 Installing Alarm Cable (Optional).............................................................................................................................44

6.4.9 Installing Power Cable...............................................................................................................................................45

6.5 Checking the RHUB Hardware Installation................................................................................................................. 46

6.6 Power-on Check on an RHUB......................................................................................................................................48

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iii

DBS3900 LampSite Installation Guide Contents

7 Installing a pRRU3901................................................................................................................ 50

7.1 Information About the Installation............................................................................................................................... 51

7.1.1 Product Family.......................................................................................................................................................... 51

7.1.2 Installation Scenario.................................................................................................................................................. 51

7.1.3 Space Requirements.................................................................................................................................................. 55

7.1.4 Installation Environment Requirements.................................................................................................................... 56

7.2 Obtaining the MAC Address (Optional) ..................................................................................................................... 57

7.3 Installation Process....................................................................................................................................................... 57

7.4 Installing a pRRU3901................................................................................................................................................. 58

7.4.1 pRRU3901 Mounting Kits.........................................................................................................................................59

7.4.2 Installing a pRRU3901 on a Wall.............................................................................................................................. 60

7.4.3 Installing a pRRU3901 on a Ceiling..........................................................................................................................63

7.4.4 Installing a pRRU3901 on a Pole.............................................................................................................................. 66

7.4.5 Installing a pRRU3901 on a Plate............................................................................................................................. 68

7.4.6 Installing a pRRU3901 on a Keel..............................................................................................................................71

7.5 Installing pRRU3901 Cables........................................................................................................................................ 74

7.5.1 Requirements for Cable Layout.................................................................................................................................74

7.5.2 pRRU3901 Cable List............................................................................................................................................... 76

7.5.3 Cable Connections.....................................................................................................................................................76

7.5.4 Cable Connections (LTE TDD)................................................................................................................................. 79

7.5.5 pRRU3901 cable installation process........................................................................................................................81

7.5.6 Installing an Ethernet Cable...................................................................................................................................... 81

7.5.7 Installing an RF jumpers (Optional)..........................................................................................................................83

7.6 Checking the pRRU3901 Hardware Installation.......................................................................................................... 85

7.7 Powering on the pRRU3901.........................................................................................................................................86

8 Installing a pRRU3902................................................................................................................ 88

8.1 Information About the Installation............................................................................................................................... 89

8.1.1 pRRU3902 Product Family....................................................................................................................................... 89

8.1.2 pRRU3902 Installation Scenario............................................................................................................................... 90

8.1.3 Space Requirements.................................................................................................................................................. 93

8.1.4 Installation Environment Requirements.................................................................................................................... 94

8.2 Installation Process....................................................................................................................................................... 95

8.3 Installing a pRRU3902................................................................................................................................................. 96

8.3.1 pRRU3902 Mounting Kits.........................................................................................................................................96

8.3.2 Installing a pRRU3902 on a Wall.............................................................................................................................. 98

8.3.3 Installing a pRRU3902 on a Ceiling........................................................................................................................102

8.3.4 Installing a pRRU3902 on a Plate........................................................................................................................... 105

8.3.5 Installing a pRRU3902 on a Keel............................................................................................................................ 112

8.3.6 Installing a pRRU3902 on Steel Hangers................................................................................................................ 116

8.4 Installing pRRU3902 Cables...................................................................................................................................... 120

8.4.1 Requirements for Cable Layout...............................................................................................................................120

8.4.2 pRRU3902 Cable List............................................................................................................................................. 122

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8.4.3 Cable Connections...................................................................................................................................................122

8.4.4 pRRU3902 cable installation process......................................................................................................................124

8.4.5 Installing an Ethernet Cable.................................................................................................................................... 125

8.4.6 Installing an RF Jumpers (Optional)....................................................................................................................... 126

8.5 (Optional) Installing a Combiner................................................................................................................................128

8.6 Checking the pRRU3902 Hardware Installation........................................................................................................ 130

8.7 Powering on the pRRU3902.......................................................................................................................................131

9 Installing a pRRU3907.............................................................................................................. 133

9.1 Information About the Installation............................................................................................................................. 134

9.1.1 pRRU3907 Product Family..................................................................................................................................... 134

9.1.2 Constraints and Limitations.....................................................................................................................................134

9.1.3 Installation Clearance and Space Requirements......................................................................................................137

9.1.4 Installation Environment Requirements.................................................................................................................. 139

9.2 Installation Process..................................................................................................................................................... 140

9.3 Installing a pRRU3907............................................................................................................................................... 141

9.3.1 pRRU3907 Mounting Kits.......................................................................................................................................141

9.3.2 Installing a pRRU on a Wall.................................................................................................................................... 142

9.3.3 Installing a pRRU on a Pole.................................................................................................................................... 146

9.4 Installing pRRU Cables.............................................................................................................................................. 148

9.4.1 Cabling Requirements............................................................................................................................................. 148

9.4.2 pRRU3907 Cable List............................................................................................................................................. 150

9.4.3 pRRU Cable Connections........................................................................................................................................151

9.4.4 pRRU3907 cable installation process......................................................................................................................151

9.4.5 Installing a PGND Cable......................................................................................................................................... 152

9.4.6 Installing an RF Jumper...........................................................................................................................................153

9.4.7 Opening the Cover Plate of a pRRU Cabling Cavity.............................................................................................. 157

9.4.8 Installing an Ethernet Cable.................................................................................................................................... 158

9.4.9 Closing the Cover Plate of a pRRU Cabling Cavity............................................................................................... 160

9.5 Checking the pRRU3907 Hardware Installation........................................................................................................ 161

9.6 Powering on the pRRU3907.......................................................................................................................................163

10 Installing the Extender (Optional)....................................................................................... 165

11 Appendix...................................................................................................................................168

11.1 MAC Collection Template........................................................................................................................................169

11.2 DBS3900 LampSite Engineering Label................................................................................................................... 169

11.3 Attaching an L-Shaped Label................................................................................................................................... 172

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DBS3900 LampSite Installation Guide

1 Changes in DBS3900 LampSite Installation Guide

1 Changes in DBS3900 LampSite Installation

Guide

This chapter describes the changes in the DBS3900 LampSite Installation Guide.

06 (2015-10-30)

05 (2015-08-30)

This is the sixth commercial release.

Compared with 05 (2015-08-30), this issue includes the following new topics:

l 9 Installing a pRRU3907

Compared with 05 (2015-08-30), no information is changed.

Compared with 05 (2015-08-30), no information is deleted.

This is the fifth commercial release.

Compared with 04 (2015-07-30), no information is added.

Compared with 04 (2015-07-30), this issue incorporates the following changes

Content

6.4.7 Installing CRPI Optical Cables Added the descriptions about the CPRI

Change Description

optical fiber connection in sharing BBUs with Macro Networks scenario.

Compared with 04 (2015-07-30), no information is deleted.

04 (2015-07-30)

This is the fourth commercial release.

Compared with 03 (2015-06-30), no information is added.

Compared with 03 (2015-06-30), this issue incorporates the following changes.

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03 (2015-06-30)

1 Changes in DBS3900 LampSite Installation Guide

Content Change Description

Entire document Added the RHUB that has no electrical

transmission port.

Compared with 03 (2015-06-30), no information is deleted.

This is the third commercial release.

Compared with 02 (2015-05-08), this issue includes the following new topics:

l 5 Installing a DCU

Compared with 02 (2015-05-08), this issue incorporates the following changes:

02 (2015-05-08)

Content

Entire document Added the descriptions about the DCU.

Compared with 02 (2015-05-08), no information is deleted.

This is the second commercial release.

Compared with 01 (2015-03-23), no information is added.

Compared with 01 (2015-03-23), this issue incorporates the following changes:

Content

6.4.9 Installing Power Cable Modified the RHUB configurations of

8.1.2 pRRU3902 Installation Scenario Deleted the minimum space requirements of

8.1.3 Space Requirements Deleted the minimum space requirements of

Change Description

upper-level circuit breakers.

the pRRU3901.

the pRRU3902.

8.3.2 Installing a pRRU3902 on a Wall Added the step about locking the protection

screw of pRRU3902.

8.3.3 Installing a pRRU3902 on a Ceiling

8.3.4 Installing a pRRU3902 on a Plate

8.3.5 Installing a pRRU3902 on a Keel

Compared with 01 (2015-03-23), no information is deleted.

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01 (2015-03-23)

1 Changes in DBS3900 LampSite Installation Guide

This is the first commercial release.

Compared with draft B (2015-02-10), this issue includes the following new topics:

l 8 Installing a pRRU3902

Compared with draft B (2015-02-10), this issue incorporates the following changes:

Content

Entire document Added the descriptions about the

Compared with draft B (2015-02-10), no information is deleted.

Draft B (2015-02-10)

This is a draft release.

Compared with draft A (2015-01-15), no information is added.

Compared with draft A (2015-01-15), this issue incorporates the following change:

Content

6.1.1 Installation Scenarios Added the descriptions about the RHUB

Change Description

pRRU3902.

Change Description

panel must not face upwards.

Compared with draft A (2015-01-15), no information is deleted.

Draft A (2015-01-15)

This is a draft release.

Compared with Issue 08 (2014-12-30) of V100R009C00, no information is added.

Compared with Issue 08 (2014-12-30) of V100R009C00, this issue incorporates the following change:

Content

Entire document The base station in the LampSite solution is

Compared with Issue 08 (2014-12-30) of V100R009C00, no information is deleted.

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Change Description

renamed DBS3900 LampSite.

DBS3900 LampSite Installation Guide

About This Chapter

Before starting the installation, you must obtain the required reference documents, tools, and instruments, and familiarize yourself with the skills required.

2 Installation Preparations

2.1 Reference Documents

Before the installation, you must read the following documents:

2.2 Preparing Tools and Instruments

This section describes the tools and instruments that must be prepared before the installation.

2.3 Requirements for Installation Personnel

This section describes requirements for installation engineers. They must be qualified and trained, and familiar with correct operation methods and safety precautions before performing any operations.

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2.1 Reference Documents

Before the installation, you must read the following documents:

l DBS3900 LampSite Hardware Description

l Installation Reference

2.2 Preparing Tools and Instruments

This section describes the tools and instruments that must be prepared before the installation.

2 Installation Preparations

Marker

Level

Power cable crimping tool RJ11 crimping tool Cable cutter

Rubber mallet Crown saw (Ø60) Wire stripper

Hammer drill (Ø6, Ø8 and Ø12)

Torque screwdriver

(M4 to M6)

Torque wrench (Ø10 mm) Protective gloves

Diagonal pliers

Guarded blade utility knife ESD gloves Long measuring tape

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2 Installation Preparations

Multimeter Network cable tester Vacuum cleaner

Ladder Torque wrench for SMA

connector

Hole screwdriver (T20) – -

2.3 Requirements for Installation Personnel

Socket wrench (M6)

Before the installation, pay attention to the following items:

l Technical engineers must take Huawei training and be familiar with proper installation

and operation methods.

l The number of installation personnel depends on the engineering schedule and

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

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Context

3 Unpacking and Checking

This section describes how to unpack and check the delivered equipment to ensure that the materials are complete and intact.

Procedure

Step 1 Count the total number of the shipments.

NOTE

The following lists important notes when you are transporting, lifting, or installing the equipment or components:

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

l Wear clean gloves and do not touch them with bare hands, sweat-soaked gloves, or dirty gloves.

NOTICE

You must power on the RHUB or pRRU within 7 days after it is unpacked.

If...

The total number of the components is consistent with that recorded in the packing lists on all packing boxes

Then...

Go to Step 2.

The total number of the components is inconsistent with that recorded in the packing lists on all packing boxes

Step 2 Check the exterior of each packing box.

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Report the problems and causes to the local Huawei office.

DBS3900 LampSite Installation Guide

Step 3 Check the type and quantity of the equipment in the boxes according to the packing list.

3 Unpacking and Checking

If... Then...

The exterior of each packing box is intact Go to Step 3.

It is damaged or soaked Report the problems and causes to the local

Huawei office.

The collision label is red Do not unpack the packing box and claim for

compensation from the transportation company.

If...

The type and number are consistent with the packing list on each packing list

There is any shortage, wrong delivery, or damaged equipment

Then...

Sign the Packing List with the operator.

Report the problems and causes to the local Huawei office.

NOTICE

Perform the following operations to protect the components from any damages and help find out the cause of any damage in future: 1. Store the unpacked equipment and packing materials indoors. 2. Take photos of the storeroom, rusted or eroded equipment, packing box, and packing materials. 3. File the photos.

----End

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4 Installing a BBU

This chapter describes the process of installing a BBU.

For details about the installation of the BBU, see DBS3900 Installation Guide.

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5 Installing a DCU

This chapter describes the process of installing a DCU.

For details about the installation of the DCU, see DCU3900 Installation Guide.

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About This Chapter

This chapter describes the process of installing an RHUB. RHUBs are classified into those with electrical transmission ports and those with no electrical transmission ports. Unless otherwise specified, this document uses the RHUBs with no electrical transmission ports as an example.

6 Installing an RHUB

6.1 Information About the Installation

This section describes the information to be learnt before RHUB installation, including the RHUB installation scenarios, clearance, and installation environment.

6.2 Installation Process

The RHUB installation involves installing an RHUB module, installing RHUB cables, checking the RHUB hardware installation, and powering on the RHUB.

6.3 Installing an RHUB

An RHUB can be installed in a cabinet, rack, shelf, or on a wall.

6.4 Installing RHUB Cables

This section describes how to install cables for an RHUB.

6.5 Checking the RHUB Hardware Installation

After an RHUB is installed, check the installation of hardware including the devices and related cables.

6.6 Power-on Check on an RHUB

This section describes the power-on check on the RHUB after the RHUB hardware is installed and checked.

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6.1 Information About the Installation

This section describes the information to be learnt before RHUB installation, including the RHUB installation scenarios, clearance, and installation environment.

6.1.1 Installation Scenarios

An RHUB can be installed in a 19-inch cabinet, rack, shelf, or on a wall.

NOTICE

To prevent the RHUB from water drops, the RHUB panel must not face upwards (shown in

Figure 6-1) in any installation scenarios.

Figure 6-1 Improper installation mode

6 Installing an RHUB

The RHUB mounting ears are installed in standard mode or reverse mode. The reverse mode is used by default. The two installation modes are defined as follows:

l In standard mode, the front of the mounting ear is aligned with the RHUB panel, as

shown in Figure 6-2.

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6 Installing an RHUB

Figure 6-2 Installing mounting ears in standard mode

l In reverse mode, the front of the mounting ear is 31 mm away from the RHUB panel, as

shown in Figure 6-3.

Figure 6-3 Installing mounting ears in reverse mode

Installing an RHUB in a 19-Inch Cabinet or Rack

Installing an RHUB in a 19-inch cabinet or rack: Secure the mounting ear to the mounting bracket by using M6 screws.

l If there are no other modules installed in the 1 U space near the RHUB, install the

RHUB directly. Otherwise, remove the modules before installing the RHUB.

l Before installation, you need to check the installation mode supported by the rack and

adjust the position of the mounting ear.

Figure 6-4 and Figure 6-5 show RHUBs installed in a cabinet or rack, respectively.

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6 Installing an RHUB

Figure 6-4 Installing an RHUB in a 19-inch cabinet or rack in standard mode

Figure 6-5 Installing an RHUB in a 19-inch cabinet in reverse mode

Installing an RHUB in a 19-Inch Shelf

When an RHUB is installed in a 19-inch shelf, the shelf must be installed on a wall. One shelf can house multiple RHUBs with 1 U space between two RHUBs.

Figure 6-6 and Figure 6-7 show RHUBs installed in a 19-inch shelf.

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6 Installing an RHUB

Figure 6-6 RHUB installed in a 19-inch shelf in standard mode

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6 Installing an RHUB

Figure 6-7 RHUB installed in a 19-inch shelf in reverse mode

Installing an RHUB on a Wall

An RHUB can be installed on a wall.

The wall on which an RHUB is installed must meet the following requirements:

l When a single RHUB is installed, the wall must have a capacity of bearing at least four

times the weight of the RHUB.

l Expansion bolts must be tightened to 10 N·m (88.507 bf·in.) to ensure the bolts work

properly and the wall remains intact without cracks in it.

Figure 6-8 shows an RHUB installed on a wall.

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6 Installing an RHUB

Figure 6-8 RHUB installed on a wall

6.1.2 Installation Clearance Requirements

When an RHUB is installed in a 19-inch cabinet, rack, shelf, or on a wall, a minimum clearance is required for easy cabling and operation and maintenance. A recommended installation clearance is provided based on experience.

NOTICE

l Do not install or place inflammable materials above or under an RHUB.

l A clearance of 350 mm must be reserved in front of the air intake vent of the fan of the

power supply unit (PSU) for maintenance.

Figure 6-9 shows the installation clearance for the RHUB installed in a 19-inch cabinet, rack,

or shelf.

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6 Installing an RHUB

Figure 6-9 Installation clearance for an RHUB installed in a 19-inch cabinet, rack, or shelf

Figure 6-10 and Figure 6-11 shows the recommended and minimum installation clearance

respectively when the RHUB is installed on a wall.

Figure 6-10 Recommended installation clearance for a wall-mounted RHUB (unit: mm)

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6 Installing an RHUB

Figure 6-11 Minimum installation clearance for a wall-mounted RHUB (unit: mm)

6.1.3 Installation Environment

The installation environment of an RHUB involves the running environment specifications for the RHUB and other specifications.

RHUB Running Environment Specifications

Table 6-1 shows the environment specifications for the RHUB installed indoors.

l The temperature and humidity of the installation position must ensure normal operation.

A cool and ventilated place is recommended.

l The heat dissipation holes on the RHUB cannot be blocked.

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6 Installing an RHUB

Table 6-1 RHUB environment specifications

Specifi cations

Operati ng tempera

Installation Scenario

Installed on a wall or in a 19inch rack.

RHUB

Condition Remarks

Quantity

N/A -5°C to

+50°C

ture

Installed in a shelf.

1 -5°C to

+45°C

2 -5°C to

+43°C

3 -5°C to

+40°C

Relativ e

Installed in all scenarios.

N/A 5% RH to

95% RH humidit y

Altitude N/A N/A -60 m to

+1800 m

1800 m to

4000 m

N/A

Works properly.

Above the 1800 m altitude, the maximum operating temperature decreases by 1°C each time the altitude increases by 220 m.

NOTE

Installing more than one RHUB, 1 U space is required between two RHUBs.

Other Running Environment Specifications

l The RHUB cannot be installed at an air outlet of the heat dissipation box of an air

conditioner or other heat-generating appliances.

l The RHUB cannot be installed near a strong heat source.

l The RHUB cannot be installed in a position with water dripping, such as outdoor

equipment of air conditioners, pipe, and leaking or dripping roofs.

l The installation position must be far from rains. If the RHUB is installed on a wall, there

must be no window on either side of the wall.

l The installation position must be far away from high voltage, highly corrosive devices,

flammable or explosive substances, and electromagnetic interference (such as power stations, high-voltage substations, and wired TV towers.

l The RHUB must be installed in a dry, ventilating, and dust-proof place.

l If the RHUB is installed in parking areas or basements, the installation position must be

well-ventilated.

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Requirements for the Upper-level Circuit Breaker

Type C upper-level AC circuit breakers or slow-blow fuses must be used for power cables. The maximum current must not exceed 16 A. Table 6-2 describes the recommended specifications.

Table 6-2 Circuit breaker specifications for power cables

6 Installing an RHUB

Power Supply

220 V AC single-phase ≥ 6 A

110 V AC dual-live-wire

110 V AC single-phase ≥ 12 A

6.2 Installation Process

The RHUB installation involves installing an RHUB module, installing RHUB cables, checking the RHUB hardware installation, and powering on the RHUB.

Figure 6-12 shows the RHUB installation process.

Upper-level AC Circuit Breaker (For a single RHUB)

Cross-Sectional Area of the Input Power Cable

1.5 mm

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6 Installing an RHUB

Figure 6-12 RHUB installation process

6.3 Installing an RHUB

An RHUB can be installed in a cabinet, rack, shelf, or on a wall.

6.3.1 Installing an RHUB in a 19-Inch Cabinet or Rack

This section describes how to install an RHUB in a 19-inch cabinet.

Procedure

l The following describes how to install an RHUB with mounting ears in reverse mode:

NOTE

If necessary, request one more person for assistance.

a. With one hand holding it, align the mounting holes with the installation holes,

slowly push the RHUB into the required position in the cabinet, as shown in Figure

6-13.

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6 Installing an RHUB

Figure 6-13 Pushing an RHUB into a cabinet

b. Use a torque screwdriver or Phillips screwdriver to tighten the four M6×16 screws

with a torque of 2 N•m, as shown in Figure 6-14.

Figure 6-14 Tightening screws

l The following describes how to install an RHUB with mounting ears aligned with the

RHUB panel:

NOTE

If necessary, request one more person for assistance.

a. Remove the mounting ears on both sides of the RHUB by removing the four M4×8

screws, as shown in Figure 6-15.

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6 Installing an RHUB

Figure 6-15 Removing mounting ears and screws

b. Use a torque screwdriver or Phillips screwdriver to tighten the four M4×8 screws

with a torque of 1.4 N•m to install the removed mounting ears again, as shown in

Figure 6-16. The mounting ears must be aligned with the RHUB panel.

Figure 6-16 Installing mounting ears in standard mode

c. With one hand holding it, align the mounting holes with the installation holes,

slowly push the RHUB into the required position in the cabinet, as shown in Figure

6-17.

Issue 06 (2015-10-30) Huawei Proprietary and Confidential

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