Huawei Technologies AP4050DN-E Wireless LAN Access Point User Manual Hardware Installation and Maintenance Guide

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AP4050DN-E

Hardware Installation and

Maintenance Guide

Issue 05

Date 2018-02-02

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://e.huawei.com

Issue 05 (2018-02-02) Huawei Proprietary and Confidential

About This Document

Overview

This document describes hardware features of the AP4050DN-E and provides basic

installation methods.

Intended Audience

This document is intended for network engineers responsible for WLAN installation and

maintenance. You should have experience in network device installation and maintenance.

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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Symbol Description

NOTE

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.

Change History

Changes between document issues are cumulative. The latest document issue contains all

changes made in previous issues.

Issue 05 (2018-02-02)

This version has the following updates:

The following information is modified:

l2.6.1 Installing the Device on a Wall

l2.6.2 Installing the Device on a Ceiling

l2.6.3 Installing the Device on a T-rail

l2.6.4 Removing an AP

Issue 04 (2017-08-31)

This version has the following updates:

The following information is modified:

l1.1 Device Structure

l2.3 Unpacking the Equipment

Issue 03 (2017-01-20)

This version has the following updates:

The following information is modified:

l2.6.1 Installing the Device on a Wall

l2.6.2 Installing the Device on a Ceiling

l2.6.3 Installing the Device on a T-rail

Issue 02 (2016-09-30)

This version has the following updates:

The following information is modified:

2.7 Cable Connection

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iii

Issue 01 (2016-07-22)

Initial commercial release

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Contents

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

1 Product Overview..........................................................................................................................1

1.1 Device Structure............................................................................................................................................................. 1

1.2 Indicator Description...................................................................................................................................................... 3

1.3 Basic Specifications........................................................................................................................................................4

1.4 Ordering Information......................................................................................................................................................5

2 AP Installation............................................................................................................................... 6

2.1 Preparing for Installation................................................................................................................................................ 6

2.2 Installation Flowchart..................................................................................................................................................... 8

2.3 Unpacking the Equipment.............................................................................................................................................. 8

2.4 Determining the Installation Position............................................................................................................................. 9

2.5 Installing an IoT Card...................................................................................................................................................10

2.6 Installing the AP........................................................................................................................................................... 14

2.6.1 Installing the Device on a Wall..................................................................................................................................14

2.6.2 Installing the Device on a Ceiling............................................................................................................................. 17

2.6.3 Installing the Device on a T-rail................................................................................................................................ 18

2.6.4 Removing an AP........................................................................................................................................................20

2.7 Cable Connection......................................................................................................................................................... 20

2.8 Connecting the Security Lock...................................................................................................................................... 23

2.9 Checking the Device After Installation........................................................................................................................ 23

2.10 Powering on the AP....................................................................................................................................................24

3 Logging In to the Device............................................................................................................ 25

3.1 Logging In to the Device Using STelnet/Telnet........................................................................................................... 25

3.2 Logging In to the Device Through the Web System.................................................................................................... 27

3.3 Logging In to the Device Through the Console Port....................................................................................................29

4 Hardware Failures....................................................................................................................... 32

4.1 A Device Fails to Be Powered On................................................................................................................................32

5 Appendix.......................................................................................................................................35

5.1 On-site Cable Assembly and Installation..................................................................................................................... 35

5.1.1 Cable Assembly Precautions..................................................................................................................................... 35

5.1.2 Assembling Power Cables......................................................................................................................................... 36

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5.1.2.1 Assembling a DC 2-Pin Round Connector (A)...................................................................................................... 36

5.1.2.2 Assembling a DC 2-Pin Round Connector (B)...................................................................................................... 41

5.1.2.3 Assembling the OT Terminal and Power Cable..................................................................................................... 47

5.1.2.4 Assembling the JG Terminal and Power Cable...................................................................................................... 51

5.1.2.5 Assembling the Cord End Terminal and the Power Cable..................................................................................... 53

5.1.3 Assembling Ethernet Cables......................................................................................................................................56

5.1.3.1 Assembling the Shielded RJ45 Connector and Ethernet Cable..............................................................................56

5.1.3.2 Assembling an Optimized Shielded RJ45 Connector and SFTP Network Cables.................................................62

5.1.3.3 Assembling an Integrated Shielded RJ45 Connector and SFTP Network Cables................................................. 66

5.1.3.4 Assembling a Shielded RJ45 Connector and an FTP Network Cable....................................................................70

5.1.3.5 Assembling an Unshielded RJ45 Connector and Ethernet Cable...........................................................................75

5.1.3.6 Checking the Appearance of Contact Strips...........................................................................................................77

5.1.3.7 Testing the Connection of Assembled Cables........................................................................................................ 80

5.1.3.8 Common Network Cable Faults and Preventive Measures.................................................................................... 83

5.1.4 Assembling Feeders...................................................................................................................................................84

5.1.4.1 Assembling the Straight Male Coaxial N Connector and the 1/2'' Feeder............................................................. 84

5.1.4.2 Assembling a Straight Male Coaxial N Connector and an RG8U Feeder..............................................................88

5.1.5 Installing Cable Accessories......................................................................................................................................94

5.1.5.1 Precautions for Installing Cable Accessories......................................................................................................... 94

5.1.5.2 Installing Power Adapters...................................................................................................................................... 95

5.1.5.2.1 Installing the OT Terminal...................................................................................................................................95

5.1.5.2.2 Installing the Cord End Terminal........................................................................................................................ 98

5.1.5.2.3 Installing a 2-Pin Round Connector and a DC Power Cable...............................................................................99

5.1.5.3 Installing Ethernet Adapters................................................................................................................................. 102

5.1.5.3.1 Installing a Shielded Ethernet Connector.......................................................................................................... 103

5.1.5.3.2 Installing an Unshielded Ethernet Connector....................................................................................................104

5.1.5.4 Installing Fiber Connectors.................................................................................................................................. 106

5.1.5.4.1 Cleaning Fiber Connectors................................................................................................................................ 106

5.1.5.4.2 Installing an FC Fiber Connector...................................................................................................................... 106

5.1.5.4.3 Installing an LC Fiber Connector...................................................................................................................... 108

5.1.5.4.4 Installing the SC Fiber Connector..................................................................................................................... 110

5.1.5.4.5 Installing an MPO Connector............................................................................................................................ 111

5.1.6 Replacing the Mold of the Crimping Tool...............................................................................................................113

5.2 Environmental Requirements for Device Operation.................................................................................................. 116

5.2.1 Environmental Requirements for an Equipment Room...........................................................................................116

5.2.1.1 Requirements for Selecting a Site for an Equipment Room.................................................................................116

5.2.1.2 Equipment Room Layout......................................................................................................................................117

5.2.1.3 Construction Requirements for the Equipment Room..........................................................................................118

5.2.1.4 Equipment Room Environment............................................................................................................................ 119

5.2.1.5 Requirements for Corrosive Gases....................................................................................................................... 120

5.2.1.6 Requirements for ESD Prevention....................................................................................................................... 121

5.2.1.7 Electromagnetism Requirements for the Equipment Room................................................................................. 121

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5.2.1.8 Requirements for Lightning Proof Grounding..................................................................................................... 121

5.2.2 Requirements for Power Supply..............................................................................................................................123

5.2.2.1 Requirements for AC Power Supply.................................................................................................................... 123

5.2.2.2 Recommendations for AC Power Supply.............................................................................................................124

5.2.2.3 Requirements for DC Power Supply.................................................................................................................... 125

5.2.2.4 Recommendations for DC Power Supply.............................................................................................................125

5.3 Equipment Grounding Specifications.........................................................................................................................126

5.3.1 General Grounding Specifications...........................................................................................................................126

5.3.2 Grounding Specifications for an Equipment Room................................................................................................ 126

5.3.3 Grounding Specifications for Devices.....................................................................................................................126

5.3.4 Grounding Specifications for Communications Power Supply...............................................................................127

5.3.5 Grounding Specifications for Signal Cables........................................................................................................... 128

5.3.6 Specifications for Laying Out Grounding Cables................................................................................................... 128

5.4 Engineering Labels for Cables................................................................................................................................... 129

5.4.1 Introduction to Labels..............................................................................................................................................129

5.4.1.1 Label Materials..................................................................................................................................................... 129

5.4.1.2 Type and Structure................................................................................................................................................130

5.4.1.3 Label Printing....................................................................................................................................................... 131

5.4.1.4 Writing Labels...................................................................................................................................................... 133

5.4.1.5 Attaching Labels...................................................................................................................................................134

5.4.1.6 Contents of Engineering Labels........................................................................................................................... 136

5.4.1.7 Precautions for Using Engineering Labels........................................................................................................... 136

5.4.2 Engineering Labels for Optical Fibers.....................................................................................................................137

5.4.2.1 Labels for the Optical Fibers Connecting Devices...............................................................................................137

5.4.2.2 Labels for the Optical Fibers Connecting the Device and an ODF...................................................................... 138

5.4.3 Engineering Labels for Network Cables................................................................................................................. 139

5.4.4 Engineering Labels for User Cables........................................................................................................................141

5.4.5 Engineering Labels for Power Cables..................................................................................................................... 142

5.4.5.1 Engineering Labels for DC Power Cables............................................................................................................142

5.4.5.2 Engineering Labels for AC Power Cables............................................................................................................143

5.5 Guide to Using Optical Modules................................................................................................................................ 144

5.6 Fault Tag..................................................................................................................................................................... 148

5.7 Installation Checklist.................................................................................................................................................. 149

5.8 Guide to Making Drip Loops......................................................................................................................................156

5.9 Power Adaptation Solution.........................................................................................................................................158

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1 Product Overview

About This Chapter

The AP4050DN-E has the following advantages:

l2x2 MIMO

lGood service support capabilities

lHigh reliability

lHigh security

lSimple network deployment

lAutomatic AC discovery and configuration

lReal-time management and maintenance

In compliance with 802.11ac Wave 2, the AP4050DN-E can provide gigabit access for

wireless users, greatly improving wireless user experience.

The AP4050DN-E provides basic 802.11n/ac WLANs for scenarios that can integrate

enhanced applications (such as Bluetooth and RFID), such as shopping malls, supermarkets,

healthcare, warehouse, manufacturing, and logistics. It provides flexible distribution options

in different environments.

A cloud AP must be used together with a cloud server.

1.1 Device Structure

1.2 Indicator Description

1.3 Basic Specifications

1.4 Ordering Information

1.1 Device Structure

Figure 1-1 shows the appearance of the AP4050DN-E.

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Figure 1-1 Appearance of the AP4050DN-E

175

Table 1-1 describes ports on the AP4050DN-E.

Table 1-1 Interface description

No. Name Description

1 Default Reset button: restores factory settings and restarts the

device if you hold down the button more than 3 seconds.

2 USB port Connects to a USB flash drive to extend the storage space

of the AP, and provides a maximum of 2.5 W power.

3 Console Connects to a maintenance terminal for AP configuration

and management.

4 GE1/

PoE_OUT

10/100/1000M port: connects to the wired Ethernet and

supports PoE output.

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No. Name Description

5 GE0/PoE_IN 10/100/1000M port: connects to the wired Ethernet and

supports PoE input.

6 DC 12V Connects a 12 V power adapter to the AP.

7 Security slot Connects to a security lock.

8 Radio port Connects an antenna to an IoT card through a radio cable.

NOTE

lThe AP supports the following power supply modes: PoE power supply and DC power supply.

lWhen the AP uses the DC power supply, use a power adapter for power supply; otherwise, the AP

may be damaged.

lFor power adapter models, see 5.9 Power Adaptation Solution.

1.2 Indicator Description

The AP4050DN-E provides only a single indicator, as shown in Figure 1-2.

NOTE

Indicator colors may vary slightly at different temperature.

Figure 1-2 Indicator

Indicator

Table 1-2 Description about the single indicator

Type Color Status Description

Default

status

after

power-on

Green Steady on The AP is just powered on and the software is not

started yet.

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Type Color Status Description

Software

startup

status

Green Steady on

after

blinking

once

After the system is reset and starts uploading the

software, the indicator blinks green once. Until the

software is uploaded and started, the indicator

remains steady green.

Running

status

Green Blinking

once

every 2s

(0.5 Hz)

lThe system is running properly, the Ethernet

connection is normal, and STAs are associated

with the AP.

lThe system enters the Uboot CLI.

Blinking

once

every 5s

(0.2 Hz)

The system is running properly, the Ethernet

connection is normal, and no STA is associated

with the AP. The system is in low power

consumption state.

Alarm Green Blinking

once

every

0.25s (4

Hz)

lThe software is being upgraded.

lAfter the software is loaded and started, the AP

requests to go online if it works in Fit AP or

cloud-based management mode. The indicator

remains in this state before the AP successfully

goes online.

lThe AP works in Fit AP or cloud-based

management mode and fails to go online.

Fault Red Steady on A fault that affects services has occurred, such as a

DRAM detection failure or system software

loading failure. The fault cannot be automatically

rectified and must be rectified manually.

1.3 Basic Specifications

Table 1-3 provides basic specifications of the AP4050DN-E.

Table 1-3 Basic specifications

Item Description

Physical

specifications

Dimensions (H x

W x D)

53 mm x 220 mm x 220 mm

Weight 0.84 kg

System memory l256 MB DDR3L

l64 MB NOR FLASH

Power

specifications

Power input lDC: 12 V ± 10%

lPoE power supply: in compliance with IEEE

802.3at

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Item Description

Maximum power

consumption

16.0 W (excluding the output power of the USB port,

IoT card, or PoE_OUT port)

NOTE

The actual maximum power consumption depends on local

laws and regulations.

Environment

specifications

Operating

temperature

l-60 m to +1800 m: -10°C to +50°C

l1800 m to 5000 m: Temperature decreases by 1°C

every time the altitude increases 300 m.

Storage

temperature

-40°C to +70°C

Operating

humidity

5% to 95% (non-condensing)

IP rating IP41

Atmospheric

pressure

53 kPa to 106 kPa

1.4 Ordering Information

To place an order, contact technical support personnel.

Part Number Description

50082944 AP4050DN-E Mainframe(11ac wave2,Dual Band,Built-in

Antenna,BT,USB,PSE,IoT Slot)

50083055 AP4050DN-E Mainframe Bundle (AP4050DN-E Mainframe*8)

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2 AP Installation

About This Chapter

2.1 Preparing for Installation

2.2 Installation Flowchart

2.3 Unpacking the Equipment

2.4 Determining the Installation Position

2.5 Installing an IoT Card

2.6 Installing the AP

2.7 Cable Connection

2.8 Connecting the Security Lock

2.9 Checking the Device After Installation

2.10 Powering on the AP

2.1 Preparing for Installation

This section describes safety precautions and tool preparations for AP installation.

Safety Precautions

lTake proper measures to prevent injuries and device damage.

lPlace the device in a dry and flat position away from any liquid and prevent the device

from slipping.

lKeep the device clean.

lDo not put the device and tools in the aisles.

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CAUTION

Only the qualified personnel are permitted to install and remove the device and its

accessories. Before installation and operation, read the safety precautions carefully.

Tool Preparation

To install APs, prepare tools listed in Table 2-1.

Table 2-1 Tools

Phillips screwdriver Protective gloves ESD gloves

Slip-proof glove Marker Hammer drill

Claw hammer Diagonal pliers Wire stripper

RJ45 crimping tool Cable cutter Network cable tester

Multimeter Ladder Safety helmet

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Safety belt Anti-skid shoes -

2.2 Installation Flowchart

The following figure shows the process for installing an AP.

Figure 2-1 Installation flowchart

2.3 Unpacking the Equipment

Before unpacking the carton, ensure that the packing carton is intact and not damaged or

soaked. Stop unpacking if the equipment is rusted or soggy. Then, investigate causes and

contact the supplier.

After unpacking, check items in the carton against the packing list. If any item is missing,

contact the supplier or agent.

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Usually, the packing list contains the following items.

lAP device

lSheet metal mounting bracket

lAdjustable buckle

lExpansion screws

lQuick start guide

lWarranty card

lMAC address label

lSN label

NOTE

If a PoE adapter or a DC power adapter is required, you need to purchase it separately. For DC power adapter

models, see 5.9 Power Adaptation Solution.

2.4 Determining the Installation Position

Indoor APs are usually mounted on a wall or ceiling using sheet metal mounting brackets.

The installation position is determined by the site survey. There must be at least 200 mm

clearance between the cabling end of the AP and the wall. Figure 2-2 shows space

requirements.

Figure 2-2 Mounting an AP

≥200 mm

Floor

Celling

Wall

When determining the AP installation position, comply with the following rules:

lTry to reduce the number of obstacles, such as walls, between the AP and user terminals.

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lPlace the AP far away from electronic devices that may produce radio interference, such

as microwave ovens, other APs, antennas, and other radio communication devices. For

details, see Table 2-2.

lInstall the AP in a hidden position that does not affect daily lives and work of residents.

lInstall the AP in a site that is free from leaking or dripping water, heavy dew, and

humidity, and take protective measures to prevent water from flowing into the equipment

along the cable.

lDo not install the AP in an environment with high temperature, dust, poisonous gases,

flammable or explosive objects, electromagnetic interference (from a radar station, radio

station, or substation), unstable voltage, violent shakes, or strong noise.

Table 2-2 General anti-interference requirements

Scenario Deployment Distance Requirement

Indoor

installation

lThere should be at least a 7 m distance between antennas.

lThe antennas should be placed at least 5 m from the 4G antennas of

the carrier.

lThe antennas should be placed far away from electronic devices that

may produce interference, such as microwave ovens.

NOTE

If antennas are embedded into APs, the deployment distance requirements on the antennas are those on APs.

2.5 Installing an IoT Card

An AP4050DN-E has three IoT slots supporting ANT and RFID cards. An ANT card has only

one radio port while an RFID card has two radio ports. Depending on card characteristics, IoT

cards can be installed in one-cable per card or two-cable per card mode. Users need to install

IoT cards onsite as required.

One-Cable per Card

In this mode, one to three ANT or RFID cards can be installed.

1. Remove the front cover of an AP.

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2. Remove rubber plugs based on the number of IoT cards to be installed. One rubber plug

maps one IoT card.

Rubber plugs

3. Place IoT cards in the slots and tighten the cards using M2x7 screws (with a tightening

torque of 1.5 N•m). You are advised to start installation from the card1 slot.

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1. AP4050DN-E 2. IoT card 3. M2x7 screws

4. Install RF cables and sort cables following the instruction shown in the figure.

NOTE

lThe diagonal size of a hexagon SMA connector must be less than or equal to 8 mm; otherwise, the

cable cannot be installed.

5. Slide the cover back.

Two-Cable per Card

In this mode, only one RFID card can be installed. The card1 slot is preferentially used.

1. Remove the front cover of an AP.

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2. Remove the two rubber plugs.

Rubber plugs

3. Place the card in the card1 slot and tighten the card using M2x7 screws (with a

tightening torque of 1.5 N•m).

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1. AP4050DN-E 2. IoT card 3. M2x7 screws

4. Install RF cables and sort cables following the instruction shown in the figure.

NOTE

lThe diagonal size of a hexagon SMA connector must be less than or equal to 8 mm; otherwise, the

cable cannot be installed.

5. Slide the cover back.

2.6 Installing the AP

NOTE

Remove the protective film on the surface before installation to prevent electrostatic discharge.

2.6.1 Installing the Device on a Wall

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NOTE

A wall for installing the device needs to meet the following requirements:

lThe wall can bear the weight of four times the total weight of the device and mounting bracket

without damage.

lWhen the tightening torx of a screw reaches 5 N•m, the screw still properly works, without crack

or damage on the wall.

Mounting kits and expansion bolts are required to install the AP on a wall. The procedures are

as follows:

When fixing the sheet metal mounting bracket, ensure that the arrows point upwards on the

label.

1. Fix a mounting bracket to the wall against the wall and mark the drilling positions

through holes of the bracket.

59 mm

85 mm

2. Use a 6 mm drill bit to drill 25 mm to 30 mm deep holes in the drilling positions.

Hammer the expansion tubes into the holes until the expansion tubes are completely

embedded into the wall.

25 mm~30 mm

Ø6

3. Fix the mounting bracket to the wall and use the Phillips screwdriver to fasten three

expansion screws into the expansion tubes.

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1.7 N•m

ST3.5

4. Connect the cables. For details, see 2.7 Cable Connection.

5. Align the rubber feet of the device over the mounting slots on the mounting bracket and

vertically push the AP to secure it. When the spring clip is popped up, push the AP

downward until it snaps into place (you can hear a click).

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NOTE

In a scenario with heavy vibrations, tighten the AP to the mounting bracket using M4x30 screws with a

torque of 1.4N•m. This prevents the AP falling off from due to vibrations. In normal scenarios, you do not

need to install these screws.

2.6.2 Installing the Device on a Ceiling

NOTE

A ceiling needs to bear the weight of four times the total weight of the device and mounting bracket

without damage.

1. Remove a ceiling tile, determine locations of mounting holes based on the distance

between two installation holes on the mounting bracket, use a hammer drill to drill holes

on the ceiling tile, and fix the mounting bracket to the ceiling tile(with a tightening

torque of 1.4 N•m).

The screws provided for ceiling-mounting of APs are 30 mm long and can be used to fix

an AP on a ceiling no thicker than 15 mm. To install APs on thicker ceilings, you need to

purchase longer screws.

47 mm

1. Ceiling tile 2. Adjustable buckle 3. M4x30 screw

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2. Connect the cables. For details, see 2.7 Cable Connection.

3. Align the rubber feet of the device over the mounting slots on the mounting bracket and

vertically push the AP to secure it. When the spring clip is popped up, push the AP

horizontally until it snaps into place (you can hear a click).

NOTE

lEnsure that the AP is correctly installed on the mounting bracket and there is 200 mm space above

and around the AP for maintenance.

lIn a scenario with heavy vibrations, tighten the AP to the mounting bracket using M4x30 screws

with a torque of 1.4N•m. This prevents the AP falling off from due to vibrations. In normal

scenarios, you do not need to install these screws.

2.6.3 Installing the Device on a T-rail

A T-rail needs to bear the weight of four times the total weight of the device and mounting

bracket without damage. Figure 2-3 shows the T-rail dimensions requirements (t: thickness;

w: width).

Figure 2-3 Section of a T-rail

19 mm ≤ w ≤ 29 mm

0.6 mm ≤ t ≤ 1.0 mm

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1. Remove two ceiling tiles around the T-rail, use screws to fix the adjustable buckle to the

mounting bracket, hook the adjustable buckle to the T-rail, and secure the screw on the

adjustable buckle to fasten the mounting bracket and T-rail.

1. T-rail 2. M4x30 Screw 3. Adjustable buckle 4. Sheet metal mounting bracket

2. Connect the cables. For details, see 2.7 Cable Connection.

3. Align the rubber feet of the device over the mounting slots on the mounting bracket and

vertically push the AP to secure it. When the spring clip is popped up, push the AP

horizontally until it snaps into place (you can hear a click).

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NOTE

lBefore fixing the adjustable buckle with a screw, adjust the buckle to a proper position based on the

T-rail width.

lEnsure that the AP is correctly installed on the mounting bracket and there is 200 mm space above

and around the AP for maintenance.

lIn a scenario with heavy vibrations, tighten the AP to the mounting bracket using M4x30 screws

with a torque of 1.4N•m. This prevents the AP falling off from due to vibrations. In normal

scenarios, you do not need to install these screws.

2.6.4 Removing an AP

Flip the spring clip on the mounting bracket and slip the AP towards the spring clip. Release

the spring clip until the rubber feet of the AP enter the mounting keyholes. Remove the AP

from the mounting bracket.

Figure 2-4 Removing an AP

NOTE

If a captive screw is installed, remove the screw and then follow the preceding steps to uninstall the AP.

2.7 Cable Connection

Table 2-3 describes the cable connections.

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Figure 2-5 Appearance of the AP4050DN-E

1 2

Table 2-3 Cable connections

No. Cable or Device Description

1 USB flash drive Connects to a USB flash drive to extend the storage space

of the AP, and provides a maximum of 2.5 W power.

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No. Cable or Device Description

2 Network cable lThe service network cable and PoE input cable cannot

be connected to the console port. Otherwise, the AP

may be damaged when using PoE power supply.

lIf the AP needs to connect to the Ethernet, ensure that

the Ethernet cable is working properly. If the Ethernet

cable is not working properly, for example, RJ45

connectors are short-circuited, the AP may fail to be

powered on or fail to work. Before connecting an

Ethernet cable to the AP, use the cable test tool to

check whether the cable is qualified. If the cable is

unqualified, replace it.

NOTICE

lDo not insert a PoE input cable into the GE1/PoE_OUT port.

lCAT5e cables or higher must be used.

lThe length of a cable in the GE0/PoE_IN interface cannot

exceed 100 m.

lThe length of a cable cannot exceed 40 m when the GE1/

PoE_OUT port has PoE output and cannot exceed 100 m

when there is no PoE output.

lThe GE1/PoE_OUT port of an AP can provide power output

only works in 802.3at PoE mode. The output power varies at

different connection status:

lThe maximum output power is 7 W when no IoT card is

connected to the AP and the USB port is not used.

lThe maximum output power is 5.5 W when only one IoT

card is connected to the AP and the USB port is not used.

lThe PoE_OUT function is automatically disabled when

two or more IoT cards are connected to the AP or the

USB port is used.

3DC power adapter When the AP uses the DC power supply, use a power

adapter for power supply; otherwise, the AP may be

damaged.

4 RF cable Connects to an IoT card or an antenna.

NOTE

The AP is powered by either the DC power supply or PoE power supply that backs up each other.

When installing a cable, you must make a drip loop to prevent water from flowing into

devices along the cable. For the method of making the drip loop, see 5.8 Guide to Making

Drip Loops.

Pay attention to the following points when bundling the cables:

lDifferent types of cables must be separately routed with the minimum spacing of 30 mm

and cannot be entangled or crossed. Cables should be parallel or separated using

dedicated separators.

lBundled cables are closely arranged, straight, tidy, and undamaged.

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lCable ties are bound neatly facing the same direction, and those at the same horizontal

line must be in a straight line. Cable tie tails should be cut smoothly and evenly.

lLabels or nameplates must be attached to the cables after they are installed.

2.8 Connecting the Security Lock

There is a security slot on the device. You can lock the device to an immovable object to

prevent theft. The detailed procedures are as follows:

1. Fasten the cable of the security lock to an immovable object around.

2. Insert the security lock into the security slot and lock it.

Lock hole

Security lock

NOTE

You need to purchase the security lock separately.

2.9 Checking the Device After Installation

Table 2-4 shows the items to be checked after installation is complete. For more details, see

Installation Checklist in the appendix.

Table 2-4 Installation checklist

No. Check Item

1 The device is installed by strictly following the design draft. The

installation position meets space requirements, with maintenance space

reserved.

2 The device is securely installed.

3 The power cables are intact and not spliced.

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No. Check Item

4 Terminals of the power cables are welded or cramped firmly.

5 All power cables are not short-circuited or reversely connected and must

be intact with no damage.

6 The power cables and ground cables are separated from other cables and

bundled separately.

7 Connectors of signal cables are complete, intact, and tightly connected.

The signal cables are not damaged or broken.

8 Labels on cables are clear and correct.

2.10 Powering on the AP

After the AP is powered on, observe the indicator on the AP to check the system running

status. For details, see 1.2 Indicator Description.

NOTE

Do not frequently power on and off the device.

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3 Logging In to the Device

About This Chapter

3.1 Logging In to the Device Using STelnet/Telnet

3.2 Logging In to the Device Through the Web System

3.3 Logging In to the Device Through the Console Port

3.1 Logging In to the Device Using STelnet/Telnet

You can log in to the device using STelnet V2 or Telnet to configure, manage, and maintain

the device in the CLI.

NOTE

lBy default, only the STelnet V2 service is enabled on the device.

lTelnet has security vulnerabilities. You are not advised to enable the Telnet service.

Device connections are classified into wired and wireless connections.

lIn versions earlier than V200R007C20, APs support wired connections.

lIn V200R007C20 and later, Fat APs support both wired and wireless connections, and

Fit APs and cloud APs support wired connections.

Before logging in to the device, complete the following tasks:

lPower on the device.

lPrepare network cables used to connect device interfaces for wired connections. No

network cable is required for wireless connections.

The following table lists the default configuration of the device. You are advised to change the

default user name and password on your first login.

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Table 3-1 Default configuration of the device

Parameter Default Setting

User name admin

Password admin@huawei.com

IP address lWired connection: 169.254.1.1

lWireless connection: 192.168.1.1

Subnet mask lWired connection: 255.255.0.0

lWireless connection: 255.255.255.0

SSID HUAWEI-XXXX, applicable to wireless

connections of Fat APs (XXXX specifies the

last four bits of the AP's MAC address.)

Wireless password None, applicable to wireless connections of

Fat APs

NOTE

For a Fit AP and cloud AP, you can perform the following operations:

lIf the Fit AP is already online on the AC, you can remotely log in to the AC on a local terminal and run

the display ap all command to check the IP address of the device.

lIf the Fit AP in any version is offline or the Fit AP in V200R007C10 or later does not go online, you can

access the device through the offline management VAP for operations. By default, the SSID of the offline

management VAP is hw_manage_xxxx (xxxx specifies the last four bits of the AP's MAC address) and

the password is hw_manage. After the IP address of the PC is set to 169.254.2.x/24 (169.254.2.1

excluded and 169.254.2.100 recommended), the connection is set up, you can log in to the AP using

STelnet for operations.

lIf the cloud AP is offline or does not go online, you can access the device through the offline management

VAP for operations. By default, the SSID of the offline management VAP is hw_manage_xxxx (xxxx

specifies the last four bits of the AP's MAC address) and the password is hw_manage. After the PC

dynamically obtains an IP address and connects to the AP, you can log in to the AP using STelnet for

operations.

The following example uses the default parameters and is used for reference only.

Wired Connection Mode

Step 1 Use a network cable to connect a PC to any network port of the AP or that of the switch on

the same network segment as the AP.

Step 2 Assign the PC with an IP address on the same network segment as the default IP address of

the device so that the PC and device are reachable to each other.

If the device uses the default settings, the IP address of the PC must be in the network

segment 169.254.0.0/16 but cannot be 169.254.1.1. 169.254.1.100 is recommended.

Step 3 Start the CLI on the PC and access the IP address 169.254.1.1 of the device using STelnet V2.

Step 4 Enter the user name and password as prompted to log in to the user interface.

----End

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Wireless Connection Mode

Step 1 By default, STAs search for the WLAN HUAWEI-XXXX within the wireless signal coverage

of a Fat AP. STAs can access the WLAN without entering the password. If the SSID and

password have been configured, use the specified SSID and password to set up a wireless

connection.

Step 2 Start the CLI on the STA and access the IP address 192.168.1.1 of the device using STelnet

V2.

Step 3 Enter the user name and password as prompted to log in to the user interface.

----End

Method of Obtaining Upgrade and Configuration Documentation

To perform subsequent upgrades and configurations after login to the device, visit Huawei

enterprise technical support website http://support.huawei.com/enterprise and search for

product documentation by keyword. The search method is described as follows:

lFit AP:

–Upgrade: Search for Fit AP upgrade guide, and refer to the upgrade guide in the

documentation of the correct version.

–Configuration: Search for AC6605 product documentation, and refer to the

configuration guide in the documentation of the correct version.

lFat AP:

–Upgrade: Search for Fat AP upgrade guide, and refer to the upgrade guide in the

documentation of the correct version.

–Configuration: Search for Fat AP product documentation, and refer to the

configuration guide in the documentation of the correct version.

lcloud AP:

–Upgrade: Search for cloud AP upgrade guide, and refer to the upgrade guide in the

documentation of the correct version.

–Online configuration: Search for cloud AP product documentation, and refer to

the configuration guide in the documentation of the correct version.

–Service configuration after APs go online: Search for CloudCampus solution

product documentation, and refer to the deployment guide in the documentation

of the correct version.

3.2 Logging In to the Device Through the Web System

The built-in web system allows you to use a browser to log in to the device. You can

configure, manage, and maintain a Fat AP and cloud AP on the GUI. On the web page, you

are prompted to configure and manage a Fit AP on the AC.

Device connections are classified into wired and wireless connections.

lIn versions earlier than V200R007C20, APs support wired connections.

lIn V200R007C20 and later, Fat APs support both wired and wireless connections, and

Fit APs and cloud APs support wired connections.

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Before logging in to the device, complete the following tasks:

lPower on the device.

lPrepare network cables used to connect device interfaces for wired connections. No

network cable is required for wireless connections.

The following table lists the default configuration of the device. You are advised to change the

default user name and password on your first login.

Table 3-2 Default configuration of the device

Parameter Default Setting

User name admin

Password admin@huawei.com

IP address lWired connection: 169.254.1.1

lWireless connection: 192.168.1.1

Subnet mask lWired connection: 255.255.0.0

lWireless connection: 255.255.255.0

SSID HUAWEI-XXXX, applicable to wireless

connections of Fat APs (XXXX specifies the

last four bits of the AP's MAC address.)

Wireless password None, applicable to wireless connections of

Fat APs

NOTE

For a Fit AP and cloud AP, you can perform the following operations:

lIf the Fit AP in any version is offline or the Fit AP in V200R007C10 or later does not go online, you can

access the device through the offline management VAP for operations. By default, the SSID of the offline

management VAP is hw_manage_xxxx (xxxx specifies the last four bits of the AP's MAC address) and

the password is hw_manage. After the IP address of the PC is set to 169.254.2.x/24 (169.254.2.1

excluded and 169.254.2.100 recommended), the connection is set up, , and you can log in to the AP using

web system for operations.

lIf the cloud AP is offline or does not go online, you can access the device through the offline management

VAP for operations. By default, the SSID of the offline management VAP is hw_manage_xxxx (xxxx

specifies the last four bits of the AP's MAC address) and the password is hw_manage. After the PC

dynamically obtains an IP address and connects to the AP, you can log in to the AP using web system for

operations.

The following example uses the default parameters and is used for reference only.

Wired Connection Mode

Step 1 Use a network cable to connect a PC to any network port of the AP or that of the switch on

the same network segment as the AP.

Step 2 Assign the PC with an IP address on the same network segment as the default IP address of

the device so that the PC and device are reachable to each other.

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If the device uses the default settings, the IP address of the PC must be in the network

segment 169.254.0.0/16 but cannot be 169.254.1.1. 169.254.1.100 is recommended.

Step 3 Open the browser on the PC, enter http://IP address in the address box, and press Enter to

click Login to enter the web system home page.

----End

Wireless Connection Mode

Step 1 By default, STAs search for the WLAN HUAWEI-XXXX within the wireless signal coverage

of a Fat AP. STAs can access the WLAN without entering the password. If the SSID and

password have been configured, use the specified SSID and password to set up a wireless

connection.

Step 2 Open the browser on the STA, enter http://IP address in the address box, and press Enter to

click Login. The web system home page is displayed.

----End

Method of Obtaining Upgrade and Configuration Documentation

To perform subsequent upgrades and configurations after login to the device, visit Huawei

enterprise technical support website http://support.huawei.com/enterprise and search for

product documentation by keyword. The search method is described as follows:

lFit AP:

–Upgrade: Search for Fit AP upgrade guide, and refer to the upgrade guide in the

documentation of the correct version.

–Configuration: Search for AC6605 product documentation, and refer to the

configuration guide in the documentation of the correct version.

lFat AP:

–Upgrade: Search for Fat AP upgrade guide, and refer to the upgrade guide in the

documentation of the correct version.

–Configuration: Search for Fat AP product documentation, and refer to the

configuration guide in the documentation of the correct version.

lcloud AP:

–Upgrade: Search for cloud AP upgrade guide, and refer to the upgrade guide in the

documentation of the correct version.

–Online configuration: Search for cloud AP product documentation, and refer to

the configuration guide in the documentation of the correct version.

–Service configuration after APs go online: Search for CloudCampus solution

product documentation, and refer to the deployment guide in the documentation

of the correct version.

3.3 Logging In to the Device Through the Console Port

Before logging in to the device, complete the following tasks:

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lPower on the device.

lPrepare a console cable.

lPrepare terminal simulation software.

NOTE

If your PC's operating system provides terminal simulation software (like HyperTerminal in Windows 2000/

XP), you do not need to install additional terminal simulation software. If the PC runs on an operating system

without terminal simulation software (like Windows 7), install third-party terminal simulation software on the

PC by referring to the user manual or online help.

Step 1 Use a console cable to connect the PC to the console port of the device.

Step 2 Start terminal emulation software on the PC, create a connection, and set communication

parameters as follows:

lBaud rate (B): 9600

lData bits (D): 8

lParity (P): None

lStop bits (S): 1

lFlow control (F): None

Step 3 Press Enter and enter the authentication information as prompted to log in to the user view.

(The following information is only for reference.)

For a Fit AP, enter the default user name admin and password admin@huawei.com.

You are advised to change the default user name and password on your first login.

Username: admin

Password:

Info: You are advised to change the password to ensure security.

For a Fat AP and Cloud AP, set a passowrd of console, and use the password to log in.

Please configure the login password:

Info: A plain text password is a string of 8 to 16 case-sensitive characters and

must be a combination of at least two of the follow

ing: uppercase letters A to Z, lowercase letters a to z, digits, and special

characters. A cipher text password contains 56 or 68 ch

aracters.

Enter password:

Confirm password:

----End

Method of Obtaining Upgrade and Configuration Documentation

To perform subsequent upgrades and configurations after login to the device, visit Huawei

enterprise technical support website http://support.huawei.com/enterprise and search for

product documentation by keyword. The search method is described as follows:

lFit AP:

–Upgrade: Search for Fit AP upgrade guide, and refer to the upgrade guide in the

documentation of the correct version.

–Configuration: Search for AC6605 product documentation, and refer to the

configuration guide in the documentation of the correct version.

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lFat AP:

–Upgrade: Search for Fat AP upgrade guide, and refer to the upgrade guide in the

documentation of the correct version.

–Configuration: Search for Fat AP product documentation, and refer to the

configuration guide in the documentation of the correct version.

lcloud AP:

–Upgrade: Search for cloud AP upgrade guide, and refer to the upgrade guide in the

documentation of the correct version.

–Online configuration: Search for cloud AP product documentation, and refer to

the configuration guide in the documentation of the correct version.

–Service configuration after APs go online: Search for CloudCampus solution

product documentation, and refer to the deployment guide in the documentation

of the correct version.

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4 Hardware Failures

About This Chapter

This section describes common methods for troubleshooting typical hardware faults.

4.1 A Device Fails to Be Powered On

Fault Description

The SYS indicator of a device is off.

Possible Causes

Power Supply Mode Possible Cause

Power supply using a power module lThe device is powered off.

lThe power cable is not securely

connected to the device.

lThe power supply unit has failed.

–If the device connects to an external

power source, its power adapter may

fail.

–If the device has a built-in power

supply, the device itself may be

faulty.

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Power Supply Mode Possible Cause

PoE power supply lThe power sourcing equipment does not

support the PoE function or is faulty.

lThe power sourcing equipment does not

support the required power supply mode.

lThe power sourcing equipment does not

provide sufficient power.

lThe power sourcing equipment is

incorrectly configured (the PoE function

is disabled or the power-off time range is

improperly set).

lThe line is faulty (the network cable or

distribution frame is damaged).

lThe device is faulty.

Troubleshooting Procedure

Power Supply Mode Troubleshooting Procedure

Power supply using a power module 1. Check whether the device is powered

off.

2. Check that the power cable is securely

connected to the device.

3. Check whether the power supply is

normal.

Replace the power adapter with a normal

one. If the device is powered on, the

original power adapter is faulty. Contact

technical support personnel or Huawei

agent and ask them to replace the power

adapter.

4. If the device still cannot be powered on,

the device itself is faulty. Contact

technical support personnel or Huawei

agent and ask them to replace the device.

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Power Supply Mode Troubleshooting Procedure

PoE power supply 1. Check whether the power sourcing

equipment supports PoE or is faulty.

2. Check whether the power output mode

of the power sourcing equipment is

supported by the powered device.

3. Check whether the power sourcing

equipment can support the maximum

power consumption of the device.

4. Check whether the configuration on the

power sourcing equipment causes PoE

power supply errors, such as the PoE

function is disabled or the power-off

time range is incorrectly set.

5. Check whether the network cable or

distribution frame is faulty.

6. If the device still cannot be powered on,

the device itself is faulty. Contact

technical support personnel or Huawei

agent and ask them to replace the device.

NOTE

The output power of an 802.3af PSE port is 15.4 W, that of an 802.3at PSE port is 30 W, and that of an

802.3bt PSE port is 60 W.

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5 Appendix

About This Chapter

5.1 On-site Cable Assembly and Installation

5.2 Environmental Requirements for Device Operation

5.3 Equipment Grounding Specifications

5.4 Engineering Labels for Cables

5.5 Guide to Using Optical Modules

5.6 Fault Tag

5.7 Installation Checklist

5.8 Guide to Making Drip Loops

5.9 Power Adaptation Solution

5.1 On-site Cable Assembly and Installation

5.1.1 Cable Assembly Precautions

Checking the Appearance of Cables

lIf the cable jacket or insulation is visibly dirty, clean it before assembly.

lIf the jacket or insulation of a cable has visible damage, irreparable scuffing, or other

defects, do not use the cable.

lIf the shield layer of a cable is damaged, do not use the cable.

lIf the cable jacket or insulation cracks after the cable is bent or twisted, discard this cable

and check whether other cables have the same problem. If other cables have the same

problem, replace these cables.

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Checking the Appearance of Connectors

lDo not use connectors with visible defects, damage, rust or scuffing.

lDo not use connectors if their shells or pins have exposed part or uneven plating, or their

pins are lost, broken, or bent.

lDo not use connectors that have dirt on their pins or in their jacks or if there are

conductors between pins or between pins and the shell.

Precautions for Assembly

lUse dedicated tools or tools delivered by Huawei and follow the methods given here

during assembly.

lHold terminals of cables instead of pulling the cables themselves when installing or

removing cable components.

lTake the following precautions when cutting or stripping cables:

–Make cables slightly longer than necessary.

–Coil cables longer than 2 m (6.56 ft) after cutting. Bind and fasten the coils using

bundling ropes. The inner diameters of the coils should be larger than 20 times the

outer diameters of the cables.

–When stripping the jackets of cables, avoid damaging the shield layers (braid or

aluminum foil), insulation, core conductors, and other jackets that do not need to be

stripped.

–After assembling cables, cut all visible cross sections of jackets to ensure that the

cross sections are arranged neatly.

–Do not touch the core conductors of cables with your hands. Terminate exposed

conductors in a timely way after stripping off insulation so that the surface of the

conductors does not become oxidized.

lTake the following precautions when crimping and connecting cables or connectors:

–The terminals and conductors should be connected tightly after they are crimped.

They should not be moved or turned.

–Cut all the exposed copper wires.

–Try to avoid a second crimping of sleeves.

–Keep all the conductors clean and aligned.

NOTE

The connectors, cables, and tools provided by different vendors may be different. The figures in this

document are for your reference only.

5.1.2 Assembling Power Cables

5.1.2.1 Assembling a DC 2-Pin Round Connector (A)

Context

Figure 5-1 shows the components of DC 2-PIN round connector A.

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Figure 5-1 Components of DC 2-pin round connector A

1. Enclosure 2. Shield circle 3. Clip 4. Socket 5. Nut

Procedure

Step 1 Bind a cable tie, separate the socket and nut, and install them on the cable, as shown in Figure

5-2.

Figure 5-2 Installing the nut on the cable

Step 2 Strip the cable as shown in Figure 5-3.

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Figure 5-3 Stripping the cable

Step 3 Open the clip and correctly insert the core wires to the negative and positive holes, as shown

in Figure 5-4.

Figure 5-4 Inserting core wires

Step 4 Use a Phillips screwdriver to tighten the crimping screw in "+" hole, rotate the connector by

180 degree, and tighten the crimping screw in "-" hole, as shown in Figure 5-5.

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Figure 5-5 Tightening the crimping screws

Step 5 Close the clip and tighten the screw to compact the shield layer, as shown in Figure 5-6.

Figure 5-6 Compacting the shield layer

Step 6 Pre-tighten the socket and enclosure and use the Phillips screwdriver to tighten the socket

with the tightening torque no less than 1.2 N•m, as shown in Figure 5-7.

Figure 5-7 Tightening the socket

Step 7 Pre-tighten the socket and nut and use the Phillips screwdriver to tighten the nut with the

tightening torque no less than 1.2 N•m, as shown in Figure 5-8.

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Figure 5-8 Tightening the nut

Step 8 Use a multimeter to check the connectivity of the 2-pin round connector's cable components,

as shown in Figure 5-9.

Figure 5-9 Checking connectivity

The connectivity meets standards if the following conditions are met:

lPositive and negative holes of the connector are not short-circuited.

lThe metal enclosure and connector's holes are not short-circuited.

lThe cable shield layer is properly connected to the metal enclosure.

lCore wires are properly connected to the connector's holes.

Step 9 If devices are installed outdoor, wrap three layers of PVC insulation tape around the

connector for protection, as shown in Figure 5-10.

NOTICE

Ensure that proper quantity of the PVC insulation tape is used for wrapping the connector,

facilitating the connector uninstallation in later maintenance.

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Figure 5-10 Wrapping PVC insulation tape

----End

5.1.2.2 Assembling a DC 2-Pin Round Connector (B)

This topic describes how to assemble a DC 2-pin round connector (B) and key operations.

Context

Table 5-1 lists power cables connected to the active antenna unit (AAU).

Table 5-1 AAU power cable

AAU Side Cable Commonly-Used

Colors

Colors Used in

Britain

DC round

waterproof

connector

RTN (+) Black or brown Blue

NEG (-) Blue Gray

NOTE

The color and appearance of cables in this topic are for reference only. The cable color and appearance

vary depending on countries and regions.

Figure 5-11 shows components of the DC round waterproof connector.

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Figure 5-11 Components of the DC round waterproof connector

1. Enclosure 2. Socket 3-1. Clamping jaw 1 3-2. Clamping jaw 2 4. Nut

Procedure

Step 1 Determine the diameter of the cable to be installed. If the diameter is larger than 14 mm,

replace the clamping jaw, as shown in Figure 5-12. During the replacement, connect the

clamping jaw boss to the groove inside the socket and ensure that the clamping jaw is

completely installed in the socket, as shown in Figure 5-13.

NOTE

lPower cables supported by clamping jaw 1: 2 x 12 AWG, 2 x 4 mm2, and 2 x 6 mm2

lPower cables supported by clamping jaw 2: 2 x 8 AWG and 2 x 10 mm2

Figure 5-12 Replacing clamping jaws

1. Clamping jaw 1 2. Clamping jaw 2

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Figure 5-13 Correct operation for replacing a clamping jaw

1. Groove 2. Boss

Step 2 Reserve the cable length at the assembly end, bind the plastic cable tie, install the nut,

clamping jaw, and socket on the cable and pre-tighten them, as shown in Figure 5-14.

Figure 5-14 Pre-tightening

1. Cable 2. Plastic cable tie

Step 3 Use the stripping ruler card to measure required lengths, strip the outer jacket (48 mm) on the

head of the cable to be connected and the outer jacket (17 mm) of each core wire, twist the

shield layers into one strand, as shown in Figure 5-15.

NOTICE

lThe stripping ruler card is delivered with the components of the connector.

lCut the padding using diagonal pliers.

lGently strip the insulation sheath to avoid damage to the conductor metal.

lEnsure that the edge of core wires is not split.

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Figure 5-15 Stripping the cable

1. Shield layer

Step 4 Connect the cable NEG (-) (gray in Britain and blue in other countries) to - end of the

connector and cable RTN (+) (blue in Britain and black/brown in other countries) to + end of

the connector. Tighten two crimping screws using the Phillips screwdriver and compact the

cable with tightening torque 1.4 N•m, as shown in Figure 5-16.

Figure 5-16 Tightening the crimping screws

Step 5 After the cables are assembled, pull the cables slightly to check whether the connections are

secure. If the cable slides outward or the wire of the cable is exposed outside the hole for the

cable, remove the cable, cut the split wires, and then strip the jacket and install the cable

again.

Step 6 Twist the shield layers into one strand and insert it into the shield slot, tighten the tail screw,

and fasten the shielded layer with tightening torque 1.4 N•m, as shown in Figure 5-17.

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Figure 5-17 Compacting the shield layer

1. Shield layer

NOTE

Cut the extra shield layer using the diagonal pliers.

Step 7 Tighten the socket and enclosure until the red line on the socket is invisible, as shown in

Figure 5-18.

Figure 5-18 Tightening the socket and enclosure

Step 8 Pre-tighten the nut and socket and further tighten the nut using a torque wrench (opening

width: 28 mm), as shown in Figure 5-19.

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Figure 5-19 Tightening the nut

Step 9 Use a multimeter to check the reliability of cable components, as shown in Figure 5-20.

Figure 5-20 Checking reliability

NOTICE

lEnsure that the short circuit does not occur between the positive and negative holes of

the connector.

lEnsure that the short circuit does not occur between the metal enclosure and connector's

positive and negative holes.

Step 10 If devices are installed outdoor, wrap three layers of PVC insulation tape around the

connector for protection, as shown in Figure 5-21.

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Figure 5-21 Wrapping PVC insulation tape

NOTICE

Ensure that proper quantity of the PVC insulation tape is used for wrapping the connector,

facilitating the connector uninstallation in later maintenance.

----End

5.1.2.3 Assembling the OT Terminal and Power Cable

Context

Figure 5-22 shows the components of an OT terminal and a power cable.

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Figure 5-22 Components of an OT terminal and a power cable

A. Heat-shrinkable tubing B. Bare crimping terminal C. Insulation D. Conductor

Procedure

Step 1 Based on the cross-sectional area of the cable conductor, strip a length of insulation coating C

to expose the conductor D of length L1, as shown in Figure 5-23. The recommended values

of L1 are listed in Table 5-2.

Figure 5-23 Stripping a power cable (OT terminal)

NOTICE

lWhen you strip a power cable, do not damage the conductor of the cable.

lIf the bare crimping terminal is not provided by Huawei, the value of L1 is 1 mm (0.04 in.)

to 2 mm (0.08 in.) greater than the value of L.

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Table 5-2 Mapping between the cross-sectional area of the conductor and the value of L1

Cross-

Sectional

Area of

Conductor

(mm2(in.2))

Value of L1

(mm(in.))

Cross-Sectional

Area of Conductor

(mm2(in.2))

Value of L1

(mm(in.))

1 (0.002) 7 (0.28) 10 (0.015) 11 (0.43)

1.5 (0.002) 7 (0.28) 16 (0.025) 13 (0.51)

2.5 (0.004) 7 (0.28) 25 (0.039) 14 (0.55)

4 (0.006) 8 (0.31) 35 (0.054) 16 (0.63)

6 (0.009) 9 (0.35) 50 (0.077) 16 (0.63)

NOTE

If you are proficient in assembling OT terminals and power cables, you can obtain the value of L1 by

comparing the part to be crimped with the power cable.

Step 2 Put the heat-shrinkable (A) tubing onto the bare crimping terminal, as shown in Figure 5-24.

Figure 5-24 Putting the heat shrink tubing onto the bare crimping terminal

Step 3 Put the OT terminal B onto the exposed conductor, and ensure that the OT terminal is in good

contact with the insulation coating C, as shown in Figure 5-24.

NOTICE

After the conductor is fed into the OT terminal, the protruding part of the conductor, or L2 in

Figure 5-24, must not be longer than 2 mm (0.08 in.).

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Step 4 Crimp the joint parts of the bare crimping terminal and the conductor, as shown in Figure

5-25.

NOTE

The shapes of crimped parts may vary with the crimping dies.

Figure 5-25 Crimping the joint parts of the bare crimping terminal and the conductor (OT

terminal)

Step 5 Push the heat shrink tubing (A) toward the connector until the tube covers the crimped part,

and then use a heat gun to heat the tube, as shown in Figure 5-26.

Figure 5-26 Heating the heat shrink tubing (OT terminal)

NOTICE

Stop heating the shrink tubing when the connector is securely locked in the shrink tubing. Do

not heat the shrink tubing too long as this may damage the insulation coating.

----End

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5.1.2.4 Assembling the JG Terminal and Power Cable

Context

Figure 5-27 shows the components of a JG terminal and a power cable.

Figure 5-27 Components of a JG terminal and a power cable

A. JG terminal B. Heat-shrinkable tubing C. Insulation layer of a power

cable

D. Conductor of a power cable

Procedure

Step 1 Strip a part of the insulation to expose the cable conductor with a length of L, as shown in

Figure 5-28. The recommended values of L are listed in Table 5-3.

NOTICE

lWhen you strip a power cable, do not damage the conductor of the cable.

lIf the bare crimping terminal is not provided by Huawei, you can adjust the value of L as

required.

Figure 5-28 Stripping a power cable (JG terminal)

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Table 5-3 Mapping between the cross-sectional area of the conductor and the value of L

Cross-Sectional Area of Conductor

(mm2(in.2))

Value of L (mm(in.))

16 (0.025) 13 (0.51)

25 (0.039) 14 (0.55)

35 (0.054) 16 (0.63)

50 (0.077) 16 (0.63)

Step 2 Put the heat shrink tubing onto the bare crimping terminal, as shown in Figure 5-29.

Figure 5-29 Putting the heat shrink tubing onto the bare crimping terminal

Step 3 Put the bare crimping terminal onto the exposed conductor, and ensure that the bare crimping

terminal is in good contact with the insulation of the power cable, as shown in Figure 5-29.

Step 4 Crimp the joint parts of the bare crimping terminal and the conductor, as shown in Figure

5-30.

Figure 5-30 Crimping the joint parts of the bare crimping terminal and the conductor (JG

terminal)

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Step 5 Push the heat shrink tubing toward the connector until the tube covers the crimped part, and

then use a heat gun to heat the tube, as shown in Figure 5-31.

Figure 5-31 Heating the heat shrink tubing (JG terminal)

----End

5.1.2.5 Assembling the Cord End Terminal and the Power Cable

Context

Figure 5-32 shows the components of a cord end terminal and a power cable.

Figure 5-32 Components of a cord end terminal and a power cable

A. Cord end terminal B. Insulation layer of a power cable C. Conductor of a power cable

Procedure

Step 1 Strip a part of the insulation to expose the cable conductor with a length of L1, as shown in

Figure 5-33. The recommended values of L1 are listed in Table 5-4.

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NOTICE

When you strip a power cable, do not damage the conductor of the cable.

Figure 5-33 Stripping a power cable (cord end terminal)

Table 5-4 Mapping between the cross-sectional area of the conductor and the value of L1

Cross-

Sectional

Area of

Conductor

(mm2(in.2))

Value of L1

(mm(in.))

Cross-Sectional

Area of Conductor

(mm2(in.2))

Value of L1

(mm(in.))

1 (0.002) 8 (0.31) 10 (0.015) 15 (0.59)

1.5 (0.002) 10 (0.39) 16 (0.025) 15 (0.59)

2.5 (0.004) 10 (0.39) 25 (0.039) 18 (0.71)

4 (0.006) 12 (0.47) 35 (0.054) 19 (0.75)

6 (0.009) 14 (0.55) 50 (0.077) 26 (1.02)

Step 2 Put the cord end terminal onto the conductor, and ensure that the conductor is aligned with the

edge of the cord end terminal, as shown in Figure 5-34.

NOTICE

After the conductor is fed into the cord end terminal, the protruding part of the conductor

must not be longer than 1 mm (0.04 in.).

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Figure 5-34 Putting the cord end terminal onto the conductor

Step 3 Crimp the joint parts of the cord end terminal and the conductor, as shown in Figure 5-35.

Figure 5-35 Crimping the cord end terminal and the conductor

Step 4 Check the maximum width of the tubular crimped terminal. The maximum width of a tubular

crimped terminal is listed in Table 5-5.

Table 5-5 Maximum width of a tubular crimped terminal

Cross-Sectional Area of Tubular

Terminal (mm2(in.2))

Maximum Width of Crimped Terminal

W1 (mm(in.))

0.25 (0.0004) 1 (0.04)

0.5 (0.0008) 1 (0.04)

1.0 (0.0015) 1.5 (0.06)

1.5 (0.0023) 1.5 (0.06)

2.5 (0.0039) 2.4 (0.09)

4 (0.006) 3.1 (0.12)

6 (0.009) 4 (0.16)

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Cross-Sectional Area of Tubular

Terminal (mm2(in.2))

Maximum Width of Crimped Terminal

W1 (mm(in.))

10 (0.015) 5.3 (0.21)

16 (0.025) 6 (0.24)

25 (0.039) 8.7 (0.34)

35 (0.054) 10 (0.39)

----End

5.1.3 Assembling Ethernet Cables

5.1.3.1 Assembling the Shielded RJ45 Connector and Ethernet Cable

Context

Figure 5-36 shows the components of an RJ45 connector and a shielded Ethernet cable.

Figure 5-36 Shielded RJ45 connector and cable

A. Jacket of connector B. Metal shell of connector C. Wire holder of

connector

D. Plug of connector

E. Jacket of Ethernet cable F. Shield layer of Ethernet

cable

G. Twisted-pair wires -

Procedure

Step 1 Fit the jacket of the connector onto the Ethernet cable, as shown in Figure 5-37.

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Figure 5-37 Fitting the jacket of the connector onto the Ethernet cable

Step 2 Remove a 30 mm (1.18 in.) long section of the jacket, cut off the nylon twine inside the

jacket, and cut a no more than 5 mm (0.20 in.) cleft in the jacket, as shown in Figure 5-38.

NOTICE

lWhen you remove a section of the jacket, do not damage the shield layer of the twisted-

pair cable.

lWhen you remove the shield layer, do not damage the insulation of the twisted-pair cable.

Figure 5-38 Removing the jacket of a twisted-pair cable (unit: mm (in.))

Step 3 Fit the metal shell onto the twisted-pair cable. The shield layer is covered by the metal shell,

as shown in Figure 5-39.

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Figure 5-39 Fitting the metal shell onto the twisted-pair cable

Step 4 Fit the metal shell onto the twisted-pair cable until the shield layer is covered completely.

Along the edge of the metal shell, cut off the aluminum foil shield layer and ensure that there

is no surplus copper wire. The exposed twisted-pair cable is about 20 mm (0.79 in.) long, as

shown in Figure 5-40.

Figure 5-40 Removing the shield layer of a twisted-pair cable (unit: mm (in.))

Step 5 Lead the four pairs of twisted-pair wires through the wire holder, as shown in Figure 5-41 and

Figure 5-42. Ensure that the colored wires are in the correct location in the cable.

Figure 5-41 Leading wires through the wire holder

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Figure 5-42 Cable locations in a wire holder

White-Green

Green

White-Orange

Orange

Blue

White-Blue

White-Brown

Brown

Step 6 Align the four pairs of cables in the holder, as shown in Figure 5-43. The connections

between the wires and the pins are shown in Figure 5-44 and listed in Table 5-6.

Figure 5-43 Four pairs of cables on a wire holder

Figure 5-44 Connections between wires and pins

Brown

White -Brown

Green

White-Blue

Blue

White-Green

Orange

White-Orange

Pin 8

Pin 1

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Table 5-6 Connections between wires and pins (using a straight-through cable as an example)

Matching Pins of Wires Wire Color

1 White-Orange

2 Orange

3 White-Green

4 Blue

5 White-Blue

6 Green

7 White-Brown

8 Brown

Step 7 Cut off the surplus cables along the lower edge of the wire holder, as shown in Figure 5-45.

Figure 5-45 Cutting off surplus cables

Step 8 Put the connector body onto the wire holder and turn the metal shell by 90°, as shown in

Figure 5-46.

NOTE

Ensure that the wire holder is in good contact with the connector body.

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Figure 5-46 Putting the connector body onto the wire holder

Step 9 Push the metal shell toward the connector body until the wire holder and the connector body

are engaged completely. Crimp the connector, as shown in Figure 5-47.

Figure 5-47 Crimping the connector

Step 10 Push the jacket towards the metal shell until the metal shell is covered. This completes the

assembly of one end of the cable, as shown in Figure 5-48.

Figure 5-48 Pushing the metal shell

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Step 11 To complete the assembly of the other end, repeat steps 1 to 10.

----End

5.1.3.2 Assembling an Optimized Shielded RJ45 Connector and SFTP Network

Cables

Context

This topic describes how to assemble an optimized shielded RJ45 connector with a Secure

File Transfer Protocol (SFTP) straight-through network cable as an example. The connector

has a cable support rack but does not have a metal jacket. Such a connector can be used for

crimping CAT. 6 network cables.

Figure 5-49 shows the shielded RJ45 connector.

Figure 5-49 Shielded RJ45 connector

1: Core

wires

2: Aluminum foil 3: Braid

shield

4: Outer

jacket

5: RJ45

connector

6: Load bar 7: Cable support

rack

Procedure

Step 1 Strip 20 mm outer jacket off the network cable, peel off the braid shield backward, and cut off

the aluminum foil and protection band, as shown in Figure 5-50.

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NOTICE

Ensure that the shielded layer is intact when stripping outer jackets off the network cable.

Keep the cable insulation intact when stripping the shielded layer.

Figure 5-50 Stripping the cable

Step 2 Arrange core wires in the order of colors shown in Figure 5-51 and fix the cable support rack

to the bottom of the core wires.

Figure 5-51 Core wire order

Step 3 Hold the arranged core wires and route them through the load bar, as shown in Figure 5-52.

Table 5-7 shows the mapping between the core wires and pins of the connector.

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Figure 5-52 Routing the core wires through the load bar

Table 5-7 Mapping between core wires and pins

Pin ID Core Wire Color

1 White-orange

2 Orange

3 White-green

4 Blue

5 White-blue

6 Green

7 White-brown

8 Brown

Step 4 After routing core wires through the load bar, move the load bar to the bottom to connect to

the cable support rack, and neatly cut the edge cables, as shown in Figure 5-53.

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Figure 5-53 Neatly cutting edge cables

Step 5 Insert the load bar into the RJ45 connector, as shown in Figure 5-54.

Figure 5-54 Inserting the load bar into the RJ45 connector

NOTICE

Cables must be inserted into the bottom of the connector, which can be checked on the side or

front end face of the connector.

Step 6 Use the crimping tool to crimp the connector, as shown in Figure 5-55. Use cutting pliers to

neatly cut braid shields exposed out of the connector along the load bar, as shown in Figure

5-56.

Figure 5-55 Crimping the connector

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Figure 5-56 Neatly cutting braid shields

Step 7 Repeat Step 1 through Step 6 to assemble the optimized shielded RJ45 connector on the other

end of the network cable.

----End

5.1.3.3 Assembling an Integrated Shielded RJ45 Connector and SFTP Network

Cables

Context

This topic describes how to assemble an integrated shielded RJ45 connector with a Secure

File Transfer Protocol (SFTP) straight-through network cable as an example. The connector

does not have a cable support rack or metal jacket.

Figure 5-57 shows the integrated shielded RJ45 connector.

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Figure 5-57 Shielded RJ45 connector

1: Core wires 2: Aluminum foil 3: Braid shield 4: Outer jacket 5: RJ45 connector

Procedure

Step 1 Strip 20 mm outer jacket off the network cable, peel off the braid shield backward, and cut off

the aluminum foil and protection band, as shown in Figure 5-58.

NOTICE

Ensure that the shielded layer is intact when stripping outer jackets off the network cable.

Keep the cable insulation intact when stripping the shielded layer.

Figure 5-58 Stripping the cable

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Step 2 Arrange the twisted pair wires in the order of colors shown in Table 5-8 and cut the wire ends

neatly with 12 mm core wires left, as shown in Figure 5-59.

Figure 5-59 Core wire order

Table 5-8 Mapping between core wires and pins

Pin ID Core Wire Color

1 White-orange

2 Orange

3 White-green

4 Blue

5 White-blue

6 Green

7 White-brown

8 Brown

Step 3 Route the arranged core wires through the RJ45 connector, as shown in Figure 5-60.

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Figure 5-60 Routing core wires through the connector

Step 4 Use the crimping tool to crimp the connector, as shown in Figure 5-61.

Figure 5-61 Crimping the connector

Step 5 Neatly cut braid shields exposed out of the connector along the load bar, as shown in Figure

5-62.

Figure 5-62 Neatly cutting braid shields

Step 6 Repeat Step 1 through Step 5 to assemble the integrated shielded RJ45 connector on the other

end of the network cable.

----End

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5.1.3.4 Assembling a Shielded RJ45 Connector and an FTP Network Cable

Context

This topic describes how to assemble a shielded RJ45 connector and File Transfer Protocol

(FTP) network cable and related notes.

Figure 5-64 shows the shielded RJ45 connector.

Figure 5-63 Connector jacket

Figure 5-64 Shielded RJ45 connector

Figure 5-65 Cable

A: Connector

jacket

B: Connector C: Core wires of the

twisted pair

D: Aluminum foil used as the

network cable shield

E: Network cable

jacket

Procedure

Step 1 Route the network cable through the connector jacket, as shown in Figure 5-66.

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Figure 5-66 Routing the network cable through the connector jacket

Step 2 Strip 20 mm outer jacket off the cable and cut off the nylon layer inside the jacket, as shown

in Figure 5-67.

NOTICE

Ensure that the aluminum foil used as a shielded layer is intact when stripping outer jackets

off the twisted pair cable.

Figure 5-67 Stripping the outer jacket

Step 3 Pull outward the shielded aluminum foil and cut off the PET membrane and ground cables

along the end face of the outer jacket, as shown in Figure 5-68.

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Figure 5-68 Cutting off the PET membrane and ground cables

Step 4 Arrange the twisted core wires according to color order shown in Figure 5-69. Use cutting

pliers to neatly cut the front end of the twisted pair, as shown in Figure 5-70. Figure 5-71

shows pin arrangement of each contact of the connector.

Figure 5-69 Mapping between colors and pins

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Figure 5-70 Neatly cutting the twisted pair

Figure 5-71 Pin arrangement of the connector

Pin8

Pin1

Step 5 Insert the arranged four twisted pair cables into the connector, as shown in Figure 5-72.

NOTICE

lCables must be inserted into the bottom.

lThe aluminum foil must keep intact after cables are inserted into the connector.

Figure 5-72 Inserting cables into the connector

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Step 6 Use the crimping tool dedicated for FTP network cables to crimp the connector and neatly cut

the aluminum foil along the end face of the connector, as shown in Figure 5-73.

Figure 5-73 Crimping the connector

Step 7 Move the connector jacket to the connector body to wrap the connector shell, as shown in

Figure 5-74.

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Figure 5-74 Wrapping the connector shell

Step 8 Repeat Step 1 through Step 7 to assemble the shielded RJ45 connector on the other end of the

network cable.

----End

5.1.3.5 Assembling an Unshielded RJ45 Connector and Ethernet Cable

Context

Figure 5-75 shows the components of an unshielded RJ45 connector and cable.

Figure 5-75 Components of an unshielded RJ45 connector and cable

A. Plug of connector B. Jacket C. Twisted-pair wires

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Procedure

Step 1 Remove a 16-mm (0.63 in.) long section of the jacket, as shown in Figure 5-76.

NOTICE

When you remove the shield layer, do not damage the insulation of the twisted-pair cable.

Figure 5-76 Removing the jacket of a twisted-pair cable (unit: mm (in.))

Step 2 Align the four pairs of wires and cut the ends neatly, as shown in Figure 5-77. The

connections between the wires and the pins are listed in Table 5-9.

Figure 5-77 Connections between wires and pins (unit: mm (in.))

White-Orange

White-Green

Orange

Blue

White-Blue

Green

White-Brown

Brown

Pin 8

Pin 1

Table 5-9 Connections between wires and pins (using a straight-through cable as an example)

Matching Pins of Wires Wire Color

1 White-Orange

2 Orange

3 White-Green

4 Blue

5 White-Blue

6 Green

7 White-Brown

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Matching Pins of Wires Wire Color

8 Brown

Step 3 Feed the cable into the plug, and crimp the connector, as shown in Figure 5-78.

NOTE

When inserting the cable, check from the side or bore of the plug to ensure that the cable is completely

seated in the plug.

Figure 5-78 Crimping the connector

Step 4 To complete the assembly of the other end, repeat steps 1 to 3.

----End

5.1.3.6 Checking the Appearance of Contact Strips

Context

lTo ensure proper contact between the crimped wires and the wire conductors, the heights

and sizes of the contact strips must be standard and the same.

lThe contact strips must be parallel to each other, with an offset of less than ± 5°. The top

margin of a strip must be parallel to the axis of the connector, with an offset of less than

± 10°.

lTo ensure conductivity, the surface of the contact strips must be clean.

lThe contact strips must be in good contact with the RJ45 socket. The plastic separators

must remain intact and be aligned.

lThe contact strip blade must extend beyond the ends of the wires. The ends of the wires

must be in contact with the edge of the RJ45. The distance between them must be less

than 0.5 mm (0.02 in.).

Procedure

Step 1 Hold the crimped connector, with the front side facing you, and check whether the contact

strips are of the same height. The height should be 6.02 ± 0.13 mm (0.237 ± 0.005). If a

measuring tool is not available, you can compare the connector with a standard connector.

Figure 5-79 shows an unqualified piece, and Figure 5-80 shows a qualified piece.

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NOTE

All unqualified pieces must be crimped again.

Figure 5-79 Contact strips of different heights

Figure 5-80 Contact strips of the same height

Step 2 Hold an RJ45 connector and turn it 45°. Observe the top edges of the metal contact strips.

Figure 5-81 shows an unqualified piece.

Figure 5-81 Unparallel contact strips of different heights

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Step 3 Check whether the contact strips are clean. If they are not clean and the dirt cannot be

removed, replace it with a new RJ45 connector. Figure 5-82 shows an unqualified piece.

Figure 5-82 Dirt on a contract strip

Step 4 Check whether the contact strips and the plastic separators are well aligned and intact. If a

separator is skewed and cannot be fixed, replace it with a new RJ45 connector. Figure 5-83

shows an unqualified piece.

Figure 5-83 Skewed plastic separators

Step 5 Hold the connector with the side facing towards you, and check whether you can see the

cross-sections of the wires. Ensure that the ends of the wires are in good contact with the edge

of the RJ45, and that the contact strip blade extends beyond the ends of the wires and is

crimped with the wires. If not, replace the connector. Figure 5-84 shows an unqualified piece.

Figure 5-84 Wires not in good contact with the edge of the RJ45

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5.1.3.7 Testing the Connection of Assembled Cables

Context

Huawei provides two types of Ethernet cables: straight-through cables and crossover cables.

lStraight-through cables are connected in a one-to-one manner. They are used to connect

terminals such as a computer or switch to network devices. Table 5-10 lists the

connections of core wires in a straight-through cable.

Table 5-10 Connections of core wires in a straight-through cable

RJ45 Connector 1 RJ45 Connector 2 Core Wire Color Twisted or Not

2 2 Orange Twisted

1 1 Orange-White

6 6 Green Twisted

3 3 Green-White

4 4 Blue Twisted

5 5 Blue-White

8 8 Brown Twisted

7 7 Brown-White

lCrossover cables are connected in a crossover manner. They are used to connect

terminals such as two computers or switches. Table 5-11 lists the connections of core

wires in a crossover cable.

Table 5-11 Connections of core wires in a straight crossover cable

RJ45 Connector 1 RJ45 Connector 2 Core Wire Color Twisted or Not

6 2 Orange Twisted

3 1 Orange-White

2 6 Green Twisted

1 3 Green-White

4 4 Blue Twisted

5 5 Blue-White

8 8 Brown Twisted

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RJ45 Connector 1 RJ45 Connector 2 Core Wire Color Twisted or Not

7 7 Brown-White

Figure 5-85 shows the pins of an RJ45 connector.

Figure 5-85 Pins of an RJ45 connector

Pin8

Pin1

Procedure

Step 1 Feed both connectors of the cable into the ports of the cable tester.

Step 2 After the connectors are properly inserted, turn on the tester. If the indicators from 1 to G turn

on simultaneously, you can infer that the pins work normally and the wires are correctly

connected.

NOTE

Turn the switch to the S position to slow down lighting of the indicators so that you can see the

indicators more clearly, as shown in Figure 5-86.

Figure 5-86 Testing the conduction and connections of wires

Step 3 Gently shake the connector and repeat Step 2 to check whether the metal contact strips are in

good contact with the core wires and Ethernet ports, as shown in Figure 5-87.

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Figure 5-87 Checking the reliability

The procedure for testing a crossover cable is the same as that for testing a straight-through

cable except for the sequence in which the indicators turn on, which depends on the wire

connections of a crossover cable.

The Ethernet cable is qualified if the indicators turn on in the following sequence:

At the master (left) section of the tester, the indicators turn on in the sequence of 1-8-G. At the

slave (right) section of the tester, the indicators turn on in the sequence of 3-6-1-4-5-2-7-8-G.

If the indicators do not come on in this sequence, the Ethernet cable is unqualified.

NOTE

If a tester is not available, you can use a multimeter to perform a simple test, as shown in Figure 5-88.

Figure 5-88 Testing the connection of an Ethernet cable

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5.1.3.8 Common Network Cable Faults and Preventive Measures

Table 5-12 lists common network cable faults and preventive measures.

Table 5-12 Common network cable faults and preventive measures

Symptom Cause Preventive Measure

lThe device cannot be

powered using PoE.

lThe device restarts

frequently.

lA large number of error

packets exist on the

device or services are

interrupted.

A network cable has high

resistance or is too long.

Before using network cables

purchased from other

suppliers, use a multimeter

or other tools to measure

cable resistance. Replace the

network cables if their

resistance does not conform

to PoE standard

requirements for network

cable quality.

Non-standard network cable

connectors cause poor

contact with device

interfaces.

Before making a network

cable, use a standard go-no

go gauge to test the

connectors purchased from

other suppliers. Replace the

connectors if they do not

comply with the standard.

Wires in a network cable are

connected to wrong pins.

After a network cable is

made, use a conduction

tester to measure cable

connectivity. For test details,

see 5.1.3.7 Testing the

Connection of Assembled

Cables.

A network cable connector

is not crimped securely,

causing poor contact

between the network cable

and pins in the connector.

When testing a network

cable with a conduction

tester, gently shake the cable

connector and check

whether indicators on the

conduction tester are in

normal state. If indicators 1

to G turn on in a wrong

sequence, remake the

network cable.

The following methods are often used to test network cable resistance, and the test criteria are

listed in Table 5-13:

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lUse a network cable tester (high-end cable tester of Fluke) to measure network cable

resistance.

lConnect multimeter probes to two ends of each wire in a network cable and check the

resistance value on the multimeter.

lConnect a network cable to an AP. Use a multimeter to test the resistance between pins 1

and 2 (or between pins 3 and 6, 4 and 5, or 7 and 8) on the other end of the cable. The

cable's DC resistance approximately equals a half of the displayed value.

Table 5-13 PoE standard requirements for network cable quality

Standard Total

Resistance of

a Network

Cable

802.3af ≤ 20 ohms

802.3at Maximum PD power consumption <

12.95 W

≤ 20 ohms

Maximum PD power consumption <

25.5 W

≤ 12.5 ohms

If an AP is connected to a switch or AC (excluding ACU2), you can run the virtual-cable-

test command on the switch or AC to check network cable connectivity. For details, see the

virtual-cable-test command in the command reference.

5.1.4 Assembling Feeders

5.1.4.1 Assembling the Straight Male Coaxial N Connector and the 1/2'' Feeder

Context

Figure 5-89 shows the components of an N coaxial connector and a 1/2" feeder cable.

Figure 5-89 Components of an N coaxial connector and a 1/2" feeder cable

A. Body of connector B. Back shell of connector C. O-ring seal D. Heat-shrink tubing

E. Cable jacket F. Outer conductor of feeder

cable

G. Inner conductor of

feeder cable

H. Insulation layer of

feeder cable

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Procedure

Step 1 Cut the feeder cable, as shown in Figure 5-90.

Figure 5-90 Cutting a feeder cable (unit: mm)

NOTICE

lEnsure that the feeder cable is cut with reference to the guide in the package box of the

connector.

lAfter you cut the feeder cable, ensure that the cross-section of the outer conductor is

smooth, intact, and round.

lEnsure that the feeder cable is cut at the wave crest of the outer conductor.

lThe inner conductor must be beveled, as shown in Figure 5-90.

Step 2 Use a brush to remove the dirt on the cross-section of the feeder cable.

Step 3 Feed the feeder cable into the heat-shrink tubing, and cover the outer conductor of the feeder

cable with the O-ring seal, as shown in Figure 5-91.

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Figure 5-91 Installing the heat-shrink tubing and the O-ring seal

Step 4 Put the back shell of the connector onto the feeder cable. Tighten the back shell to the end of

the feeder cable, as shown in Figure 5-92.

Figure 5-92 Putting the back shell of the connector onto the feeder cable

Step 5 Mount the body of the connector onto the feeder cable so that the inner conductors of the

connector and feeder cable are connected. Use a spanner (27 N•m to 30 N•m torque

recommended) to fasten the body and back shell, as shown in Figure 5-93.

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Figure 5-93 Fastening the body and back shell

Step 6 Push the heat-shrink tubing towards the connector, as shown in Figure 5-94. Then, heat the

tube.

Figure 5-94 Assembled N connector

Step 7 After the components are assembled, install the connector, as shown in Figure 5-95.

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Figure 5-95 Installing the connector

----End

5.1.4.2 Assembling a Straight Male Coaxial N Connector and an RG8U Feeder

Context

Figure 5-96 shows the coaxial N connector and RG8U feeder.

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Figure 5-96 Coaxial N connector and RG8U feeder

A: Connector body B: Lining C: Clip D: Nut

E: Cable jacket F: Shielded layer of the

feeder

G: Aluminum foil of the

feeder

H: Insulation medium of

the feeder

I: Internal conductor of the

feeder

- - -

Procedure

Step 1 Strip the feeder with the length shown in Figure 5-97.

NOTICE

Ensure that the shielded layer F is intact after the stripping.

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Figure 5-97 Stripping the feeder

Step 2 Route the Cable jacket (E) through the nut (D), as shown in Figure 5-98.

Figure 5-98 Installing the nut

Step 3 Install the clip (C) on the Cable jacket (E) and move the clip until the clip is close to the Cable

jacket, as shown in Figure 5-99.

Figure 5-99 Installing the clip

Step 4 Peel off the shielded layer (F) to the direction of the clip (C) so that the aluminum foil (G) is

exposed, as shown in Figure 5-100.

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Figure 5-100 Peeling off the shielded layer

Step 5 Install the lining (B) on the feeder and tightly crimp the shielded layer (F) of the feeder, as

shown in Figure 5-101.

Figure 5-101 Installing the lining

Step 6 Cut off the aluminum foil (G) and insulation medium (H) along the end face of the lining (B).

Ensure that the length of the conducting line inside the feeder is 4.5 mm, as shown in Figure

5-102.

Figure 5-102 Cutting off the aluminum foil and insulation medium of the feeder

Step 7 Use the file to taper the internal conductor (I) of the feeder, as shown in Figure 5-103.

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Figure 5-103 Tapering the internal conductor of the feeder

Step 8 Use a brush to remove impurities from the cross section of the feeder, as shown in Figure

5-104.

Figure 5-104 Clearing impurities

Step 9 Insert the half-finished part into the main body of the connector (A) and rotate the nut (D) and

the connector's main body until you cannot rotate further, as shown in Figure 5-105.

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Figure 5-105 Installing the connector's main body

Step 10 Use a wrench to fix the nut (D) to connector's main body (A) with recommended tightening

torque 15 N•m, as shown in Figure 5-106.

Figure 5-106 Fixing the nut to the connector shell body

Step 11 Figure 5-107 shows the effect drawing after the assembling is complete.

Figure 5-107 Effect drawing of the straight male coaxial N connector

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5.1.5 Installing Cable Accessories

5.1.5.1 Precautions for Installing Cable Accessories

Tools

NOTE

The illustrations in this document may differ from actual situations, but the installation methods are the

same. For example, in this document, the adapters of cable connectors have separate interfaces. In the

actual situation, the adapters may have interfaces fixed on equipment.

Use dedicated tools provided or specified by Huawei and follow the installation procedure

described here.

Bending Radius

Unless otherwise specified, bending radius (R) of cables or fibers must meet the requirements

listed in Table 5-14.

Table 5-14 Bending radius of cables or fibers

Cable or Fiber Bending Radius (R)

Ordinary cable In normal cases, R ≥ 2d. When the cable is

connected with a connector, R ≥ 5d.

Fiber R ≥ 40 mm (1.57 in.); Bending angle > 90°

NOTE

The letter d indicates the diameter of a cable or fiber.

Precautions for Installation

lHold terminals of cables instead of pulling the cables themselves when installing or

removing cable components.

lDo not insert a connector forcibly when the connector is blocked. Use a dedicated tool to

pull out the connector. Install the connector again after you check that the pins are

inserted properly.

lBefore tightening screws on cable connectors, ensure that the connectors are properly

connected to their adapters. Tighten the screw with appropriate force using a flat-head or

Phillips screwdriver instead of bare hands or an electric screwdriver. If the screw cannot

be screwed into the tapped hole, determine the reason and try again. Do not apply too

much force, or the screw or adapter may be damaged.

lWhen removing densely aligned cables or fiber connectors, use dedicated pliers such as

cable-pulling pliers and fiber-pulling pliers.

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lDo not twist, bend, stretch, or extrude fibers during installation.

lCover the idle fiber connectors with dust caps. Remove the dust caps before using the

fiber connectors.

Requirements for Cable Routing

lTo protect cables, remove the burrs in the cable through-holes or install protective rings

in the holes.

lTo ease the connection and to avoid stress, keep cable joints slack. After connecting

multiple cables to a connector that has multiple interfaces, keep the cables slack to avoid

generating stress.

lBind or clean cables gently because cable distortion affects signal quality.

lKeep cables away from moveable components such as doors.

lSharp objects must not touch cable wiring to prevent damage to cables.

lTo protect power cables, route power cables of the active and standby power modules

separately.

5.1.5.2 Installing Power Adapters

5.1.5.2.1 Installing the OT Terminal

Procedure

lInstall an OT terminal.

a. Align the hole of the OT terminal (conductor upward) with a connecting hole, as

shown in Figure 5-108.

Figure 5-108 Aligning the OT terminal with a connecting hole

NOTE

When you install an OT terminal, the crimping sleeve is installed as shown in Figure 5-109,

where A is correct and B is incorrect.

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Figure 5-109 Installing an OT terminal, showing the orientation of crimping sleeve

b. Place the spring washer and flat washer in turn, mount a matching screw, and fasten

it clockwise, as shown in Figure 5-110.

Figure 5-110 Installing two terminals back to back

NOTICE

Ensure that the OT terminal is not in contact with other terminals or metal

components.

c. Move the cable slightly and ensure that it is securely connected, as shown in Figure

5-111.

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Figure 5-111 Installed OT terminal

lInstall two OT terminals on a post.

Before you install two OT terminals on a post, ensure that the two terminals can be

installed on the post and that the electrical connecting pieces have a large contact area.

Two OT terminals can be installed using any of these methods:

–Bend the upper OT terminal at a 45- or 90-degree angle, as shown in Figure 5-112.

–Cross the two terminals, as shown in Figure 5-113.

Figure 5-112 Bending the upper OT terminal at a 45- or 90-degree angle

Figure 5-113 Crossing two terminals

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NOTICE

If the two terminals are different sizes, place the smaller one above the bigger one. A

maximum of two terminals can be installed on a post.

lTo remove an OT terminal, loosen the screw counterclockwise.

----End

5.1.5.2.2 Installing the Cord End Terminal

Procedure

Step 1 Hold a cord end terminal upright and place it on a terminal jack, as shown in Figure 5-114. To

ensure bump contact and dense connection, place the plain side of the terminal outwards.

Figure 5-114 Placing a terminal on a terminal jack vertically

Step 2 Insert the terminal into the jack vertically, and turn the screw clockwise to fasten the terminal,

as shown in Figure 5-115.

Figure 5-115 Feeding the terminal into the jack

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NOTICE

lEnsure that the exposed section of the terminal is less than 2 mm (0.079 in.) in length.

lDo not press the insulation of the terminal.

lInsert only one terminal into one jack.

Step 3 Move the cable slightly and ensure that it is securely connected.

Step 4 Before you remove a cord end terminal, loosen the screw counterclockwise.

----End

5.1.5.2.3 Installing a 2-Pin Round Connector and a DC Power Cable

This topic describes how to install a 2-pin round connector and a DC power cable and related

notes.

Context

Figure 5-116 shows the 2-pin round connector with a DC power cable.

Figure 5-116 2-pin round connector and a DC power cable

Procedure

Step 1 Waterproof cables to be connected.

1. Wrap a layer of PVC tape, as shown in Figure 5-117.

Figure 5-117 Wrapping the PVC tape

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2. Wrap three layers of insulation tape, as shown in Figure 5-118.

Figure 5-118 Wrapping three layers of the waterproof insulation tape

Figure 5-119 Waterproof insulation tape

3. Wrap three layers of the PVC tape around the waterproof insulation tape, as shown in

Figure 5-120.

Figure 5-120 Wrapping three layers of the PVC tape

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4. Tightly bind the PVC tape at the ends of the wrapping section, as shown in Figure

5-121.

Figure 5-121 Tightly binding the PVC tape

Step 2 Fix the DC power cable connector to the PWR port, as shown in Figure 5-122. Ensure that

positive and negative polarities are correct during the installation.

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Figure 5-122 Installing the round connector

NOTICE

Use the outdoor binding strap to bind cables under the DC power cable connector for weight

bearing, preventing the DC power cable connector from being pulled. Reserve the proper

cable length between the binding point and the PWR port.

----End

5.1.5.3 Installing Ethernet Adapters

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5.1.5.3.1 Installing a Shielded Ethernet Connector

Procedure

Step 1 Hold the male and female connectors, with the male connector facing the female connector, as

shown in Figure 5-123.

Figure 5-123 Holding the male and female shielded connectors

Step 2 Insert the male connector into the female connector, as shown in Figure 5-124.

Figure 5-124 Feeding the male shielded connector into the female shielded connector

Step 3 When you hear a click, the cable connector is completely inserted in the port. (The clip on the

cable connector pops up to fix the connector in the port.) Pull the connector slightly and

ensure that it is securely connected, as shown in Figure 5-125.

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Figure 5-125 Installed shielded Ethernet connector

Step 4 To remove an Ethernet connector, press the locking key and pull out the connector, as shown

in Figure 5-126.

Figure 5-126 Removing a shielded Ethernet connector

----End

5.1.5.3.2 Installing an Unshielded Ethernet Connector

Procedure

Step 1 Hold the male and female connectors, with the male connector facing the female connector, as

shown in Figure 5-127.

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Figure 5-127 Holding the male and female unshielded connectors

Step 2 Feed the male connector into the female connector, as shown in Figure 5-128.

Figure 5-128 Feeding the male connector into the female unshielded connector

Step 3 A crisp click indicates that the connector is locked by the locking key. Pull the connector

slightly and ensure that it is securely connected. Figure 5-129 shows an installed Ethernet

connector.

Figure 5-129 Installed unshielded Ethernet connector

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Step 4 To remove an Ethernet connector, press the locking key and pull out the connector, as shown

in Figure 5-130.

Figure 5-130 Removing an unshielded Ethernet connector

----End

5.1.5.4 Installing Fiber Connectors

Context

NOTICE

lAfter you remove the dustproof cap, ensure that the fiber pins are clean and install them as

soon as possible.

lWhen you disassemble fiber connectors, you must use a dedicated tool if the connectors

are densely installed.

5.1.5.4.1 Cleaning Fiber Connectors

Procedure

Step 1 Clean the pins of a fiber connector by using lint-free cotton and alcohol.

Step 2 Clean the pins again by using dust-free cotton. If necessary, clean the pins by using an air gun.

Ensure that the pins are free from any fiber or debris.

----End

5.1.5.4.2 Installing an FC Fiber Connector

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Procedure

Step 1 Remove the dustproof cap of the FC connector and store it for future use.

Step 2 Align the core pin of the male connector with that of the female connector, as shown in

Figure 5-131.

Figure 5-131 Aligning the male connector with the female connector

Step 3 Align the male connector with the female connector and gently push the male connector until

it is completely seated in the female connector, as shown in Figure 5-132.

Figure 5-132 Feeding the male connector into the female connector

Step 4 Fasten the locking nut clockwise and ensure that the connector is securely installed, as shown

in Figure 5-133.

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Figure 5-133 Fastening the locking nut

Step 5 To disassemble an FC fiber connector, loosen the locking nut counterclockwise, and gently

pull the male connector, as shown in Figure 5-134.

Figure 5-134 Disassembling an FC fiber connector

----End

5.1.5.4.3 Installing an LC Fiber Connector

Procedure

Step 1 Remove the dustproof cap of the LC fiber connector and store it for future use.

Step 2 Align the core pin of the male connector with that of the female connector, as shown in

Figure 5-135.

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Figure 5-135 Aligning the male connector with the female connector

Step 3 Align the male connector with the fiber adapter and gently push the male connector until it is

completely seated in the fiber connector, as shown in Figure 5-136.

Figure 5-136 Feeding the male connector into the female connector

Step 4 A clicking sound indicates that the male connector is locked, as shown in Figure 5-137.

Figure 5-137 Installed LC connector

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Step 5 To disassemble an LC fiber connector, press the locking nut to release the locking clips from

the bore, and gently pull the male connector, as shown in Figure 5-138.

Figure 5-138 Disassembling an LC fiber connector

----End

5.1.5.4.4 Installing the SC Fiber Connector

Procedure

Step 1 Remove the dustproof cap of the SC fiber connector and store it for future use.

Step 2 Align the core pin of the male connector with that of the female connector, as shown in

Figure 5-139.

Figure 5-139 Aligning the male connector with the female connector

Step 3 Feed the fiber connector into the female connector, with your fingers holding the shell of the

fiber connector (not the pigtail). When you hear a click, the fiber connector is secured by the

clips (internal parts, not illustrated in the figure). Pull the fiber connector gently. If the

connector does not loosen, the installation is complete. See Figure 5-140.

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Figure 5-140 Installed SC fiber connector

Step 4 To disassemble an SC fiber connector, hold the shell of the connector (do not hold the fiber)

and gently pull the connector in the direction vertical to the adapter. Unlock the male

connector, and then separate it from the shell, as shown in Figure 5-141.

Figure 5-141 Disassembling an SC fiber connector

----End

5.1.5.4.5 Installing an MPO Connector

Procedure

Step 1 Remove the dustproof cap of the MPO fiber connector and store it for future use.

Step 2 Align the core pin of the male connector with that of the female connector, as shown in

Figure 5-142.

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Figure 5-142 Aligning the male connector with the female connector

Step 3 Hold the shell labeled "PUSH" and feed the male connector into the female connector until

you hear a clicking sound. The male and female connectors are securely installed, as shown in

Figure 5-143.

Figure 5-143 Installed MPO fiber connector

Step 4 To disassemble an MPO fiber connector, hold the shell labeled "PULL" and remove the male

connector, as shown in Figure 5-144.

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Figure 5-144 Disassembling an MPO fiber connector

----End

5.1.6 Replacing the Mold of the Crimping Tool

Procedure

Step 1 Hold the handles of a pair of COAX crimping tools. Loosen the two fastening screws

counterclockwise, as shown in Figure 5-145.

Figure 5-145 Loosening two fastening screws

Step 2 Hold the handles of the COAX crimping tools to open the self-locking mechanism. The jaw

of the COAX crimping tools opens automatically, as shown in Figure 5-146.

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Figure 5-146 Pliers jaw opening automatically

Step 3 Remove the mold from the COAX crimping tools, as shown in Figure 5-147.

Figure 5-147 Removing the mold from the COAX crimping tools

Step 4 Place the mold to be installed into the jaw of the COAX crimping tools and align the screw

holes, as shown in Figure 5-148.

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Figure 5-148 Installing a new mold in the COAX crimping tool

NOTICE

Keep the short side of the mold inwards and the long side outwards, with the teeth of the mold

aligning from the larger size to the smaller size.

Step 5 Hold the handles of the COAX crimping tools tightly to match the mold and the jaw

completely. Align the screw holes, as shown in Figure 5-149.

Figure 5-149 Aligning the screw holes

Step 6 Hold the handles of the COAX crimping tools with one hand. Tighten the two fastening

screws clockwise. Figure 5-150 and Figure 5-151shows the mold installed in the COAX

crimping tool.

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Figure 5-150 Mold installed in the COAX crimping tool

Figure 5-151 An installed mold

----End

5.2 Environmental Requirements for Device Operation

5.2.1 Environmental Requirements for an Equipment Room

5.2.1.1 Requirements for Selecting a Site for an Equipment Room

When designing a project, consider the communication network planning and technical

requirements of the equipment. Also consider hydrographic, geological, seismic, power

supply, and transportation factors.

Construction, structure, heating and ventilation, power supply, lighting and fire-proof

construction of the equipment room should be designed by specialized construction designers

to suit the environmental requirements of devices. The equipment room should also follow

local regulations concerning the industrial construction, environmental protection, fire safety,

and civil air defense. Construction must conform to government standards, regulations, and

other requirements.

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The equipment room should be located in a place free from high temperature, dust, toxic

gases, explosive materials, or unstable voltage. Keep the equipment room away from

significant vibrations or loud noises, as well as power transformer stations.

The specific requirements for selecting a site for an equipment room are as follows:

lThe room should be located at a distance of at least 5 km (3.11 mi.) from heavy pollution

sources such as smelting and coal mines. It should be located at a distance of at least 3.7

km (2.30 mi.) from moderate pollution sources such as chemical, rubber, and

galvanization factories. It should be located at a distance of at least 2 km (1.24 mi.) from

light pollution sources such as packinghouses and tanyards. If these pollution sources

cannot be avoided, ensure that the equipment room is upwind of the pollution sources. In

addition, use a high-quality equipment room or protection products.

lThe room should be located away from livestock farms, or be upwind of the livestock

farms. Do not use an old livestock room or fertilizer warehouse as the equipment room.

lThe equipment room must be far away from residential areas. An equipment room that is

not far away from residential areas must comply with equipment room construction

standards to avoid noise pollution.

lThe room should be located far away from industrial and heating boilers.

lThe room should be at least 3.7 km (2.30 mi.) away from the seaside or salt lake.

Otherwise, the equipment room should be airtight with cooling facilities. In addition,

alkalized soil cannot be used as the construction material. Otherwise, equipment suitable

for wet conditions must be used.

lThe doors and windows of the equipment room must be kept closed to maintain an

airtight room.

lUsing steel doors to ensure sound insulation is recommended.

lNo cracks or openings are allowed on the walls or floors. The outlet holes on the walls or

windows must be sealed. Walls must be constructed such that they are smooth, wear-

resistant, dustproof, flame retardant, sound insulated, heat absorptive, and have

electromagnetic shielding.

lThe air vent of the room should be far from the exhaust of city waste pipes, big cesspools

and sewage treatment tanks. The room should be in the positive pressure state to prevent

corrosive gases from entering the equipment room and corroding components and circuit

boards.

lIt is recommended that the room be on or above the second floor. If this requirement

cannot be met, the ground for equipment installation in the room should be at least 600

mm (23.62 in,) above the maximum flood level.

lThe equipment room should be strong enough to resist winds and downpours.

lThe room should be located away from dusty roads or sand. If this is unavoidable, the

doors and windows of the equipment room must not face pollution sources.

lDo not place air conditioning vents near the equipment so that they blow directly on the

equipment because condensation may be blown into the equipment.

lDo not use decorative materials that contain sulfur in the equipment room.

5.2.1.2 Equipment Room Layout

An equipment room usually contains mobile switching equipment, telecommunications

equipment, power supply equipment, and other auxiliary equipment. To ensure easy

maintenance and management, place the equipment in different rooms. Figure 5-152 shows

the layout of the equipment room.

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Figure 5-152 Layout of the equipment room

Control room Generator room

Transmission

room

Main communication

equipment room

Power distribution

room Battery room

Substation room

Communication cable and optical cable

Power cable

The general layout principles of the equipment room are as follows:

lIt should meet requirements for laying out and maintaining communication cables and

power cables.

lIt should reduce the cabling distance, which facilitates cable maintenance, reduces

potential communication faults, and maximizes efficiency.

5.2.1.3 Construction Requirements for the Equipment Room

Table 5-15 describes the construction requirements for the equipment room.

Table 5-15 Construction requirements for the equipment room

Item Requirements

Area The smallest area of the equipment room can accommodate the

equipment with the largest capacity.

Net height The minimum height of the equipment room should not be less than 3 m

(9.84 ft). The minimum height of the equipment room is the net height

below overhead beams or ventilation pipes.

Floor The floor in the equipment room should be semi-conductive and

dustproof. A raised floor with an ESD covering is recommended. Cover

the raised floor tightly and solidly. The horizontal tolerance of each

square meter should be less than 2 mm (0.08 in.). If raised floors are

unavailable, use a static-electricity-conductive floor material, with a

volume resistivity of 1.0 x 107 ohms to 1.0 x 1010 ohms. Ground this

floor material or raised floor. You can connect them to ground using a

one megohm current-limiting resistor and connection line.

Load-bearing

capacity

The floor must bear loads larger than 150 kg/m2 (0.21 bf/in.2).

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Item Requirements

Door and

windows

The door of the equipment room should be 2 m (6.56 ft) high and 1 m

(3.28 ft) wide. One door is enough. Seal the doors and windows with

dustproof plastic tape. Use double-pane glass in the windows and seal

them tightly.

Wall surface

treatment

Paste wallpaper on the wall or apply flat paint. Do not use pulverized

paint.

Cable trays Use cable trays to arrange cables. The inner faces of the cable trays must

be smooth. The reserved length and width of the cable trays, and the

number, position and dimensions of the holes must comply with the

requirements of device arrangement.

Water pipe Do not pass service pipes, drainpipes, and storm sewers through the

equipment room. Do not place a fire hydrant in the equipment room, but

place it in the corridor or near the staircase.

Internal

partition wall

Separate the area where the equipment is installed from the equipment

room door. The partition wall can block some outside dust.

Installation

position of the

air conditioner

Install air conditioner vents so that the air does not blow directly on

equipment.

Other

requirements

Avoid the proliferation of mildew, and keep out rodents (like mice).

Figure 5-153 Internal partition wall inside the equipment room

5.2.1.4 Equipment Room Environment

Dust on devices may cause electrostatic discharge and result in poor contact for connectors or

metal connection points. This problem can shorten the life span of devices and cause faults.

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The equipment room must be free from explosive, conductive, magnetically-permeable, and

corrosive dust. Table 5-16 lists the requirement for dust concentration in the equipment room.

Table 5-16 Requirements for dust particles in the equipment room

Mechanical active

material

Unit Concentration

Dust particle Particle /m3≤ 3x 104

(no visible dust accumulated

on a workbench in three

days)

Suspending dust mg/m3≤0.2

Precipitable dust mg/m2·h ≤1.5

Description

lDust particle diameter ≥ 5 µm

lSuspending dust diameter ≤ 75 µm

l75 µm ≤ precipitable dust diameter ≤ 150 µm

Take the following measures to meet the requirements:

lUse dustproof materials for ground, wall, and ceiling construction.

lUse screens on the door and windows facing outside. The outer windows should be dust-

proof.

lClean the equipment room regularly and clean the air filter monthly.

lWear shoe covers and ESD clothing before entering the equipment room.

5.2.1.5 Requirements for Corrosive Gases

The room should be free from dusts and corrosive gases, such as SO2, H2S, and NH3. Table

5-17 lists the requirements for the corrosive gas concentration.

Table 5-17 Requirements for corrosive gas concentration

Chemical active

material Unit Concentration

SO2mg/m3≤0.30

H2Smg/m3≤0.10

NOxmg/m3≤0.50

NH3mg/m3≤1.00

Cl2mg/m3≤0.10

HCl mg/m3≤0.10

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Chemical active

material Unit Concentration

HF mg/m3≤0.01

O3mg/m3≤0.05

Take the following measures to meet the requirements:

lAvoid constructing the room near a place where the corrosive gas concentration is high,

such as a chemical plant.

lEnsure the air intake vent of the room is in the prevailing upwind direction from any

pollution source.

lPlace batteries in different rooms.

lA professional service should monitor the corrosive gas conditions regularly.

5.2.1.6 Requirements for ESD Prevention

The absolute value of electrostatic voltage must be less than 1000 V.

Take the following measures to meet this requirement:

lTrain operators about ESD prevention.

lKeep the correct humidity level in the equipment room to reduce the impact of static

electricity.

lLay out an ESD floor in equipment rooms.

lWear ESD shoes and clothing before entering equipment room.

lUse ESD tools, such as wrist straps, tweezers, and pullers.

lGround all conductive materials in the room, including computer terminals. Use ESD

worktables.

lKeep non-ESD materials (such as common bags, foam, and rubber) at least 30 cm (11.81

in.) away from boards and ESD-sensitive components.

5.2.1.7 Electromagnetism Requirements for the Equipment Room

All interference sources, inside or outside the equipment room, can cause equipment problems

with capacitive coupling, inductive coupling, electromagnetic wave radiation, and common

impedance (including grounding system) coupling. Prevent the interference using these

approaches:

lTake effective measures against electrical interference from the power supply system.

lDo not use the working ground of the equipment as the same ground for surge

protection. Separate them as far as possible.

lKeep the equipment far away from high-power radio transmitters, radar units, and high-

frequency and high-current equipment.

lUse electromagnetic shielding if necessary.

5.2.1.8 Requirements for Lightning Proof Grounding

Table 5-18 lists the requirements for lightning proof grounding.

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Table 5-18 Requirements for lightning proof grounding

Item Requirements

Capital

construction

lUse reinforced concrete to construct the equipment room.

lInstall a lightning proof device like a lightning rod outside the room.

lThe lightning proof ground shares the same grounding body with

the protective ground of the room.

Power cables

leading in the

equipment room

need to be

equipped with a

surge protector

lAfter the low-voltage power cables are led into the room, install the

surge protector for the power cables in the AC voltage stabilizer and

the AC power distribution panel (box). Correctly ground the surge

protector nearby.

lFor an equipment room in urban area, install a power supply surge

protector with the nominal discharge current of no less than 20 kA.

For an equipment room that is built in a suburb and subject to

lightning strikes, install a power supply surge protector with the

nominal discharge current of more than 60 kA. For an equipment

room that is built in a mountain area and subject to frequent

lightning strikes, or in a separate high-rise building in a city, install a

power supply surge protector with the nominal discharge current of

more than 100 kA.

lThe ground cable of the surge protector should be no longer than 1

m (3.28 ft).

Grounding for

DC power

distribution

lConnect the DC working ground (positive pole of the -48 V DC

power supply or the negative pole of the 24 V DC power supply)

with the indoor collective ground cable nearby. The total ground

cable should meet the maximum load of the equipment.

lThe power equipment must have a DC working ground cable, which

can connect the power equipment to the collective ground cable of

the telecommunication site (or the protective ground bar of the

equipment room).

Equipotential

connection

lProperly ground the devices and auxiliary devices in the room such

as mobile base station, transmission, switching equipment, power

supply equipment, and cable distribution frame. Connect all PGND

cables to the collective protective ground bar. Connect all PGND

cables in one equipment room to one protective ground bar.

lApply joint grounding to the working ground and protective ground

of devices, which means the two share one grounding network.

lThe cable tray, rack or shell, metal ventilation pipe, metal door or

window of the equipment should be grounded for protection.

General

requirements for

grounding

lDo not connect the neutral line of the AC power cable with the

protective ground of any telecom equipment in the equipment room.

lDo not install a fuse or switch on the ground cable.

lAll ground cables should be as short as possible, and arranged in a

straight line.

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Item Requirements

Grounding

resistance

lThe grounding resistance must be lower than 1 ohm.

lThe upper end of the grounding body should be at least 0.7 m (2.30

ft) over the ground. In cold areas, bury the grounding body below

the frozen ground.

lMeasure the grounding resistance periodically to ensure effective

grounding.

Routing of

signal cable

lDo not arrange the signal cables overhead in the equipment room.

All signal cables must be led into the site underground.

lUse the cables with a metal jacket or place them into a metal pipe if

they come out/in the equipment room.

lGround the idle lines inside the cable in the equipment room.

lSignal cables should be deployed on internal walls. Do not deploy

outdoor aerial cables.

lKeep signal cables away from power cables and surge protection

devices.

Collective

ground cable

lUse a ground ring or ground bar for the collective ground cable.

lDo not use aluminum cables as ground cables. Adopt measures to

prevent electrification corrosion when connecting different metal

parts together.

lUse a copper busbar as the collective ground cable with a cross-

sectional area of no less than 120 mm2 (0.19 in.2), or use the

galvanized flat steel of the same resistance. Insulate the collective

ground cable from the reinforcing steel bars of the building.

Grounding lead-

The grounding lead-in should be a maximum of 30 m (98.42 ft) long.

Use the galvanized flat steel with cross-sectional area of 40 mm x 4

mm (1.58 in. x 0.158 in.) or 50 mm x 5 mm (1.97 in. x 0.197 in.).

5.2.2 Requirements for Power Supply

5.2.2.1 Requirements for AC Power Supply

An AC power supply system consists of power mains, uninterruptible power supplies (UPSs),

and self-supplied electric generators. In addition to meeting the requirements of the server

load, the AC power supply must have a simple connection line, safe operation, flexible

scheduling, and easy maintenance.

The low-voltage power supply should be 3-phase, 5-wire mode or monophase 3-wire mode.

This AC power supply should be 110 V/220 V, with a frequency of 50 Hz.

The UPS should supply the same power and operate at the same phase as the power mains.

The switching time between the UPS and mains should be less than 10 ms; otherwise, the

networking devices will reboot or reset.

For power distribution capacity in the equipment room, both the working current and fault

current of the devices should be considered. Ensure that independent AC power supplies

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protect independent devices. Configure the current-carrying capacity of the protection switch

of the equipment room for more than that of the devices.

Table 5-19 lists the voltage range of the AC power supply for the devices.

Table 5-19 Voltage range of AC power supply

Item Requirements

AC power capacity to

support the devices

-10% to +5% of the rated voltage

AC power capacity to

support the power modules

and important buildings

-15% to +10% of the rated voltage

Frequency of alternating

current

-4% to +4% of the rated value

Voltage wave shape sine

distortion

Within 5% of the rated voltage

The automated electric generator must have a standard interface that supports

telecommunication protocols, remote telecommunication, monitoring, and control.

AC power cables should meet the following specifications:

lAC neutral should have a conductor with the same cross section as the phase line.

lAC cables should have non-flammable insulation. The layout of AC cables should

comply with local regulations. Low-voltage power distribution rooms should comply

with local regulations.

5.2.2.2 Recommendations for AC Power Supply

The following are recommendations for the AC power supply.

lIf the voltage of the power mains that supply power directly to devices exceeds the rated

voltage by -10% to 5%, or exceeds the voltage range that devices can support, a voltage

regulating device or voltage stabilizing device is required.

lIf the mains do not supply power for the device directly, or if the mains voltage exceeds

the rated voltage by -15% to 10% or exceeds the input voltage range of the DC power

supply, a voltage regulating device or voltage stabilizing device is required.

lA UPS or inverter power supply system is required to provide uninterrupted AC power

to support the telecommunication load.

lIf abnormalities occur on the mains, telecommunication servers should be equipped with

a self-supplied electric generator to support the key telecommunication load. The

capacity should be not less than 150% to 200% of the total uninterruptible power supply.

lStorage batteries are usually installed in a parallel connection of two groups. UPS

storage batteries are generally installed in one group. The redundancy required for the

UPS can rely on concatenation or parallel connection. When an inverter or a UPS is

used, the active inverter is determined by the maximum power and a backup inverter is

required.

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5.2.2.3 Requirements for DC Power Supply

The equipment room should receive stable and reliable DC power. Deploy the power

equipment near the telecommunications equipment to make the DC feeder as short as

possible. To reduce power consumption and installation cost, the loop voltage drop from the

battery port to the equipment port should be less than 3.2 V.

lA large-scale enterprise can deploy an independent power supply system on each floor to

supply power to the telecommunications equipment room on the respective floor.

lA medium-scale enterprise can use a power room and a battery room for centralized

power supply or use distributed power supply systems.

lA small-scale enterprise can deploy an integrated power supply system in its equipment

room but must take measures to prevent corrosive gases released from batteries from

eroding circuit boards of telecommunications equipment.

Table 5-20 lists the specifications for the DC power supply.

Table 5-20 Specifications for the DC power supply

Item Requirements

DC power

capacity to

support the surge

current

Greater than 1.5 times the rated current

Regulated

voltage precision

If the AC input voltage is in the range of 85% to 110% of the rated

value, and the load current is in the range of 5% to 100% of the rated

value, the output voltage of the rectifier ranges from -46.0 V to -56.4 V,

with the regulated voltage precision less than or equal to 1%.

Overshoot

amplitude of

switch on/off

Integral value of the DC output voltage ±5%

Peak noise

voltage

≤200 mV

Dynamic

response

The recovery time is less than 200 ms. The overshoot is in the range of

the integral value of the DC output voltage ±5%.

5.2.2.4 Recommendations for DC Power Supply

The following are recommendations for the DC power supply.

lUse distributed power supply mode. Use multiple DC power supply systems and put

power equipment in multiple locations.

lAdopt a standard DC power supply system, and set the output voltage to the

communications equipment within the required range.

lImprove reliability of the AC power supply system to reduce the necessary capacity of

storage batteries. For small offices, increase the capacity of storage batteries if it is

difficult to enhance reliability of the AC power supply system.

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lThe total capacity of the high-frequency switching rectifier must satisfy the power of the

communication loading and battery charging. If there are 10 or fewer active rectifier

modules, configure one backup module. If there are more than 10 active modules,

configure one backup module for every 10 active modules.

lInstall storage batteries in two or more groups. The capacity is determined by the

duration for which the storage batteries must supply power. For most offices, the

batteries should be able to supply power for at least one hour.

5.3 Equipment Grounding Specifications

5.3.1 General Grounding Specifications

Table 5-21 shows the general grounding specifications.

Table 5-21 General grounding specifications

No. Description

1 The working ground and protective ground, including the shielded ground and the

lightning-proof ground of the cable distribution frame should share the same

grounding conductor.

2 The cable trays, shells, metal ventilation pipes, metal doors and windows in the

equipment room should be grounded for protection.

3 The metal parts of the equipment which are electrically floating in normal

conditions should be grounded for protection.

4 The ground cable must be connected securely to the protective ground bar of the

equipment room.

5 Do not use other equipment as part of the ground cable or electrical connection.

5.3.2 Grounding Specifications for an Equipment Room

The grounding resistance of a comprehensive communication building should be less than or

equal to one ohm. The grounding resistance of an ordinary communication office should be

less than five ohms. The grounding resistance in an area where the earth resistance rate is high

should be less than 10 ohms.

5.3.3 Grounding Specifications for Devices

Table 5-22 lists the equipment grounding specifications.

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Table 5-22 Equipment Grounding Specifications

No. Description

1 All communication devices and auxiliary devices (such as mobile base stations,

transmission and switching devices, power supply devices) in the equipment room

should be grounded for protection. Connect all protective ground for various

devices jointly to a general ground bar, and then to the same protective ground bar

in the room together with the protective ground (PGND) of the device.

2 The PGND of the equipment is shorted to the copper ground bar provided by the

customer. The short-circuiting cable used should be a yellow-green plastic

insulated cable with a copper core and a cross-sectional area greater than 25 sq.

mm (0.039 sq. in.).

3 There are grounding terminals and grounding lugs at the lower part of the front

door, rear door and side panel of the cabinet, connected to the grounding terminals

of the cabinet framework through connection cables with cross-sectional area of no

less than 1.6 sq. mm (0.002 sq. in.).

4 Ensure that all metal components of the cabinet conduct well. No insulating

coating should be sprayed on the connection part of the metal components.

5 Connect the cabinets in the same row by fastening captive screws and gaskets on

the top of the cabinets. Do not spray any coating into a rectangular area measuring

30 mm x 50 mm (1.18 in. x 1.97 in.) around the connection hole for a captive bolt.

Measures to prevent rust and corrosion must be taken for this area. Zinc

electroplating with iridescent yellow chromate conversion coating should be

applied to the gasket and nut to ensure good electrical contact.

6 When combining cabinets of the same type, short-circuiting cables are required to

connect the ground busbars (if any) of the cabinets. The cross-sectional area of the

short-circuiting cable is 6 sq. mm (0.009 sq. in.) and is no more than 300 mm (11.8

in.) long. Connect the two ends of the short-circuiting cable to the ground busbar

terminals of neighboring cabinets and fix them firmly.

5.3.4 Grounding Specifications for Communications Power

Supply

Table 5-23 shows the grounding specifications for communication power supplies.

Table 5-23 Grounding specifications for communication power supplies

No. Description

1 The inlet for the AC power cable at the equipment room should be equipped with a

surge protection device (C-level) with a nominal discharge current no less than 20

kA.

2 The protective ground for the power supply and that for communication equipment

share the same grounding conductor. If the power supply and the equipment are in

the same equipment room, use the same protective ground bar for them if possible.

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No. Description

3 Use a surge protection circuit on the AC power interface.

4 The positive of the -48 V DC power supply or negative pole of the 24 V DC power

supply should be grounded at the output of the DC power supply.

5 The working ground and protective ground of the DC power supply equipment

should use the same grounding conductor with the protective ground of the

switching equipment. If the power supply and equipment are in the same

equipment room, use the same protection ground bar for them if possible.

6 Add surge protection on the DC power interface.

5.3.5 Grounding Specifications for Signal Cables

Table 5-24 lists the grounding specifications for signal cables.

Table 5-24 Grounding specifications for signal cables

No. Description

1 Equip the cable outdoors with a metal jacket, well grounded at both ends, or

connect the ends of the metal jacket to the protective ground bar of the equipment

room. For cables inside the equipment room, install surge protection devices at the

interface to the equipment. The PGND cable for the surge protection devices

should be as short as possible.

2 The incoming and outgoing signal cables to and from the office and unused wires

inside the cable should be grounded for protection.

3 The Tone & Data Access (TDA) cable must pass through the Main Distribution

Frame (MDF) with surge protective device (SPD) when going out of the office.

The cable's shield layer should be connected to the protective ground of the MDF.

The MDF should use the same grounding conductor as the cabinet.

4 Do not route signal cables overhead.

5.3.6 Specifications for Laying Out Grounding Cables

Table 5-25 shows the specifications for the ground cable.

Table 5-25 Specifications for laying out ground cables

No. Description

1 The grounding wire should not run parallel to or twist around the signal cable.

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No. Description

2 Bury ground underground or arrange them indoors. Do not route ground cables

overhead.

3 Do not connect two cables together to extend the PGND cable, or add any switches

or fuses.

4 The PGND cable should be an alternating yellow and green plastic insulated one

with a copper core.

5 The neutral line of the AC power cable cannot be connected to the protective

ground of transmission and communication equipment in the equipment room.

6 A PGND cable should be as short as possible, with a length of no more than 45 m

(147.64 ft).

5.4 Engineering Labels for Cables

An engineering label serves as an identifier for on-site installation and maintenance after the

installation. Labels on the cables facilitate correct and orderly connection of cables, and easy

maintenance after installation.

Engineering labels are specialized for power cables and signal cables:

lSignal cables include network cables, optical fibers, and user cables.

lPower cables include the AC power cables and DC power cables.

NOTE

Fill in labels according to specified requirements to keep consistency of labels in the equipment room.

Make a relevant statement in the self-check report.

5.4.1 Introduction to Labels

5.4.1.1 Label Materials

Features:

lThickness: 0.09 mm (0.004 in.)

lColor: chalk white

lMaterial: polyester (PET)

lAmbient temperature: -29°C (-20.2°F) to +149°C (300.2°F)

lPrinted by a laser printer and written with a marker

lPass UL and CSA authentication

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5.4.1.2 Type and Structure

Label for Signal Cables

The label for signal cables is L-shaped with fixed dimensions, as shown in Figure 5-154.

Figure 5-154 Label for signal cables

To specify more clearly the position of a cable, use the dividing lines on the label. For

example, there is a dividing line between the cabinet number and the chassis number, and

another one between the chassis number and the slot number. Each dividing line is light blue

(Pantone 656c) and 1.5 mm x 0.6 mm (0.06 in. x 0.02 in.).

The cut dotted line helps to fold the label when affixed to the cable, and its size is 1 mm x 2

mm (0.04 in. x 0.08 in.).

The word "TO:" (upside down in the figure) at the lower right corner of the label is used to

identify the opposite end of the cable on which the label is affixed.

Power Cable Label

The label for power cables should be attached to the identification plate on the cable ties that

are attached to the cable. The identification plate has an embossed area 0.2 mm x 0.6 mm

(0.008 in. x 0.02 in.) around (symmetric on both sides), and the area in the middle is for

affixing the label, as shown in Figure 5-155.

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Figure 5-155 Power cable label

5.4.1.3 Label Printing

The contents can be printed or written on the labels. Printing is recommended for the sake of

high efficiency and eye-pleasant layout.

Template for Printing

You can obtain a template from the Huawei local office to print labels.

The template is made in Microsoft Word. Follow these instructions to use the template:

lYou can modify the contents of the template. Do not change settings of centered

characters, direction, and fonts.

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lIf many characters need to be filled in, decrease the font size, but make sure that the

printouts are clear and legible.

Merging Cells in the Template

To merge two or more cells, do as follows:

1. Select Edit/Select All.

2. Select Format/Borders and Shading/Borders. Select Box tab and click OK.

3. Drag the mouse to select cells to be merged and select the Table/Merge Cells.

Requirements on the Printer

To print labels, use a laser jet printer of any model. Before printing labels, set up the page and

try printing.

1. Try printing on ordinary paper with both sides blank. Place the blank paper over the

whole page of the label paper, and check whether the page setup conforms to the label

layout.

2. Make sure the printer properties, such as "paper size" and "direction", have been set

correctly.

–If the printout conforms to the sheet of labels, print the labels on the label paper.

–If the printout does not conform, adjust the page setup and try printing again until

the correct printout is produced.

The method for adjusting the page setup is as follows.

1. Select File/Page Setup.

2. Select Layout and set Header and Footer as 0.

3. Select the Margins tab page. Select Left for Gutter Position and adjust the values of Top,

Bottom, Left, and Right.

NOTE

If the warning prompt as shown in Figure 5-156 appears before printing, click Ignore to continue

the printing.

Figure 5-156 Warning prompt before printing

After the page setup has been made correctly, save it for future use. This page setup is only

necessary the first time you use the template to print the labels.

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Requirements for Feeding the Printer

The label paper consists of two layers and has undergone multiple processing procedures such

as printing and cutting. No matter what model of printer you use, feed in the labels one page

at a time. To avoid jamming the labels, never use the auto-feed mode.

Feed in the label paper in the correct direction to ensure that the text is printed in a correct

position.

Requirements for the Printed Label

Make sure that the printed labels satisfy the following requirements:

lAll the printouts must be on the label, and nothing should be printed on the backing layer

of the label page.

lContents in the cells should be aligned in the center. In a single-line printout, the

dividing lines and the word "TO:" should not be covered by printed characters.

lWhen the cells are merged and the printouts are made in multiple lines, avoid covering

the word "TO:" when printing the text. Use the space bar to move the text to the next

line.

5.4.1.4 Writing Labels

Writing Tools

To make sure the printouts are clear and legible, use black markers instead of ball-point pens

to write the labels.

If no marker is available, black ball-point pens are allowed, although not recommended.

Compared with ball-point pens, waterproof markers are better. When writing with a ball-point

pen, do not leave the oil on the label, which may contaminate the label and blur the words.

NOTE

The delivered marker has two nibs. Use the smaller nib to write the labels.

Font

For the sake of legibility, use standard block letters and numbers as shown in Table 5-26

(Times New Roman).

Table 5-26 Standard typeface for handwriting

012345678

9 A B C D E F G H

I J K L M N O P Q

R S T U V W X Y Z

Determine the size of characters based on the number of letters or digits and ensure that the

characters are distinct and tidy.

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Placement of text on a label is shown in Figure 5-157.

Figure 5-157 Placement of text on a label

5.4.1.5 Attaching Labels

After printing or writing the label, remove the label from the page and attach it to the signal

cable, or the identification plate of the power cable. The methods for attaching labels are

described in the following sections.

Label for Signal Cables

lChoose the place to attach labels.

The label is attached 2 cm (0.79 in.) from the connector on a signal cable. In special

cases (for example, to avoid cable bending or affecting other cables), other positions are

allowed to attach the labels. The rectangular part with text is attached facing right or

downward, as shown in Figure 5-158. The details are as follows:

–The identification card is to the right of the cable in vertical cabling.

–The identification card should be downward when you lay out the cable

horizontally.

Figure 5-158 Text area of the label

lProcedure for attaching labels

Figure 5-159 shows the methods and procedures for attaching labels.

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Figure 5-159 Label for signal cables

Power Cable Label

Remove the label from the backing page, and attach it to the identification plate on the cable

tie. The label should be attached to the rectangular flute on the identification plate, and

attached to only one side of the identification plate. The cable ties are bundled at 2 cm (0.79

in.) from the connectors, and other positions are allowed in special circumstances.

Cable ties should be bound on both ends of a cable. After the bundling, the finished

identification plate should be on top of the cable in horizontal cabling, or on the right side of

the cable in vertical cabling, as shown in Figure 5-160. The details are as follows:

lThe identification card is to the right of the cable in vertical cabling.

lThe identification card is on the top of the cable in horizontal cabling. Make sure that the

label is facing out.

Figure 5-160 Binding the label for the power cable

The identification card is on the

top of the cable in horizontal

cabling.

The identification card is to

the right of the cable in

vertical cabling.

TO:

B03 -48V2

TO:

B03 -48V2

Cable

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5.4.1.6 Contents of Engineering Labels

Contents of Labels for Power Cables

Labels for power cables are affixed on only one side of the identification plates. On the labels,

there is information (the part after the word "TO:") about the location of the device on the

other end of the cable, like the location of control cabinet, distribution box or power socket.

Contents of Labels for Signal Cables

The two sides of the label affixed on the signal cable carry information about the location of

the ports connected to both ends of the cable. Figure 5-161 shows the information on both

sides of the labels affixed to the signal cables.

lArea 1 contains the location information of the local end of the cable.

lArea 2 (with the word "TO:") contains the location information of the opposite end of the

cable.

lArea 3 has been folded up inside the label.

Figure 5-161 Printed parts on the label for signal cables

Seen from the cabling end of the equipment, the text part of the label is on the right side of the

cable. The side with "TO:" that is facing outside carries the location information of the

opposite end; and the other side carries the location information of the local end.

In other words, the information in Area 1 at one end is the same as the information in Area 2

at the other end of the cable.

5.4.1.7 Precautions for Using Engineering Labels

When using labels, pay attention to the following points:

lWhen printing, writing, or attaching labels, keep the labels clean.

lSince the label paper is made of moistureproof material, ink-jet printers and ink pens

cannot be used to print and write labels.

lLabels should be attached neatly. New-type labels are L-shaped. If they are pasted at

incorrect locations or in the incorrect direction, the appearance of the device is affected.

lPower cable ties should be attached in the same positions on power cables, with

identification plates on the same side.

lThe positions of "up", "down", "left" or "right" are all based on the viewpoint of the

engineering person who is working on the label.

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5.4.2 Engineering Labels for Optical Fibers

These labels are affixed to the optical fibers that connect the optical interfaces on the boards

in a chassis, or on the device boxes. There are two types of labels for optical cables:

lOne is for the fiber that connects the optical interfaces on two devices.

lThe other is for the fiber that connects the device and the ODF.

5.4.2.1 Labels for the Optical Fibers Connecting Devices

Meaning of the Label

Table 5-27 lists information on both sides of the labels affixed to the optical fibers that

connect two devices.

Table 5-27 Information on labels affixed to the fibers between two devices

Content Meaning Example

MN-B-C-D-

R/T

MN: cabinet

number

M: The cabinet rows from front to back are numbered

from A to Z.

N: The cabinet columns from left to right are numbered

from 01 to 99.

For example, A01 is the cabinet in row A and column

01.

B: chassis

number

Numbered in bottom-up order with two digits, for

example, 01.

C: physical slot

number

Numbered in top-down and left-right order starting

from 01. For example, 01 is the first slot at the top left

of the chassis.

D: optical

interface

number.

Numbered in top-down and left-right order, consistent

with the port sequence number on the device.

R: Receiving

interface

T: optical

transmitting

interface

Example of the Label

Figure 5-162 shows a sample label on an optical fiber.

Figure 5-162 Sample label on an optical fiber between two devices

A01 R

TO:

01 05 01

G01 T

01 01 01

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The meaning of the label is listed in Figure 5-162.

l"A01-01-05-01-R" indicates that the local end of the optical fiber is connected to the

optical receiving interface 01 in slot 5, chassis 01 in the cabinet in row A, column 01 in

the machine room.

l"G01-01-01-01-T" indicates that the opposite end of the optical fiber is connected with

optical transmitting interface 01 in slot 01, chassis 01 in the cabinet in row G, column 01

in the machine room.

5.4.2.2 Labels for the Optical Fibers Connecting the Device and an ODF

Meaning of the Labels

Table 5-28 shows information on both sides of labels attached to an optical fiber between a

device and an optical distribution frame (ODF).

Table 5-28 Information on labels affixed to a fiber between a device and an ODF

Content Meaning Example

MN-B-C-D-

R/T

MN: cabinet

number

For example, A01.

B: chassis

number

Numbered in bottom-up order with two digits, for

example, 01.

C: physical slot

number

Numbered in top-down and left-right order starting

from 01. For example, 01 is the first slot at the top left

of the chassis.

D: optical

interface

number.

Numbered in top-down and left-right order, consistent

with the port sequence number on the device.

R: Optical

receiving

interface

T: optical

transmitting

interface

ODF-MN-B-

C-R/T

MN: row

number and

column number

of an ODF

M: The cabinet rows from front to back are numbered

from A to Z.

N: The cabinet columns from left to right are

numbered from 01 to 99.

For example, G01 is the ODF of row G and column

01.

B: row number

of the terminal

device

Range from 01 to 99, for example, 01-01.

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Content Meaning Example

C: column

number of the

terminal device

R: Optical

receiving

interface

T: optical

transmitting

interface

Example of the Label

Figure 5-163 shows a sample label on an optical fiber.

Figure 5-163 Sample label on an optical fiber between the device and the ODF

ODF R

TO:

G01 01 01

A01 R

01 05 01

Meaning of the label in Figure 5-163

l"ODF-G01-01-01-R" indicates that the local end of the optical fiber is connected to the

optical receiving terminal in row 01, column 01 of the ODF in row G, column 01 in the

machine room.

l"A01-01-05-01-R" indicates that the opposite end of the optical fiber is connected to

optical receiving interface 1 in slot 05, chassis 01 in the cabinet in row A, column 01 in

the machine room.

5.4.3 Engineering Labels for Network Cables

Applicable Ranges

The labels can be applied to Ethernet cables.

Label Content

Table 5-29 shows the information on both sides of the labels affixed to Ethernet cables.

You can also decide the label content based on the actual environment. If the device is not

installed in the cabinet, for example, you can remove the cabinet number.

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Table 5-29 Information on the Ethernet cables

Content Meaning Example

MN-B-C-D MN: cabinet

number

For example, A01 is the first cabinet in row A.

B: chassis

number

Numbered in bottom-up order with two digits, for

example, 01.

C: physical slot

number

Numbered with two digits in top-down and left-

right order. For example, 01.

D: network port

number

Numbered in top-down and left-right orders. For

example, 01.

MN-Z MN: cabinet

number

For example, B02 is the second cabinet in row B.

Z: Location

number

Fill in the location number of the terminal device

on site. If the cable is connected to a device in a

cabinet, specify the serial numbers of the cabinet,

the chassis, and the Ethernet interface of the device.

For example, B02-03-12. If the cable is connected

to the Network Management Station (NMS),

specify the specific location of the NMS.

The contents of the labels for network cables connecting hubs and devices or agents and the

network cables for other purposes should be specified according to actual connections. The

details are as follows:

lFor a network cable connecting a hub and device, the label on the hub end should

indicate the numbers of the chassis and cabinet where the hub resides, and the serial

number on the hub. The label on the device end should indicate the number of the

chassis and cabinet where the device is located. If the device is a standalone device,

provide the specific position of the device.

lFor a network cable connecting a hub and an agent or terminal, the label on the agent or

terminal end should contain the serial number of the network interface. The definitions

of the cabinet number and chassis number are the same as those described in Table 5-29.

lIf the hub is a standalone device without a cabinet or chassis, the label should contain

specific location information that identifies the hub.

The serial number on the hub, the network interface number of the agent or terminal, and the

location of the standalone device should be specified according to actual connections.

Label Example

Figure 5-164 shows a sample label on an Ethernet cable.

Figure 5-164 Sample label on an Ethernet cable

A01

TO:

03 01 01

B02 03 01

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Meaning of the label in Figure 5-164.

l"A01-03-01-01" indicates that one end of the network cable is connected to network

interface 01 in slot 01, chassis 03 of the cabinet in row A, column 01 in the equipment

room.

l"B02-03-01" indicates that another end of the network cable is connected to network

interface 01 in chassis 03 of the cabinet on row B, column 02 in the equipment room. No

slot number is given.

5.4.4 Engineering Labels for User Cables

Attach labels to both ends of a user cable to indicate the locations of the cable on the device

and main distribution frame (MDF).

Meaning of the Engineering Labels for User Cables

Table 5-30 shows the contents of the labels.

Table 5-30 Contents of the engineering labels for user cables

Content Meaning Example

MN-B-C-D MN: cabinet

number

For example, A01 is the first cabinet in row A.

B: frame number Numbered in the bottom-up order with two digits,

for example, 03.

C: physical slot

number

Numbered with two digits in top-down and left-

right order. For example, 01.

D: cable number Numbered with two digits in top-down and left-

right order. For example, 01.

MDF-MN-B-C MN: row number

and column

number of the

MDF

M: The rows of cabinets from front to back are

numbered from A to Z. N: The columns of cabinets

from left to right are numbered from 01 to 99. For

example, G01 is the MDF of Row G and Column

01.

B: row number of

the terminal

device

Ranges from 01 to 99, for example, 01-01.

C: column number

of the terminal

device

Example of the Label

Figure 5-165 shows a sample label on a user cable.

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Figure 5-165 Sample label on a user cable

A01

TO:

03 01 01

MDF G01 01 01

The meaning of the label in Figure 5-165 is as follows:

l"A01-03-01-01" indicates that the local end of the user cable is connected to port 1 in

slot 1, chassis 03 of the cabinet in row A, column 01 in the equipment room.

l"MDF-G01-01-01" indicates that the opposite end of the user cable is connected to the

terminal in row 01, column 01 of the MDF in row G, column 01 in the equipment room.

5.4.5 Engineering Labels for Power Cables

5.4.5.1 Engineering Labels for DC Power Cables

These labels are affixed to the DC power cables that provide power supply for cabinets,

including the -48 V, PGND, and BGND cables. Here, the DC power cables also include power

cables and PGND cables.

The labels for DC power cables are affixed to one side of the identification plates on cable

ties. For details of the labels, see Table 5-31.

Table 5-31 Contents of the label

Content Meaning

MN(BC)-

B--48Vn

MN(BC): BC is written right under MN.

B: chassis number, numbered in bottom-up order with two digits, for

example, 01.

N: power socket number, numbered as 1 to 3 in the bottom-up and left-

to-right orders.

On the loaded cabinet side, only MN is used to identify the cabinet.

On the power cabinet side, MN identifies the row and column number

of the power distribution equipment like a control cabinet and

distribution box, and BC identifies the row and column number of the

-48 V connector. If there is no row number or column number, or the

connector can be identified without them, BC can be omitted. It is

unnecessary to identify the row and column number for BGND and

PGND.

MN(BC)-B-

BGND

MN(BC)-B-

PGND

The label only carries location information about the destination direction of the power cable

whereas information about the local end is unnecessary. That is, the label only carries location

information about the opposite equipment, the control cabinet, or the distribution box. Table

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5-31 lists the information on two -48 V power supplies on the label. The information on other

DC voltages, such as 24 V and 60 V should be given in similar methods.

Make sure that labels are affixed in the correct direction. That is, after the cable ties are

bundled onto the cable, the identification plates with the labels should face up, and the text on

the labels in the same cabinet should be in the same direction. For details, see Figure 5-166.

Figure 5-166 Example of the labels for DC power cables

The meaning of the label in Figure 5-166 is as follows:

lOn the loaded cabinet side, the label "A01/B08--48V2" on the cable indicates that the

cable is -48 V DC supply, which is from the eighth connector in row B of -48 V bus bar

in the cabinet in row A, and column 1 in the equipment room.

lOn the distribution box side, the label "B03--48V2" indicates that the cable is -48 V DC

supply, connected to DC power socket 2 in row B, column 03 in the equipment room.

NOTE

In the power distribution box or the first power cabinet of a row in a transmission equipment room,

every terminal block on the -48 V connector bar has a numeric identification. For example, in the above

label of "A01/B08--48V2", "08" (or sometimes "8") is the numeric identification of the terminal block.

PGND and BGND are two copper bars, on which the terminal blocks are short-circuited.

Therefore, it makes no difference which terminal is connected to them. It is only necessary to

give the row and column of the power distribution box, instead of giving the specific serial

number of the terminal block on the copper bar. For example, if the label on the loaded

cabinet side is "A01-BGND", it means that the power cable is a BGND that connects BGND

copper bar in the power distribution box in row A, column 01 in the machine room.

Information on the labels for PGND cables should be given in a similar way.

5.4.5.2 Engineering Labels for AC Power Cables

These labels are affixed to both ends of an AC power cable that provides AC power supply to

cabinets, including 110/220 V, PGND, and BGND cables. The 110/220 V AC cables and

related PGND and BGND cables are covered with an insulating sheath, so the labels need to

contain only the word "AC" and the cabinet numbers.

The labels for AC power cables are affixed to one side of the identification plates on cable

ties. For details, see Table 5-32.

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Table 5-32 Label content

Content Meaning

MN-(B)-ACn MN: serial number of the cabinet or the socket where the power is led

B: chassis number, numbered in bottom-up order with two digits, for

example, 01.

n: power port number, numbered as 1 to 3 in bottom-up and left-to-right

order.

Serial number of the socket where the power is led in: the location of

the socket is marked according to the actual situation. If the sockets can

be identified by row numbers and column numbers, they can be

numbered following the same rule for the cabinets. If the sockets

cannot be identified by rows and columns, specify the detailed

locations to avoid confusion with other sockets.

The label only carries location information about the opposite equipment and the power

socket; information about the local end is unnecessary.

Make sure that labels are affixed in the correct direction. That is, after the cable ties are

bundled onto the cable, the identification plates with the labels should face up, and the text on

the labels in the same cabinet should be in the same direction, as shown in Figure 5-167.

Figure 5-167 Labels for AC power cables

Label on the loaded cabinet side

(indicating the position of the cable

on the power distribution box)

Label on the distribution box side

(indicating the position of the cable

on the loaded cabinet side)

Meaning of the label in Figure 5-167.

lOn the equipment cabinet side, the label marked "A01-AC1" indicates that the power

cable is connected to the first AC power socket of row A and column 01 in the

equipment room.

lOn the power socket side, the label marked "B01-AC1" indicates that the power cable is

connected to the first AC power socket in the cabinet of row B and column 01 in the

equipment room.

5.5 Guide to Using Optical Modules

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Common Faults of an Optical Module

NOTE

The system may fail to obtain information about non-Huawei-certified optical modules or obtain incorrect

information. You are advised to use Huawei-certified optical modules. Obtain the electronic label of the

optical module and contact technical support personnel to confirm whether it is a Huawei-certified optical

module.

1. An optical module is not completely installed in position.

If the optical module is not completely installed in position and the latch boss is not

secured, the device cannot identify the optical module. After the optical module works

for a long time, it will be ejected under external stress.

2. The optical receptacle on an optical module is contaminated.

If an optical module is not cleaned or protected properly, contaminants may accumulate

on the fiber pin in the optical module. As a result, the coupling efficiency is reduced,

optical signals are cut off, or even worse, the surface of the fiber pin is damaged

permanently.

3. An optical module is burnt.

If high-power optical signals (caused by an optical time domain reflectometer or self-

loop test) are transmitted through an optical module that is used for long-distance

transmission but no optical attenuator is used, the optical power will exceed the overload

power of the avalanche photodiode (APD). Then the optical module is burnt.

The preceding faults lead to temporary or long-term cut-off of optical signals; or even cause

permanent damages to the optical module, affecting communication services.

Measures to Prevent a Loosened Optical Module

1. When installing an optical module, insert it in position. If you hear a click or feel a slight

shake, it indicates that the latch boss is secured.

If the latch boss is not secured, the gold finger of the optical module is not in good

contact with the connector on the board. In this case, the link may be connected but

optical signals will be cut off or the optical module will be loosened when the optical

module is shaken or hit.

2. Figure 5-168 shows the release handle on an optical module when it is open and closed.

When inserting the optical module, make sure that the release handle is closed. At this

time, the latch boss locks the optical module. After the optical module is inserted, try

pulling it out to see if it is installed in position. If the optical module cannot be pulled

out, it is secured.

Figure 5-168 State of the release handle

Close the release handle Open the release handle

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Measures to Prevent Receptacle Contamination

1. Cleaning tissues must be prepared on site. You need to clean the optical connector before

inserting it in the receptacle. This protects the receptacle against contamination on the

surface of the optical connector.

Figure 5-169 Cleaning optical fibers with special cleaning tissues

NOTE

Place at least three cleaning tissues on the work bench. As shown in Figure 5-169, wipe the end of

an optical connector from left to right or from right to left on a cleaning tissue, and then move the

connector end to the unused part of the cleaning tissue to continue.

2. Cover an unused optical module with a protective cap to prevent dust, as shown in

Figure 5-170.

Figure 5-170 Installing a protective cap

If no protective cap is available, use fibers to protect the optical module, as shown in

Figure 5-171.

Figure 5-171 Using fibers to protect an optical module

3. Cover unused optical connectors with protective caps, as shown in Figure 5-172, and

then lay out fibers on the fiber rack or coil them in a fiber management tray to prevent

fibers from being squeezed.

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Figure 5-172 Installing a protective cap on a fiber

4. If a receptacle or an optical connector has not been used for a long time and is not

covered with a protective cap, you need to clean it before using it. Clean a receptacle

with a cotton swab, as shown in Figure 5-173. Clean an optical connector with cleaning

tissues.

Figure 5-173 Cleaning a receptacle with a cotton swab

NOTICE

When cleaning a receptacle, insert the cotton swab and turn it slowly in the receptacle.

Do not use too much strength because the receptacle may be damaged.

5. If optical signals are lost during the operation of a device, use the preceding method to

clean the receptacle or the optical connector. In this manner, the possibility of

contamination can be excluded.

Measures to Prevent an Optical Module from Being Burnt

1. Before using an optical time-domain reflectometer (OTDR) to test the connectivity or the

attenuation of optical signals, disconnect the optical fibers from the optical module.

Otherwise, the optical module will be burnt.

2. When performing a self-loop test, use an optical attenuator. Do not loosen the optical

connector instead of the optical attenuator.

Precautions

1. The optical connector should be vertically inserted in the receptacle to avoid damages to

the receptacle.

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2. Fibers must be inserted into optical modules of the corresponding type. That is,

multimode fibers must be inserted into multimode optical modules, and single mode

fibers must be inserted into single mode optical modules. If a fiber is inserted into an

optical module of a different mode, faults may occur. For example, optical signals will

be lost.

5.6 Fault Tag

*Customer name:

Address:

Contact person:

Tel.: Fax:

Category*: □ RMA □ Return □ Analysis

BOM

Code

Product

Description

Bar

Code*

Fault

Occurring

Date*

Description

of the Fault

Phenomena*

Huawei Technologies AP4050DN-E Wireless LAN Access Point User Manual Hardware Installation and Maintenance Guide

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