rtn 310 v100r001c01 maintenance guide 02.pdf

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OptiX RTN 310 Radio Transmission System

V100R001C01

Maintenance Guide

Issue 02

Date 2012-12-30

HUAWEI TECHNOLOGIES CO., LTD.


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Copyright Huawei Technologies Co., Ltd. 2012. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior written

consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the

customer. All or part of the products, services and features described in this document may not be within the

purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representations

of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue 02 (2012-12-30) Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd.

i
http://www.huawei.com/


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About This Document

Related Versions

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

Product Name Version

OptiX RTN 310 V100R001C01

iManager U2000 V100R008C00

Intended AudienceThis document provides the guidelines to maintaining the OptiX RTN 310. It also describes the

alarms and performance events that are required for troubleshooting during the maintenance.

This document is intended for:

l Network planning engineer

l Data configuration engineer

l System maintenance engineer

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

Symbol Description

Alerts you to a high risk hazard that could, if

not avoided, result in serious injury or death.

Alerts you to a medium or low risk hazard that

could, if not avoided, result in moderate or

minor injury.


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Symbol Description

Alerts you to a potentially hazardous situation

that could, if not avoided, result in equipment

damage, data loss, performance deterioration,

or unanticipated results.

Provides a tip that may help you solve a

problem or save time.

Provides additional information to emphasize

or supplement important points in the main

text.

General Conventions

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

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

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

boldface. For example, log in as user root.

Italic Book titles are in italics.Courier New Examples of information displayed on the screen are in

Courier New.

Command Conventions

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


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

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

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

vertical bars. One item is selected.

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

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





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

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

items can be selected.

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

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

GUI Conventions

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


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

are in boldface. For example, click OK.

> Multi-level menus are in boldfaceand separated by the ">"

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

Change History

Updates between document issues are cumulative. Therefore, the latest document issue contains

all updates made in previous issues.

Updates in Issue 02 (2012-12-30)

This document is the second issue of the V100R001C01 product version.

Update Description

A Alarm Reference Added new alarms.

Updates in Issue 01 (2012-10-30)

This document is the first issue of the V100R001C01 product version.





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Contents

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

1 Safety Precautions.........................................................................................................................1

1.1 General Safety Precautions.................................................................................................................................2

1.2 Warning and Safety Symbols.............................................................................................................................31.3 Electrical Safety..................................................................................................................................................4

1.4 Environment of Flammable Gas.........................................................................................................................5

1.5 Storage Batteries.................................................................................................................................................6

1.6 Radiation.............................................................................................................................................................7

1.6.1 Safe Usage of Optical Fibers.....................................................................................................................8

1.6.2 Electromagnetic Exposure.........................................................................................................................8

1.6.3 Forbidden Areas........................................................................................................................................8

1.6.4 Laser..........................................................................................................................................................9

1.6.5 Microwave...............................................................................................................................................10

1.7 Working at Heights...........................................................................................................................................10

1.7.1 Hoisting Heavy Objects...........................................................................................................................10

1.7.2 Using Ladders..........................................................................................................................................11

1.8 Mechanical Safety............................................................................................................................................13

1.9 Other Precautions.............................................................................................................................................14

2 Routine Maintenance Items......................................................................................................16

3 Emergency Maintenance Guide................................................................................................19

4 Troubleshooting..........................................................................................................................21

4.1 Fault Diagnosis.................................................................................................................................................22

4.1.1 Principles.................................................................................................................................................22

4.1.2 Common Operations................................................................................................................................22

4.2 General Troubleshooting Procedure.................................................................................................................24

4.3 Troubleshooting Microwave Link Faults.........................................................................................................28

4.4 Troubleshooting Ethernet Service Faults.........................................................................................................34

4.5 Troubleshooting DCN Faults............................................................................................................................40

5 Part Replacement.........................................................................................................................46

5.1 Replacing an OptiX RTN 310..........................................................................................................................47

5.2 Replacing an SFP Module................................................................................................................................49


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6 Database Backup and Restoration...........................................................................................51

6.1 NE Database.....................................................................................................................................................52

6.2 Backing Up the Database Manually.................................................................................................................53

6.3 Setting the Database Backup Policy.................................................................................................................54

6.3.1 Setting the User-Defined Backup Policy.................................................................................................54

6.3.2 Executing the Backup Policy of the Device............................................................................................56

6.3.3 Suspending the Backup Policy of the Device..........................................................................................57

6.4 Restoring the Database by NMS......................................................................................................................58

6.5 Restoring Databases from a USB Flash Drive.................................................................................................61

7 Supporting Task..........................................................................................................................63

7.1 Browsing Alarms, Abnormal Events, and Performance Events.......................................................................65

7.1.1 Checking the NE Status(U2000).............................................................................................................65

7.1.2 Checking the NE Status(Web LCT)........................................................................................................66

7.1.3 Browsing Current Alarms(U2000)..........................................................................................................67

7.1.4 Browsing Current Alarms(Web LCT).....................................................................................................69

7.1.5 Browsing History Alarms(U2000)..........................................................................................................71

7.1.6 Browsing History Alarms(Web LCT).....................................................................................................72

7.1.7 Browsing Current Performance Events(U2000)......................................................................................74

7.1.8 Browsing Current Performance Events(Web LCT)................................................................................75

7.1.9 Browsing History Performance Events(U2000)......................................................................................76

7.1.10 Browsing History Performance Events(Web LCT)...............................................................................77

7.1.11 Browsing Current Alarms of the radio link(U2000).............................................................................78

7.1.12 Browsing Current Alarms of the radio link(Web LCT)........................................................................79

7.1.13 Browsing Current Performance Events of the radio link(Web LCT)....................................................80

7.1.14 Browsing Historical Performance Data of a Radio Link(Web LCT)....................................................80

7.1.15 Browsing the Performance Event Threshold-Crossing Records(U2000)..............................................81

7.1.16 Browsing the Performance Event Threshold-Crossing Records(Web LCT)........................................82

7.1.17 Browsing Abnormal Events(U2000).....................................................................................................83

7.1.18 Browsing Abnormal Events(Web LCT)................................................................................................84

7.1.19 Browsing UAT Events(U2000).............................................................................................................86

7.1.20 Browsing UAT Events(Web LCT)........................................................................................................87

7.2 Setting Alarm and Performance Management Functions.................................................................................887.2.1 Configuring the Performance Monitoring Status of NEs........................................................................88

7.2.2 Suppressing Alarms.................................................................................................................................89

7.2.3 Reversing Alarms for Ports.....................................................................................................................90

7.2.4 Setting Bit Error Thresholds for Microwave Ports..................................................................................91

7.2.5 Setting Monitoring and Auto-Report Status of Performance Events......................................................92

7.2.6 Setting Performance Thresholds..............................................................................................................92

7.2.7 Resetting Performance Registers.............................................................................................................93

7.3 Querying a Report............................................................................................................................................94

7.3.1 Querying the Board Information Report(U2000)....................................................................................94

7.3.2 Querying the Board Information Report(Web LCT)...............................................................................95





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7.3.3 Querying the Board Manufacturing Information Report(U2000)...........................................................96

7.3.4 Querying the Board Manufacturing Information Report(Web LCT)......................................................97

7.3.5 Querying the Microwave Link Information Report.................................................................................98

7.3.6 Querying the Network-wide License Report...........................................................................................99

7.4 Software Loopback.........................................................................................................................................100

7.4.1 Setting Loopbacks for Ethernet Ports....................................................................................................100

7.4.2 Setting Loopback for the IF Board........................................................................................................101

7.5 Reset...............................................................................................................................................................104

7.5.1 Cold Reset..............................................................................................................................................104

7.5.2 Warm Reset...........................................................................................................................................105

7.6 Packet Service Diagnosis................................................................................................................................107

7.6.1 E-LAN Service Loopback Detection.....................................................................................................107

7.6.2 Performing Intelligent Service Fault Diagnosis for E-Line Services....................................................108

7.7 Detecting Consecutive Waves........................................................................................................................108

7.8 PRBS Test.......................................................................................................................................................109

7.9 Querying the License Capacity.......................................................................................................................111

7.10 Scanning Interfering Signals........................................................................................................................111

7.11 Setting the Automatic Release Function......................................................................................................112

7.12 QueryingPower Consumption of NE...........................................................................................................113

7.13 Queryingthe Attributes of an Ethernet Port.................................................................................................114

7.14 Setting Traffic, Physical Bandwidth, or Bandwidth Utilization of Ethernet Ports.......................................114

7.15 Querying Traffic, Physical Bandwidth, or Bandwidth Utilization of Ethernet Ports...................................115

7.16 End-to-End Management of Fibers and Radio Links...................................................................................1167.16.1 Expanding/Collapsing Fibers and Cables............................................................................................116

7.16.2 Querying the Radio Link Information.................................................................................................117

7.16.3 Querying the Radio Link Performance................................................................................................118

A Alarm Reference.......................................................................................................................119

A.1 Alarm List......................................................................................................................................................120

A.2 Alarms and Handling Procedures..................................................................................................................124

A.2.1 AM_DOWNSHIFT........................................................................ ......................................................124

A.2.2 BDTEMP_SENSOR_FAIL..................................................................................................................126

A.2.3 BOOTROM_BAD................................................................................................................................126A.2.4 CLK_LOCK_FAIL...............................................................................................................................127

A.2.5 DBMS_DELETE..................................................................................................................................129

A.2.6 DBMS_ERROR....................................................................................................................................129

A.2.7 DBMS_PROTECT_MODE.................................................................................................................130

A.2.8 DCNSIZE_OVER.................................................................................................................................131

A.2.9 ERPS_IN_PROTECTION....................................................................................................................132

A.2.10 ETH_AUTO_LINK_DOWN.............................................................................................................133

A.2.11 ETH_CFM_AIS..................................................................................................................................134

A.2.12 ETH_CFM_LOC................................................................................................................................135

A.2.13 ETH_CFM_MISMERGE...................................................................................................................137





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A.2.14 ETH_CFM_RDI.................................................................................................................................138

A.2.15 ETH_CFM_UNEXPERI....................................................................................................................140

A.2.16 ETH_EFM_DF...................................................................................................................................141

A.2.17 ETH_EFM_EVENT...........................................................................................................................143

A.2.18 ETH_EFM_LOOPBACK...................................................................................................................144

A.2.19 ETH_EFM_REMFAULT...................................................................................................................145

A.2.20 ETH_LINK_DOWN...........................................................................................................................146

A.2.21 ETH_LOS...........................................................................................................................................147

A.2.22 ETH_NO_FLOW............................................................ ...................................................................149

A.2.23 ETHOAM_SELF_LOOP...................................................................................................................150

A.2.24 FLOW_OVER....................................................................................................................................151

A.2.25 HARD_BAD.......................................................................................................................................152

A.2.26 IN_PWR_ABN...................................................................................................................................155

A.2.27 LAG_DOWN......................................................................................................................................156

A.2.28 LAG_MEMBER_DOWN..................................................................................................................157

A.2.29 LASER_MOD_ERR...........................................................................................................................158

A.2.30 LCS_LIMITED...................................................................................................................................159

A.2.31 LICENSE_LOST................................................................................................................................161

A.2.32 LOOP_ALM.......................................................................................................................................161

A.2.33 LSR_WILL_DIE................................................................................................................................163

A.2.34 LSR_NO_FITED................................................................................................................................163

A.2.35 LTI......................................................................................................................................................164

A.2.36 MAC_EXT_EXC...............................................................................................................................165A.2.37 MAC_FCS_EXC................................................................................................................................167

A.2.38 MULTI_RPL_OWNER......................................................................................................................168

A.2.39 MW_AM_TEST.................................................................................................................................169

A.2.40 MW_BER_EXC.................................................................................................................................169

A.2.41 MW_BER_SD....................................................................................................................................172

A.2.42 MW_CFG_MISMATCH....................................................................................................................175

A.2.43 MW_CONT_WAVE..........................................................................................................................176

A.2.44 MW_FEC_UNCOR............................................................................................................................178

A.2.45 MW_LIM............................................................................................................................................181

A.2.46 MW_LOF...........................................................................................................................................182

A.2.47 MW_RDI............................................................................................................................................185

A.2.48 NB_CFG_MISMATCH.....................................................................................................................186

A.2.49 NB_UNREACHABLE.......................................................................................................................189

A.2.50 NESF_LOST.......................................................................................................................................191

A.2.51 NESOFT_MM....................................................................................................................................193

A.2.52 NTP_SYNC_FAIL.............................................................................................................................195

A.2.53 OUT_PWR_ABN...............................................................................................................................196

A.2.54 PASSWORD_NEED_CHANGE.......................................................................................................197

A.2.55 PATCH_ACT_TIMEOUT.................................................................................................................197





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A.2.56 PATCH_DEACT_TIMEOUT............................................................................................................198

A.2.57 PATCH_PKGERR.............................................................................................................................199

A.2.58 PORT_EXC_TRAFFIC......................................................................................................................200

A.2.59 PORTMODE_MISMATCH...............................................................................................................201

A.2.60 POWER_ALM...................................................................................................................................202

A.2.61 PTP_TIMESTAMP_ABN..................................................................................................................203

A.2.62 RADIO_FADING_MARGIN_INSUFF.............................................................................................205

A.2.63 RADIO_MUTE..................................................................................................................................206

A.2.64 RADIO_RSL_BEYONDTH..............................................................................................................207

A.2.65 RADIO_RSL_HIGH..........................................................................................................................208

A.2.66 RADIO_RSL_LOW...........................................................................................................................209

A.2.67 RADIO_TSL_HIGH...........................................................................................................................210

A.2.68 RADIO_TSL_LOW...........................................................................................................................211

A.2.69 RPS_INDI...........................................................................................................................................211

A.2.70 S1_SYN_CHANGE...........................................................................................................................213

A.2.71 SEC_RADIUS_FAIL.........................................................................................................................214

A.2.72 SECU_ALM.......................................................................................................................................215

A.2.73 SRV_SHUTDOWN_LD....................................................................................................................216

A.2.74 SSL_CERT_NOENC.........................................................................................................................217

A.2.75 STORM_CUR_QUENUM_OVER....................................................................................................217

A.2.76 SUBNET_RT_CONFLICT................................................................................................................218

A.2.77 SWDL_ACTIVATED_TIMEOUT....................................................................................................220

A.2.78 SWDL_COMMIT_FAIL....................................................................................................................221A.2.79 SWDL_INPROCESS.........................................................................................................................222

A.2.80 SWDL_NEPKGCHECK....................................................................................................................223

A.2.81 SWDL_PKGVER_MM......................................................................................................................223

A.2.82 SWDL_ROLLBACK_FAIL...............................................................................................................224

A.2.83 SYNC_C_LOS...................................................................................................................................225

A.2.84 SYSLOG_COMM_FAIL...................................................................................................................226

A.2.85 TEMP_ALARM.................................................................................................................................226

A.2.86 TF........................................................................................................................................................228

A.2.87 TIME_LOCK_FAIL...........................................................................................................................228

A.2.88 TIME_LOS.........................................................................................................................................229

A.2.89 TIME_NO_TRACE_MODE..............................................................................................................230

A.2.90 USB_PROCESS_FAIL......................................................................................................................231

A.2.91 XPIC_LOS..........................................................................................................................................232

B Performance Event Reference.................................................................................................234

B.1 Performance Event List..................................................................................................................................235

B.1.1 Microwave Performance Events...........................................................................................................235

B.1.2 Other Performance Events....................................................................................................................237

B.2 Performance Events and Handling Procedures..............................................................................................239

B.2.1 AMDOWNCNT and AMUPCNT........................................................................................................239





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B.2.2 ATPC_P_ADJUST and ATPC_N_ADJUST.......................................................................................240

B.2.3 MAXMEANPATHDELAY, MINMEANPATHDELAY, and AVGMEANPATHDELAY...............240

B.2.4 BDTEMPMAX, BDTEMPMIN, and BDTEMPCUR..........................................................................241

B.2.5 FEC_BEF_COR_ER and FEC_UNCOR_BLOCK_CNT....................................................................242

B.2.6 IF_BBE, IF_ES, IF_SES, IF_CSES, and IF_UAS...............................................................................243

B.2.7 IF_SNR_MAX, IF_SNR_MIN, and IF_SNR_AVG............................................................................244

B.2.8 MAXPHASEOFFSET, MINPHASEOFFSET, and AVGPHASEOFFSET.........................................244

B.2.9 OSPITMPMAX, OSPITMPMIN, and OSPITMPCUR........................................................................245

B.2.10 PATEMPMAX, PATEMPMIN, and PATEMPCUR.........................................................................246

B.2.11 QPSKWS, QPSK_S_WS, QAMWS16, QAM_S_WS16, QAMWS32, QAMWS64, QAMWS128,

QAMWS256, QAMWS512, QAM_L_WS512, QAMWS1024, QAM_L_WS1024, and QAMWS2048.....246

B.2.12 RLHTT, RLLTT, TLHTT, and TLLTT..............................................................................................247

B.2.13 RSL_MAX, RSL_MIN, RSL_CUR, and RSL_AVG........................................................................248

B.2.14 TLBMAX, TLBMIN, and TLBCUR..................................................................................................249B.2.15 TPLMAX, TPLMIN, and TPLCUR...................................................................................................249

B.2.16 RPLMAX, RPLMIN, and RPLCUR..................................................................................................250

B.2.17 TSL_MAX, TSL_MIN, TSL_CUR, and TSL_AVG.........................................................................250

B.2.18 XPIC_XPD_VALUE..........................................................................................................................251

C RMON Event Reference..........................................................................................................252

C.1 RMON AlarmEntry List...............................................................................................................................253

C.2 RMON Performance Entry List.....................................................................................................................254

C.3 RMON Events and Handling Procedures......................................................................................................258

C.3.1 ETHDROP............................................................................................................................................258

C.3.2 ETHFCS................................................................................................................................................259

C.3.3 ETHFRG...............................................................................................................................................260

C.3.4 ETHJAB................................................................................................................................................261

C.3.5 ETHOVER............................................................................................................................................261

C.3.6 ETHUNDER.........................................................................................................................................262

C.3.7 RXBBAD..............................................................................................................................................262

D Alarm Suppression Relationship..........................................................................................264

E Glossary......................................................................................................................................266





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1Safety PrecautionsAbout This Chapter

This topic describes the safety precautions that you must follow when installing, operating, and

maintaining Huawei devices.

1.1 General Safety Precautions

This topic describes essential safety precautions that instruct you in the selection of measuring

and testing instruments when you install, operate, and maintain Huawei devices.

1.2 Warning and Safety Symbols

Before using the equipment, note the following warning and safety symbols on the equipment.

1.3 ElectricalSafety

This topic describes safety precautions for high voltage, lightning strikes, high leakage current,

power cables, fuses, and ESD.

1.4 Environment of Flammable Gas

This topic describes safety precautions for the operating environment of a device.

1.5 Storage Batteries

This topic describes safety precautions for operations of storage batteries.

1.6 Radiation

This topic describes safety precautions for electromagnetic exposure and lasers.

1.7 Working at Heights

This topic describes safety precautions for working at heights.

1.8 Mechanical Safety

This topic describes safety precautions for drilling holes, handling sharp objects, operating fans,

and carrying heavy objects.

1.9 Other Precautions

This topic describes safety precautions for removing and inserting boards, binding signal cables,

and routing cables.


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1.1 General Safety Precautions

This topic describes essential safety precautions that instruct you in the selection of measuring

and testing instruments when you install, operate, and maintain Huawei devices.

All Safety Precautions

To ensure the safety of humans and a device, follow the marks on the device and all the safety

precautions in this document when installing, operating, and maintaining a device.

The "CAUTION", "WARNING", and "DANGER" marks in this document do not cover all the

safety precautions that must be followed. They are supplements to the safety precautions.

Local Laws and Regulations

When operating a device, always comply with the local laws and regulations. The safety

precautions provided in the documents are in addition/supplementary to the local laws and

regulations.

Basic Installation Requirements

The installation and maintenance personnel of Huawei devices must receive strict training and

be familiar with the proper operation methods and safety precautions before any operation.

l Only trained and qualified personnel are permitted to install, operate, and maintain a device.

l Only certified professionals are permitted to remove the safety facilities, and to troubleshoot

and maintain the device.l Only the personnel authenticated or authorized by Huawei are permitted to replace or

change the device or parts of the device (including software).

l The operating personnel must immediately report the faults or errors that may cause safety

problems to the person in charge.

Grounding Requirements

The grounding requirements are applicable to the device that needs to be grounded.

l When installing the device, always connect the grounding facilities first. When removing

the device, always disconnect the grounding facilities last.

l Ensure that the grounding conductor is intact.

l Do not operate the device in the absence of a suitably installed grounding conductor.

l The device must be connected to the protection ground (PGND) permanently. Before

operating the device, check the electrical connections of the device, and ensure that the

device is properly grounded.

Human Safety

l When there is a risk of a lightning strike, do not operate the fixed terminal or touch the

cables.

l

When there is risk of a lightning strike, unplug the AC power connector. Do not use thefixed terminal or touch the terminal or antenna connector.





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NOTE

The preceding requirements apply to wireless fixed station terminals.

l To avoid electric shocks, do not connect safety extra-low voltage (SELV) circuits to

telephone-network voltage (TNV) circuits.

l Do not look into optical ports without eye protection. Otherwise, human eyes may be hurtby laser beams.

l Before operating the device, wear an ESD protective coat, ESD gloves, and an ESD wrist

strap. In addition, you need to get off the conductive objects, such as jewelry and watches,

to prevent electric shock and burn.

l In case of fire, escape from the building or site where the device is located and press the

fire alarm bell or dial the telephone number for fire alarms. Do not enter the burning building

again in any situation.

Device Safety

l Before any operation, install the device firmly on the ground or other rigid objects, such ason a wall or in a rack.

l When the system is working, ensure that the ventilation hole is not blocked.

l When installing the front panel, use a tool to tighten the screws firmly, if required.

l After installing the device, clean up the packing materials.

1.2 Warning and Safety Symbols

Before using the equipment, note the following warning and safety symbols on the equipment.

Table 1-1lists the warning and safety symbols of the OptiX RTN 310 and their meanings.

Table 1-1Warning and safety symbols of the OptiX RTN 310

Label Label Name Description

ESD protection label Indicates that the equipment is

sensitive to static electricity.

Radiation warning label Indicates that the equipment

generates electromagnetic

radiation.

High temperature warning label Indicates that the equipment

surface temperature may exceed

70C when the ambient

temperature is higher than 55C.

Wear protective gloves to handle

the equipment.

Grounding label Indicates the grounding position

of a chassis.





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1.3 Electrical Safety

This topic describes safety precautions for high voltage, lightning strikes, high leakage current,

power cables, fuses, and ESD.

High Voltage

DANGER

l A high-voltage power supply provides power for device operations. Direct human contact

with the high voltage power supply or human contact through damp objects can be fatal.

l Unspecified or unauthorized high voltage operations could result in fire or electric shock, or

both.

Thunderstorm

The requirements apply only to wireless base stations or devices with antennas and feeders.

DANGER

Do not perform operations on high voltage, AC power, towers, or backstays in stormy weather

conditions.

High Leakage Current

WARNING

Before powering on a device, ground the device. Otherwise, the safety of humans and the device

cannot be ensured.

If a high leakage current mark is labeled near the power connector of the device, you must

connect the PGND terminal on the shell to the ground before connecting the device to an A/C

input power supply. This is to prevent the electric shock caused by leakage current of the device.





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Power Cables

DANGER

Do not install or remove the power cable with a live line. Transient contact between the core of

the power cable and the conductor may generate electric arc or spark, which may cause fire or

eye injury.

l Before installing or removing power cables, you must power off the device.

l Before connecting a power cable, you must ensure that the label on the power cable is

correct.

Device with Power On

DANGER

Installing or removing a device is prohibited if the device is on.

DANGER

Do not install or remove the power cables of the equipment when it is powered on.

Short Circuits

When installing and maintaining devices, place and use the associated tools and instruments in

accordance with regulations to avoid short-circuits caused by metal objects.

Fuse

WARNING

If the fuse on a device blows, replace the fuse with a fuse of the same type and specifications to

ensure safe operation of the device.

1.4 Environment of Flammable Gas

This topic describes safety precautions for the operating environment of a device.





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DANGER

Do not place or operate devices in an environment of flammable or explosive air or gas.

Operating an electronic device in an environment of flammable gas causes a severe hazard.

1.5 Storage Batteries

This topic describes safety precautions for operations of storage batteries.

DANGER

Before operating a storage battery, you must read the safety precautions carefully and be familiar

with the method of connecting a storage battery.

l Incorrect operations of storage batteries cause hazards. During operation, prevent any short-

circuit, and prevent the electrolyte from overflowing or leakage.

l If the electrolyte overflows, it causes potential hazards to the device. The electrolyte may

corrode metal parts and the circuit boards, and ultimately damage the circuit boards.

l A storage battery contains a great deal of energy. Misoperations may cause a short-circuit,

which leads to human injuries.

Basic PrecautionsTo ensure safety, note the following points before installing or maintaining the storage battery:

l Use special insulation tools.

l Wear an eye protector and take effective protection measures.

l Wear rubber gloves and a protection coat to prevent the hazard caused by the overflowing

electrolyte.

l When handling the storage battery, ensure that its electrodes are upward. Leaning or

reversing the storage battery is prohibited.

l Before installing or maintaining the storage battery, ensure that the storage battery is

disconnected from the power supply that charges the storage battery.

Short-Circuit

DANGER

A battery short-circuit may cause human injuries. Although the voltage of an ordinary battery

is low, the instantaneous high current caused by a short-circuit emits a great deal of energy.

Avoid any short-circuit of batteries caused by metal objects. If possible, disconnect the workingbattery before performing other operations.





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Hazardous Gas

CAUTION

Do not use any unsealed lead-acid storage battery. Lay a storage battery horizontally and fix it

properly to prevent the battery from emitting flammable gas, which may cause fire or device

erosion.

Working lead-acid storage batteries emit flammable gas. Therefore, ventilation and fireproofing

measures must be taken at the sites where lead-acid storage batteries are placed.

Battery Temperature

CAUTION

If a battery overheats, the battery may be deformed or damaged, and the electrolyte may

overflow.

When the temperature of the battery is higher than 60C, you need to check whether the

electrolyte overflows. If the electrolyte overflows, take appropriate measures immediately.

Battery Leakage

CAUTION

In the event of acid overflow or spillage, neutralize the acid and clean it up appropriately.

When handling a leaky battery, protect against the possible damage caused by the acid. When

you find the electrolyte leaks, you can use the following substances to counteract and absorb the

leaking electrolyte:

l Sodium bicarbonate (NaHCO3)

l Sodium carbonate (Na2CO3)

In the event of acid overflow or spillage, neutralize the acid and clean it up as recommended by

the battery manufacturer and any local regulations for acid disposal.

If a person contacts battery electrolyte, clean the skin that contacts the battery electrolyte

immediately by using water. In case of a severe situation, the person must be sent to a hospital

immediately.

1.6 Radiation

This topic describes safety precautions for electromagnetic exposure and lasers.





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1.6.1 Safe Usage of Optical Fibers

The laser beam can cause damage to your eyes. Hence, you must exercise caution when using

optical fibers.

DANGER

When installing or maintaining optical fibers, avoid direct eye exposure to the laser beams

launched from the optical interface or fiber connectors. The laser beam can cause damage to

your eyes.

Cleaning Fiber Connectors and Optical Interfaces

CAUTION

If fiber connectors or flanges are contaminated, optical power commissioning is seriously

affected. Therefore, the two endfaces and flange of every external fiber must be cleaned before

the fiber is led into the equipment through the optical distribution frame (ODF) for being inserted

into an optical interface on the equipment.

The fiber connectors and optical interfaces of the lasers must be cleaned with the following

special cleaning tools and materials:

lSpecial cleaning solvent: It is preferred to use isoamylol. Propyl alcohol, however, can alsobe used. It is prohibited that you use alcohol and formalin.

l Non-woven lens tissue

l Special compressed gas

l Cotton stick (medical cotton or long fiber cotton)

l Special cleaning roll, used with the recommended cleaning solvent

l Special magnifier for fiber connectors

1.6.2 Electromagnetic Exposure

This topic describes safety precautions for electromagnetic exposure.

If multiple transmit antennas are installed on a tower or backstay, keep away from the transmit

directions of the antennas when you install or maintain an antenna locally.

CAUTION

Ensure that all personnel are beyond the transmit direction of a working antenna.

1.6.3 Forbidden Areas

The topic describes requirements for a forbidden area.





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l Before entering an area where the electromagnetic radiation is beyond the specified range,

the associated personnel must shut down the electromagnetic radiator or stay at least 10

meters away from the electromagnetic radiator, if in the transmit direction.

l A physical barrier and an eye-catching warning flag should be available in each forbidden

area.

1.6.4 Laser

This topic describes safety precautions for lasers.

WARNING

When handling optical fibers, do not stand close to, or look into the optical fiber outlet directly

without eye protection.

Laser transceivers are used in the optical transmission system and associated test tools. The laser

transmitted through the bare optical fiber produces a small beam of light, and therefore it has

very high power density and is invisible to human eyes. When a beam of light enters eyes, the

eyes may be damaged.

In normal cases, viewing an un-terminated optical fiber or a damaged optical fiber without eye

protection at a distance greater than 150 mm does not cause eye injury. Eye injury may occur,

however, if an optical tool such as a microscope, magnifying glass, or eye loupe is used to view

an un-terminated optical fiber.

Safety Instructions Regarding LasersTo avoid laser radiation, obey the following instructions:

l All operations should be performed by authorized personnel who have completed the

required training courses.

l Wear a pair of eye-protective glasses when you are handling lasers or fibers.

l Ensure that the optical source is switched off before disconnecting optical fiber connectors.

l Do not look into the end of an exposed fiber or an open connector when you are not sure

whether the optical source is switched off.

l Use an optical power meter to measure the optical power and ensure that the optical source

is switched off.l Before opening the front door of an optical transmission device, ensure that you are not

exposed to laser radiation.

l Do not use an optical tool such as a microscope, a magnifying glass, or an eye loupe to

view the optical connector or fiber that is transmitting optical signals.

Instructions Regarding Fiber Handling

Read and abide by the following instructions before handling fibers:

l Only trained personnel are permitted to cut and splice fibers.

l

Before cutting or splicing a fiber, ensure that the fiber is disconnected from the opticalsource. After disconnecting the fiber, cap to the fiber connectors.





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1.6.5 Microwave

When installing and maintaining the equipment of Huawei, follow the safety precautions of

microwave to ensure the safety of the human body and the equipment.

WARNING

Strong radio frequency can harm the human body.

When installing or maintaining an aerial on the tower or mast that is installed with multiple

aerials, switch off the transmitter in advance.

1.7 Working at HeightsThis topic describes safety precautions for working at heights.

WARNING

When working at heights, be cautious to prevent objects from falling down.

The requirements for working at heights are as follows:

l The personnel who work at heights must be trained.

l Carry and handle the operating machines and tools with caution to prevent them from falling

down.

l Safety measures, such as wearing a helmet and a safety belt, must be taken.

l Wear cold-proof clothes when working at heights in cold areas.

l Check all lifting appliances thoroughly before starting the work, and ensure that they are

intact.

1.7.1 Hoisting Heavy Objects

This topic describes the safety precautions for hoisting heavy objects that you must follow wheninstalling, operating, and maintaining Huawei devices.

WARNING

When heavy objects are being hoisted, do not walk below the cantilever or hoisted objects.

l Only trained and qualified personnel can perform hoisting operations.

l

Before hoisting heavy objects, check that the hoisting tools are complete and in goodcondition.





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l Before hoisting heavy objects, ensure that the hoisting tools are fixed to a secure object or

wall with good weight-bearing capacity.

l Issue orders with short and explicit words to ensure correct operations.

l Ensure that the angle between the two cables is less than or equal to 90 degrees during the

lifting, as shown in Figure 1-1.

Figure 1-1Hoisting heavy objects

1.7.2 Using Ladders

This topic describes safety precautions for using ladders.

Checking Ladders

l Before using a ladder, check whether the ladder is damaged. After checking that the ladder

is in good condition, you can use the ladder.

l Before using a ladder, you should know the maximum weight capacity of the ladder. Avoid

overweighing the ladder.

Placing Ladders

The proper slant angle of the ladder is 75 degrees. You can measure the slant angle of the ladderwith an angle square or your arms, as shown in Figure 1-2. When using a ladder, to prevent the





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ladder from sliding, ensure that the wider feet of the ladder are downward, or take protection

measures for the ladder feet. Ensure that the ladder is placed securely.

Figure 1-2Slanting a ladder

Climbing Up a Ladder

When climbing up a ladder, pay attention to the following points:

l Ensure that the center of gravity of your body does not deviate from the edges of the twolong sides.

l Before operations, ensure that your body is stable to reduce risks.

l Do not climb higher than the fourth rung of the ladder (counted from up to down).

If you want to climb up a roof, ensure that the ladder top is at least one meter higher than the

roof, as shown in Figure 1-3.

Figure 1-3Ladder top being one meter higher than the roof





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1.8 Mechanical Safety

This topic describes safety precautions for drilling holes, handling sharp objects, operating fans,

and carrying heavy objects.

Drilling Holes

WARNING

Do not drill holes on the cabinet without prior permission. Drilling holes without complying

with the requirements affects the electromagnetic shielding performance of the cabinet anddamages the cables inside the cabinet. In addition, if the scraps caused by drilling enter the

cabinet, the printed circuit boards (PCBs) may be short-circuited.

l Before drilling a hole on the cabinet, remove the cables inside the cabinet.

l Wear an eye protector when drilling holes. This is to prevent eyes from being injured by

the splashing metal scraps.

l Wear protection gloves when drilling holes.

l Take measures to prevent the metallic scraps from falling into the cabinet. After the drilling,

clean up the metallic scraps.

Sharp Objects

WARNING

Wear protection gloves when carrying the device. This is to prevent hands from being injured

by the sharp edges of the device.

Fans

l When replacing parts, place the objects such as the parts, screws, and tools properly. This

is to prevent them from falling into the operating fans, which damages the fans or device.

l When replacing the parts near fans, keep your fingers or boards from touching operating

fans before the fans are powered off and stop running. Otherwise, the hands or the boards

are damaged.

Carrying Heavy Objects

Wear protection gloves when carrying heavy objects. This is to prevent hands from being hurt.





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WARNING

l The carrier must be prepared for load bearing before carrying heavy objects. This is to prevent

the carrier from being strained or pressed by the heavy objects.l When you pull a chassis out of the cabinet, pay attention to the unstable or heavy objects on

the cabinet. This is to prevent the heavy objects on the cabinet top from falling down, which

may hurt you.

l Generally, two persons are needed to carry a chassis. It is prohibited that only one person

carries a heavy chassis. When carrying a chassis, the carriers should stretch their backs and

move stably to avoid being strained.

l When moving or lifting a chassis, hold the handles or bottom of the chassis. Do not hold

the handles of the modules installed in the chassis, such as the power modules, fan modules,

and boards.

1.9 Other Precautions

This topic describes safety precautions for removing and inserting boards, binding signal cables,

and routing cables.

Removing and Inserting a Board

CAUTION

When inserting a board, wear an ESD wrist strap or ESD gloves, and handle the board gently to

avoid distorting pins on the backplane.

l Slide the board along the guide rails.

l Do not contact one board with another to avoid short-circuits or damage.

l When holding a board in hand, do not touch the board circuits, components, connectors,

or connection slots of the board to prevent damage caused by ESD of the human body to

the electrostatic-sensitive components.

Binding Signal Cables

CAUTION

Bind the signal cables separately from the high-current or high-voltage cables.

Routing Cables

In the case of extremely low temperature, heavy shock or vibration may damage the plastic skinof the cables. To ensure the construction safety, comply with the following requirements:





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l When installing cables, ensure that the environment temperature is above 0C.

l If the cables are stored in a place where the ambient temperature is below 0C, transfer

them to a place at room temperature and store the cables for more than 24 hours before

installation.

l Handle the cables gently, especially in a low-temperature environment. Do not performany improper operations, for example, pushing the cables down directly from a truck.

High Temperature

WARNING

If the ambient temperature exceeds 55C, the temperature of the front panel surface marked the

flag may exceed 70C. When touching the front panel of the board in such an environment,you must wear the protection gloves.





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2Routine Maintenance ItemsRoutine maintenance operations are performed to detect and rectify hidden faults before the

hidden faults cause damage to equipment and affect services.

Routine Maintenance Items Carried Out on the NMS

Table 2-1Routine maintenance items carried out on the NMS

Maintenance Item RecommendedMaintenance Cycle

Remarks

Checking the NE Status Every day l

If the NE icon is green, the NE operatesproperly.

l If the NE icon is gray, the NE is

unreachable due to DCN faults.

l If the NE icon is in other colors, alarms are

reported or exceptions occur. You need to

troubleshoot in time.

Browsing Current Alarms Every day l Handle the alarms by referring to A.2

Alarms and Handling Procedures.

l For port alarms due to the interconnected

equipment, see 7.2.3 Reversing Alarms

for Portsto reduce the number of alarms

and prevent interference to emergent

alarms.

Browsing History Alarms Every week By finding causes of and solutions to

historical alarms, you can take precautions to

avoid related faults.


Maintenance Guide 2 Routine Maintenance Items



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Remarks

Browsing Abnormal Events Every week l Security events are generally records of

normal operations. Investigate the illegal

operations if there are any.

l Abnormal events about equipment have

been properly solved.

Browsing History

Performance Events

Every week l Gauge type performance events such as

the board temperature and laser power are

stable.

l Bit error type performance events meet

requirements on link availability.

l Historical received signal levels do notexceed the fade margin for a long time.

l When automatic transmit power control

(ATPC) is disabled, historical transmitted

signal levels are allowed to be 3 dB larger

or smaller than the specified value.

Querying History Transmit

Power and Receive Power

Every week

Testing 1+1 protection

Switching

Half a year Applies only to the equipment that is

configured in 1+1 protection mode.

NOTEDuring the 1+1 protection switching, the protected

services are interrupted. Hence, it is recommended

that you perform the 1+1 protection switchingwhen the traffic is light.

Field Maintenance Items for Indoor Equipment

Table 2-2Field maintenance items for indoor equipment


Remarks

Checking the

telecommunications room

Every two months The site environment meets

equipments operation

requirements.Maintaining the environment

of outdoor cabinets

Half a year





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Field Maintenance Items for Outdoor Equipment

Table 2-3Field maintenance items for outdoor equipment

Maintenance Item RecommendedMaintenanceCycle

Remarks

Checking the appearance of the

OptiX RTN 310a.

Half a year

NOTEPerform a

complete check

after a level-8 or

higher-level

hurricane, an

earthquake, or

otherunexpected

circumstances.

The OptiX RTN 310 is fixedly

mounted and its appearance is in

good condition, without the coating

being damaged or corroded.

Checking the appearance and

azimuth of the antenna.

The antenna is tightly placed and

does not deviate from the designed

angle.

Checking the appearance of the

hybrid coupler.

The hybrid coupler is fixedly

mounted and its appearance is in

good condition, without the coating

being damaged or corroded.


connection of outdoor cables.


connection of the flexible

waveguide.

The shield layer of the power cable

is intact with the connectors being

waterproofed. The feeder clip and

binding strap are tightened.

The connectors of the flexible

waveguide are not damaged and

securely connected. The twist angleof the flexible waveguide is within

the specified range and the clamp is

tightened.

NOTE

a: An area close to a pollution source refers to the area that covers a radius within any of the following

values:

l 3.7 km away from salty waters (such as an ocean and salty water)

l 3 km away from severe pollution sources (such as iron refinery works, and coal mines)

l 2 km away from intermediate pollution sources (such as chemical plants, rubber processing works, and

electroplating workshops)

l 1 km away from light pollution sources (such as food processing works, leather working plants, and

heating boilers).





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3Emergency Maintenance GuideEmergency maintenance operations are performed in the case of emergencies or natural factors

that may result in emergencies during the operation of the equipment.

Definition of Emergency

An emergency refers to an equipment or network incident that arises suddenly and extensively

and may cause significant consequences for network operating and service quality. For

microwave equipment, an emergency refers to service interruption in a large scale.

Purposes of Emergency Maintenance

Emergence maintenance is performed to restore services as soon as possible.

Contingency Plans for Emergency Maintenance

Preparations are necessary for fast service restoration in case of an emergency. The main

contingency measures include:

l Maintaining spare parts inventory (including spare NEs and cables) and synchronizing

spare NEs' software versions with those of the NEs in live networks to ensure fast equipment

replacement in case of an emergency.

l Regularly updating and maintaining network topology diagrams and service configuration

documentation to help fault analysis in case of an emergency.

l Routinely backing up NE databases to allow fast restoration of NE configuration data incase of an emergency.

l Planning standby routes for key services, if possible, to facilitate service restoration in case

of an emergency.

l Performing routine maintenance to keep equipment properly operating and reduce the

possibility of emergencies.

Emergency Maintenance Principles

Preparations are necessary for fast service restoration in case of an emergency. The main

principles include:

l Restore services as soon as possible.


Maintenance Guide 3 Emergency Maintenance Guide



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l Analyze fault symptoms, find causes, and then handle faults. If causes are unknown,

exercise precautions when you perform operations in case the problems become severer.

l If a fault persists, contact Huawei engineers and coordinate with them to handle the fault

promptly.

l Record the operations performed during fault handling and save the original data relatedto the fault.


Maintenance Guide 3 Emergency Maintenance Guide



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4TroubleshootingAbout This Chapter

This chapter describes the general troubleshooting procedure and methods of rectifying common

faults.

4.1 Fault Diagnosis

Accurate fault diagnosis is critical to effective troubleshooting.

4.2 General Troubleshooting Procedure

When handling a fault, make a detailed record of the fault symptoms. To report fault information

or obtain technical support, contact the local Huawei office.

4.3 Troubleshooting Microwave Link Faults

Microwave link faults refer to interruptions or performance deterioration of microwave links.

After microwave link faults occur, an NE reports alarms such as MW_BER_EXC,

MW_BER_SD, MW_FEC_UNCOR, or MW_LOF.

4.4 Troubleshooting Ethernet Service Faults

Ethernet service faults refer to Ethernet service interruptions or deterioration.

4.5 Troubleshooting DCN Faults

A data communication network (DCN) fault prevents the network management system (NMS)

from reaching an NE because of failed or unstable communication between the NMS and the

NE.


Maintenance Guide 4 Troubleshooting



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4.1 Fault Diagnosis

Accurate fault diagnosis is critical to effective troubleshooting.

4.1.1 Principles

Faults on transmission equipment generally affect services in a large area. Fault diagnosis aims

to narrow down afault area to find out the fault cause.

Table 4-1lists basic fault diagnosis principles that have been concluded based on characteristics

of transmission equipment.

Table 4-1Fault diagnosis principles

Principle Description

Peripherals and then

transmission equipment

Rule out external faults, for example, cable damage or faults

on power supply equipment or interconnected equipment.

Then check transmission equipment.

Network and then NEs Locate a fault to a microwave site or a microwave link hop.

Links and then services Rectify microwave link faults first because they may cause

alarms on service ports. Then check services.

High-severity alarms and then

low-severity alarms

Handle high-severity alarms first, such as critical alarms and

major alarms, and then low-severity alarms, such as minoralarms and suggestions.

4.1.2 Common Operations

This section describes common operations on the network management system (NMS) for fault

diagnosis.

Table 4-2Common operations for fault diagnosis

Operation

OperationInstruction(U2000)

OperationInstruction (WebLCT) Description

Check and analyze

alarms.

7.1.3 Browsing

Current Alarms

(U2000)

7.1.4 Browsing

Current Alarms

(Web LCT)

Checking and analyzing alarms is the most

direct method for fault diagnosis. After a

fault occurs, check for current and historical

alarms on the suspected faulty equipment.

By comparing the actual fault symptoms

and time with those recorded in the alarms,

you can narrow down the suspected fault

area.

7.1.5 Browsing

History Alarms

(U2000)

7.1.6 Browsing

History Alarms

(Web LCT)





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Operation

OperationInstruction(U2000)

OperationInstruction (WebLCT) Description

Analyze microwave

link performance

events.

Querying Historical Transmit Power and

Receive Power

By analyzing the current and historical

receive and transmit power records of a

microwave link, you can determine the fault

type (line-of-sight problem, fading, or

transceiver fault) to facilitate quick fault

diagnosis.

Querying the SNR Value of a Microwave

Link

Analyze Ethernet

remote network

monitoring

(RMON)

performance

statistics.

Using RMON Use remote network monitoring (RMON)

performance statistics to diagnose faults that

cause Ethernet service performance to

deteriorate. RMON provides grouped

performance statistics based on the number

of received packets/bytes and the number of

transmitted packets/bytes.

By comparing and analyzing traffic and

performance data at key points over

Ethernet service paths, you can identify

bottlenecks and fault points at which

services are improperly configured.

Diagnose Ethernet

services.

7.6.1 E-LAN Service Loopback Detection The Ethernet local area network (E-LAN)

service loop detection function promptly

detects and releases E-LAN service loops.

This prevents broadcast storms, which will

result in network congestion.

7.6.2 Performing

Intelligent Service

Fault Diagnosis for

E-Line Services

- The U2000 provides intelligent fault

diagnosis for end-to-end Ethernet line (E-

Line) services. Operation, administration

and maintenance (OAM) is deployed to

check configuration consistency, traffic,

and packet loss on sites over a specified

path.

Use built-in

diagnosis and test

functions.

7.8 PRBS Test Bit error tests check the transmission

continuity and quality of a service path.

7.10 Scanning Interfering Signals Frequency scanning checks for interferenceon microwave links.

Testing the Latency, Throughput, and

Packet Loss Ratio

Ethernet service performance tests help to

identify service deterioration.

Testing the Long-term Packet Loss Ratio

Perform loopbacks. 7.4.1 Setting Loopbacks for Ethernet

Ports

A loopback is a method of returning signals

to their source at a specified point. If

services are interrupted, loopbacks can be

performed to check whether network

sections are in good conditions to narrow

down fault areas.

7.4.2 Setting Loopback for the IF Board





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4.2 General Troubleshooting Procedure

When handling a fault, make a detailed record of the fault symptoms. To report fault information

or obtain technical support, contact the local Huawei office.

General Troubleshooting Procedure

Figure 4-1General troubleshooting procedure

Start

Record fault symptoms.

Diagnose and handle

the fault.

Is the fault rectified?

Report to Huawei.

Work out a solution

together.

Is the fault rectified?

Write a troubleshooting

report.

End

Rectify external faults.

No

Yes

Yes

No

No

Is the faultcaused by external

factors?

Yes

1

3 4

2

5





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Table 4-3General troubleshooting procedure

CommentNo.

Description

1 Make a true and detailed record of the fault, including the time when the faultoccurred and any operations performed leading up to and after the occurrence.

Collect alarms, performance events, and other important information.

You can perform one-click data collection using the U2000.

2 For OptiX RTN 310, a common external cause is a power supply fault. Handle

the fault yourself by referring to Table 4-4, or contact a power engineer.

3 Determine the fault type according to preliminary analysis on alarms at the

network operations center (NOC). Handle different types of faults as follows:

l If a microwave link is faulty, follow instructions in 4.3 Troubleshooting

Microwave Link Faults.

l If an Ethernet service is faulty, follow instructions in 4.4 TroubleshootingEthernet Service Faults.

l For faults of other types, handle alarms in descending order of severities

according to A.2 Alarms and Handling Procedures.

l If services are running properly but the NE is unreachable to the network

management system (NMS), follow instructions in 4.5 Troubleshooting

DCN Faults.

If the faulty NE cannot be managed at the NOC, follow instructions in Figure

4-2and Table 4-4to handle the fault onsite.

4 To report fault information or obtain technical support, contact the local

Huawei off

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