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Chapter 1 Overview of Routine Maintenance 1-1................................................

1.1 Definition of Routine Maintenance 1-1.........................................................1.2 Routine Maintenance Suggestions 1-1.........................................................

1.2.1 Basic Principles for Equipment Maintenance 1-1.................................1.2.2 Purposes of Routine Maintenance 1-2.................................................

1.3 Requirements on Equipment Room Environment 1-3..................................1.3.1 Overview of Environment Requirements 1-3.......................................1.3.2 Temperature 1-3..................................................................................1.3.3 Temperature Variation 1-4...................................................................1.3.4 Relative Humidity 1-4...........................................................................1.3.5 Air Cleanness 1-5.................................................................................1.3.6 Electromagnetic Radiation Resistance 1-6..........................................1.3.7 Electrostatic Discharge Prevention 1-7................................................1.3.8 Grounding 1-9......................................................................................

Chapter 2 Routine Maintenance Tasks 2-1..........................................................

2.1 Daily Maintenance Tasks 2-1.......................................................................2.1.1 Equipment Room Environment 2-1......................................................2.1.2 Power Supply System 2-2....................................................................2.1.3 Terminal System 2-3............................................................................2.1.4 Alarm System 2-5.................................................................................2.1.5 Billing System 2-6................................................................................2.1.6 Equipment Operation 2-7.....................................................................2.1.7 Service Implementation 2-9.................................................................2.1.8 Traffic Measurement 2-10......................................................................

2.2 Monthly Maintenance Tasks 2-11...................................................................2.2.1 Cabinets 2-11.........................................................................................2.2.2 Terminal System 2-13............................................................................2.2.3 Spare Parts 2-14....................................................................................

2.3 Yearly Maintenance Tasks 2-15.....................................................................

Chapter 3 Major Maintenance Operations 3-1.....................................................

3.1 Maintaining Grounding System 3-1..............................................................3.1.1 Checking Grounding System 3-1.........................................................3.1.2 Measuring Grounding Resistance 3-2..................................................

3.2 Removing Dust from Equipment 3-3............................................................3.2.1 Cleaning Air Filter Frame 3-3...............................................................3.2.2 Cleaning Air Filter Gauze 3-5...............................................................3.2.3 Cleaning Fan Frame 3-5......................................................................3.2.4 Cleaning Air Deflector 3-6....................................................................3.2.5 Cleaning Board 3-7..............................................................................

Chapter 4 Guide to Dangerous Operations 4-1...................................................

4.1 Dangerous Operations on Hardware 4-1......................................................4.1.1 Dangerous Operations on Boards 4-1.................................................4.1.2 Dangerous Operations on Cables 4-2..................................................4.1.3 Dangerous Operations on Power 4-3...................................................

4.2 Dangerous Operations on Software 4-3.......................................................4.2.1 Overview of Dangerous Operations on Software 4-3...........................4.2.2 Dangerous Operations on Files of BAM and iGWB 4-4.......................4.2.3 Dangerous Operations on Windows 2000 Server 4-4..........................4.2.4 Dangerous Operations on BAM Manager 4-5......................................

4.3 Dangerous Operations on Commands 4-5...................................................4.3.1 Overview of Dangerous Operations on Commands 4-5......................4.3.2 Dangerous Operations on System Management Commands 4-6.......4.3.3 Dangerous Operations on Equipment ManagementCommands 4-7..............................................................................................4.3.4 Dangerous Operations on Local Office InformationManagement 4-8...........................................................................................4.3.5 Dangerous Operations on Charging Data Management 4-9................4.3.6 Dangerous Operations on Gateway Management Commands 4-9.....4.3.7 Dangerous Operations on Signaling and Protocol Commands 4-10.....4.3.8 Dangerous Operations on Route and Trunk Commands 4-11...............4.3.9 Dangerous Operations on Number Analysis Commands 4-12..............4.3.10 Dangerous Operations on Traffic Management Commands 4-13.......4.3.11 Dangerous Operations on Network Management Commands 4-14....

Chapter 5 Maintenance Record Table 5-1............................................................

5.1 Daily Maintenance Record of SoftX3000 5-1...............................................5.2 Monthly Maintenance Record of SoftX3000 5-3...........................................5.3 Yearly Maintenance Record of SoftX3000 5-5.............................................5.4 Data Modification Record of SoftX3000 5-6.................................................5.5 Fault Handling Record of SoftX3000 5-7......................................................5.6 Board Replacement Record of SoftX3000 5-8.............................................

Chapter 6 Common Maintenance Commands 6-1..............................................

Appendix A Acronyms and Abbreviations A-1....................................................

Index .................................................................................................................

Huawei Technologies Proprietary

HUAWEI

U-SYS SoftX3000 SoftSwitch System Routine Maintenance Guide

V300R003


U-SYS SoftX3000 SoftSwitch System

Routine Maintenance Guide

Manual Version T2-010309-20050331-C-3.30

Product Version V300R003

BOM 31033709

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. Please feel free to contact our local office or company headquarters.

Huawei Technologies Co., Ltd.

Address: Administration Building, Huawei Technologies Co., Ltd.,

Bantian, Longgang District, Shenzhen, P. R. China

Postal Code: 518129

Website: http://www.huawei.com

Email: [email protected]


Copyright © 2005 Huawei Technologies Co., Ltd.

All Rights Reserved

No part of this manual may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks

, HUAWEI, C&C08, EAST8000, HONET, , ViewPoint, INtess, ETS, DMC,

TELLIN, InfoLink, Netkey, Quidway, SYNLOCK, Radium, M900/M1800, TELESIGHT, Quidview, Musa, Airbridge, Tellwin, Inmedia, VRP, DOPRA, iTELLIN, HUAWEI OptiX, C&C08 iNET, NETENGINE, OptiX, iSite, U-SYS, iMUSE, OpenEye, Lansway, SmartAX, infoX, and TopEng are trademarks of Huawei Technologies Co., Ltd.

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

Notice

The information in this manual is subject to change without notice. Every effort has been made in the preparation of this manual to ensure accuracy of the contents, but all statements, information, and recommendations in this manual do not constitute the warranty of any kind, express or implied.


About This Manual

Release Notes

The manual applies to U-SYS SoftX3000 SoftSwitch System V300R003 (hereinafter referred to as SoftX3000).

Related Manuals

The related manuals are listed in the following table.

Manual Content

U-SYS SoftX3000 SoftSwitch System Technical Manual-System Description

It provides an overall introduction to the SoftX3000, including product features, applications, and technical specifications.

U-SYS SoftX3000 SoftSwitch System Technical Manual-System Principle

It details on the hardware architecture, component interworking mechanism, and subsystems of alarm, billing, and clock in the SoftX3000.

U-SYS SoftX3000 SoftSwitch System Hardware Description Manual

It details the features and technical specifications of the hardware components of the SoftX3000, including cabinets, frames, boards, cables, and cabinet internal components.

U-SYS SoftX3000 SoftSwitch System Technical Manual–Services and Features

It covers various services and functions supported by the SoftX3000, including voice services, supplementary services, IP Centrex services, multi-media services, value added services, dual homing functions, charging functions, IPTN functions, remote network access functions, and so on.

U-SYS SoftX3000 SoftSwitch System Hardware Installation Manual

It details the installation procedure of the SoftX3000 hardware components, and matters needing attention during the installation process.

U-SYS SoftX3000 SoftSwitch System Software Installation Manual

It covers the detailed procedure of installing the SoftX3000 software, including BAM server, emergency workstation, and client, focusing on the key points that might cause installation failure.

U-SYS SoftX3000 SoftSwitch System Routine Maintenance Guide

It guides the maintenance engineers to perform daily maintenance, monthly maintenance, and yearly maintenance tasks on the SoftX3000.


Manual Content

U-SYS SoftX3000 SoftSwitch System Emergency Maintenance Manual

It guides the maintenance engineers to perform recovery operations in the case of emergencies, such as congestion of global service, AMG, and TMG, and failure of host and BAM.

U-SYS SoftX3000 SoftSwitch System Part Replacement Guide

It guides the maintenance engineers on how to replace hardware components of the SoftX3000, such as boards, fan frame, LAN Switch, and hard disk.

U-SYS SoftX3000 SoftSwitch System Operation Manual-Configuration Guide

It guides the engineers how to configure various data in the SoftX3000, including configuration steps, preparations, database table referencing relationships, and command parameters.

U-SYS SoftX3000 SoftSwitch System Operation Manual-Configuration Examples

It guides the engineers how to configure various data in the SoftX3000, including networking example, configuration script, key parameters and debugging guidance.

U-SYS SoftX3000 SoftSwitch System Operation Manual-Performance Measurement

It guides the engineers how to work on performance measurement tasks and analyze measurement results.

U-SYS SoftX3000 SoftSwitch System Operation Manual-GUI Guide

It guides the engineers how to use the GUI on various clients of the SoftX3000, including operations on menus and navigation tree. In addition, it introduces the operations on TableBrowse.

U-SYS SoftX3000 SoftSwitch System BAM User Manual

It guides the engineers how to install and use the software related to the BAM, including remote maintenance software, anti-virus software, system customized software, and so on.

U-SYS iGateway Bill User Manual

It elaborates on the functioning principle of the iGateway Bill. Also, it teaches you on how to install, maintain, and operate the product.

Organization

The manual describes the maintenance principles, routine maintenance tasks and operations in SoftX3000.

There are five chapters and one appendix in the manual.

Chapter 1 Overview of Routine Maintenance introduces basic principles for equipment maintenance, main objectives for routine maintenance, and basic requirements on equipment room environment for operation of SoftX3000.


Chapter 2 Routine Maintenance Tasks introduces daily maintenance tasks, monthly maintenance tasks, and yearly maintenance tasks that the maintenance personnel need to perform.

Chapter 3 Major Maintenance Operations details the operations on maintaining the grounding system and cleaning the equipment.

Chapter 4 Guide to Dangerous Operations elaborates the dangerous operations of hardware, software and commands, and the potential impacts that might be bestowed on the operation of the equipment.

Chapter 5 Maintenance Record Table details the format and contents of the maintenance record tables recommended by Huawei.

Chapter 6 Common Maintenance Commands lists the commands commonly used in equipment maintenance.

Appendix A Acronyms and Abbreviations lists the abbreviations used in this manual and the corresponding full expressions.

Intended Audience

The manual is intended for the following readers:

NGN network planning experts NGN network administrators NGN system engineers

Conventions

The manual uses the following conventions:

I. General conventions

Convention Description

Arial Normal paragraphs are in Arial.

Boldface Headings are in Boldface.

II. Command conventions


Boldface The keywords of a command line are in Boldface.


III. GUI conventions


< > Button names are inside angle brackets. For example, click the <OK> button.

[ ] Window names, menu items, data table and field names are inside square brackets. For example, pop up the [New User] window.

/ Multi-level menus are separated by forward slashes. For example, [File/Create/Folder].

IV. Mouse operation

Action Description

Click Press the left button quickly.

Right-click Press the right button quickly.

Double-click Press the left button twice continuously and quickly.

V. Symbols

Eye-catching symbols are also used in the manual to highlight the points worthy of special attention during the operation. They are defined as follows:

Caution means reader be extremely careful during the operation.

Note means a complementary description.

Routine Maintenance Guide U-SYS SoftX3000 SoftSwitch System Table of Contents


i

Table of Contents

Chapter 1 Overview of Routine Maintenance ............................................................................. 1-1 1.1 Definition of Routine Maintenance..................................................................................... 1-1 1.2 Routine Maintenance Suggestions.................................................................................... 1-1

1.2.1 Basic Principles for Equipment Maintenance.......................................................... 1-1 1.2.2 Purposes of Routine Maintenance.......................................................................... 1-2

1.3 Requirements on Equipment Room Environment ............................................................. 1-3 1.3.1 Overview of Environment Requirements ................................................................ 1-3 1.3.2 Temperature............................................................................................................ 1-3 1.3.3 Temperature Variation ............................................................................................ 1-4 1.3.4 Relative Humidity .................................................................................................... 1-4 1.3.5 Air Cleanness.......................................................................................................... 1-5 1.3.6 Electromagnetic Radiation Resistance ................................................................... 1-6 1.3.7 Electrostatic Discharge Prevention ......................................................................... 1-7 1.3.8 Grounding................................................................................................................ 1-9

Chapter 2 Routine Maintenance Tasks ....................................................................................... 2-1 2.1 Daily Maintenance Tasks................................................................................................... 2-1

2.1.1 Equipment Room Environment ............................................................................... 2-1 2.1.2 Power Supply System ............................................................................................. 2-2 2.1.3 Terminal System ..................................................................................................... 2-3 2.1.4 Alarm System.......................................................................................................... 2-5 2.1.5 Billing System.......................................................................................................... 2-6 2.1.6 Equipment Operation .............................................................................................. 2-7 2.1.7 Service Implementation........................................................................................... 2-9 2.1.8 Traffic Measurement ............................................................................................. 2-10

2.2 Monthly Maintenance Tasks ............................................................................................ 2-11 2.2.1 Cabinets ................................................................................................................ 2-11 2.2.2 Terminal System ................................................................................................... 2-13 2.2.3 Spare Parts ........................................................................................................... 2-14

2.3 Yearly Maintenance Tasks .............................................................................................. 2-15

Chapter 3 Major Maintenance Operations .................................................................................. 3-1 3.1 Maintaining Grounding System.......................................................................................... 3-1

3.1.1 Checking Grounding System .................................................................................. 3-1 3.1.2 Measuring Grounding Resistance........................................................................... 3-2

3.2 Removing Dust from Equipment........................................................................................ 3-3 3.2.1 Cleaning Air Filter Frame ........................................................................................ 3-3 3.2.2 Cleaning Air Filter Gauze ........................................................................................ 3-4 3.2.3 Cleaning Fan Frame ............................................................................................... 3-5



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3.2.4 Cleaning Air Deflector ............................................................................................. 3-6 3.2.5 Cleaning Board........................................................................................................ 3-7

Chapter 4 Guide to Dangerous Operations ................................................................................ 4-1 4.1 Dangerous Operations on Hardware................................................................................. 4-1

4.1.1 Dangerous Operations on Boards........................................................................... 4-1 4.1.2 Dangerous Operations on Cables........................................................................... 4-2 4.1.3 Dangerous Operations on Power............................................................................ 4-3

4.2 Dangerous Operations on Software .................................................................................. 4-3 4.2.1 Overview of Dangerous Operations on Software.................................................... 4-3 4.2.2 Dangerous Operations on Files of BAM and iGWB................................................ 4-4 4.2.3 Dangerous Operations on Windows 2000 Server................................................... 4-4 4.2.4 Dangerous Operations on BAM Manager............................................................... 4-5

4.3 Dangerous Operations on Commands .............................................................................. 4-5 4.3.1 Overview of Dangerous Operations on Commands ............................................... 4-5 4.3.2 Dangerous Operations on System Management Commands ................................ 4-6 4.3.3 Dangerous Operations on Equipment Management Commands ........................... 4-7 4.3.4 Dangerous Operations on Local Office Information Management.......................... 4-8 4.3.5 Dangerous Operations on Charging Data Management......................................... 4-9 4.3.6 Dangerous Operations on Gateway Management Commands .............................. 4-9 4.3.7 Dangerous Operations on Signaling and Protocol Commands ............................ 4-10 4.3.8 Dangerous Operations on Route and Trunk Commands ..................................... 4-11 4.3.9 Dangerous Operations on Number Analysis Commands ..................................... 4-12 4.3.10 Dangerous Operations on Traffic Management Commands .............................. 4-13 4.3.11 Dangerous Operations on Network Management Commands ........................... 4-14

Chapter 5 Maintenance Record Table ......................................................................................... 5-1 5.1 Daily Maintenance Record of SoftX3000........................................................................... 5-1 5.2 Monthly Maintenance Record of SoftX3000 ...................................................................... 5-3 5.3 Yearly Maintenance Record of SoftX3000 ........................................................................ 5-4 5.4 Data Modification Record of SoftX3000 ............................................................................ 5-6 5.5 Fault Handling Record of SoftX3000 ................................................................................. 5-7 5.6 Board Replacement Record of SoftX3000 ........................................................................ 5-8

Chapter 6 Common Maintenance Commands............................................................................ 6-1

Appendix A Acronyms and Abbreviations ................................................................................A-1

Index ................................................................................................................................................ i-1

Routine Maintenance Guide U-SYS SoftX3000 SoftSwitch System Chapter 1 Overview of Routine Maintenance


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Chapter 1 Overview of Routine Maintenance

1.1 Definition of Routine Maintenance

Routine maintenance is a preventive measure taken periodically during normal operation of the system, for the purposes of discovering and eliminating hidden defects or troubles in the system in time, and ensuring the safe and stable operation of the system for a long term.

1.2 Routine Maintenance Suggestions

1.2.1 Basic Principles for Equipment Maintenance

To completely exert the equipment’s performance and function, avoid various accidents, ensure the long-term safe and stable operation of SoftX3000, and lower the maintenance cost, you need to take the following basic principles into consideration before maintaining the equipment:

Pay full attention to the importance of routine maintenance. Ensure that the maintenance work is carried out correctly and orderly by establishing strict regulations for equipment management and maintenance.

The equipment room environment must meet the requirements stipulated in the related national or industrial standards. The equipment room should be clean and equipped with dust-proof, moisture-proof, and rodent-resistant devices.

Maintenance personnel must be trained before performing maintenance work. They must learn necessary equipment maintenance knowledge, operation regulations, and industry security regulations, and grasp basic operation skills and emergency handling techniques on equipment.

Maintenance personnel must carry out routine check and test and record the corresponding results every day according to the suggestions described in this manual.

If any difficulty is met during maintenance, maintenance personnel must record the original information in detail, and then contact Huawei Customer Service Center or Regional Office of Huawei in time.

If any emergency occurs, maintenance personnel must keep calm and handle it according to the related procedures as described in this manual, and immediately contact Huawei Customer Service Center (refer to the second page in Cover of this manual for the contact method) or Regional Office of Huawei.

The system administrator must keep the management-level passwords from others and modify them periodically. Passwords should be classified into different levels and allocated based on the operation authorities of the maintenance



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personnel and workstations for the purposes of ensuring secure operation of the terminal system.

Record all major operations such as board switchover, system resetting, and software loading, and carefully confirm whether the operations are feasible before carrying out them. Only after the corresponding backup, emergency, and security measures are made, can the qualified maintenance personnel perform the operations. Maintenance personnel are prohibited from installing or running non-standard software on such critical computers as BAM, iGWB, and emergency workstation. The non-standard software includes firewall software, anti-virus software, games software, and pirated software.

Except the software delivered by Huawei with the equipment, the other software cannot be used to access or modify the database directly; otherwise, unexpected result will occur.

Modify office data under authorization and control. Maintenance personnel must back up the office data before modifying it, and record the modified content.

Keep sufficient spare parts in storage for the replacement of back-to-fix faulty parts, especially such primary boards as the SMUI, IFMI, BSGI, MSGI, and FCCU/FCSU.

1.2.2 Purposes of Routine Maintenance

I. Classification of routine maintenance

Depending on the period, routine maintenance can be divided into two types: daily maintenance and periodic maintenance.

II. Daily maintenance

Daily maintenance refers to the simple maintenance operations implemented by the common maintenance personnel every day, such as checking equipment room environment, power supply system, bills, and alarms. Daily maintenance serves the following purposes:

To recognize alarms generated by the equipment or the existing defects of the equipment in time and take appropriate measures accordingly, thus keeping stable operation of the equipment and lowering rate of failure.

To recognize abnormal phenomenon occurring during the operation of the billing system and handle it in time, thus reducing economic loss due to loss of bills.

To grasp the operation state of both equipment and network in real time and find out the operation tendency of them, thus improving the handling efficiency of maintenance personnel on emergency accidents.

III. Periodic maintenance

Periodic maintenance refers to the complicated maintenance operations implemented by the trained maintenance personnel periodically, such as checking cables, measuring



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grounding resistance, cleaning equipment, and so on. Periodic maintenance serves the following purposes:

To keep the equipment in good state and ensure the safe and stable operation of it.

Through periodic check, backup, test, and cleaning, to find out the defects of the equipment in time during operation such as natural aging, function out of work, and deterioration of performance, and then to take appropriate measures accordingly.

1.3 Requirements on Equipment Room Environment

1.3.1 Overview of Environment Requirements

To enable SoftX3000 to work safely and stably for a long term and lower the rate of failure caused by environment factors, you need to improve the environment conditions of the equipment room by taking effective measures and make the conditions meet the basic requirements presented in this manual.

1.3.2 Temperature

I. Basic requirements

Install ventilating arrangement and air-conditioner in the equipment room to keep the indoor temperature in range of 5°C to 45°C. In the temperature range of –5°C to +5°C and 45°C to 55°C, which are regarded as the short-term working conditions, it is prohibited that the equipment works for over 48 hours continuously and the accumulated working duration each year exceeds 15 days.

Note:

The measurement of temperature and humidity must be conducted at the point two meters above the floor and 0.4 meters away from the front side of the equipment (without protection boards in both front and back sides).

II. Effect on equipment operation

Temperature is an important factor affecting the long-term reliable operation of the communication equipment. Overly high or low temperature will impose ill effects on the equipment operation.

When the temperature is overly high, ions in the integrated circuits will diffuse or drift increasingly. The electrons move faster to multiply the penetrating current, which finally leads to damage of circuits caused by thermal breakdown.



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When the temperature is overly high, the resistance value and the capacity of electrolysis and capacitance in the communication equipment will change, which causes the alteration of circuit parameters and finally leads to deterioration of equipment performance.

When the temperature is overly high, sockets, plugs, and switches are prone to back contact with each other due to heat caused flatulence or cold caused shrink, which jeopardizes the reliable operation of the equipment.

When the temperature is overly high or low, the master clock frequency of the crystal oscillator circuits will change, which affects the synchronization between different equipment and leads to rise of bit error rate and slip rate.

Overly high temperature will accelerate the aging speed of insulating material, while overly low temperature will make insulating material fragile. Both will decrease the lifespan of the equipment.

1.3.3 Temperature Variation


Take proper temperature control measures in the equipment room to avoid great variation of indoor temperature. Keep the temperature variation rate per hour not more than ±5°C.


Temperature variation affects the heat capacity of various parts of the equipment. Due to different materials and volumes, the heat capacity of various parts varies a lot; therefore, their sensibility to temperature variation is different, too.

The higher the heat capacity is, the greater the effect imposed by temperature variation on the components will be. It is the same case reversely. In addition, when the temperature changes dramatically, different stresses will be generated on different components due to heat caused flatulent and cold caused shrink, which will jeopardize the mechanical structure of the equipment and even lead to break of circuit boards or fall-apart of components.

1.3.4 Relative Humidity


Install appropriate dehumidifying or humidifying device in the equipment room to maintain the indoor relative humidity always in range of 5% to 65%. If the relative humidity is lower than 5% or ranges from 65% to 95%, which are regarded as the short-term working conditions, it is prohibited that the equipment works for over 48 hours continuously and the accumulated working duration each year exceeds 15 days.



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Note:

The measurement of temperature and humidity must be conducted at the point two meters above the floor and 0.4 meters away from the front side of the equipment (without protection boards in both front and back sides).


When the relative humidity is overly high, a layer of water membrane will be absorbed on the surface of electronic components. According to the research, when the relative humidity is over 65%, the water membrane can be as thick as 0.001 µm to 0.01 µm. The water membrane will result in conductivity and affect the electrical performance of the integrated circuits.

When the relative humidity is overly high, magnetoconductivity rate of the magnetic materials will be affected and connecting pieces and leads will be prone to oxidization and rustiness, thus leading to bad contact or short-circuiting.

When the relative humidity is overly low, static will be generated due to the friction between running machine, raised floor, and operation personnel in the equipment room.

When the relative humidity is overly low, electriferous dust and particles in the air will increase greatly, which deteriorates air cleanness in the equipment room and imperils the stable operation of the equipment.

1.3.5 Air Cleanness


There are two items for judging the air cleanness level: thickness of mechanical active substance and that of chemical active substance. Take proper protection measures in the equipment room to meet the following requirements:

There is no explosive, conductive, magnetoconductive, or erosive dust. The thickness of mechanical active substance must comply with the specifications

listed in Table 1-1.

Table 1-1 Specifications on thickness of mechanical active substance

Mechanical active substance Unit Content Diameter

Dust particles Particle/m³ =3×105 ≤ 5 µm

Suspended dust mg/m³ =0.2 ≤ 75 µm

Deposited dust mg/m²·h =1.5 75 µm–150 µm

Grit mg/m³ ≤30 150 µm–000 µm



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The thickness of chemical active substance must comply with the specifications listed in Table 1-2.

Table 1-2 Thickness of harmful gas

Chemical active substance Unit Content

SO2 mg/m³ 0.30–1.00

H2S mg/m³ 0.10–0.50

NO2 mg/m³ 0.50–1.00

NH3 mg/m³ 1.00–3.00

Cl2 mg/m³ 0.10–0.30

HCl mg/m³ 0.10–0.50

HF mg/m³ 0.01–0.03

O3 mg/m³ 0.05–0.10

CO mg/m³ ≤5.0


When the thickness of dust particles in the air is overly high, they will be attached on the surface of electronic components and integrated circuits, thus weakening heat dissipation ability of them. When conductive dust falls into the components, insulation performance of the components will decline, and even short-circuiting will occur.

Chemical active substance also imposes great effect on the communication equipment. For example, if acidic gas such as SO2 is overly thick in the air, the communication equipment will be rusted, leading to bad contact or short-circuiting. If CO is overly thick in the air, explosion will be caused.

1.3.6 Electromagnetic Radiation Resistance


Take proper shielding or protection measures in the equipment room to reduce interference between various devices and that from outdoor electromagnetic environment. The following specifications must be met:

1) Strength of electric field ≤130 µV/m 2) Strength of magnetic field ≤ 800 A/m


Generation of electromagnetic interference



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Electromagnetic interference may result from discharge of transmission line corona, electromagnetic radiation from transformer or high frequency switch power, waveform distortion of the power supply network caused by operations on large equipment, space radio frequency, earth’s magnetic field, and external radiation.

These interference sources interfere with the communication equipment through capacitance coupling, inductance coupling, electromagnetic wave radiation, public impedance (including grounding system), and conductive wire (including power line, signal line, and output line).

Harm on communication equipment

Electromagnetic interference directly affects the stability, reliability, and security of equipment. Electromagnetic interference can be so serious that it might lead to communication babble, blocking, error bit, interruption, or even software failure and damage to equipment.

1.3.7 Electrostatic Discharge Prevention


Take proper electrostatic discharge (ESD) prevention measures in the equipment room to suppress or reduce electrostatic discharge.

Ground the equipment reliably (the grounding resistance must be less than one ohm) to avoid accumulation of electrostatic charges. Install ESD-preventive floor, carpet, or leather carpet in the equipment room.

Take dust-proof measures in the equipment room to prevent or lessen electrostatic adsorption.

Keep the temperature and humidity in the equipment room compliant with the above-mentioned specifications.

Maintenance personnel must observe the related ESD prevention stipulations when operating on the equipment, such as wearing ESD-preventive cloths and wrist strap.


Cause for ESD in equipment room

The average capacitance in human body is about 200 pF, so electrostatic charges will be generated when you are walking, which is equivalent to the relative movement between charged bodies. The quantity of charges carried in human body depends on the material of the clothes worn, floor material, state of material surface, indoor temperature and humidity, walking speed, and so on. For example, less electrostatic charges will be generated when you wear ESD-preventive clothes than wearing clothes made of chemical fiber. Human body will generate less electrostatic charges if the floor is well grounded and the indoor humidity is high.

Harm on equipment



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The effect of ESD on the communication equipment is obvious. The instantaneous electrostatic voltage can be several thousand or more than ten thousand volts; therefore, when electrostatic charges contact with such electronic components using CMOS technique as large-scale integrated circuits, ESD will occur, which will damage the electronic components or even the equipment will fail to run normally.

As shown in the related reference, 60% of faulty boards are caused by ESD. ESD can also lead to software failures such as failure of electronic switches.

Table 1-3 Electrostatic voltage carried in human body

Situation Voltage range (volt)

Walking on insulated carpet 12000–39000

Standing on insulated ground 4000–13000

Sitting on a stool 500–3000

The following diagram shows the rising tendency of the voltage in human body within 40 seconds in three different situations. It is dangerous for human body if the voltage exceeds 12 kV.

0 Time (second)

18

16

14

12

10

8

6

4

2

Human body voltage (kV)

Standing on nonprocessed nylon floor with rubber shoes

Standing on nylon floor with rubber shoes

Standing on polypropylene floor with leather shoes

10 20 30 40

Figure 1-1 Diagram showing the relation between ESD and time

Insulating material can accumulate electrostatic charges, but conducting material cannot. Insulating material includes plastic floor, nylon and chemical fiber carpet, shoes made of leather and plastic, chemical fiber clothes, and low-humidity (dry) material. In the environment with humidity over 60%, both the floor made of semiconducting material and cement floor are good ESD-preventive material.

Table 1-4 lists the sensibility level of various components to ESD.



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Table 1-4 Sensibility level of various components to ESD

Component Voltage leading to damage (volt)

MOS (integrated circuit) 100–200

CMOS (integrated circuit) 250–2000

TTL circuit 300–1500

Field effect transistor 380–7900

Printed circuit board for multiple purposes 500

Silicon controlled thyristor 680–1000

It is shown in Figure 1-1 that when a man is walking in a room without any ESD-preventive measure taken, electrostatic charges of more than 12 kV will be generated after only 12 seconds. At this time, if the man touches any electronic equipment, the equipment might be damaged.

1.3.8 Grounding


Grounding mode: joint grounding, which means the working ground, protection ground, and lightning protection ground of the equipment share one grounding body.

Grounding resistance should be not more than one ohm. Grounding wire: Determine the cross-sectional area of various grounding wires

based on the possible maximum current load. Use conducting wire such as copper wire. Do not use bare wire.


Good grounding is one of the important measures to ensure the stable operation of the communication equipment. It is crucial in guaranteeing human safety and preventing ESD, electromagnetic interference, and lightning interference.

Routine Maintenance Guide U-SYS SoftX3000 SoftSwitch System Chapter 2 Routine Maintenance Tasks


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Chapter 2 Routine Maintenance Tasks

2.1 Daily Maintenance Tasks

Note:

The section is intended to guide skilled maintenance personnel only. If you want to know the detailed operations of specific maintenance task, refer to the related contents in U-SYS SoftX3000 SoftSwtich System Operation Manual–Basic Operations.

Necessary tools should be prepared in the equipment room, such as straight screwdrivers, crossover screwdrivers, pliers, spanners, nippers of various models, electric iron, multimeter, ESD-preventive wrist strap, and ESD-preventive brush.

Maintenance personnel need to perform daily maintenance tasks on equipment room environment, power supply system, terminal system, alarm system, billing system, equipment operation, service implementation, and traffic measurement.

2.1.1 Equipment Room Environment

Table 2-1 Daily maintenance tasks of equipment room environment

Item Maintenance guide Specifications

Temperature Observe the indication of the thermometer in the equipment room.

In normal conditions, the temperature in the equipment room should be in range of 15°C to 30°C.

If the temperature in the equipment room cannot meet the requirement for a long time, repair or replace the air conditioning system.

Humidity Observe the indication of the hygrometer in the equipment room.

In normal conditions, the relative humidity in the equipment room should be between 40% and 65%.

If the relative humidity in the equipment room is overly high, install a dehumidifying device. If the relative humidity is overly low, install a humidifying device.



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Fire prevention

Check power distribution cabinet, N68-22 cabinet, frames, and cabling trough.

There should be no hidden danger for fire in these places, and various firefighting devices are prepared.

Dust proof condition

Check the surface of floor and workbench. Check both surface and inside of cabinets.

All these places should be dust free.

Theft proof condition

Check the doors, windows, and theftproof iron net.

There should be no damage of them.

2.1.2 Power Supply System

Table 2-2 Daily maintenance tasks on power supply system


Power supply for cabinet

Check the RUN indicator of the power distribution frame of each N68-22 cabinet.

The RUN indicator (green) on the panel of the power distribution frame of each cabinet should be flashing every second, which indicates that the power supply is normal and the power distribution frame is functioning well.

If the RUN indicator flashes quickly, it means that the power supply is normal, but the communication between the service frame and the monitoring circuit board in the power distribution frame is abnormal.

Power supply for LAN Switch

Check the POWER indicators of LAN Switch 0 and LAN Switch 1.

The POWER indicator (green) on the panel of LAN Switch 0 and LAN Switch 1 should be always on, which indicates the power supply to LAN Switch is normal.

If the POWER indicator is off, it means that the power supply to LAN Switch is abnormal.

Power supply for server

Check the power switch indicators of BAM, standby iGWB, and active iGWB in turn.

If an indicator is on in green, it means that the power supply to the corresponding server is normal.

If an indicator is on in orange, it means that the corresponding server is in standby state.



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Power supply for service frame

Check the RUN indicators of all UPWR boards in the service frames.

● The RUN indicator (green) on the panel of each UPWR in all service frames should be on, which indicates the power supply to the service frame is normal.

● If the RUN indicator is off, it means that the power supply to the corresponding service frame is abnormal.

Power supply for MRS6000 frame

Check POWER indicators of all boards in the MRS6000 frame.

● The PWR indicator (green) on the panel of each SCC and MPC board in the MRS6000 frame should be on, which indicates the power supply to the MRS6000 frame is normal.

● If a PWR indicator is off, it means that the power supply to the MRS6000 frame is abnormal.

2.1.3 Terminal System

Table 2-3 Daily maintenance tasks on terminal system


Hardware operation state of BAM

Select [Start/Programs/Administrative tools/Event Viewer] on the Windows 2000 Server desktop, and then browse system logs in the [Event Viewer] window.

In normal cases, there should be no alarms in BAM about the CPU, hard disk, or network adapter.

Software operation state of BAM

Right-click the [U-SYS SoftX3000 Server] icon in the status area on the Windows 2000 Server desktop and query the operation state of various service processes of BAM.

In normal cases, all service processes of BAM should be in “Started” state instead of “Stopped” or “Exceptional” state.

Communication state of BAM

(1) Right-click the [My Network Places] icon on the Windows 2000 Server desktop, and then select [Property] on the shortcut menu.

(2) The [Network and Dial-up Connections] window is displayed. Check the connection state of each network adapter in the window.

All network adapters (except standby ones) should be in normal state. If a red X symbol appears in an icon, it means that the connection of the corresponding network adapter is broken.



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Hardware operation state of iGWB


In normal cases, there should be no alarms about the CPU, hard disk, or network adapter in either active or standby iGWB.

Software operation state of iGWB

Check the state of the little bulb in the status area on the Windows 2000 Server desktop of the active iGWB.

If the little bulb is brightened (that is, yellow rays are around the bulb), it means that the software of the active iGWB runs normally.

If the little bulb is not brightened (that is, there are no yellow rays around the bulb), it means that the software of the active iGWB does not function well or this iGWB is not in active state.

Communication state of iGWB



All network adapters (except standby ones) should be in normal state.

If a red X symbol appears in an icon, it means that the connection of the corresponding network adapter is broken.

Hardware operation state of the emergency workstation


In normal cases, there should be no alarms about the CPU, hard disk, or network adapter in the emergency workstation.

Communication state of the emergency workstation



In normal cases, except the network adapter for communicating with BAM, the other network adapters are in abnormal state, that is, a red X symbol appears in these icons, indicating the network connection is broken.



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File backup state of the emergency workstation

Check whether the bill files and database files in BAM are backed up automatically in the directories D:\Billback\ and F:\SoftX3000\ on the emergency workstation hard disk.

In normal cases, the emergency workstation can automatically back up all the files in the directories D:\ Billback\ and F:\SoftX3000\ on the BAM hard disk.

Operation state of BAM Gateway Tool

Check whether the BAM Gateway Tool runs normally on the emergency workstation.

In normal cases, the BAM Gateway Tool should start successfully, and the established connection between it and the alarm box should function well.

2.1.4 Alarm System

Table 2-4 Daily maintenance tasks on alarm system


State of power distribution frame

Check the ALARM indicator and alarm buzzer of the power distribution frame in each N68-22 cabinet.

The ALARM indicator (red) on the panel of the power distribution frame should be off and the alarm buzzer sends out no alarm.

State of the ALUI board

Check the indicators on the ALUI in each frame.

The RUN indicator should be on in green, which indicates the ALUI communicates normally with the SMUI.

Two UPWR indicators should be on in green, which indicates that the UPWR works well.

The 00–15 indicators should not be in red when it is on. If an indicator is on in green, it means that the ALUI in the corresponding slot works well. If an indicator is off, it means that the ALUI in not inserted in the corresponding slot. If an indicator is on in red, it means that the ALUI in the corresponding slot functions abnormally.

State of alarm box

Check the indicators on the alarm box and the alarm buzzer.

The alarm sound level indicators should be off, and the alarm buzzer sends out no alarm. The serial port communication indicator (green) should be on, which indicates that the alarm box communicates well with the emergency workstation.



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State of alarm console

Check carefully and confirm each alarm in the alarm console.

There should be no critical alarms in the system currently.

There should be no alarms about the power distribution frame or fan frame in the system currently.

There should be no critical alarms about gateway registration, SIP/H.323 terminal registration, MTP link, PRA link, SCCP link, SIGTRAN link, V5 interface, or trunk circuit currently.

2.1.5 Billing System

Table 2-5 Daily maintenance tasks on billing system


Bill alarm

Check on the alarm console whether there are bill alarms in the system.

Normally, there should be no bill alarms in the system, especially no major or critical alarms reporting bill pool overflow, lack of media space, or failed FTP connection with the billing center.

State of bill pool in host

Query the state of the bill pool in the host by entering the DSP BILPOL command in the MML input box on the operation & maintenance client.

Normally, the value of the fetch pointer should equal to or be smaller than that of the save pointer. If the value of the fetch pointer equals to that of the save pointer, it means that the corresponding module in the host has sent all bills to iGWB. If the value of the fetch pointer is smaller than that of the save pointer, it means that a fault occurs to the host when it is sending bills to iGWB. In this case, you need to troubleshoot and remove the fault.

Normally, the value of the backup pointer should equal to or be smaller than that of the access pointer. If the value of the backup pointer equals to that of the save pointer, it means that all the bills in the corresponding module of the host are backed up to the standby module. If the value of the backup pointer is smaller than that of the save pointer, it means that a fault occurs during backup of bills from the active module to the standby one. In this case, you need to troubleshoot and remove the fault.



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Generation of iGWB bill files

Check the bills generated on the current day in random on the client of the bill console.

Query the original bills in the navigation window on the iGWB client. Normally, the serial numbers of bill files should be continuous. Judge by experience whether the number of bills generated on the current day is less than before or not, and then take measures accordingly in time.

Query the final bills in the navigation window on the iGWB client. Normally, iGWB can automatically convert original bills to intelligent bills, CDRs, metering bills, trunk bills, and free-of-charge bills based on date.

Backup of iGWB bill files

Check the automatic backup of bill files on the dedicated bill server (non-standby iGWB).

The bill backup server can automatically back up the bill files on the active iGWB.

2.1.6 Equipment Operation

Table 2-6 Daily maintenance tasks on equipment operation


Operation of power distribution frame

In the [Management] tab of the navigation window on the operation & maintenance client, select [Device Management/Device Management] to check the POWER indicator on top of each rack.

The POWER indicator on top of each rack should be in green, which indicates that the power distribution frame functions well.

Operation of fan frames

In the [Management] tab of the navigation window on the operation & maintenance client, select [Device Management/Device Management] to check the FAN indicators in each rack.

The FAN indicators in each rack should be in green, which indicates that the fan frames function well.

If a FAN indicator is in red, it means that the corresponding fan frame runs abnormally (due to fault). In this case, you need to check this fan frame on site immediately.



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Operation of frames

In the [Management] tab of the navigation window on the operation & maintenance client, select [Device Management/Device Management] to check the state of boards (including front boards and back boards) in all frames in each rack.

Normally, the system can monitor the state of each frame. If the state of a frame is not reported, you need to check the communication between this frame and BAM.

All the boards in each frame should be displayed in green or blue, but not red.

If a subboard is installed on the FCSU, IFMI, or MRCA, the indicator of the subboard should be displayed in green.

Operation of BAM

In the [Management] tab of the navigation window on the operation & maintenance client, select [Device Management/Device Management] to check the BAM frame state in rack 0.

The BAM frame in rack 0 should be displayed in green but not red.

Operation of iGWB

In the [Management] tab of the navigation window on the operation & maintenance client, select [Device Management/Device Management] to check the iGWB frame state in rack 0.

The iGWB frame in rack 0 should be displayed in green but not red.

State of CKII clock phase-lock loop

Query the state of the clock phase-lock loop of the CKII by entering the DSP CLKPH command in the MML input box on the operation & maintenance client.

The state of the CKII clock phase-lock loop should be displayed as “locked”, which indicates that the CKII can synchronize the clock signal of upper-level clock source.

State of EPII clock

Query the clock state of all EPIIs by entering the DSP CLKSTAT command in the MML input box on the operation & maintenance client.

The clock state of each EPII should be displayed as “normal”, which indicates that the EPII can synchronize the clock signal of the CKII.

State of FE port

Query the state of FE ports by entering the DSP PORT command in the MML input box on the operation & maintenance client.

The state of all FE ports (service network ports, not internal network ports) should be displayed as “normal”.

State of E1 port

Query the state of E1 ports by entering the DSP PORT command in the MML input box on the operation & maintenance client.

The state of all E1 ports should be displayed as “normal”



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CPU usage

Query the CPU usage of each module by entering the DSP CPUR command in the MML input box on the operation & maintenance client.

The CPU usage of each module should be under 80%.

Dual-homing state

Query the dual-homing state by entering the DSP DHSTA command in the MML input box on the operation & maintenance client.

Normally, the local SoftX3000 should be in “mutual-assistant inactive state”, and the heartbeat link should be in normal state.

Note:

To improve efficiency, it is suggested to compile a script file containing all the MML commands needed for daily maintenance. In this way, you can execute all MML commands in batch by running this script file.

2.1.7 Service Implementation

Table 2-7 Daily maintenance tasks on service implementation


AG registration

(1) In the [Monitor] tab of the navigation window on the operation & maintenance client, select [Maintain Management/Gateway Status]. The [Query Setting] dialog box is displayed.

(2) Enter “*” in the [EID] field. Select “AG” for the [GW Type] field. Click <Query> to query.

Normally, all AGs are registered successfully.

TG registration


(2) Enter “*” in the [EID] field. Select “TG” for the [GW Type] field. Click <Query> to query.

Normally, all TGs are registered successfully.



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UMG registration


(2) Enter “*” in the [EID] field. Select “UMG” for the [GW Type] field. Click <Query> to query.

Normally, all UMGs are registered successfully.

Trunk circuit

(1) Query the state of trunk circuits by entering the DSP OFTK command in the MML input box on the operation & maintenance client.

(2) If the local office has many office directions, it is suggested to spot-check the trunk circuits of important office directions.

Normally, there should be no blocked, faulty, or unknown trunk circuits in any office direction.

2.1.8 Traffic Measurement

Table 2-8 Daily maintenance tasks on traffic measurement


Traffic measurement tasks

Select [Task/Query Task] on the console to check whether the traffic measurement tasks in the host are being executed normally.

All measurement tasks are active.

Traffic measurement results

Select [Task/Query Task Result] on the console. Select the more important registered traffic measurement tasks and the measurement time segment of the current day for query.

The results of the traffic measurement tasks should conform to the actual situation. If not, analyze the specific cause.

Note:

For detailed operations about traffic measurement, refer to U-SYS SoftX3000 SoftSwitch System Operation Manual-Traffic Measurement.



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2.2 Monthly Maintenance Tasks

Maintenance personnel need to perform the following monthly maintenance tasks on cabinets, terminal system, and spare parts.

2.2.1 Cabinets

Table 2-9 Monthly maintenance tasks on cabinets


Power supply system

(1) Check whether the power input and output terminal blocks of the power distribution frame in each cabinet are loosely contacted, damaged, or eroded, and whether overcurrent or overtermperature occurs in them.

(2) Check whether the power input terminal blocks, power connectors and sockets of various components in each cabinet are loosely contacted, damaged, or eroded, and whether overcurrent or overtermprature occurs in them.

(3) Use multimeter to measure the input and output voltage of the power distribution frame.

All the connecting points should be firm and reliable, and no erosion should be found.

No equipment is deformed, and the contacting positions of power switches should not be heat for long.

Normally, the voltage should be –48 V, and the allowed variation range is from –57 V to –40 V.

Cables

Check whether the power cables, grounding cables, and signal cables in the cabinet are damaged, aged, eroded, or burned by electrical arc.

All cables should be in good condition.

Grounding system

(1) Check whether the connecting terminals and captive screws of all grounding cables in the cabinet are connected firmly and no erosion occurs to them.

(2) Measure the grounding resistance in the equipment room with the earth resistance tester. Refer to the related contents in Chapter 5 for the measurement method.

All the connecting points should be firm and reliable, and no erosion should be found.

The grounding resistance should be not more than one ohm.



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Protection system

(1) Check whether no foreign object is attached on top of a cabinet or fall into the cabinet.

(2) Check whether the rodent-proof nets at the exits of signal cables on top or bottom of each cabinet are wrapped and bundled well and not damaged.

There should be no foreign object inside a cabinet or attached on top of it.

All rodent-proof nets should be bundled well and no damage can be found.

Dust-proof system

(1) Wipe the surface of the cabinet with clean and dry cloth made of cotton yarn. Clean the area around the air inlets at the bottom of the cabinet with a vacuum cleaner.

(2) Remove the air filter frame at the bottom of the cabinet. Wash it with water. After airing it, install it back. Refer to 3.2.1 of this manual for the detailed operations.

(3) Remove the air filter gauze inside the front door of the cabinet. Wash it with water. After airing it, install it back. Refer to 3.2.2 of this manual for the detailed operations.

There should be no dust on the surface of the cabinet and around the air inlets at the bottom of the cabinet.

The air filter frame and gauze should be clean.



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2.2.2 Terminal System

Table 2-10 Monthly maintenance tasks on terminal system


Operator password

(1) The system administrator should audit all the operator accounts, operator authorities, and workstation authorities defined by the terminal system (BAM) once a month, and modify the system administrator password periodically.

(2) Modify the BAM system administrator password at least once a month. The password should be no less than 6 characters.

(3) After modifying the BAM system administrator password, be sure to modify the information for auto-login to Windows 2000 Server on BAM through the application software U-SYS SoftX3000 Autologin Tool.

The operator accounts, operator authorities, and workstation authorities should be set in accordance you’re your maintenance regulations.

For the operations on modifying the information for auto-login to Windows 2000 Server, refer to U-SYS SoftX3000 SoftSwitch System Software Installation Manual.

BAM system time

(1) On the Windows 2000 Server desktop, double-click the time in the time area. The [Date/Time Properties] dialog box is displayed. Check and adjust the BAM system time.

(2) Because the adjustment of the BAM system time will affect bills greatly, it is strongly recommended to adjust the system time at night when traffic is low, for example, 2:00–4:00 p.m.

If BAM is not synchronized with the time server (that is, NTP server), you need to check and adjust the BAM system time periodically.

The BAM system time should be consistent with the local standard time.

iGWB system time

On the Windows 2000 Server desktop, double-click the time in the time area. The [Date/Time Properties] dialog box is displayed. Check and adjust the BAM system time.

The system time in both active and standby iGWB should be consistent with the local standard time.

Emergency workstation time

On the Windows 2000 Server desktop, double-click the time in the time area. The [Date/Time Properties] dialog box is displayed. Check and adjust the BAM system time.

The emergency workstation system time should be consistent with the local standard time.



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Backup of BAM database

(1) Check whether all the BAM database files named BamYYYYMMDD.dat and BamMonthBak.dat in the directory F:\SoftX3000 on the emergency workstation are the same as those in the directory F:\SoftX3000 on BAM.

(2) Copy all the BAM database files in the directory F:\SoftX3000 to the magnetic optical disk (MO) in the MO drive. Use several MOs if one is not enough.

The MO(s) storing system database files cannot be used for other purposes.

To facilitate maintenance, you should mark the backup date on the MO label.

To reduce data loss caused by MO damage, you should store the database files with different backup dates in different MOs.

MOs are rewritable, but each MO must be kept for at least one quarter.

BAM hard disk space

Check the free space of partitions C, D, E, and F periodically, and then delete the junk and outdated data based on the BAM directory structure as described in U-SYS SoftX3000 SoftSwitch System Software Installation Manual.

Normally, the free space of each partition in the BAM hard disk should be over 50% of the total capacity of that partition.

2.2.3 Spare Parts

Table 2-11 Monthly maintenance tasks on spare parts


Storage of spare parts

Check the environment conditions in the spare parts warehouse periodically, such as fire protection, dampproof, dustproof, antimagnetic, ventilation, and shockproof conditions.

All conditions should conform to the requirements on storage environment presented in U-SYS SoftX3000 SoftSwithc System Technical Manual-System Description.

Quantity of spare parts

Check whether the types and quantity of the spare parts meet the maintenance demand.

According to the hardware configuration, at least one backup board should be configured for each kind of board. The UPWR (power board) should be configured with at least two backup boards.

There should be at least one backup fan frame and two backup SCSI hard disks (36 GB and 72 GB respectively).

All spare parts should be stored well without any damage or erosion. Damaged or replaced parts should be repaired in time.



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2.3 Yearly Maintenance Tasks

Note:

The yearly maintenance tasks listed in this section are all major tasks. Refer to Chapter 4 of this manual for the detailed operations.

Maintenance personnel need to perform the following yearly maintenance tasks on cabinet components. See Table 2-12 for the detailed maintenance items.

Table 2-12 Monthly maintenance tasks on cabinet components


Cleaning of fan frame

(1) Wipe the dust from fan blades and circuit boards in the backup fan frame with clean cloth made of cotton yarn, ESD-preventive soft brush, and vacuum cleaner.

(2) Replace a fan frame in the rack with the backup one. Be sure to complete the replacement within five minutes.

(3) Wipe the dust from the replaced fan frame in the same way as described in the first step. After being cleaned, the replaced fan frame serves as a backup one.

(4) Replace the other fan frames in the rack and then clean them one by one in the same manner.

All fan frames should be dust free.

Cleaning of air deflector

Remove the air deflector from the rack, and then wipe the dust from it with clean cloth made of cotton yarn, ESD-preventive soft brush, and vacuum cleaner. (1) Install the cleaned air deflector back into

the rack. (2) Clean the other air deflectors in the rack

in the same manner.

All air deflectors should be dust free.

Cleaning of boards

It is suggested to clean the boards once every two years. For the detailed operations on cleaning boards, refer to 3.2.5 of this manual.

All boards should be dust free.

Routine Maintenance Guide U-SYS SoftX3000 SoftSwitch System Chapter 3 Major Maintenance Operations


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Chapter 3 Major Maintenance Operations

3.1 Maintaining Grounding System

3.1.1 Checking Grounding System

Good grounding is one of important measures to ensure the stable operation of SoftX3000. It can protect maintenance personnel against electric shock and protect equipment against ESD interference, electromagnetic interference, and lightning strike. Therefore, be sure to check the grounding system of SoftX3000 at regular intervals (once a month is suggested).

I. Introduction to grounding system

SoftX3000 adopts joint grounding, that is, working ground (GND), protection ground (PGND), and backhaul ground (BGND) share one grounding body, the grounding cables of all cabinets are connected firmly to form an equipotential system. Depending on the installation or connecting positions, the grounding cables (in olivine normally) of SoftX3000 are classified as the following:

Table 3-1 List of grounding cables of SoftX3000

Installation or connecting position Description

Between a cabinet and the grounding system

The grounding cable of a cabinet is connected from the grounding terminal of the power distribution frame to the grounding copper busbar of the DC power distribution cabinet.

Between two cabinets The grounding cables between two cabinets are connected from the grounding copper busbar of cabinet A to that of cabinet B.

The grounding cable of the power distribution frame is connected from the power distribution frame to the grounding copper busbar.

The grounding cable of the service frame is connected from a service frame to the grounding copper busbar.

The grounding cable of KVM/LCD is connected from KVM/LCD to the grounding copper busbar.

The grounding cable of LAN Switch is connected from LAN Switch to the grounding copper busbar.

Between components in a cabinet and the grounding copper busbar of the cabinet

The grounding cable of the server is connected from a server to the grounding copper busbar.



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Installation or connecting position Description

The grounding cable of the MRS6000 frame is connected from the MRS6000 frame to the grounding copper busbar.Between components

in a cabinet and the grounding copper busbar of the cabine

The grounding cables of the cabinet are connected from the door, top cover, and bottom of a cabinet to the grounding copper busbar.

Outside a cabinet The grounding cables of peripheral equipment are connected from the alarm box, emergency workstation, or other equipment to the grounding system.

II. Checking grounding system

1) Check whether the grounding cables in a cabinet are damaged, aged, eroded, or burned by electrical arc.

2) Check whether the connecting terminals and captive screws of all grounding cables in the cabinet are connected firmly and no erosion occurs to them.

3) Use a multimeter to test whether all components in a cabinet are well grounded. Adjust the multimeter to the ohm range, connect one probe to a fixed grounding point in the equipment room (lengthen the probe cable if it is not long enough), and then use the other probe to measure the grounding points in the cabinet one by one. In view of the measurement precision of the multimeter, the resistance measured at each grounding point should be about one ohm. If the resistance measured at a grounding point is more than one ohm apparently, check the grounding cable, grounding terminal, and captive screw of this grounding point immediately, and then take appropriate measures accordingly.

4) Use an earth resistance tester to measure the grounding resistance of the grounding network in the equipment room. The grounding resistance should be not more than one ohm. Refer to 3.1.2 for the detailed measurement method.

III. Definitions of PGND, BGND, and GND

PGND: the protection ground for cabinets and metal cases of various devices in a cabinet.

BGND: the backhaul ground for DC power supply of cabinets. Generally, the positive pole of –48 VDC power is grounded in the power distribution cabinet.

GND: the working ground for circuits in various devices in a cabinet. It is the joint name for the digital ground and analog ground of boards and backplane.

3.1.2 Measuring Grounding Resistance

I. Measurement method

It is recommended to use the earth resistance tester to measure the grounding resistance of the grounding network in the equipment room. Place the voltage pole and



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current pole of the earth resistance tester in a manner as shown in Figure 3-1 during measurement.

D

d2

d1

Voltage pole Current pole

Grounding network Measurement point

Figure 3-1 Layout of poles of earth resistance tester

The current pole is distanced from the edge of the grounding network with d1, which is four to five times of the maximum diagonal length (D) of the grounding network.

The voltage pole is distanced from the edge of the grounding network with d2, which is 50% to 60% of the distance d1 between the current pole and the grounding network.

When measuring the resistance, move the voltage pole three times along the line between the current pole and the grounding network. The distance moved each time is 5% of d1. If the resistance values measured for three times are relatively close, take the average value of these three values as the grounding resistance of the grounding network.

If d1 cannot be four to five times of D, set d1 to 2D and d2 to D in areas with relatively even earth resistance rate, and set d1 to 3D and d2 to 1.7D in areas with uneven earth resistance rate.

II. Cautions

Place the current pole and voltage pole vertical to the line or underground metal pipe.

Do not measure the grounding resistance immediately after rain.

3.2 Removing Dust from Equipment

3.2.1 Cleaning Air Filter Frame

The air filter frame is located at the bottom of an N68-22 cabinet, responsible for filtering the wind entering the frame at the bottom of the cabinet for heat dissipation purposes. During the operation of the equipment, the dust in the air will be attached on the air filter frame. The accumulated dust will deteriorate the wind penetration capability



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through the air filter frame, thus affecting heat dissipation efficiency and equipment stability.

To ensure long-term stability of the equipment, be sure to clean the air filter frame of each cabinet periodically (once a month is recommended). Proceed as follows:

I. Removing an air filter frame out of a cabinet

1) Open the front door of an N68-22 cabinet to wider than 120 degree. 2) Unscrew the two screws fixing the air filter frame at the bottom of the front side

posts of the cabinet with a crossover screwdriver. 3) Hold the panel of the air filter frame with both hands. 4) Uplift the air filter frame slightly to make its panel higher than the screws fastening

the grounding cables at the bottom of the cabinet. 5) Pull the air filter frame slowly out of the cabinet.

Caution:

Before removing the air-filter, open the door to over 120 degree before removing door mounted filters. This is to prevent the dust on the filter from contaminating the cabinet.

II. Washing the air filter frame

1) Wash the air filter frame with water. 2) Dry it with clean cloth. 3) Finally, air it in a ventilating place.

Caution:

Do not insert the wet air filter frame into the cabinet; otherwise, the equipment will be damaged due to short-circuit occurring after water is absorbed into the cabinet.

III. Installing the air filter frame back into the cabinet

1) Push the cleaned air filter frame aslant and downward along the guide rails into the cabinet. Do not push it forcedly.

2) After positioning the air filter frame, use a crossover screwdriver to screw the two screws used for fixing the air filter frame into the side posts of the cabinet.



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3.2.2 Cleaning Air Filter Gauze

The air filter gauze is located at the inner side of the front door of an N68-22 cabinet, responsible for filtering the wind entering the cabinet for heat dissipation purposes. During the operation of the equipment, the dust in the air will be attached on the air filter gauze. The accumulated dust will deteriorate the wind penetration capability through the air filter gauze, thus affecting heat dissipation efficiency and equipment stability.

To ensure long-term stability of the equipment, be sure to clean the air filter gauze of each cabinet periodically (once a month is recommended). Proceed as follows:

I. Removing the air filter gauze out of the front door

1) Open the front door of an N68-22 cabinet. You can see a layer of black network gauze attached at the inner side of the front door.

2) Rip the air filter gauze out of the front door with the help of a ladder.

II. Washing the air filter gauze

1) Rub the metal wall at the inner side of the front door with clean and dry cloth made of cotton yarn.

2) Wash the air filter gauze with water. 3) Dry it with a spin-drier. 4) Finally, air it in a ventilating place.

Caution:

Do not install the wet air filter gauze back to the front door; otherwise, the equipment will be damaged due to short-circuit occurring after water is absorbed into the cabinet.

III. Installing the air filter gauze back into the front door

Stick the cleaned air filter gauze onto the inner side of the front door with the help of a ladder.

3.2.3 Cleaning Fan Frame

As a part of a service frame, the fan frame is located at the bottom of the service frame, functioning in providing drive for heat dissipation in the service frame. During equipment operation, dust will be attached on fan blades and circuit boards in the fan frame. The accumulated dust will affect the operation of the fan frame and even the service frame, thus menacing the stability of the equipment.



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To ensure long-term stability of the equipment, be sure to clean each fan frame of each cabinet periodically (once a year is recommended). Proceed as follows:

I. Wiping the dust from a backup fan frame

Wipe the dust off the fan blades and circuit boards in the backup fan frame with clean cotton yarn cloth, ESD-preventive soft brush, and vacuum cleaner. After being cleaned, the fan frame should be dust free.

II. Replacing the fan frame to be cleaned with the backup one

1) Open the front door of an N68-22 cabinet. 2) Use a cross screwdriver to unscrew the two screws fixing the fan frame. 3) Pull the fan frame out of the service frame slowly. 4) Install the cleaned backup fan frame into the service frame quickly. 5) Screw the two screws fixing the fan frame into the side posts of the service frame

with a crossover screwdriver.

Caution:

Be sure to complete the replacement of a fan frame within five minutes; otherwise, the security and stability of the service frame will be affected fatally.

III. Cleaning the replaced fan frame

Wipe the dust off the fan blades and circuit boards in the replaced fan frame with clean cotton yarn cloth, ESD-preventive soft brush, and vacuum cleaner. After being cleaned, this fan frame serves as the backup one.

IV. Cleaning the other fan frames

Replace and clean the other fan frames in turn according to steps 2 and 3 until all of them are cleaned.

3.2.4 Cleaning Air Deflector

In an N68-22 cabinet, except the service frame installed at the bottom, the other service frames are equipped with an air deflector at the bottom of themselves. An air deflector functions as a channel for sending wind to the above service frame for heat dissipation purposes. During the operation of the equipment, the dust in the air will be attached on the air deflectors. The accumulated dust will affect the performance of the service frames and even equipment stability.



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To ensure long-term stability of the equipment, be sure to clean each air deflector periodically (once a year is recommended). Proceed as follows:

I. Removing an air deflector out of a cabinet

1) Open the front door of an N68-22 cabinet. 2) Unscrew the four screws fixing the air deflector on the front side posts of the

cabinet with a crossover screwdriver. 3) Pull the air deflector out of the cabinet slowly.

II. Wiping dust from the air deflector

Wipe the dust off the air deflector with clean cotton yarn cloth, ESD-preventive soft brush, and vacuum cleaner. After being cleaned, this air deflector should be dust free.

III. Installing the air deflector back into the cabinet

1) Install the cleaned air deflector into the cabinet. 2) Use a crossover screwdriver to screw the four screws for fixing the air deflector

into the side posts of the cabinet

3.2.5 Cleaning Board

Caution:

To reduce maintenance risks, be sure to clean the boards during the time period with light traffic, for example, 2:00–4:00.

During the operation of the equipment, the charged ions or dust in the air will be attached on the boards due to their electrical feature and cross-ventilation during heat dissipation of the equipment. The attachment will be more powerful if the air is less pure and the relative humidity is lower. The accumulated dust will affect the heat dissipation and insulation performance of the boards fatally, thus menacing the equipment stability. To ensure long-term stability of the equipment, be sure to clean all boards in a cabinet periodically (once every two years is recommended). Proceed as follows:

I. Preparing backup boards

Before cleaning all the boards in a service frame, prepare a backup board for each type of board in the frame first. Suppose a service frame is inserted with the following boards, as shown in Figure 3-2.



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IFM I

IFM I

CDB I

CDB I

FCCU

FCCU

SMU I

SMU I

BSG I

BSG I

MSG I

MSG I

FCSU

FCSU

ALU I

UPWR

UPWR

Front boards

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

EP I I

EP I I

S IU I

S IU I

UPWR

UPWR

Back boardsCK I I

CK I I

BF I I

BF I I

HSC I

HSC I

Figure 3-2 Configuration of boards in a service frame

As shown in the figure, you need to prepare the backup boards for the IFMI, BFII, FCCU, FCSU, EPII, SMUI, SIUI, HSCI, BSGI, MSGI, CDBI, CKII, ALUI, and UPWR.

II. Replacing a board to be cleaned

To avoid faults during maintenance, you must replace the board to be cleaned with a backup board according to the board replacement flow strictly. You can proceed to clean the placed board only after the backup board runs normally. For the board replacement flow, refer to U-SYS SoftX3000 SoftSwitch System Maintenance Manual-Part Replacement.

III. Removing dust from boards

You can clean the boards in several ways. The principal principle of these methods is to prevent the physical and electrical characteristics of the boards from being damaged. This manual describes two commonly used methods.

Use of a vacuum cleaner

Use a clean and dry ESD-preventive soft brush to slightly wipe the dust off the board surface, and at the same time point the suction nozzle of a vacuum cleaner at the brush to suck.

Use of a vacuum cleaner is simple in operation and cheap in cost, but it fails to remove the harmful gas absorbed on the board surface.

Use of cleaning agent

Use the dedicated anhydrous, nonerosive, nonconductive, and high-volatility cleaning agent to clean the boards, for example, isopropanol (IPA).

Cleaning agent can not only remove the dust from the boards completely, but also remove most of the harmful gas absorbed on the surface of the boards. However, this method is relatively complicated in operations and high in cost.



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Caution:

ESD-preventive measures must be taken strictly during the operation. For example, be sure to wear ESD-preventive clothes and wrist strap when operating on the ESD-preventive workstation.

Select the cleaning agent according to the related national standards strictly; otherwise, boards may be damaged.

IV. Cleaning the boards in turn

Restricted by the quantity of spare parts, it is impossible to replace all the boards to be cleaned in one time. In this case, you can replace a board to be cleaned with the already cleaned one of the same type.

Caution:

Because the settings of the DIP switch S3 are different when the SIUI is inserted in different frames, be sure to check whether the settings of S3 are the same as the original one before replacing the SIUI.

Routine Maintenance Guide U-SYS SoftX3000 SoftSwitch System Chapter 4 Guide to Dangerous Operations


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Chapter 4 Guide to Dangerous Operations

4.1 Dangerous Operations on Hardware

4.1.1 Dangerous Operations on Boards

Table 4-1 Dangerous operations on boards

Maintenance guidance Possible consequence of maloperation

It is strictly forbidden to pull out two or more than two UPWR boards in one frame concurrently.

When a frame is fully loaded with service boards, pulling out two or more than two UPWR boards concurrently will overload or even burn out the UPWR boards that are supplying the power in the frame.

It is strictly forbidden to insert different types of UPWR boards in one frame.

There are two types of UPWR boards, a and b. When replacing the UPWR, if you insert different types of UPWR in one frame, it will cause unbalanced current between various UPWRs. The UPWR with higher current will be overloaded or even burned out.

It is strictly forbidden to pull out the active board online.

When the standby board is working normally, after pulling out the active board online, although the system will implement changeover automatically, the newest data on the active board cannot be fully backed up onto the standby board automatically because the data synchronization between the active board and standby board takes some time. In this case, call drop or bill loss might occur. When the standby board is abnormal, pulling out the active board online will interrupt the service process of related module and block the traffic partially or globally.

It is strictly forbidden to press the <Reset> button on the panel of the board unless necessary.

After pressing the “Reset” button on the panel of the board, the board will be forced to execute hardware reset, which can only be executed by the expert when severe faults occurs to the system”. . Pressing the “Reset” button on the panel of the board by maloperation will reset the active board, which has the same consequence as “pulling out the active board online”



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It is strictly forbidden to press the bottom red barring switch on the front panel of the board unless necessary

After pressing the bottom barring switch on the front panel of the board, the bottom barring switch will touch the tact switch on the board, making the board offline. Now if you close and lock the bottom front panel, the board will be reloaded. Pressing the barring switch on the bottom front panel of the active board by maloperation will make the active board offline, which has the same consequence as “pulling out the active board online”

It is strictly forbidden to connect the serial port cable to the debug serial port for debugging.

Only the engineers from Huawei Technologies Co., Ltd. Can use the debug serial port of the board. It is dangerous for you to use the debug serial port because it might lower the board efficiency or reset the board.

It is strictly forbidden to insert or pull out the board without wearing the antistatic wrist strap

The static electricity on the human body is harmful to the electronic components of the board. The board is easily harmed by the static electricity if you insert or pull out the board without wearing the antistatic wrist strap. The static hazard can damage the board or cause unstable running of the board.

4.1.2 Dangerous Operations on Cables

Table 4-2 Dangerous Operations on Cables


It is strictly forbidden to plug and unplug the network cable inside the cabinet unless necessary.

The network cable connections inside the cabinet are mainly used to implement the communications between the frames and between the host and the BAM. Plugging and unplugging the network cables unnecessarily will cause interruption of the frame service and communication between the foreground and the background.

It is strictly forbidden to concurrently unplug the two network cables connecting the active IFMI board to the standby IFMI board.

The IFMI provides IP signaling interface for SoftX3000. Each pair of active and standby IFMI boards bear lots of signaling traffic. If you unplug the two network cables connecting the active IFMI and the standby IFMI, the majority of the traffic or global traffic will be blocked.



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It is strictly forbidden to connect the network cables between the emergency workstation and the two LAN Switches in the integrated configuration cabinet when the BAM is working normally.

The emergency workstation is the hardware backup device for the BAM. The IP address of the network card connecting the emergency workstation to 0#LAN Switch and 1#LAN Switch is the same as that of the network card corresponding to the BAM.Under normal circumstances, it is necessary to unplug the network cables between the emergency workstation and the two LAN Switches in the Integrated configuration cabinet. Otherwise, it will cause address collision, making the BAM ineffective or breakdown.

4.1.3 Dangerous Operations on Power

Table 4-3 Dangerous operations on power


It is strictly forbidden to handle the power switches in the power distribution frame of the cabinet unless necessary.

It is strictly forbidden to handle the power switches on the servers such as the BAM and the iGWB unless necessary

It is strictly forbidden to handle the power switches on 0#LAN Switch and 1#LAN Switch of the integrated configuration cabinet unless necessary.

Only when upgrading, expansion, replacing the components or major fault occurs can you handle various power switches according to the operation instruction. If you handle the power switches unnecessarily, it will cause breakdown of the devices, bill loss and out of service.

4.2 Dangerous Operations on Software

4.2.1 Overview of Dangerous Operations on Software

Dangerous operations on software refer to various dangerous operations on the BAM. The contents of this section also apply to the emergency workstation when it replaces the BAM temporarily.



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4.2.2 Dangerous Operations on Files of BAM and iGWB

Table 4-4 Operations on the files in the hard disk of the BAM and iGWB


It is strictly forbidden to modify the file directory structure or file name in the hard disk of the BAM and iGWB.

It is strictly forbidden to modify the configuration files (with the suffix being .ini) in the hard disk of the BAM and iGWB.

It will cause the abnormal running of the BAM and iGWB or even system breakdown.

4.2.3 Dangerous Operations on Windows 2000 Server

Table 4-5 Dangerous Operations on Windows 2000 Server


It is strictly forbidden to stop any service process in the Windows 2000 Server unless necessary.

The BAM is the core component of the SoftX3000 terminal system. The service processes running on the BAM have specific purposes. If you stop any service process unnecessarily, it will cause malfunction or breakdown of the BAM.

It is strictly forbidden to close the “BAM Service” process in the Windows service process.

The “BAM Service” process is used to monitor the running of the “BAM Manager” in real time. When the "BAM Manager” runs abnormally, the “BAM Service” will restart the BAM automatically to recover normal running of the "BAM Manager” . If you close the “BAM Service” process, when the “BAM Manager” runs abnormally, you must reset the BAM manually for recovery. This increases the workload of maintenance and can cause magnification of the BAM failure easily.

It is strictly forbidden to close the “Smirror” process in the Windows service process.

The “Smirror” service process is used for the emergency workstation to synchronously back up the files under the specified directory of the BAM hard disk. If any “Smirror” service process in the BAM or the emergency workstation is closed, the emergency workstation will not be able to synchronously back up the files under the specified directory of the BAM hard disk.



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4.2.4 Dangerous Operations on BAM Manager

Table 4-6 Dangerous Operations on BAM Manager


It is strictly forbidden to close the “BAM Manager” program.

The “BAM Manager” program is an important component of the BAM server software. Closing the “BAM Manager” program will interrupt the communication between the foreground and the background, which is equivalent to BAM breakdown.

It is strictly forbidden to stop any service process in the “BAM Manager” unless necessary.

The “BAM Manager” contains several service processes such as Warn, DataMan, Bill, Maintain, MML, and Exchange. These service processes are used to implement different software functions. The statuses of these processes should be “Started” under normal circumstances. If you stop a service process (the status of which changes to "Stopped"), the functions of this service process will be disabled, which will cause BAM failure.

It is strictly forbidden to stop the real-time monitoring program in the “BAM Manager”.

There is a button on the toolbar of the “BAM Manager” program window. It is the real-time monitoring program button in the “BAM Manager”. When it is started normally, it will be concave. This monitoring program is used to monitor the running of various service processes in the “BAM Manager” in real time. If a service process exits abnormally, the SoftX3000 will restart it through the monitoring program to ensure normal running of the “BAM Manager”. If you stop the monitoring program accidentally by clicking the corresponding button to make it protuberant, when a service process in the BAM Manager exits abnormally, you must restart the BAM manually. This increases the maintenance workload and will cause more serious problems of the BAM.

4.3 Dangerous Operations on Commands

4.3.1 Overview of Dangerous Operations on Commands



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Caution:

Only the trained maintenance engineers are allowed to execute the dangerous MML commands. Use the LST type commands to query and record the original system configuration before executing the MOD and SET type commands to modify the configuration data. When the modification fails, change back to the original configuration and consult the Technical Support Department of Huawei Technologies Co., Ltd.

4.3.2 Dangerous Operations on System Management Commands

Table 4-7 Dangerous Operations on system management commands

Command name

Command function Possible consequence of maloperation

MOD MAXT

Modifying maximum tuple number

If the maximum tuple number is set improperly, some boards might not be able to load data or repeatedly trying to load data. The board becomes abnormal.

MOD PUBPRM

Modifying public parameter

If the public parameter is set improperly, some boards might not be able to load data or repeatedly trying to load data. The board becomes abnormal.

MOD MPRM

Modifying module parameter

If the module parameter is set improperly, some boards might not be able to load data or repeatedly trying to load data. The board becomes abnormal.

MOD FSFP

Modifying fixed software parameter

Because the software parameters are widely used and referenced in many other commands and parameters, and each bit has its specific meaning, an incorrect configuration in software parameter will result in abnormalities in multiple functions.

MOD ITIMER

Modifying internal timer value

This command is only used by the professional engineer during deployment or upgrading. Otherwise, it will cause a series of severe unpredictable consequences

SET DHWM

Setting dual-homing work mode

Be cautious when using this command. If you incorrectly set the dual-homing mode, it will cause system faults such as inactivation of dual-homing and forced switchover of dual-homing.

RMV PATCH Remove patch

The patch is usually integrated into other components. Some patches are important to the stable running of the system. If you remove a patch by mistake, it will affect a specific function of the system, and even harm the stable running of the system.



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Command name


DEA PATCH

Deactivate patch Same as above

SET TIME Set system time

Be cautious when using this command because setting the system time will affect the accuracy of interim charge settlement. It is recommended to use this command when the traffic is low.

4.3.3 Dangerous Operations on Equipment Management Commands

Table 4-8 Dangerous Operations on equipment management commands

Command name


RST BRD Resetting board

Be cautious when using this command. Do not use this command when the standby board of the reset board is faulty, offline or in the backup process. Otherwise, it will fully interrupt the traffic of related modules. Under such circumstances, if you reset a CDBI or IFMI, the global traffic will be blocked.

RST FRM Resetting frame

This command is only used by the professional engineer during deployment or upgrading. Incorrect operation will result in the blocking of service in the entire frame, or even the blocking of global service.

RST MDU Resetting module

Be cautious to use this command when executing level-3 reset or level-4 reset. It might block some or even all calls of the entire office.

MOD LSS Modifying soft switch of board loading

Be cautious when using this command. If the setting of the soft switch of board loading is invalid, it will change the board loading strategy and possibly hinder the quick-recovery mechanism when accidents happen.

MOD FECFG

Modifying FE port configuration

Be cautious when using this command. After the FE port configuration is modified, you must reset the IFMI, BSGI, MSGI and MRCAI boards manually to make the modification become effective. Therefore, it will affect the running of the system greatly. Generally, it will interrupt the service.

RMV CDBFUNC

Removing CDB function

If you remove the CDB function data by mistake, you might have disabled some CDB functions. For instance, you might not be able to locate a subscriber, or hunt a trunk. This can block the traffic fully.

SET CPUTHD

Setting CPU threshold

The command is used to set the overloading control mechanism of the system. Incorrect setting will affect the strategy of call barring on overloading and overload recovery.



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Command name


SET CKICFG

Setting CKII clock configuration

The command defines the important information such as the input port location and signal type of the clock signal reference source obtained by the CKII. If you set the CKII clock configuration data incorrectly, the CKII will not be able to synchronize the upper level clock.

SET CLKSRC

Setting clock reference source of EPII

If you set the clock reference source of EPII incorrectly, the EPII in the corresponding frame will not be able to get the clock source and synchronize the system.

RMV IGWB

Removing iGWB

If you remove the iGWB by mistake, the host of the SoftX3000 will not be able to send bills to the iGWB. When the bill pool is overflowed, bill loss will happen

4.3.4 Dangerous Operations on Local Office Information Management

Table 4-9 Dangerous Operations on local office information management

Command name


SET OFI Setting local office information

The command defines the important information such as the signaling point code of the local office and the signaling network structure. Setting these information incorrectly will cause abnormal interworking between the SoftX3000 and SS7 network.

MOD CALLSRC

Modifying call source code

This command defines the important information such as the number of pre-received digits, local dialed number (DN) set, and routing selection source code of the call source. Modifying the call source data incorrectly will cause abnormal call from the call source (local office subscriber and incoming trunk).

MOD LDNSET

Modifying local DN set

When you incorrectly set the Digit map of the local DN set, calls through the gateway using the local DN set will become abnormal.



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4.3.5 Dangerous Operations on Charging Data Management

Table 4-10 Dangerous Operations on charging data management

Command name


MOD CHGANA

Modifying charging case analysis

This command defines the important information such as the payer, charging method and meter table number during charging. Modifying the charging case data incorrectly will cause abnormal charging.

MOD CHGMODE

Modifying charging mode

This command defines the important information such as meter mode and charging rate. Modifying the charging mode data incorrectly will cause abnormality to the meter table bill and instant charging.

MOD CHGGRP

Modifying intra-office group charging

Incorrect data will cause wrong charging results.

MOD CHGIDX

Modifying charging case index

Incorrect data will cause wrong charging results or bill loss.

MOD CHGNUM

Modifying charging number

Modifying the charging number incorrectly will change the charging number on the bill and cause charging confusion.

RMV CHGCX

Removing Centrex intra-group charging

When it is necessary to charge the Centrex intra-group call, if you remove the Centrex intra-group charging data by mistake, the system will not be able to charge the Centrex intra-group call.

4.3.6 Dangerous Operations on Gateway Management Commands

Table 4-11 Dangerous Operations on gateway management commands

Command name


DEA MGW

Deactivating media gateway

If you deactivate the wrong media gateway, all traffic through the media gateway will be blocked.

URG GW

Deregister Softswitch (gateway) from an external gatekeeper

Executing this command will block all the gateway traffic borne by SoftX3000 in the traditional H.323 network.

BLK TRM Blocking termination

If you block the wrong termination, all traffic through the termination will be blocked.



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Command name


RMV MRSRT

Removing MRS route

When the system uses the MRS6000 as the media resource server (MRS), If you remove the MRS route by mistake, the SoftX3000 will be unable to play the tone and collect the digit. It will also cause supplementary service and intelligent service unavailable.

RMV TONEID

Removing mapping between tone ID and tone file

If you remove the mapping between tone ID and tone file by mistake, corresponding service will play the tone abnormally.

4.3.7 Dangerous Operations on Signaling and Protocol Commands

Table 4-12 Dangerous Operations on signaling and protocols Management commands

Command name


RMV STUNDISP

Removing STUN protocol dispatch

When there are multiple IFMI boards, the SoftX3000 can only use one IFMI to dispatch the STUN message between the IFMI and various NAT devices. If you modify the address incorrectly, the gateway and multimedia devices accessing NGN through the NAT will be unable to register normally.

MOD M3DE

Modifying M3UA destination entity

If you modify the “Link set selection mask” parameter in the M3UA destination entity data incorrectly, “uniform swing” will happen to the signaling link selection from this office to the destination entity.

MOD M3LKS

Modifying M3UA link set

If you modify the “Link selection mask” parameter in the M3UA link set data incorrectly, “uniform swing” will happen to the signaling link selection from this office to the destination entity.

MOD M3RT

Modifying M3UA route

The M3UA route data defines the route priority of various M3UA link sets. If you modify the M3UA route data incorrectly, the signaling route set network between this office and the related destination entity will be changed.

MOD N7DSP

Modifying MTP destination signaling point

If you modify the “link set selection mask” parameter in the MTP destination signaling point (DSP) data incorrectly, “uniform swing” will happen to the signaling link selection from this office to the DSP.

MOD N7LKS

Modifying MTP link set

If you modify the “link selection mask” parameter in the MTP link set data incorrectly, “uniform swing” will happen to the signaling link selection from this office to the DSP.



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Command name


MOD N7RT

Modifying MTP route

The MTP route data defines the route priority of various MTP link sets. If you modify the MTP route data incorrectly, the signaling route set network between this office and the related DSP will be changed.

STP V5SYS

Stop V5 interface

If the stopped V5 interface is not the desired one to be processed, the V5 accessing system being used will be interrupted.

BLK V5LNK Block V5 link If the range of the blocked V5 link includes the

normally used V5 link, the latter will be unavailable.

4.3.8 Dangerous Operations on Route and Trunk Commands

Table 4-13 Dangerous Operations on management of routes and trunks

Command name


MOD OFC Modifying office direction

The office direction data contains important information such as the opposite office level and the DSP code. Modifying the office direction data incorrectly will cause call failure to the office direction.

MOD SRT Modifying sub-route

The sub-route data contains important information such as the office direction number and trunk group selection mode. Modifying the sub-route data incorrectly will cause group selection failure of the sub-route.

MOD RT Modifying route

The route data contains important information such as the sub-route number and the sub-route selection mode. Modifying the route data incorrectly will cause confusion or failure when the system selects the sub-route.

MOD RTANA

Modifying route analysis

The route analysis data contains important information such as route number, caller category and caller address nature. Modifying the route analysis data incorrectly will cause confusion or failure of the inter-office call.

MOD SIPTG

Modifying SIP trunk group

The SIP trunk group data contains important information such as charging source code, sub-route number and remote URI. Modifying the SIP trunk group data incorrectly can cause charging confusion, connection failure and interconnection failure.



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Command name


MOD H323TG

Modifying H.323 trunk group

The H.323 trunk group data contains important information such as charging source code, sub-route number and H.323 trunk type. Modifying the H.323 trunk group data incorrectly can cause charging confusion, connection failure and interconnection failure.

MOD N7TG

Modifying Number 7 trunk group

The No. 7 trunk group data contains important information such as charging source code, sub-route number, equipment ID (EID), DPC and OPC. Modifying the No. 7 trunk group data incorrectly can cause charging confusion, connection failure and interconnection failure.

MOD N1TG

Modifying R2 trunk group

The R2 trunk group data contains important information such as charging source code, sub-route number and EID. Modifying the R2 trunk group data incorrectly can cause charging confusion, connection failure and interconnection failure.

MOD PRATG

Modifying PRA trunk group

The PRA trunk group data contains important information such as sub-route number, signaling link number and default caller number. Modifying the PRA trunk group data incorrectly can cause charging confusion, connection failure and interconnection failure.

4.3.9 Dangerous Operations on Number Analysis Commands

Table 4-14 Dangerous Operations on number analysis commands

Command name


ADD CNACLD

Adding called number analysis

The SoftX3000 finds, analyzes and processes the call prefix in the call prefix table that is most similar to the called number according to the maximum matching principle. Therefore, wrong call prefix data will cause undesired connection and charging results.

MOD DNC

Modifying number change

The number change data defines important information such as number change type and number change content. Modifying the number change data incorrectly will cause call failure of the subscriber of this office and the incoming subscriber that use the change index.

MOD CLRDSN

Modifying caller number discrimination group

The caller number discrimination group data defines important information such as caller address nature and discrimination type. Modifying the caller number discrimination group data incorrectly will cause call failure of related office direction.



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Command name


MOD CLDGRP

Modifying called number barring group

The called number barring group data defines the black and white list of the called prefix. Modifying the called number barring group data incorrectly will cause related call failure.

SET GRPAC

Setting inter-group call barring indication

The inter-group call barring indication data defines the barring attribute between the barring groups (including the black and white barring list). Modifying the inter-group call barring indication data incorrectly will cause chaotic call barring relationship.

4.3.10 Dangerous Operations on Traffic Management Commands

Table 4-15 Dangerous Operations on traffic management commands

Command name


SET CONADDR

Setting local IP address for controlling console

When there are multiple IFMI boards, the SoftX3000 can only use one IFMI to dispatch the control message between the IFMI and the console. If you modify the address incorrectly, no console will be able to register normally.

MOD CXCON

Modifying Centrex console

The Centrex console data defines important information such as console IP address, account and password. If you modify the Centrex console data incorrectly, the console will not be able to register normally.

MOD MCUCNF

Modifying MCU configuration

The MCU configuration data defines important information such as MCU IP address and call source code. If you modify the MCU configuration data incorrectly, the video conference service will be unavailable.

MOD IDOSMC

Modifying iDo and SMC

The iDo and SMC data define important information such as iDo IP address, SMC IP address, SMC port number and special service code. If you modify the iDo and SMC data incorrectly, the video conference service will be unavailable.

MOD CHGCLS

Modifying charging class

The charging class data defines important charging information such as initial metering time interval (TA) and metering pulse count (PB) when the SoftX3000 interconnects the SCP. If you modify the charging class data incorrectly, the charging of the intelligent call will be confused.



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Command name


RMV CHGCLS

Removing charging class

The charging class data defines important charging information such as TA and PB when the SoftX3000 interconnects the SCP. If you remove the charging class data unnecessarily, the related intelligent call will not be able to be charged.

RMV SRV Removing IPN service logic file

If you remove the IPN service logic file, the IPN service on all the FCCU modules will be unavailable.

DEA SRV Deactivate IPN service logic file

If you deactivate the IPN service logic file, the IPN service on all the FCCU modules will be unavailable.

4.3.11 Dangerous Operations on Network Management Commands

Table 4-16 Dangerous Operations on network management commands

Command name


ADD NMIDEST

Adding originating destination code control

This command is used to restrict the route selection from local office subscriber or incoming trunk to the specific destination code. The restricted destination code can be nation code, area code, exchange code, subscriber code or special service code. This command can restrict some outgoing, incoming or tandem calls.

ADD NMODEST

Adding outgoing destination code control

This command is used to restrict the call of specific destination code to enter a type of trunk group. The restricted destination code can be nation code, area code, exchange code, subscriber code or special service code. This command can restrict some calls that enter a type of trunk group.

ADD NMCICD

Adding circuit orient control

This command is used to change bi-directional trunk circuit to incoming call trunk circuit. Using this command can cause outgoing trunk connection failure of bi-directional trunk circuit.

ADD NMCICR

Adding circuit reject control

This command is used to pause the unidirectional and/or bi-directional trunk circuit. Using this command can reject the call of related trunk circuit.

Routine Maintenance Guide U-SYS SoftX3000 SoftSwitch System Chapter 5 Maintenance Record Table


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Chapter 5 Maintenance Record Table

5.1 Daily Maintenance Record of SoftX3000

SoftSwitch office name: Maintenance date:

Time on duty: from to Shift from: Shift to:

Maintenance item State Remark Maintenance person

Temperature Normal Abnormal

Humidity Normal Abnormal

Fire protection Normal Abnormal

Dust-proof condition Good Bad

Equipment room environment

Theftproof condition Normal Abnormal

Power supply for cabinet

Normal Abnormal

Power supply for LAN Switch

Normal Abnormal

Power supply for server Normal Abnormal

Power supply for service frame

Normal Abnormal

Power supply system

Power supply for MRS6000 frame

Normal Abnormal

Hardware operation state of BAM

Normal Abnormal

Software operation state of BAM

Normal Abnormal

Communication state of BAM

Normal Abnormal

Hardware operation state of iGWB

Normal Abnormal

Software operation state of iGWB

Normal Abnormal

Communication state of iGWB

Normal Abnormal

Terminal system

Hardware operation state of the emergency workstation

Normal Abnormal



5-2



Communication state of the emergency workstation

Normal Abnormal

File backup state of the emergency workstation

Normal Abnormal

Terminal system

Operation state of BAM Gateway Tool

Normal Abnormal

State of power distribution frame

Normal Abnormal

State of the ALUI board Normal Abnormal

State of alarm box Normal Abnormal

Alarm system

State of alarm console Normal Abnormal

Bill alarm No Yes

State of bill pool in host Normal Abnormal

Generation of iGWB bill files

Normal Abnormal Billing system

Backup of iGWB bill files Normal Abnormal

Operation of power distribution frame

Normal Abnormal

Operation of fan frames Normal Abnormal

Operation of service frames

Normal Abnormal

Operation of BAM Normal Abnormal

Operation of iGWB Normal Abnormal

State of CKII clock phase-lock loop

Normal Abnormal

State of EPII clock Normal Abnormal

State of FE port Normal Abnormal

State of E1 port Normal Abnormal

CPU usage Normal Abnormal

Equipment operation

Dual-homing state Normal Abnormal



5-3



AG registration Normal Abnormal

TG registration Normal Abnormal

UMG registration Normal Abnormal

Service implementation

Trunk circuit Normal Abnormal

Traffic measurement tasks

Normal Abnormal Traffic measurement Traffic measurement

results Normal Abnormal

Exceptions and handling methods

Unsolved exceptions

5.2 Monthly Maintenance Record of SoftX3000


Maintenance date (year and month):

Maintenance person:


Power supply system Completed Undone

Cables Completed Undone

Maintaining Grounding System

Completed Undone

Protection system Completed Undone

Cabinets

Dust-proof system Completed Undone



5-4


Maintenance person:


Operator password Completed Undone

BAM system time Completed Undone

iGWB system time Completed Undone

Emergency workstation time

Completed Undone

BAM hard disk space Completed Undone

Terminal System

Backup of BAM database Completed Undone

Storage of spare parts Normal Abnormal Spare Parts Quantity of spare parts Normal Abnormal


Unsolved exceptions



5-5

5.3 Yearly Maintenance Record of SoftX3000



Maintenance person:


Cleaning fan frame 0 Completed Undone

Cleaning air deflector 0 Completed Undone

Cleaning board 0 Completed Undone


Cabinets








Cabinets



Unsolved problem



5-6

5.4 Data Modification Record of SoftX3000


Modification cause Modified contents Modification time

Modifier



5-7

5.5 Fault Handling Record of SoftX3000


Occurrence time: Solving time:

Person on duty: Handling person:

Category of fault: Hardware fault Power supply fault Clock fault FE/E1 interface fault Bearer network fault Transport network

fault Fault in communication between foreground and background Media

gateway fault MRS fault User terminal fault Attendant console fault User line fault MTP link fault SIGTRAN link fault PRA link fault V5 interface fault Trunk circuit fault Charging

fault Other faults

Source of fault: Customer complaint Alarm system Found in routine maintenance Other sources

Description of fault:

Handling method and result:



5-8

5.6 Board Replacement Record of SoftX3000


Replacement cause

Name and model of the

replaced board

Name and model of the new board

Replacement

quantity

Replacement date

Maintenance person

Routine Maintenance Guide U-SYS SoftX3000 SoftSwitch System Chapter 6 Common Maintenance Commands


6-1

Chapter 6 Common Maintenance Commands

Function category Function of command MML command

Backing up BAM database and registry BKP DB

Backing up supplementary service data BKP SS

Backing up IPN service data BKP IPN

Backing up RACF service data BKP RACF

Displaying dual-homing working status DSP DHSTA

Displaying module version DSP EXVER

Displaying board version DSP BVER

Displaying patch version DSP PATCHVER

Displaying patch status DSP PATCH

Displaying running license file status DSP LICENSE

Listing command log LST CMDLOG

System management

Displaying system time DSP TIME

Displaying PDB status DSP PDB

Displaying environment status DSP ENV

Displaying frame status DSP FRM

Displaying fan status DSP FAN

Displaying communication status DSP COMM

Displaying board memory status DSP MEM

Displaying CPU rate DSP CPUR

Displaying port status DSP PORT

Displaying lock phase of clock source status DSP CLKPH

Displaying clock status of board DSP CLKBRD

Displaying MRPA version DSP MRPAVER

Display MRPA status DSP MRPA

Displaying MRPA wave file DSP MRPAWF

Equipment management

Displaying MRPA default parameter DSP MRPAPAR



6-2


Displaying MRPA resource DSP MRPARES Equipment

management Displaying MRPA CPU usage DSP

MRPACPU

Activating media gateway ACT MGW

Displaying media gateway status DSP MGW

Displaying Softswitch (Gateway) status DSP GW

Displaying termination status DSP EPST

Media gateway management

Deregister termination device URG EDPT

Pinging IP address of destination PING

Displaying MGCP version DSP MGCPVER

Displaying H.248 version DSP H248VER

Displaying M2UA version DSP M2VER

Displaying M2UA link status DSP M2LNK

Displaying M3UA version DSP M3VER

Displaying M3UA link status DSP M3LNK

Displaying M3UA link status by entity DSP M3DLNK

Displaying M3UA link statues by linkset DSP M3LSLNK

Displaying M3UA route status DSP M3RT

Displaying V5UA stack version DSP V5UAVER

Displaying V5UA link status DSP V5UALNK

Displaying IUA version DSP IUAVER

Displaying IUA link status DSP IUALNK

Displaying SCTP version DSP SCTPVER

Displaying SCTP association status DSP SCTPAM

Displaying running SCTP association status DSP SCTPAR

Displaying MTP2 version DSP MTP2VER

Signaling protocol management

Displaying MTP2 link status DSP MTP2LNK



6-3


Displaying MTP link status DSP N7LNK

Displaying link status by destination point code DSP N7DLNK

Displaying MTP link status by link set DSP N7LSLNK

Displaying MTP route status DSP N7RT

Displaying status of SCCP destination signaling point

DSP SCCPDSP

Displaying status of SCCP subsystem DSP SCCPSSN

Displaying V5 interface status DSP V5I

Displaying V5 link status DSP V5LNK Signaling protocol management Displaying PRA link status DSP PRALNK

Displaying trunk circuit status DSP TKC

Displaying circuit status of R2 and PRA trunk DSP N1C

Displaying No. 7 trunk circuit status according to channel number DSP N7C

Displaying No. 7 trunk circuit status according to office direction number DSP OFTK

Displaying No7 trunk circuits with specified status DSP OFTS

Trunk circuit management

Displaying V5 trunk circuit status DSP V5TK

Listing subscriber attribute LST SBR

Listing subscriber number layout LST USER

Listing subscriber statistic information LST SBRSTA

Parking subscriber PRK SBR

Restoring subscriber RES SBR

Parking owing subscriber PRK OWSBR

Restoring owing subscriber RES OWSBR

Parking subscriber but reserve number PKR SBR

Subscriber management

Moveing subscriber but reserve number MVR SBR



6-4


Displaying ticket pool status DSP BILPOL

Displaying meter table of device DSP BILMTR

Starting fetching ticket immediately STR BILIF

Stopping fetching ticket immediately STP BILIF

Renewing meter table and statistics ticket table RST BILPOL

Backing up bill database BKP BILDB

Bill management

Restoring SCP bills RES BILSCP

Listing traffic task information LST TRFINF Traffic measurement Listing traffic result report LST TRFRPT

Set alarm output switch of current workstation SET CWSON

Resetting AlarmBox RST ALMBOX

Clearing AlarmBox light CLR BOXLGT Alarm management

Stopping AlarmBox sound STP ALMSND

Routine Maintenance Guide U-SYS SoftX3000 SoftSwitch System Appendix A Acronyms and Abbreviations


A-1

Appendix A Acronyms and Abbreviations

Abbreviation Full expression

A

AMG Access Media Gateway

AN Access Network

B

BAM Back Administration Module

BFII Back FE Interface Unit

BITS Building Integrated Timing Supply

BSGI Broadband Signaling Gateway

C

CDBI Central Database Board

CDR Call Detail Record

Centrex Central Office Exchange Service

CIC Circuit Identification Code

CKII Clock Interface Unit

CPC Central Processing Board

D

DDI Direct-Dialing-In

DPC Destination Point Code

DSS1 Digital Subscriber Signaling No.1

DTMF Dual-Tone Multifrequency

E

EC Echo Canceller

EPII E1_Pool Interface Unit

F

FCCU Fixed Calling Control Unit

FCSU Fixed Calling Control Unit and Signaling process Unit

FE Fast Ethernet

FSK Frequency Shift Keying

G

GK Gatekeeper



A-2


GW GateWay

I

IAD Integrated Access Device

IFMI IP Forward Module

iGWB iGateWay Bill

IN Intelligent Network

INAP Intelligent Network Application Protocol

iOSS integrated Operation Support System

IP Internet Protocol

IPN Internet Personal Number

ISDN Integrated Services Digital Network

ISUP ISDN User Part

ITU-T International Telecommunication Union - Telecommunication Standardization Sector

IUA ISDN Q.921-User Adaptation Layer

M

M2UA Message Transfer Part 2 (MTP2) -User Adaptation Layer

M3UA Message Transfer Part 3 (MTP3) -User Adaptation Layer

MCU Multipoint Control Unit

MG Media Gateway

MGC Media Gateway Controller

MGCP Media Gateway Control Protocol

MML Man Machine Language

MRCA Media Resource Control Unit

MRIA Media Resource Interface Unit

MRS Media Resource Server

MSGI Multimedia Signaling Gateway Unit

MTA Media Terminal Adapter

MTP Message Transfer Part

N

NAT Network Address Translation

NCS Network-Based Call Signaling

NGN Next Generation Network



A-3


NMS Network management System

NP Number Portability

O

OAM Operation Administration and Maintenance

P

PBX Private Branch Exchange

PDB Power Distribution Box

POTS Plain Old Telephone Service

PSTN Public Switched Telephone Network

R

RAS Registration, Admission and Status

S

SAU Signaling Access Unit

SCN Switched Circuit Network

SCP Service Control Point

SCTP Stream Control Transmission Protocol

SG Signaling Gateway

SIGTRAN Signaling Transport

SIP Session Initiation Protocol

SIUI System Interface Unit

SP Signaling Point

SSP Service Switching Point

STP Signaling Transfer Point

T

TDM Time Division Multiplex(ing)

TMG Trunk Media Gateway

U

UMG Universal Media Gateway

U-NICA Universal Network Intelligent Core Architecture

U-SYS You Design Your System

V

V5UA V5.2-User Adaptation Layer

VoIP Voice Over IP



A-4

A



i-1

Index

A alarm system

daily maintenance task, 2-5

B billing system


board replacement record, 5-7

C cabinet

monthly maintenance task, 2-11

check billing system

bill alarm, 2-5

bill pool, 2-6

iGWB bill backup, 2-6

iGWB bill generation, 2-6

clean

air deflector, 3-6

air filter, 3-3

air filter gauze, 3-4

board, 3-7

fan frame, 3-5

common maintenance commands, 6-1

D daily maintenance record, 5-1

daily maintenance task

billing system, 2-5

equipment operation, 2-7

equipment room, 2-1

power supply system, 2-2

service implementation, 2-9

terminal system, 2-3, 2-5

traffic measurement, 2-10

dangerous command

charging data, 4-8

equipment management, 4-6

gateway, 4-8

network management, 4-13

number analysis, 4-11

office information, 4-7

route and trunk, 4-10

signaling and protocol, 4-9

system management, 4-5

traffic measurement, 4-12

dangerous operation

BAM and iGWB, 4-3

BAM Manager, 4-4

board, 4-1

cable, 4-2

power, 4-3

Windows 2000 server, 4-4

data modification record, 5-5

E equipment operation

BAM, 2-7

check CKII clock, 2-8

check CPU usage, 2-8

check E1 port, 2-8

check EPII clock, 2-8

check FE port, 2-8


fan frame, 2-7

frame, 2-7

iGWB, 2-7

power distribution frame, 2-7

equipment room

air cleanness, 1-5


dust proof, 2-2

electromagnetic radiation resistance, 1-7

ESD prevention, 1-7



i-2

fire prevention, 2-2

grounding, 1-10

humidity, 2-1

relative humidity, 1-5

temperature, 1-3, 2-1

temperature variation, 1-4

theft proof, 2-2

F fault handling record, 5-6

G grounding system

BGND, 3-2

cables, 3-1

check, 3-2

GND, 3-2

measure grounding resistance, 3-2

PGND, 3-2

M monthly maintenance record, 5-3

monthly maintenance task

cabinet, 2-11

spare parts, 2-13

terminal system, 2-12

P power supply system

cabinet, 2-2


LAN Switch, 2-2

MRS6000 frame, 2-3

server, 2-2

service frame, 2-3

R routine maintenance

basic principle, 1-1

daily maintenance, 1-2

periodic maintenance, 1-3

purpose, 1-2

S service implementation


spare parts

monthlymaintenance task, 2-13

T terminal system


monthlymaintenance task, 2-12

traffic measurement


Y yearly maintenance record, 5-4

yearly maintenance tasks, 2-14

i.

Documents

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