E__trshome_outfiles_ZXWN AGW (V3.06) WiMAX Wireless Access Gateway Troubleshooting...

ZXWN AGWWiMAX wireless access gateway

Troubleshooting Manual

Version 3.06

ZTE CORPORATION ZTE Plaza, Keji Road South, Hi-Tech Industrial Park, Nanshan District, Shenzhen, P. R. China 518057 Tel: (86) 755 26771900 800-9830-9830 Fax: (86) 755 26772236 URL: http://support.zte.com.cn E-mail: [email protected]

http://support.zte.com.cn/

mailto:[email protected]

LEGAL INFORMATION Copyright © 2006 ZTE CORPORATION. The contents of this document are protected by copyright laws and international treaties. Any reproduction or distribution of this document or any portion of this document, in any form by any means, without the prior written consent of ZTE CORPORATION is prohibited. Additionally, the contents of this document are protected by contractual confidentiality obligations. All company, brand and product names are trade or service marks, or registered trade or service marks, of ZTE CORPORATION or of their respective owners. This document is provided “as is”, and all express, implied, or statutory warranties, representations or conditions are disclaimed, including without limitation any implied warranty of merchantability, fitness for a particular purpose, title or non-infringement. ZTE CORPORATION and its licensors shall not be liable for damages resulting from the use of or reliance on the information contained herein. ZTE CORPORATION or its licensors may have current or pending intellectual property rights or applications covering the subject matter of this document. Except as expressly provided in any written license between ZTE CORPORATION and its licensee, the user of this document shall not acquire any license to the subject matter herein. The contents of this document and all policies of ZTE CORPORATION, including without limitation policies related to support or training are subject to change without notice.

Revision History

Date Revision No. Serial No. Reason for Revision

11/08/2006 R1.0 sjzl20061534 First Edition

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Document Name ZXWN AGW (V3.06) WiMAX wireless access gateway Troubleshooting Manual

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Contents

About This Manual ............................................................ i Purpose................................................................................ i Intended Audience ................................................................. i Prerequisite Skill and Knowledge .............................................. i What Is in This Manual ........................................................... i Related Documentation.......................................................... ii Conventions......................................................................... ii How to Get in Touch............................................................. iii

Chapter 1..........................................................................1

Handling Major Accidents................................................1 Overview .............................................................................1 Handling Major Accidents .......................................................1

Chapter 2..........................................................................5

Handling Common Faults.................................................5 Overview .............................................................................5

Signaling and Support Faults ............................................5 Interruption of Inter-Module Communication.............................6 Interruption of Communication between the NM server and MP....6

Service Faults.................................................................7 MS cannot Ping through the External CSN ................................8 User Activation Fails on Non-Transparent Mode .........................8 CSN Cannot Ping through MS..................................................8 DHCP Response Timed Out.....................................................9 User Activation Fails because NAI Does Not Support It ...............9 User Activation fails because IP Address Pool of AGW is Null...... 10 User Activation Fails because of Failure to Obtain DHCP Server.. 10 User Activation Fails because of AGWUP Board Does Not Respond........................................................................................ 11 Uplink Data Cannot Be Send to CSN ...................................... 11 Downlink Data Cannot Be Send to MS .................................... 11

NAT & NAPT Module Fault .....................................................12 RADIUS Authentication Failure ..............................................12

Alarm Faults................................................................. 13 Smoke Alarm......................................................................14 Infrared Alarm ....................................................................14 Temperature Alarm .............................................................14

Appendix A.....................................................................17

Index..............................................................................21

Glossary..........................................................................23

Figures............................................................................25

Tables .............................................................................27

About This Manual

Purpose

This manual provides procedures and guidelines that support the maintenance of the ZXWN AGW WiMAX Wireless Access Gateway.

Intended Audience

This document is intended for engineers and technicians who perform maintenance activities on the ZXWN AGW WiMAX Wireless Access Gateway.

Prerequisite Skill and Knowledge

To use this document effectively, users should have a general understanding of wireless telecommunications technology. Familiarity with the following is helpful:

AGW system and its various components

Local operating procedures

What Is in This Manual

This manual contains the following chapters:

T AB L E 1 C H A P T E R S U M M AR Y

Chapter Summary

Chapter 1 Handling Major Accidents

Explains the causes of Major accidents and methods to avoid it

Chapter 2 Handling Common faults

Explains the causes of Common faults and methods to avoid it.

Confidential and Proprietary Information of ZTE CORPORATION i

ZXWN AGW (V3.06) WiMAX Wireless Access Gateway Troubleshooting Manual

Related Documentation

The following documentation is related to this manual:

ZXWN AGW (V3.06) WiMAX Wireless Access Gateway Technical Manual

ZXWN AGW (V3.06) WiMAX Wireless Access Gateway Routine Maintenance Manual

ZXWN AGW (V3.06) WiMAX Wireless Access Gateway Emergency Maintenance Manual

ZXWN AGW (V3.06) WiMAX Wireless Access Gateway Configuration Manual

ZXWN AGW (V3.06) WiMAX Wireless Access Gateway Installation Manual

ZXWN AGW (V3.06) WiMAX Wireless Access Gateway Hardware Manual

ZXWN AGW (V3.06) WiMAX Wireless Access Gateway Operation Manual

Conventions

ZTE documents employ the following typographical conventions. Typographical Conventions

T AB L E 2 TY P O G R AP H I C AL C O N V E N T I O N S

Typeface Meaning

Italics References to other Manuals and documents.

“Quotes” Links on screens.

Bold Menus, menu options, function names, input fields, radio button names, check boxes, drop-down lists, dialog box names, window names.

CAPS Keys on the keyboard and buttons on screens and company name.

Constant width Text that you type, program code, files and directory names, and function names.

[ ] Optional parameters.

{ } Mandatory parameters.

| Select one of the parameters that are delimited by it.

Mouse Operation

Conventions

T AB L E 3 M O U S E OP E R AT I O N C O N V E N T I O N S

Typeface Meaning

ii Confidential and Proprietary Information of ZTE CORPORATION

Error! Style not defined.

Typeface Meaning

Click Refers to clicking the primary mouse button (usually the left mouse button) once.

Double-click Refers to quickly clicking the primary mouse button (usually the left mouse button) twice.

Right-click Refers to clicking the secondary mouse button (usually the right mouse button) once.

How to Get in Touch

The following sections provide information on how to obtain support for the documentation and the software.

If you have problems, questions, comments, or suggestions regarding your product, contact us by e-mail at [email protected]. You can also call our customer support center at (86) 755 26771900 and (86) 800-9830-9830.

Customer Support

ZTE welcomes your comments and suggestions on the quality and usefulness of this document. For further questions, comments, or suggestions on the documentation, you can contact us by e-mail at [email protected]; or you can fax your comments and suggestions to (86) 755 26772236. You can also browse our website at http://support.zte.com.cn, which contains various interesting subjects like documentation, knowledge base, forum and service request.

Documentation Support

Confidential and Proprietary Information of ZTE CORPORATION iii



iv Confidential and Proprietary Information of ZTE CORPORATION

C h a p t e r 1

Handling Major Accidents

Overview

This chapter describes the classifications of major accidents involved in AGW. It also shows the procedural flow to handle the accidents in an effective manner.

Introduction

This chapter includes the following topics. Contents

T AB L E 4 TO P I C S I N C H AP T E R 1

Topic Page No.

Handling Major Accidents 1

Handling Major Accidents

This section explains briefly about the major accidents in AGW. Major accidents refer to alarms, faults or failures that cannot be located or settled through alarm or notification messages, which affects normal service of AGW system.

Overview

Classification Major accidents which affect the normal service of AGW system are classified into five parts.

Basic services cannot be provided due to causes, such as equipment breakdown, system down, system disorder, environment or human factor. The faults cannot be removed after preliminary handling and emergency handling is needed immediately.

Interruption of service that affects the major sites or customers, which draws the attention of main officials of customer.

Total interruption of foreground-background communication.

Influence on basic services provisioning by the other equipment.

Confidential and Proprietary Information of ZTE CORPORATION 1


Harmful to safety of the customer caused by the product.

Principles Main principles of handling major accidents are:

Once user identified or report the critical fault (level-1 fault), it is required to clear the faults and restore the system as soon as possible, so that the damage or loss caused by the fault should be minimal.

Customer’s interest should be taken care and try to protect it.

In the meantime, user can get technical support from ZTE local office or product division.

Sometimes faults may arise through the system. Faults such as total or partial power failure, network failure and database failure and other causes. User must thoroughly check the system, so that power and communication are confirmed without any faults. Then user may shift to Alarm management system to locate the possible node in which problem exists.

Procedures Once major accident happens, call the authority department immediately and report him to take timely measure to rectify the problem. Afterwards, submit a failure report to the authority department and supervisors. Besides these, organize relevant technicians, units and equipment suppliers to figure out causes of the accident, so that notes for effective measures can be taken from the subsequent operation to avoid its happening again. After handling major accident, fill in the detailed major accident record carefully and archive it.

Procedural flow of handling major accidents is shown in Figure 1.

2 Confidential and Proprietary Information of ZTE CORPORATION

UChapter UTU1UT Error! Style not defined.

F I G U R E 1 P R O C E D U R E S O F H AN D L I N G MAJ O R AC C I D E N T S

Accident Starts

User reports to ZTECustomer Support Center

User reports to ZTEengineer

Report to ZTE Customer Support CenterZTE Engineer

Fill in Level 1 Fault Form, notifylocal ZTE office or sub-center ofZTE Customer Support Center

Assign engineer of local office to goto accident site

Manager of ZTE Local Office

Assign engineer of Customer CareCenter (of product division) to

provide remote technical supportOn-duty Manager of Major

AccidentsAssign a dedicated engineer to

guide user and follow up theaccident handling

Manager of ZTE Local Office

Co-handling the accidentLocal Office/Engineer of CustomerCare Center (of product division)

Solved in 30 minutes?

Notify Emergency Team and TeamLeader

ZTE Customer Support Center

Handle and settle the accidentEmergency Team

Fill in Emergency Handling Formand summarize

Fault handling departments

Visit the customerZTE Local Office

End

Yes

No


C h a p t e r 2

Handling Common Faults

Overview

This chapter describes the classifications of common faults involved in ZXWN AGW. It also describes the methods to handle the common faults in an effective manner. Common faults are categorized into four types such as signaling and support faults, service faults, billing faults and alarm faults.

Introduction

Contents This chapter includes the following topics.

T AB L E 5 TO P I C S I N C H AP T E R 2

Topic Page No.

Signaling and Support Faults 5

Service Faults 7

Alarm Faults 13

Signaling and Support Faults Overview This section explains the types of faults on signaling and support

category and the methods to handle it.

Table 6 shows the various types of ZXWN AGW signaling and support faults.

Classifications

T AB L E 6 TY P E S O F S I G N AL I N G AN D S U P P O R T F AU L T S

Faults Page No.

Interruption of Inter-Module Communication 6

Interruption of Communication between the NM server and MP

6



Interruption of Inter-Module Communication

Communication between the modules is interrupted. Symptom

Faults are found through background O&M system. Source

OMP board and UIM board Related Boards

The inter-module communication is controlled by the UIM_2 board. Therefore, the following causes may contribute to the blocking of inter-module communication:

Cause of Fault

Both the active and standby UIM_2 boards are unplugged or damaged at the same time.

GCS sub card on UIM_2 board is damaged.

OMP backplane RMPB, the UIM_2 backplane RUIM1 or the connection line is damaged.

OMP board is unplugged or damaged.

First make sure the states of the OMP board and the UIM_2 board is normal. If the board or sub card on the board is having any fault, then replace it.

Troubleshooting

Check the backplane for connecting OMP and UIM_2 boards and the internal network cables.

If any board is damaged, inform to local ZTE office. Precautions

Interruption of Communication between the NM server and MP

Communication between the NM server and MP is interrupted. Symptom

Source Faults are found through background O&M system.

MP and NM Server Problem Related Modules

Cause of Fault In WiMAX system, data generated from the foreground are transferred from MP to NM server. They are further transferred to each operation and maintenance console. Once communication between the NM server and MP is interrupted, indicates that background loses contact with foreground. Maintenance personnel cannot able to monitor the running status of the foreground. These faults are caused by the following factors:

Network cable is broken or cause of fault switch.

Fault on network adapter of NM server.



Fault on OMP backplane RMPB.

OMP has been shut down or it is restarting.

Troubleshooting Following actions can be taken to avoid interruption between NM server and MP.

Check whether the MP is running normal.

Check whether the network cable and switch is normal.

Check the status of network adapter of NM server.

Check the network configurations of NM server and MP are correct.

If the NM server and MP are not located in the same LAN, please check the corresponding IP address configuration and gateway configuration are correct.

Precautions

Service Faults This section explains the types of faults on service category and the methods to handle it.

Overview

Table 7 shows the various types of ZXWN AGW service faults. Classifications

T AB L E 7 TY P E S O F S E R V I C E F AU L T S

Faults Page No.

MS cannot Ping through the External CSN 8

User Activation Fails on Non-Transparent Mode 8

CSN Cannot Ping through MS 8

DHCP Response Timed Out 9

User Activation Fails because NAI Does Not Support It 9

User Activation fails because IP Address Pool of AGW is Null

10

User Activation Fails because of Failure to Obtain DHCP Server

10

User Activation Fails because of AGWUP Board Does Not Respond

11

Uplink Data Cannot Be Send to CSN 11

Downlink Data Cannot Be Send to MS 11

NAT & NAPT Module Fault 12

RADIUS Authentication Failure 12



MS cannot Ping through the External CSN

When user pings through the external CSN from an MS, data packets cannot be returned by AGW.

Symptom


GGLP Problem Related Board

Data sent by AGW are lost in IP layer. Cause of Fault

Check whether any transit route occurs on AGW user plane in route configuration. If no route has been found, then add on to the configuration table of AGW.

Troubleshooting

Precautions Check normal status of the system.

User Activation Fails on Non-Transparent Mode

Symptom AGW fails to activate the user on the non-transparent mode.


None Problem Related Board

If authentication during user activation is configured in AGW system, then:

Causes of Fault

Client information should be configured in the RADIUS server.

Related route information should be added to AGW

Address of the RADIUS server should be added to background configurations.

Check the configurations of RADIUS server and related Username and password.

Troubleshooting


CSN Cannot Ping through MS

CSN cannot ping through MS. Symptom





Cause of Fault CSN cannot able to send the data packets correctly to the corresponding GGLP, unless a route to next hop address of GGLP is configured on CSN.

Troubleshooting Configure a route on CSN from MS to AGW. Precautions Check normal status of the system and activation of MS.

DHCP Response Timed Out

DHCP does not have any response. Symptom



Causes of Fault DHCP Response time out fault may be caused due to following reasons.

There is no route between GGLP and DHCP server.

The scope and address of DHCP server are not in the same network segment.

DHCP client IP has not been configured in IP Protocol Management.

Following measures can be taken to avoid DHCP response time out fault.

Troubleshooting

Check whether the static route is added through OMC client.

Make sure to add corresponding routes to DHCP server.

Modify the mask and scope of DHCP server to remain same as DHCP server.

User Activation Fails because NAI Does Not Support It

User activation fails because NAI does not support it. Symptom



NAI does not support user activation. Cause of Fault

Troubleshooting Configure the corresponding NAI via the background; or query through the signaling trace to check the correct NAI.




User Activation fails because IP Address Pool of AGW is Null

User activation fails in AGW system. Symptom


Problem Related Board

None

Cause of Fault Address IP pool of AGW system is null.

Check the background configurations and make sure the IP address pool of corresponding NAI is too small. If it is quite large, please use a probe to query the R_GIPOOL table entry on OMP to make sure the corresponding NAI has an idle address (status=0).

Troubleshooting

Check normal status of the system. Precautions

User Activation Fails because of Failure to Obtain DHCP Server

Symptom User activation fails due to failure in obtaining DHCP server.



None

Fail to get DHCP server Cause of Fault

Following measures can be taken to avoid user activation failure Troubleshooting

Check whether the DHCP server address is configured correctly on corresponding NAI configuration.

Check if there is any route between the GGLP and DHCP server. If there is no route found, add a static route to DHCP server in protocol stack.

Check the scope and address of DHCP server are located in the same network segment (Mask of scope should also be same as DHCP server).




User Activation Fails because of AGWUP Board Does Not Respond

User activation fails and AGWUP board does not respond. Symptom



AGWUP board does not respond (Get PID fail). Fault may be caused because the board is restarting or communication between AGWUP and OMP is blocked.

Cause of Fault

If User plane load share is changed, reboot the AGWUP boards. Troubleshooting


Uplink Data Cannot Be Send to CSN

Uplink data cannot be sent to CSN. Symptom



Following reasons are the causes of the fault. Causes of Fault

NAI does not support it.

Communication does not exist between AGW and CSN.

Source address of uplink data packet is inconsistent with the user activation context.

Following measures can be taken to avoid the fault. Troubleshooting

Make sure the source address of the uplink data is consistent with the user activation.


Downlink Data Cannot Be Send to MS

Downlink data cannot be sent to MS. Symptom



Following reasons are the causes of the fault. Causes of Fault



User activation does not exist.

NAI does not support it.

Following measures can be taken to avoid the fault. Troubleshooting

Check whether the NAI configured in the background is correct. These configuration items are related with the establishment of classifier on AGWUP board. Re-activate the user.

NAT & NAPT Module Fault

Matched public address is not found. Symptom



None

Following reasons are the causes of fault. Cause of Fault

Public address pool is used or not configured

IP packet is initiated externally first and mapping from the corresponding private address to the public address is not created.

Following measures are taken to avoid the fault. Troubleshooting

Configure or add a public address in the background configurations.

Module fault always occur, if the IP packet is initiated externally first, because the system does not support communications initiated externally.

Precautions System supports only NAT/NAPT address conversion IP packets of UDP, TCP and ICMP types.

RADIUS Authentication Failure

Symptom RADIUS authentication fails during user activation.



Cause of Fault Following reasons are causes of fault.

RADIUS server cannot ping through the RADIUS client.

RADIUS service on RADIUS server is not yet enabled.

RADIUS client is not registered on RADIUS server.

Troubleshooting



Following measures are taken to avoid the fault.

Check if there is any route existing from RADIUS server to RADIUS client.

Check the address of RADIUS client is configured on the background. Preferably the RADIUS address should be located in same network segment as the signaling address of the AGW. If address of RADIUS client is different from signaling address of the AGW, add the address of RADIUS client.

Check the communication between the RADIUS server and the GGLP to see that they are in same network segment.

Find the server.cfg file on RADIUS server and change IP address into the address of RADIUS server.

Run RADIUS server configurations and add a client in the client configurations, fill in the IP address and share key of the RADIUS client, open [Control Panel --> Services] to stop the “zxRADIUS” service, and then restart the service.

Precautions Following precautionary methods should be taken.

Refer to file “radius*.log” to view the information, where * indicates the number. As there may be multiple log files, just find the latest one.

User account suspended: User group where the user is located is set as "Attack protection", but the property should be set as "Normal".

Password mismatch: Check the share key and password is correct.

Alarm Faults This section explains the types of faults on alarm and the methods to handle it.

Overview

Table 8 shows the various types of ZXWN AGW alarm faults. Classifications



T AB L E 8 TY P E S O F AL A R M F AU L T S

Faults Page No.

Smoke Alarm 14

Infrared Alarm 14

Temperature Alarm 14

Smoke Alarm

Smoke Alarm is alerted in equipment room. Symptom


Smoke sensor and environment monitoring board Problem Related Board

Cause of Fault Smoke alarm occurs when the smoke sensor detects various types of smoke in the environment such as hidden fire, visible fire or smoke.

Following measures are taken to avoid the fault. Troubleshooting

Check the fire situation in the environment.

Smoking is prohibited in the equipment room.

Equipment room should be equipped with fire fighting devices. Precautions

Infrared Alarm

Infrared alarm is alerted in equipment room. Symptom


Infrared sensor and environment monitoring board Problem Related Board

Unauthorized entering into equipment room Cause of Fault

Security check is carried out immediately to ensure the access control of the equipment room is secure.

Troubleshooting

None Precautions

Temperature Alarm

Temperature alarm is alerted in equipment room. Symptom




Temperature sensor and environment monitoring board Problem Related Board

Temperature alarm is alerted during the ambient temperature exceeds the set range, whether it is too cold or too hot. Temperature exceeds the range, during the malfunctioning of air conditioners or fire in the equipment room.

Cause of Fault

Troubleshooting Check the status of air conditioners regularly and the environment of equipment room.

Precautions None


A p p e n d i x A

Abbreviations

Abbreviations Full Name

AGW Access Service Network Gateway

ASE Application Service Element

ASIG Analog Signaling

AuC Authentication Centre

Barring of All Incoming Calls supplementary service

BAIC

BCTC Backplane of Control Center

BCTL Back Control

BDT Back Digital Trunk

BFBI Back Fiber Bus Interface

BPSN Backplane of Packet Switch Network BS Basic Service (group)

BS Bearer Service

BSG Basic Service Group

BSNM Back S Network

BTS Base Transceiver Station

CAI Charge Advice Information

CB Cell Broadcast

CBC Cell Broadcast Centre

CBCH Cell Broadcast Channel

CBK Clear Back signal

CC Country Code

CCF Conditional Call Forwarding

The International Telegraph and Telephone Consultative Committee

CCITT

CF all Call Forwarding services




Call Forwarding on mobile subscriber Busy supplementary service

CFB

Call Forwarding on mobile subscriber Not Reachable supplementary service

CFNRc

Call Forwarding on No Reply supplementary service

CFNRy

Call Forwarding Unconditional supplementary service

CFU

CGC Circuit Group Congestion signal

CHUB Control HUB

CI Cell Identity

CLKG CLOCK Generator CLKI CLOCK Interface CLI Calling Line Identity

Calling Line Identification Presentation supplementary service

CLIP

Calling Line Identification Restriction supplementary service

CLIR

CM Connection Management

CMD Command

CMP Control Main Processor

COLI Connected Line Identity

Connected Line identification Presentation supplementary service

COLP

Connected Line identification Restriction supplementary service

COLR

DTB Digital Trunk Board GCS Gigabit Ethernet Connect Sub card

GGLP AGW Line Processor

GGUP AGW user control Processor

GLI GE Line Interface GLIQV Vitesse Quad GE GLI

GXS GE Base1000-X Sub card

IMAB IMA Board IPB IP Process Board IPI IP bearer Interface

IWFB IWF Board MONB MONIOTR BOARD MPB Main Process Board


UAppendix UTUA Abbreviations


Media Resource Board MRB

OMP Operation Main Processor

PLI POS Line Interface PSN Packet Switch Network

PSN4V Vitesse Packet Switch Network 40Gbps

PWRD POWER Distributor RMP Router Main Processor

Router Protocol process Board RPB

SDHB SDH Board SDTB Sonnet Digital Trunk Board SDU Selection and Distribution Unit

SMP Signal Main Processor

SMP Service Main Processor

Signaling Process Board SPB

TFI TDM Fiber Interface TSNB TDM Switch Network Board UIM Universal Interface Module

UIMC Universal Interface Module of BCTC

VTC Voice Transcoder Card WiMAX Worldwide Interoperability for Microwave Access


Index

Accidents, ii, 1, 3, 25 AGW, 1, 3, i, 1, 5, 7, 8, 9, 10, 11,

13, 17, 18 Board, 18, 19 CHUB, 18 Control, 17, 18 CSN, 7, 8, 9, 11 DHCP, 7, 9, 10, 24 Downlink, 7, 11 Ethernet, 18, 24 Faults, 2, 5, 6, 7, 8, 9, 10, 11,

12, 13, 14 Infrared, 14 IP, 7, 8, 10, 12, 13, 18, 24

Module, 5, 6, 7, 12, 19 Network, 6, 17, 19 OMP, 6, 7, 10, 11, 19 Ping, 7, 8 RADIUS, 7, 8, 12, 13 Server, 6, 7, 10, 24 Smoke, 14 Switch, 17, 19 Temperature, 14, 15 Uplink, 7, 11 User, 2, 7, 8, 9, 10, 11, 12, 13 WiMAX, 1, 3, i, 6, 19, 23 ZXWN-AGW, 18


Glossary

A byte, generally, is an 8-bit quantity of information, used mainly in referring to parallel data transfer, and data storage; also generally referred to in data communications as an octet or character.

Byte

In a premises distribution system, an equipment room is a special purpose room(s), with access to the backbone wiring, for housing Telecommunications, data processing, security and alarm equipment.

Equipment Room

In local area networks (LANs), a hub is wiring concentrator equipment used in hierarchical star physical wiring topologies. Those directly connected to terminals or other user devices are of ten referred to as local hubs or concentrators. Central hubs are those at the highest hierarchical level. Hubs often provide the means for interconnecting 10BaseT, coaxial or fiber optic cable LAN segments. Intelligent hubs may implement multiport bridging and network management functions.

Hub

Metropolitan area network established to provide high quality services but in limited area.

MAN

Worldwide Interoperability for Microwave Access WiMAX

Installs, repairs, or removes software according to instructions contained in .MSI files provided with the applications. If disabled, the installation, removal, repair, and modification of applications that make use of the Windows Installer will fail. Some applications make use of this service while running and those applications might not run.

Windows Installer

Starts and configures accessibility tools from one window. Utility Manager allows faster access to some accessibility tools and also displays the status of the tools or devices that it controls. This program saves users time because an administrator can designate those certain features start when Windows 2000 starts. Utility Manager includes three built-in accessibility tools: Magnifier, Narrator, and On-Screen Keyboard.

Utility Manager

Modems are devices that transform digital signals generated by Data Terminal Equipments (DTE) to analog signal formats, suitable for transmission through the extensive, world-wide connectivity of public and private, switched (dial up) and non-switched telephone voice networks.

Modems (Modulator/Demodulato

r)

RAID Redundant Array of Independent Disks for data backup.



Routers In IEEE 802 local area network (LAN) standards, routers are devices that connect autonomous networks of like architecture at the network layer (layer 3). Unlike a bridge, which operates transparently to communicating end-terminals at the logical link layer (layer 2); a router reacts only to packets addressed to it by either a terminal or another router. Routers perform packet (as opposed to frame) routing and forwarding functions; they can select one of many potential paths based on transit delay, network congestion or other criteria. How routers perform their functions is largely determined by the protocols implemented in the networks they interconnect.

Server In a network, a server is equipment that makes available file, database, printing, facsimile, communications or other services to client terminals/stations with access to the network. A gateway is a server that permits client terminal/station access to external communications networks and/or information systems.

Dynamic Host Configuration Protocol Client manages network configuration by registering and updating IP addresses and Domain Name Server (DNS) names. Do not have to manually change the IP settings when a client, such as a roaming user, travels throughout the network. The client is automatically given a new IP address regardless of the subnet it reconnects to—as long as a DHCP server is accessible from each of those subnets.

DHCP Client

Transmission control protocol/internet protocol. TCP/IP is the transport layer and Internet layer, respectively, of the Internet suite of protocols. TCP corresponds to layer 4 of the OSI protocol stack: IP performs some of the functions of layer 3. It is a connectionless protocol used primarily to connect dissimilar networks to each other.

TCP/IP

Compatible When hardware/software successfully cooperates with an Operating system or hardware, we call it as compatible with each other.

Trunk 1. A heavy-duty telephone line. T1

Trunk 3. A telephone trunk line. T3

World Wide Web. A hypertext transmission protocol set up on Internet.

WWW

Ethernet connection that uses UTP (Unshielded Twisted-Pair) wire.

10BASE-T


Figures

Figure 1 Procedures of Handling Major Accidents....................3


Tables

Table 1 Chapter Summary ...................................................i Table 2 Typographical Conventions ...................................... ii Table 3 Mouse Operation Conventions .................................. ii Table 4 Topics in Chapter 1.................................................1 Figure 1 Procedures of Handling Major Accidents....................3 Table 5 Topics in Chapter 2.................................................5 Table 6 Types of Signaling and Support Faults .......................5 Table 7 Types of Service Faults ...........................................7 Table 8 Types of Alarm Faults ........................................... 14


E__trshome_outfiles_ZXWN AGW (V3.06) WiMAX Wireless Access Gateway Troubleshooting...

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