00392303-Product Description(V100R007 02,Mini)

HUAWEI UMG8900 Universal Media Gateway

V100R007

Product Description

Issue 02

Date 2009-01-09

Part Number 00392303

Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. For anyassistance, please contact our local office or company headquarters.

Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Copyright © Huawei Technologies Co., Ltd. 2009. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are the property of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but the statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

http://www.huawei.com

mailto:[email protected]

Contents

About This Document.....................................................................................................................1

1 Overview......................................................................................................................................1-11.1 Basic Functions...............................................................................................................................................1-21.2 Product Orientation.........................................................................................................................................1-21.3 NGN Evolution...............................................................................................................................................1-4

2 Key Benefits................................................................................................................................2-12.1 Series of Hardware Platforms.........................................................................................................................2-2

2.1.1 SSM-4 Hardware Platform.....................................................................................................................2-22.1.2 UAM Series of Hardware Platforms......................................................................................................2-3

2.2 Powerful Service Functions............................................................................................................................2-52.3 Advanced Voice Quality Assurance Technologies.........................................................................................2-72.4 Carrier-Class Security and Reliability.............................................................................................................2-82.5 Easy Installation and Maintenance..................................................................................................................2-9

3 System Architecture...................................................................................................................3-13.1 Physical Architecture......................................................................................................................................3-2

3.1.1 Cabinet Appearance...............................................................................................................................3-23.1.2 Frame Appearance..................................................................................................................................3-6

3.2 Hardware Architecture....................................................................................................................................3-63.2.1 Cabinet Architecture..............................................................................................................................3-63.2.2 Frame Architecture...............................................................................................................................3-133.2.3 External Interfaces................................................................................................................................3-13

3.3 Logical Architecture......................................................................................................................................3-143.4 Software Architecture...................................................................................................................................3-16

3.4.1 Software Fundamentals........................................................................................................................3-163.4.2 Host Software.......................................................................................................................................3-173.4.3 Client Software.....................................................................................................................................3-18

4 Services and Networking Applications.................................................................................4-14.1 AG Networking Applications..........................................................................................................................4-24.2 TG Networking Applications..........................................................................................................................4-5

5 OAM System...............................................................................................................................5-15.1 System Architecture........................................................................................................................................5-2

HUAWEI UMG8900 Universal Media GatewayProduct Description Contents

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5.1.1 LMT Management System.....................................................................................................................5-35.1.2 Integrated NMS......................................................................................................................................5-45.1.3 MML Command Line............................................................................................................................5-4

5.2 OAM Function................................................................................................................................................5-5

6 Technical Specifications...........................................................................................................6-16.1 Performance Specifications.............................................................................................................................6-2

6.1.1 Service Processing Capability................................................................................................................6-26.1.2 Platform Switching Capability...............................................................................................................6-36.1.3 Clock Specification................................................................................................................................6-46.1.4 Voice Quality Assurance Specification..................................................................................................6-46.1.5 Reliability Specification.........................................................................................................................6-5

6.2 Supported Protocols........................................................................................................................................6-66.3 Physical Specifications....................................................................................................................................6-6

6.3.1 Power Supply and Consumption............................................................................................................6-76.3.2 Mechanical Specifications......................................................................................................................6-76.3.3 Safety Specifications..............................................................................................................................6-86.3.4 EMC Specification.................................................................................................................................6-8

6.4 Environmental Specifications.........................................................................................................................6-9

A Glossary.....................................................................................................................................A-1

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Figures

Figure 1-1 NGN networking architecture.............................................................................................................1-5Figure 2-1 Front view of an SSM-4 frame in the AC power supply....................................................................2-2Figure 2-2 Front view of an SSM-4 frame in the DC power supply....................................................................2-3Figure 3-1 Front view of an H66-22/N66-22 cabinet...........................................................................................3-2Figure 3-2 Appearance of the normalized N66-22 cabinet..................................................................................3-3Figure 3-3 Front view of an N68-22 cabinet........................................................................................................3-4Figure 3-4 Appearance of an N68E-22................................................................................................................3-5Figure 3-5 Front view of an SSM-4 frame...........................................................................................................3-6Figure 3-6 Maximum configuration in the TG application..................................................................................3-7Figure 3-7 Maximum configuration in the rear-access narrowband service access application..........................3-8Figure 3-8 Maximum configuration in the rear-access integrated access application.........................................3-9Figure 3-9 Configuration of components in the high-density rear-access cabinet.............................................3-10Figure 3-10 Maximum configuration in the front-access integrated access application....................................3-11Figure 3-11 Configuration of components in the high-density front-access cabinet.........................................3-12Figure 3-12 Front view of an SSM-4 frame.......................................................................................................3-13Figure 3-13 Board deployment in an SSM-4 frame...........................................................................................3-13Figure 3-14 Logical architecture of the SSM-4..................................................................................................3-15Figure 3-15 Software architecture of the UMG8900.........................................................................................3-16Figure 3-16 Host software architecture..............................................................................................................3-17Figure 3-17 Connections between the LMT, host, and peripherals...................................................................3-19Figure 4-1 Networking application of common user access................................................................................4-2Figure 4-2 Networking application of PBX access..............................................................................................4-3Figure 4-3 Networking application of WLL access.............................................................................................4-4Figure 4-4 Networking application of the NGN gateway exchange....................................................................4-6Figure 4-5 Networking application of the tandem exchange...............................................................................4-7Figure 4-6 Networking application of PBX access .............................................................................................4-8Figure 5-1 OAM system of the UMG8900..........................................................................................................5-2

HUAWEI UMG8900 Universal Media GatewayProduct Description Figures


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Tables

Table 2-1 UAM frames.........................................................................................................................................2-3Table 3-1 Mapping between interfaces and boards............................................................................................3-14Table 3-2 Logical module division.....................................................................................................................3-15Table 6-1 Service processing capability of a TG..................................................................................................6-2Table 6-2 Service processing capability of an AG...............................................................................................6-3Table 6-3 Service processing capability (signaling transfer)...............................................................................6-3Table 6-4 Platform switching capability..............................................................................................................6-3Table 6-5 Clock specifications.............................................................................................................................6-4Table 6-6 Voice quality assurance specifications (ATG application)..................................................................6-5Table 6-7 Reliability specifications......................................................................................................................6-6Table 6-8 Supported protocols.............................................................................................................................6-6Table 6-9 Power supply and consumption specifications of the SSM.................................................................6-7Table 6-10 Mechanical specifications..................................................................................................................6-7Table 6-11 General environmental specifications................................................................................................6-9Table 6-12 Air cleanness specifications.............................................................................................................6-10Table 6-13 Anti-vibration specifications for device running.............................................................................6-11Table 6-14 Anti-vibration specifications for device delivery.............................................................................6-12

HUAWEI UMG8900 Universal Media GatewayProduct Description Tables


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About This Document

PurposeThis document describes the orientation, features, services and functions, and networkingapplications of the UMG8900.

Related VersionsThe following table lists the product versions related to this document.

Product Name Version

HUAWEI UMG8900 V100R007

Intended AudienceThe intended audiences of this document are:

l Network planning engineer

l System engineer

l Operator of NE

Update HistoryUpdates between document versions are cumulative. Therefore, the latest document versioncontains all updates made to previous versions.

Updates in Issue 02 (2009-01-09)

Initial commercial release.

Updates in Issue 01 (2007-11-28)

Initial field trial release

OrganizationThis document describes the orientation, features, services and functions, and networkingapplications of the UMG8900.

1 Overview

HUAWEI UMG8900 Universal Media GatewayProduct Description About This Document


1

This describes the functions and orientation of the UMG8900.

2 Key Benefits

This describes the key benefits of the UMG8900.

3 System Architecture

This describes the system architecture of the UMG8900, including the physical architecture,hardware architecture, logical architecture, and software architecture.

4 Services and Networking Applications

This describes the sample networking applications supported by the UMG8900.

5 OAM System

This describes the operation, administration, and maintenance (OAM) system of theUMG8900. Operation and maintenance functions are basic requirements for subscribers tomanage and maintain the UMG8900. An easy and flexible OAM manner can reduce theoperational expenditure (OPEX) of the UMG8900.

6 Technical Specifications

This describes the common technical specifications of the UMG8900 for your retrieval andusage. The technical specifications include performance specifications, supported protocols,physical specifications, and environmental specifications.

A Glossary

Conventions1. Symbol Conventions

The following symbols may be found in this document. They are defined as follows

Symbol Description

DANGERIndicates a hazard with a high level of risk that, if not avoided,will result in death or serious injury.

WARNINGIndicates a hazard with a medium or low level of risk which, ifnot avoided, could result in minor or moderate injury.

CAUTIONIndicates a potentially hazardous situation that, if not avoided,could cause equipment damage, data loss, and performancedegradation, or unexpected results.

TIP Indicates a tip that may help you solve a problem or save yourtime.

NOTE Provides additional information to emphasize or supplementimportant points of the main text.

2. General Conventions

About This DocumentHUAWEI UMG8900 Universal Media Gateway

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Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

Boldface Names of files,directories,folders,and users are in boldface. Forexample,log in as user root .

Italic Book titles are in italics.

Courier New Terminal display is in Courier New.

3. Command Conventions


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italic.

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

{x | y | ...} Alternative items are grouped in braces and separated by verticalbars.One is selected.

[ x | y | ... ] Optional alternative items are grouped in square brackets andseparated by vertical bars.One or none is selected.

{ x | y | ... } * Alternative items are grouped in braces and separated by verticalbars.A minimum of one or a maximum of all can be selected.

[ x | y | ... ] * Alternative items are grouped in braces and separated by verticalbars.A minimum of zero or a maximum of all can be selected.

4. GUI Conventions


Boldface Buttons,menus,parameters,tabs,window,and dialog titles are inboldface. For example,click OK.

> Multi-level menus are in boldface and separated by the ">" signs.For example,choose File > Create > Folder .

5. Keyboard Operation


Key Press the key.For example,press Enter and press Tab.

Key1+Key2 Press the keys concurrently.For example,pressing Ctrl+Alt+Ameans the three keys should be pressed concurrently.

HUAWEI UMG8900 Universal Media GatewayProduct Description About This Document


3


Key1,Key2 Press the keys in turn.For example,pressing Alt,A means the twokeys should be pressed in turn.

6. Mouse Operation

Action Description

Click Select and release the primary mouse button without moving thepointer.

Double-click Press the primary mouse button twice continuously and quicklywithout moving the pointer.

Drag Press and hold the primary mouse button and move the pointerto a certain position.

About This DocumentHUAWEI UMG8900 Universal Media Gateway

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1 Overview

About This Chapter

This describes the functions and orientation of the UMG8900.

1.1 Basic FunctionsThis describes the basic functions of the UMG8900.

1.2 Product OrientationThis describes the product orientation of the UMG8900.

1.3 NGN EvolutionThis describes the next generation network (NGN) evolution based on the orientation of theUMG8900.

HUAWEI UMG8900 Universal Media GatewayProduct Description 1 Overview


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1.1 Basic FunctionsThis describes the basic functions of the UMG8900.

The UMG8900 converts service bearers, enables interworking between bearers, and processesservice stream formats. The UMG8900, based on the standard next generation network (NGN)architecture, is key device in the NGN solution provided by Huawei.It can help carriers to builda low-cost, profitable, and future-oriented communication network.

The UMG8900 provides the following basic functions:l G.711A/G.711µ/G.723.1/G.726/G.729 voice codecs and codec conversion

l Voice quality assurance technologies such as echo cancellation (EC), voice activitydetection (VAD), comfort noise generation (CNG), and packet loss concealment (PLC)

l Announcement playing, digit collecting and sending, tone file loading, and announcementresource providing

l Embedded signaling gateway (SG) function, adapting and forwarding signaling from thetime division multiplexing (TDM) bearer to the Internet Protocol (IP) bearer and reducingthe networking complexity

l Dual-homing function, enabling the UMG8900 to automatically switch to the slave mediagateway controller (MGC) without interrupting services if the master MGC fails

l Virtual media gateway (VMGW) function, configuring a UMG8900 to multiple mediagateways (MGWs) with independent logical functions.

For details, see 2.2 Powerful Service Functions.

1.2 Product OrientationThis describes the product orientation of the UMG8900.

The UMG8900 is based on the standard next generation network (NGN) architecture. It is thecrucial device in the NGN solution provided by Huawei.

The UMG8900 is of flexible configuration, and thus can serve as the following service gatewaysat the access layer in the NGN:

l Trunk gateway (TG)

l Access gateway (AG)

l Embedded signaling gateway (SG)

l NGN-enabled switch

l Video interworking gateway (VIG)

l Integrated application of the AG, TG, SG, and VIG

l Extended integration of fixed and mobile network services

The following describes the applications.

TG ApplicationThe TG, located at the edge access layer of the NGN, connects with the public switched telephonenetwork (PSTN) and the NGN and accesses PSTN services to the NGN.

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The TG converts formats and bearer modes for service streams from the PSTN to the packetswitched network. The TG supports various voice services and narrowband data services.

The UMG8900 can work as a TG in the NGN and support bearer conversion from time divisionmultiplexing (TDM) to Internet Protocol (IP)/asynchronous transfer mode (ATM) packetnetworks, voice codecs such as G.711, G.723, G.726, and G.729, and fax and modem services.

The UMG8900 also supports the embedded SG function to adapt and forward the narrowbandsignaling to a broadband packet network. It supports the standard Signaling Transport(SIGTRAN) protocol, and thus can reduce the networking complexity and the capitalexpenditure (CAPEX) for a network.

When the UMG8900 acts as a TG, it supports interworking of voice services between two IPnetworks. In this case, the UMG8900 provides the IP interworking gateway function, and theIP address planning in the two IP networks can be the same or different. The UMG8900 convertsthe IP addresses and the transport protocol ports between the two networks.

AG Application

The AG, located at the edge access layer of the NGN, provides access for various types ofservices to implement dense access of voice service subscribers. In addition, the AG can connecttraditional PSTN subscribers of the private branch exchange (PBX), V5 access network, andprimary rate interface (PRI).

The AG converts the narrowband voice and data streams into the formats that can be transferredin IP packet networks.

The UMG8900 can serve as an AG in the NGN and support narrowband and broadbandintegrated access services.

The UMG8900, acting as an AG, supports the StandAlone function. That is, if thecommunication between the UMG8900 and the softswitch is interrupted, the UMG8900 canprovide basic voice call services and generate bills for subscribers connected. At present, theUMG8900 supports plain old telephone service (POTS) subscribers in user access module(UAM) or V5 access mode.

NGN-Enabled Switch

The UMG8900 supports flexible hardware configuration. It also supports configuration of TDMand IP trunks at a random ratio.

The UMG8900 supports multi-frame cascading, high-capacity TDM switching, and TDM-trunk-only application. The UMG8900 can work with the MGC to serve as an NGN-enabledswitch in the PSTN and support C5/C4 applications.

Embedded SG Application

The SG, located at the edge access layer of the NGN, connects traditional PSTN narrowbandnetworks and transfers the signaling in the PSTN to the NGN for the interworking on call controlplanes between networks.

The SG provides traditional narrowband network interfaces and relevant standard signaling suchas Signaling System Number 7 (SS7) to connect with narrowband telecommunication devices.The SG provides packet network interfaces and the standard SIGTRAN protocol to connect withthe NGN devices and transfer narrowband signaling on IP packet networks.



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The UMG8900 supports the embedded SG function. If no independent SG or signaling transferpoint (STP) exists in the network, the embedded SG of the UMG8900 can be used for thenetworking.

The UMG8900 supports adaptation protocols such as MTP2 User Adaptation (M2UA),Integrated Services Digital Network (ISDN) Q.921-User Adaptation Layer (IUA), and V5 UserAdaptation (V5UA). It can adapt the IP packets and transfer SS7, ISDN signaling, and V5protocol.

Integrated ApplicationThe UMG8900 can serve as an AG, or a TG independently and provide their service functionsat the same time to implement service convergence and reduce network construction CAPEX.

The UMG8900 is designed with flexible hardware and software architectures. It supportsintegrated services of fixed networks and mobile networks by software upgrade, where the twokinds of networks share the same core IP bearer network.

NOTE

The UMG8900 must work with the MGC to act as an NGN-enabled switch. This NGN-enabled switch issimilar to a TG in a tandem/gateway exchange and an AG in a local exchange.

1.3 NGN EvolutionThis describes the next generation network (NGN) evolution based on the orientation of theUMG8900.

Current SituationDevelopment of the communication technology promotes integration of the telephony network,computer network, and cable TV network. Due to variety of demands on services, carriers mustprovide more services to attract and keep customers.

The current network architecture is simple and a long time is required to introduce new services.As the trend is to provide integrated services based on IP packets, a network architecture thatcan suit this requirement is desired.

The NGN is a kind of service-driven network. It realizes the service system relativelyindependent of the network through the separation of service and call control, and the separationof call control and bearer.

This open architecture can meet the ever-increasing demands on services, strengthen thecompetitiveness of operation networks, and realize continuous development.

Figure 1-1 shows the NGN networking architecture.


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Figure 1-1 NGN networking architecture

IP/ATM

PSTN

IP/ATM

IN MRS APP Server OSS Location Server

SG

STP

LE

AG

IAD E-Phone

SIP

TG

SoftSwitch

SoftSwitch

MGW

BSC/RNC

INAPH.248/

MGCP/SIP

PARLAY/SIP

SNMP/MML TRIP

H.248

H.248/MGCP

H.248/MGCP SIP/

H.323

SIP/H.323

TUP/ISUP

H.248SIGTRAN

SSP: signaling switching point PSTN: public switched telephone network LE: local exchangeTUP: Telephone User Part UMTS: universal mobile

telecommunications systemSG: signaling gateway

TG: trunk gateway AG: access gateway IAD: integrated access deviceINAP: IN Application Protocol IN: intelligent network MRS: media resource serverOSS: operating support system SIGTRAN: Signaling Transport Protocol SIP: Session Initiation ProtocolSNMP: Simple NetworkManagement Protocol

MML: man-machine language MGCP: Media GatewayControl Protocol

MGW: media gateway Softswitch: softswitch device BSC: base station controllerPLMN: public land mobilenetwork

TRIP: Telephone Routing Protocol basedon IP

The NGN can be divided into four layers, namely, service management, call control, packetswitching, and edge access. The whole network transmits and switches service data in IP packetmode.

The following describes major entities in the NGN.

l SoftswitchThe softswitch serves as the call processing center in NGN. It supports narrowband andbroadband call control signaling such as Signaling System Number 7 (SS7), DigitalSubscriber Signal No.1 (DSS1), V5, H.323, and Session Initiation Protocol (SIP).The softswitch controls gateway devices such as the trunk gateway (TG), access gateway(AG), integrated access device (IAD), Ethernet phone (E-Phone), and media resourceserver (MRS) through H.248 and Media Gateway Control Protocol (MGCP) for relatedcall service processing.



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The softswitch connect with the application servers at the service management layerthrough standard and open interfaces, enabling fast and flexible access for new services.

l NMS and OSS

The network management system (NMS) manages and maintains the whole network, andmonitors status of all devices in the network. The NMS manages network elements (NEs)through the standard network management interfaces such as the Simple NetworkManagement Protocol (SNMP).

The operation support system (OSS) is responsible for service release, charging, andsubscriber line test management. It usually works with the NMS to implement its functions.

l Service node

The service node refers to an application server at the service management layer. It can bea traditional service control point (SCP) in the intelligent network (IN) or an applicationserver (App Server) in the NGN.

The traditional IN device and the softswitch implement traditional intelligent services bythe Intelligent Network Application Protocol (INAP). These intelligent services are usedin the initial establishment of the NGN and can inherit the traditional intelligent serviceresources.

The App Server is an application server under the NGN architecture. It interacts with thesoftswitch through SIP. It also provides open third-party interfaces for external use. Thisopen service providing mode helps to introduce third-party services.

l TG

The TG achieves interworking between the NGN core network and the traditional PSTN.

The interfaces on the PSTN side work in TDM mode, and the interfaces on the NGN corenetwork side work in IP/ATM mode. The TG converts media streams from the TDM modeto the IP/ATM mode.

The TG interacts with the softswitch through H.248 or MGCP. Controlled by the softswitch,the TG sets up and disconnects calls and implements other services.

l SG

The converts the PSTN signaling between the TDM bearer mode and the IP packet mode.

The SG converts the PSTN signaling over TDM to IP/ATM packets based on SignalingTransport (SIGTRAN) and sends the signaling to the softswitch for processing. At the sametime, the SG receives the packet signaling from the softswitch and converts it to the TDMmode.

The SG can be an independent device or embedded in the TG.

l AG

The AG provides the narrowband and broadband service access function.

The AG transfers subscriber line data such as voice, modem, and fax over the NGN corenetwork through conversion of media streams.

The AG interacts with the softswitch through H.248 or MGCP. Controlled by thesoftswitch, the AG reports the status of the subscriber line and completes call processing.

l NGN terminal equipment

The NGN terminal equipment includes E-Phone, IAD, and video terminals. The E-Phoneand the IAD serve as a small AG, connecting one or multiple users.

The video terminal interacts with the softswitch through H.323 or SIP, processing videoand voice calls.


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l MRSThe MRS provides intelligent services such as announcement playing, digit collecting,recording, and audio mixing. Its function is equal to the intelligent peripheral (IP) in thetraditional IN.Controlled by the softswitch through H.248, MGCP, or SIP, the MRS provides multipleintelligent services based on voice or video.

Network EvolutionAs an integrated, large-capacity, and carrier-class gateway device, the UMG8900 supports seriesof hardware and smooth evolution for the sake of carriers' capital expenditure (CAPEX).

The UMG8900 realizes expansion and upgrade of the C4/C5 exchange in the existing PSTN byserving as an NGN-enabled switch and working with the softswitch.

The UMG8900 adopts the Bearer Independent Call Control Protocol (BICC)architecture. Itconnects with the softswitch through standard interfaces. When networks evolve into the NGN,the UMG8900 serving as a C4 exchange can be smoothly upgraded to a TG and theUMG8900 serving as a C5 exchange can be upgraded to an AG. The IP-based core network canbe achieved.

Only software upgrade is required during the evolution while the UMG8900 hardware can stillperform its usual functions.



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2 Key Benefits

About This Chapter

This describes the key benefits of the UMG8900.

The UMG8900 supports flexible configuration and networking applications. The key benefitsof the UMG8900 include:

2.1 Series of Hardware PlatformsThis describes the service switching module (SSM) and user access module (UAM).

2.2 Powerful Service FunctionsThis describes the powerful service functions of the UMG8900.

2.3 Advanced Voice Quality Assurance TechnologiesThis describes the advanced voice quality assurance technologies of the UMG8900.

2.4 Carrier-Class Security and ReliabilityThis describes the carrier-class security and reliability of the UMG8900.

2.5 Easy Installation and MaintenanceThis describes the easy installation and maintenance of the UMG8900.

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2.1 Series of Hardware PlatformsThis describes the service switching module (SSM) and user access module (UAM).

2.1.1 SSM-4 Hardware PlatformThis describes the SSM-4 hardware platform.

2.1.2 UAM Series of Hardware PlatformsThis describes the user access module (UAM) series of hardware platforms.

2.1.1 SSM-4 Hardware PlatformThis describes the SSM-4 hardware platform.

The SSM, core unit of the UMG8900, implements convergence, switching, processing, andforwarding of service streams, provides interfaces with the softswitch, and exchanges gatewaycontrol messages.

The SSM-4 frame can provide the service switching function and act as a trunk gateway (TG)independently. The SSM-4 frame is the standard 19-inch frame supporting both AC and DCpower supply.

Figure 2-1 shows the front view of an SSM-4 frame in the case of AC power supply.

Figure 2-1 Front view of an SSM-4 frame in the AC power supply

Figure 2-2 shows the front view of an SSM-4 frame in the case of DC power supply.

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Figure 2-2 Front view of an SSM-4 frame in the DC power supply

The SSM-4 frame is of 5 U in height and provides five board slots. When the UMG8900 actsas a TG, the SSM-4 frame can be placed on the desktop or in an N68-22, H66-22, or N66-22cabinet. When the UMG8900 acts as an AG, the SSM-4 frame is installed together with UAMframes in an N66-22 or H66-22 cabinet provided by Huawei.

2.1.2 UAM Series of Hardware PlatformsThis describes the user access module (UAM) series of hardware platforms.

The UAM provides the user access function. Connected through time division multiplexing(TDM), the SSM and the UAM communicate through internal protocols. The UAM is configuredonly when the UMG8900 acts as an access gateway (AG).

The UMG8900 supports series of UAM frames to meet different networking requirements.Table 2-1 lists the supported UAM frames.

Table 2-1 UAM frames

Name Function Remarks

HABA It is a high-density rear-access master frame with 36slots, supporting 30 serviceslots.

It supports broadband andnarrowband access andindependent uplink ofbroadband services.

HABB It is a high-density rear-access slave frame with 36slots, supporting 30 serviceslots.

It works with the HABA andis managed by the HABA.

HABD It is high-density front-accessmaster frame with 18 slots,supporting 12 service slots.

It supports broadband andnarrowband access andindependent uplink ofbroadband services.

HABE It is a high-density front-access slave frame with 18slots, supporting 14 serviceslots.

It is managed and controlledby the HABD.



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HABF It is a high-density front-access extended frame with18 slots, supporting 18service slots.

It cannot workindependently. The HABDor the HABE must providepower mutual-aid andmanagement for the HABF.

HABL It is a small-capacity serviceframe with 12 slots,supporting 5 service slots.

It works independently.

UAFM It is a front-access unifiedadministration master frame.

It must be inserted with theIPMA broadband maincontrol board and the relatedsubscriber board to providebroadband services.

UAFS It is a front-access unifiedadministration slave frame.

It can work as the sub frameof the UAFM or connect withthe SSM directly.

UAM It is a rear-access unifiedadministration master frame.

It must be inserted with theIPMA broadband maincontrol board and the relatedsubscriber board to providebroadband services.

UAS It is a rear-access unifiedadministration slave frame.

It can work as the sub frameof the UAM or connectdirectly with the SSM.

RSP_60A It is a narrowband accessframe using the RSP maincontrol board.

It supports two subscriberboards.

RSP_160B It is a narrowband accessframe using the RSP maincontrol board.

It supports two subscriberboards.

RSP_10 It is a narrowband accessframe using the PV8/RSPmain control board.

It can work as a master frameif the PV8 is used, or as a subframe or a direct frame if theRSP is used, supporting 10subscriber boards.

RSP_12 It is a narrowband accessframe using the PV8/RSPmain control board.

It can work as a master frameif the PV8 is used, or as a subframe or a direct frame if theRSP is sued, supporting 12subscriber boards.

RSP_14 It is a narrowband accessframe using the RSP maincontrol board.

It can work as a sub frame ora direct frame, supporting 14subscriber boards.


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RSB It is a narrowband accessframe using the RSA maincontrol board.

It can work as a direct frame,supporting 16 subscriberboards.

RSB_HK It is a narrowband accessframe using the RSA maincontrol board.

It can work as a direct frame,supporting 12 subscriberboards.

RSA_22 It is a narrowband accessframe using the RSA maincontrol board.

It can work as a direct frame,providing subscriberinterfaces through thecascaded USR frame.

RSA_26 It is a narrowband accessframe using the RSA maincontrol board.

It can work as a direct frame,providing subscriberinterfaces through thecascaded USR frame.

USR_16 It is a narrowband accessframe using the DRV drivingboard.

It can work as the cascadedframe of the RSA, supporting16 subscriber boards.

USR_19 It is a narrowband accessframe without a main controlboard.

It can work as the cascadedframe of the RSA, supporting19 subscriber boards.

2.2 Powerful Service FunctionsThis describes the powerful service functions of the UMG8900.

The UMG8900 acts as a bearer device for voice and narrowband data services in the corenetwork. It transmits service streams and converts formats of service streams between mobileand fixed networks and within fixed networks. For two networks that fully adopt the IPtransmission technology, service interworking between the IP networks can be realized by meansof domains.

The UMG8900 provides the service bearer processing function and the service stream formatconversion function. By networking with the media gateway controller (MGC), theUMG8900 provides basic, supplementary, and intelligent network (IN) services.

The UMG8900 supports the following functions:

l G.711A/G.711u/G.723.1/G.726/G.729 voice codecs, and IP-based transmission of G.711A/G.711u/G.723.1/G.726/G.729 voice codecs



2-5

l Voice quality assurance technologies such as acoustic and electric echo cancellation (EC),voice activity detection (VAD), background noise suppression, comfort noise generation(CNG), automatic gain control (AGC), and packet loss concealment (PLC)

l Detection and generation of DTMF signals, and RFC2198 redundancy and RFC2833detection

l Various QoS assurance methods such as the setting of voice and data service priorities,dynamic jitter buffer, IP ToS, DSCP, 802.1P/Q, and VLAN priority

l Announcement playing and digit collecting and can dynamically load tone files. Afterloading the tone files that are adaptable towards syntax adaptation, the MGW can playintelligent tones about integers, numbers, time, durations, dates, and sums of money indifferent languages. The MGW can work with the NMS to manage the tone files in acentralized manner. The MGW can work with the NMS to manage the tone files in acentralized manner.

l Embedded SG function, adapting and forwarding signaling from the TDM bearer to the IPbearer based on M2UA/M3UA/IUA/V5UA to reduce the complexity of networking

l Adaptation of SS7 CCS, and adaptation and termination of CAS such as R1, R2, R1.5, andInternational No.5

l Audio mixing, working with the MGC to support the MPTY

l Dual-homing function, enabling the UMG8900 to automatically switch to the slave MGCwithout interrupting services if the master MGC fails

l SCTP multi-homing feature. Multi-homing in SCTP refers to supporting multiple IPaddresses. That is, the two sides can have multiple addresses in an association, to providemore reliable end-to-end multi-path transmission mechanism for the upper layersubscribers.

l VMGWA virtual media gateway (VMGW) is a logical MGW. Multiple VMGWs can be integratedphysically. The UMG8900 supports the VMGW function. An UMG8900 can be configuredto multiple VMGWs with independent logical functions. The VMGWs are identified bythe VMGW ID and are managed by different softswitches. The bearer resources of thephysical MGW can be allocated to different VMGWs in exclusive or resource-sharingmode so that the flexibility of the UMG8900 is enhanced.

l LicenseTraditional expansion is through the adding of hardware. You can buy different numbersof frames and boards to reach corresponding capacities. In addition, you may want tooperate a small system with less investment at the initial stage of network construction.Therefore, a method through software, namely, License, is required to provide moreaccurate capacity control.In addition, you can acquire enhanced functions and services by buying License. With theLicense function, you can flexibly choose the network functions that fit a specific stagebased on actual needs. Thus, your investment can be returned to the most extent.

l Upgrade without service interruption, that is, upgrading the UMG8900 without affectingservices

l File transmission from the version server to the BAM of the UMG8900 through TFTP/FTP

l SSH server function, ensuring the data integrity and reliability and implementing remoteuser login and access

l Labeling function in the MPLS protocol, improving the fast packet forwarding capabilityand ensuring the QoS


Product Description


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l Working with the MGC to support the H.248.11 overload control protocol and the H.248.10congestion control protocol, supporting the self overload protection function, andimproving the completeness and stability of MGW protocols

l End-to-end full-flow tracing function based on cooperation with the NMS and related NEs,helping to quickly locate faults and shortening the troubleshooting time

l Time localization function, enabling you to set the time based on the time zone where theUMG8900 is located and set the daylight saving time

l IP interworking within the MGW, looping back IP interfaces of IP terminations within theMGW without connecting routers or layer 3 switches but reducing the cost

l T.38 fax, fax over G.711, modem over G.711 (supporting V.152 voice band data), and RTPredundancy

l H.263/H.264/MPEG-4 video codec, H.245 video call control and H.223 video servicemultiplexing in VIG applications

l POTS interfaces, ISDN interfaces (2B+D), DDN interfaces, and 2-wire/4-wire audiodedicated line interfaces in AG application to provide narrowband user access

l DID service and CID service in DTMF mode and FSK mode, and message waitingindication service in voltage ascending mode and FSK mode

l Traditional PSTN services such as AOCE and the hotline service

l StandAlone function in AG application. If the UMG8900 is disconnected from thesoftswitch, subscribers under the AG can still make basic voice calls. The connected callslast for the preset release interval of which the default value is 30 minutes.

l Bill generating. When the StandAlone function in the AG application is enabled, theUMG8900 can record and generate bills for basic voice service calls of connectedsubscribers, and send the bills to the iGWB. After the UMG8900 recovers communicationwith the softswitch, the StandAlone function is disabled, but the calls set up through theStandAlone can be held.

l Both hairpin and non-hairpin service connection modes. Through the hairpin connectionmode, the UMG8900 can reduce roundabout traffic and improve the QoS.

l Accessing DCME based on ITU-T Q.50

l PPPoE client function

l FE and GE interfaces supporting the ISIS function

l Network time synchronization, through which the UMG8900 clock keeps consistent withother NE clocks through SNTP

l Integrated video and voice services, flexible and expandable software and hardwarearchitectures, and expanded services through software upgrade

l Open Mc interface, and interconnection with MGCs of other suppliers

2.3 Advanced Voice Quality Assurance TechnologiesThis describes the advanced voice quality assurance technologies of the UMG8900.

The UMG8900 implements service stream bearer and transfer between the TDM network andthe IP packet network. The common causes degrading the voice quality in the IP packet networkinclude delay, jitter, packet loss, and echo.

The UMG8900 decreases delay and jitter through the dynamic buffering technology, reduceseffect of packet loss on the voice quality by the packet loss concealment (PLC) technology, and



2-7

clears echo through the echo cancellation (EC) technology. The UMG8900 further improves thevoice quality through the voice activity detection (VAD) and comfort noise generation (CNG)technologies.

In packet service transmission, the UMG8900 supports priority of IP packet service streams andimplements hierarchical transmission of different service streams by working with the bearernetwork to provide reliability protection.

The UMG8900 supports the multi-protocol label switching virtual private network (MPLSVPN). The UMG8900 can serve as a customer edge (CE) device to connect to the MPLS VPN,improve the voice packet forwarding speed by the assistance of the MPLS network, and bettercarry out the quality of service (QoS) traffic project.

The UMG8900 holds a leading position in the industry in voice quality enhancementspecifications. Its technology provides a voice quality that is next to that of the public switchedtelephone network (PSTN).

2.4 Carrier-Class Security and ReliabilityThis describes the carrier-class security and reliability of the UMG8900.

SecurityThe security management of the UMG8900 focuses on two aspects: control data, and operationand maintenance (O&M).

l Control data securityThe UMG8900 supports backup of important data at the system level. For example, youcan back up configuration data, running data, statistic information, operation information,management information, and running logs to the hard disk or the compact disk.The UMG8900 interworks with the softswitch through H.248. The UMG8900 performsthe H.248 based authentication header (AH) authentication and the IP Security Protocol(IPSec) based encryption on H.248 messages.

l O&M securityThe UMG8900 defines user groups and rights. Different user groups can customizedifferent command sets. Through the configuration of command groups and users, thesystem can effectively implement hierarchical management of operators and operationrights.When the authorized users operate on the UMG8900, the UMG8900 checks dataconsistency and provides prompt and confirmation about operations. This avoids possibledamage due to improper operations.Network and device management can protect your password and make unauthorized accessinvalid. Service data can be accessed only in certain condition. The UMG8900 ensures thatonly authorized users can obtain correct data.The access control list (ACL) helps to configure the firewall to filter messages of ports thatdo not provide services. Thus, the UMG8900 can prevent attackers from finding systemholes through the port scanning technique.The O&M interface adopts the maintenance dual plane to connect with the localmaintenance terminal (LMT) or the integrated network management system (NMS) toavoid single point failure on the UMG8900 side. In addition, the UMG8900 supports IPSecbased encryption on O&M messages to improve the management security.


Product Description


Issue 02 (2009-01-09)

ReliabilityThe UMG8900 ensures the system reliability through the following:

l The service resource boards work in resource pool mode to share all the resources.

l The UMG8900 supports resource check. It verifies the validity of bearer and serviceresources through resource check and reclaims the resources occupied by junk sessions intime.

l The UMG8900 supports the dual-homing function. If the master media gateway controller(MGC) fails, the UMG8900 switches to the slave MGC to ensure the normal running ofservices.

2.5 Easy Installation and MaintenanceThis describes the easy installation and maintenance of the UMG8900.

Installationl The UMG8900 adopts standard 19-inch cabinets for the convenience of deployment and

expansion.l All boards support hot plugging. The indicators on the front panels of the boards can show

the working status of the boards and the interfaces.l A clear identifier is labeled on each functional module. As each functional module provides

standardized joints and external subscriber interfaces, no special tools are required ininstallation.

Maintenancel The UMG8900 supports local maintenance, remote maintenance, and various management

methods such as the man-machine language (MML) and graphic user interface (GUI)combined interface, iManager network management system (NMS), and secure shell(SSH).

l The graphic interface provides powerful online help and easy operation.

l The UMG8900 supports online report of hardware and software versions, online softwareloading, and online patch installation. These functions achieve software upgrade andmaintenance without affecting the system running.

l The UMG8900 supports version consistency check, version authentication of frontadministration module (FAM) and back administration module (BAM), and versionrollback.

l The UMG8900 provides logs, alarms, performance measurement, and fault diagnosisfunctions, facilitating fault prevention, location, and troubleshooting.

l The UMG8900 provides tools for information collection, integrity check, and log analysis,and supports online and offline analysis and maintenance on the running information.

l The alarm box of the UMG8900 can display visual alarm information and notify themaintenance personnel of alarms by phone.



2-9

3 System Architecture

About This Chapter

This describes the system architecture of the UMG8900, including the physical architecture,hardware architecture, logical architecture, and software architecture.

3.1 Physical ArchitectureThis describes the physical architecture of the UMG8900, including the cabinet appearance andthe frame appearance.

3.2 Hardware ArchitectureThis describes the hardware architecture of the UMG8900, including architectures andconfigurations of cabinets and frames.

3.3 Logical ArchitectureThis describes the logical architecture.

3.4 Software ArchitectureThis describes the software architecture of the UMG8900, including the software fundamentals,host software, and client software.

HUAWEI UMG8900 Universal Media GatewayProduct Description 3 System Architecture


3-1

3.1 Physical ArchitectureThis describes the physical architecture of the UMG8900, including the cabinet appearance andthe frame appearance.

3.1.1 Cabinet AppearanceThis describes the cabinet appearances and features of the UMG8900.

3.1.2 Frame AppearanceThis describes the frame appearances and features of the UMG8900.

3.1.1 Cabinet AppearanceThis describes the cabinet appearances and features of the UMG8900.

The UMG8900 supports two types of cabinets: front-access cabinet and rear-access cabinet. TheH66-22 cabinet and normalized N66-22 cabinet are used as the front-access cabinet, and theN66-22 cabinet, normalized N66-22 cabinet, N68-22 cabinet and N68E-22 cabinet are used asthe rear-access cabinet.

H66-22/N66-22 CabinetsFigure 3-1 shows the front view of an H66-22/N66-22 cabinet.

Figure 3-1 Front view of an H66-22/N66-22 cabinet

3 System ArchitectureHUAWEI UMG8900 Universal Media Gateway

Product Description


Issue 02 (2009-01-09)

The H66-22 cabinet is a front-access cabinet. It can be installed against the wall or installed inthe back-to-back mode with another H66-22 cabinet. The power distribution frame and theenvironment monitoring frame are configured on the top of the H66-22 cabinet.

The N66-22 cabinet is a rear-access cabinet. The cables of the subscriber frames must beconnected to the backplane and laid out from the back of the cabinet. The power distributionframe is configured on the top of the N66-22 cabinet, and the environment monitoring frame isconfigured at the bottom. The cabling frame is configured to bind cables, and the fan frame isconfigured to control the temperature inside the cabinet.

The H66-22 cabinet uses double door leaves for the front door, saving the installation space.The N66-22 cabinet uses double door leaves for both front door and rear door, facilitatingoperations on the UMG8900. Side panels are hung on the cabinet, facilitating installation. Boththe front doors and bottom plate have minute air vents and are lined with air filters inside. Thefront-in, back-out, and bottom-to-top ventilation modes inside the cabinet realize excellent heatdissipation and dustproof functions.

Normalized N66-22 Cabinets

Figure 3-2 shows the appearance of the normalized N66-22 cabinet.

Figure 3-2 Appearance of the normalized N66-22 cabinet



3-3

The normalized N66-22 cabinet can be used as a front-access cabinet as well as a rear-accesscabinet.

The front mount angles in the cabinet are used to fix internal components. The grounding pointson the back mount angles are used for grounding of internal components and connections ofprotection ground (PGND) cables between cabinets.

The front door and the back door are single-leaf doors with locks on the left side. The side panelsare externally fixed with screws.

The N66-22 cabinet can be installed either on the ESD-preventive floor or on the cement floordirectly. When the N66-22 cabinet is installed on the ESD-preventive floor, the N6X supportsmust be used.

N68-22 Cabinets

Figure 3-3 shows the front view of an N68-22 cabinet.

Figure 3-3 Front view of an N68-22 cabinet

The N68-22 cabinet provides 46 U inside space (1 U = 44.45 mm = 1.75 in.). It comprises thepower distribution frame, semi-integrated SSM frame, cabling trough, filler panel, rack, guiderail, and side hang fiber coiler. It conforms to IEC297 standards and meets the requirement forflexible module configuration.


Product Description


Issue 02 (2009-01-09)

The N68-22 cabinet can be in front-access and rear-access modes and support upward anddownward cabling. Therefore, the N68-22 cabinet can be placed and connected with cables basedon the actual conditions of the equipment room.

In addition, the N68-22 cabinet adopts the standard 19-inch structure. Other frames of thestandard 19-inch structure can be placed in free space of the cabinet to improve the utilizationof the equipment room.

N68E-22 Cabinets

Figure 3-4 shows the appearance of an N68E-22 cabinet.

Figure 3-4 Appearance of an N68E-22

The N68E-22 cabinet is the enhanced model of the N68-22 cabinet. Its specifications such asdimensions are the same as those of the N68-22 cabinet. The difference is that the N68E-22cabinet is equipped with only one door and the installation is easier.



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3.1.2 Frame AppearanceThis describes the frame appearances and features of the UMG8900.

The UMG8900 supports the SSM-4 frame to provide the service switching function. The SSM-4frame is a standard 19-inch frame supporting both AC and DC power supply.

Figure 3-5 shows the front view of an SSM-4 frame.

Figure 3-5 Front view of an SSM-4 frame

The SSM-4 frame is of 5 U in height and provides 5 board slots. It can be placed on the desktopor in the N68-22, H66-22, and N66-22 cabinets provided by Huawei.

3.2 Hardware ArchitectureThis describes the hardware architecture of the UMG8900, including architectures andconfigurations of cabinets and frames.

3.2.1 Cabinet ArchitectureThis describes the architectures and configurations of cabinets supported by the UMG8900.

3.2.2 Frame ArchitectureThis describes the frame architectures of the UMG8900.

3.2.3 External InterfacesThis describes the external interfaces provided by the UMG8900, including trunk interfaces ,gateway control interfaces, and operation and maintenance interfaces.

3.2.1 Cabinet ArchitectureThis describes the architectures and configurations of cabinets supported by the UMG8900.

Trunk GatewayOnly service switching modules (SSMs) are configure when the UMG8900 serves as a trunkgateway (TG). The components inside the cabinet include the power distribution frame (PDF),environment monitoring box, SSM frame, and cabling rack. Figure 3-6 shows the maximumconfiguration, where a single frame supports access of up to 1440 trunks.


Product Description


Issue 02 (2009-01-09)

Figure 3-6 Maximum configuration in the TG application

SSM

Filler panel

SSM

SSM

1U

1U

1U

2U

2U

4U

6U

6U

5U

5U

5U

1UPower distribution frame 2U

Environment monitoring box1U1U

2U1U

Cabling rack

Cabling rack

Cabling rack

Cabling rackFiller panel

Filler panel

Filler panel

Filler panel

Filler panel

Filler panel

Cabling rack

Access GatewayBoth SSMs and user access modules (UAMs) are configured when the UMG8900 serves as anaccess gateway (AG).

If low-density UA frames are configured and the UMG8900 accesses only narrowband services,only narrowband user access frames can be configured, namely, RSP-10 frames and RSP-14frames. The UMG8900 supports configuration of up to three N66-22 cabinets. Figure 3-7 showsthe maximum configuration.



3-7

Figure 3-7 Maximum configuration in the rear-access narrowband service access application

SSM 5U

Cabling through

1U1U

RSP14(1) 6U

RSP10 6U

1U

Power distributionframe 2U

1U2U2U1UFiller panel 1U1UFan frame 1U

RSP10 6URSP10 6U

RSP14(1) 6URSP14(1) 6U

RSP14(2) 6URSP14(2) 6U

RSP14(2) 6U

RSP14(3) 6URSP14(3) 6U

RSP14(4) 6URSP14(4) 6U

RSP14(3) 6U

RSP14(4) 6U

2U2U

6U6U

2U2U

2U 2U

2U

1UEnvironment

monitoring box 2U

Power distributionframe


Filler panel Filler panelFan frame Fan frame 1

Filler panelFan frame 2

Filler panel

Filler panel

Filler panel

Filler panel

Filler panelEnvironment

monitoring boxEnvironment

monitoring box

Filler panel

When the UMG8900 provides only narrowband services, the UAM mainly accesses plain oldtelephone service (POTS)/integrated services digital network (ISDN) subscribers. The maincontrol frame is an RSP-10 frame, and the main control board is the PV8. Sub frames are RSP-14frames cascading with the main control frame. The RSP-10 frame can cascade with up to fourRSP-14 frames.

Assume the UMG8900 accesses POTS subscribers. In the standard configuration, the RSP-10frame holds 10 subscriber boards supporting 32 access channels. The RSP-14 frame holds 14subscriber boards supporting 32 access channels. Thus, the number of POTS subscriberssupported in the standard configuration is (10 + 14 x 4) x 32 x 3 = 6336.

If only one power board is installed in the RSP-10 frame, a subscriber board can be added. Thus,the maximum number of supported POTS subscribers is 6336 + 32 x 3 = 6432.

If the UMG8900 accesses ISDN subscribers, each subscriber board can connect up to eight ISDNsubscribers. The maximum number of ISDN subscribers supported in the standard configurationis 6336/4 = 1584.


Product Description


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When the UMG8900 serves as an AG, it supports broadband and narrowband integrated access.In this case, the UAM uses the broadband and narrowband integrated access frames configuredin main/sub mode.

If low-density rear-access integrated access frames are configured, the N66-22 cabinet isadopted. The related subscriber frames are the UAM and the UAS. Figure 3-8 shows themaximum configuration.

Figure 3-8 Maximum configuration in the rear-access integrated access application

SSM 5U

6U

6U

1U

Power distributionframe 2U2U2U

1UFan frame 1U

6U6U

6U6U

6U6U 6U

6U6U

6U6U

6U

6U

2UFiller panel 2U

6U6U

2UEnvironmentmonitoring box 2U

2U

2U

UAM

UAS(1)

UAS(2)

UAS(3)

UAS(4)

UAMUAM

1U1UCabling frame 1U

UAS(1)UAS(1)

1U1U 1U

UAS(2)UAS(2)

UAS(3)UAS(3)

1U1U 1U

UAS(4)UAS(4)

1U



Fan frame Fan frame

Cabling frame Cabling frame

Fan frame Fan frame Fan frame

Fan frame Fan frame Fan frame

Filler panel Filler panel

Filler panel

Filler panel Filler panel

Environmentmonitoring box

Environmentmonitoring box

When the UMG8900 adopts integrated access frames and serves as an AG, it supports bothnarrowband POTS/ISDN user access and broadband asymmetric digital subscriber line (ADSL)user access.

A UAM frame supports eight subscriber boards. If only one power supply is configured, a UAMframe can support up to nine subscriber boards. A UAS frame supports 12 subscriber boards. Ifonly one power supply is configured, a UAS frame can support up to 13 subscriber boards.

In an integrated access frame, either a narrowband subscriber board or a broadband subscriberboard can be inserted in a slot.



3-9

The maximum number of POTS subscribers supported in the standard configuration is

(8 + 12 x 4) x 32 x 3 = 5376.

If only one power supply is configured, the maximum number of POTS subscribers supportedis

5376 + 5 x 32 x 3 = 5856.

The maximum number of ISDN subscribers supported in the standard configuration is 5376/4= 1344.

If the UMG8900 accesses only ADSL broadband subscribers, the maximum number ofsubscribers supported in the standard configuration is the same with that of ISDN subscribers.

If high-density UA frames are configured and rear-access N66-22 cabinets are adopted, therelated subscriber frames are the HABA frames. Figure 3-9 shows the configuration.

Figure 3-9 Configuration of components in the high-density rear-access cabinet

HABA 2 16U

Air filter 2U

SSM

Cable frame

HABA 1 16U

Filler panel 1UDC power

distribution box 2U

Environmentmonitoring box 2U

Filler panel 1U

5U

1U



Product Description


Issue 02 (2009-01-09)

(29 + 30) x 32 = 1888.


An SSM-4 frame can connect with up to six high-density rear-access cabinets. That is, an SSM-4frame supports up to 11328 subscribers.

If low-density UA frames are configured and front-access user access frames are adopted,H66-22 cabinets are used. The related subscriber frames are the UAFM and the UAFS. Figure3-10 shows the maximum configuration.

Figure 3-10 Maximum configuration in the front-access integrated access application

UAFM

UAFS(1)

UAFS(2)

SSM

1U

2U

5U

11U

11U

11U

1UPower distribution frame 2U

Environment monitoring box1U1U

Cabling rack

Cabling rack

Filler panel 1U1U

UAFS(3) 11U

UAFS(4) 11U

4U

6U

6U

6U

Cabling rack

Cabling rack

Filler panel

Filler panel

Filler panel

Filler panel

Filler panel

In the standard configuration, a UAFM frame supports nine subscriber boards. If only one powersupply is configured, a UAFM frame can support 10 subscriber boards. In the standardconfiguration, a UAFS frame supports 12 subscriber boards. If only one power supply isconfigured, a UAFS frame can support 13 subscriber boards.

A POTS narrowband subscriber board can support up to 32 POTS subscribers. A DSL subscriberboard can support up to eight ISDN subscribers. A broadband subscriber board can support upto eight ADSL subscribers.

Thus, the maximum numbers of subscribers supported in the standard configuration are asfollows:

POTS subscribers: (9 + 12 x 4) = 1824



3-11

ISDN users: 3072/4 = 456

ADSL users: (9 + 12 x 4) x 8 = 456

If only one power supply is configured for the subscriber frame, the maximum numbers ofsubscribers supported in the standard configuration are as follows:

POTS users: (10 + 13 x 4) x 32 = 1984

ISDN users: 1984/4 = 496

ADSL users: (10 + 13 x 4) x 8 = 496

If high-density UA frames are configured, front-access H66-22 cabinets are adopted. The relatedsubscriber frames are the HABD and the HABF. Figure 3-11 shows the configuration.

Figure 3-11 Configuration of components in the high-density front-access cabinet

HABD (1)

HABF

Filler panel

1U

2U

1U

10U

10U

2U

2U

Environment monitoring box 1U1U

HABD (2) 10U

Cabling rack

Air filter

SSM

Cable frame

DC power distribution frame

1U

5U

Filler panel

Filler panel


(11 + +12 + 18) x 32 = 1312.


An SSM-4 can connect with up to three high-density front-access cabinets. That is, an SSM-4frame supports up to 3936 subscribers.


Product Description


Issue 02 (2009-01-09)

3.2.2 Frame ArchitectureThis describes the frame architectures of the UMG8900.

The UMG8900 adopts SSM-4 frames to provide the service switching function. The SSM-4frame adopts the semi-integrated structure. The frame is integrated with two power modules anda fan box. That is, two power modules are located at the bottom of the frame, and a fan box islocated on the right. Refer to Figure 3-12.

Figure 3-12 Front view of an SSM-4 frame

1

2

33

1. Frame lintel 2. Fan box 3. Power supply modules

The SSM-4 frame is the standard 19-inch structure. A single frame is 5 U high. Five boards canbe inserted in the slots horizontally. Figure 3-13 shows the board deployment in an SSM-4frame.

Figure 3-13 Board deployment in an SSM-4 frame

MMIU 0

MOMD 1

MOMD 2

MVPD 3

MVPD 4

POWER1 POWER2

FAN

3.2.3 External InterfacesThis describes the external interfaces provided by the UMG8900, including trunk interfaces ,gateway control interfaces, and operation and maintenance interfaces.



3-13

The UMG8900 externally provides the subscriber interface, trunk interface, gateway controlinterface, and operation and maintenance interface. The user access module (UAM) providesthe subscriber interface and the access is implemented on different subscriber boards.

Table 3-1 lists the mapping between boards and the trunk interface, gateway control interface,and operation and maintenance interface.

Table 3-1 Mapping between interfaces and boards

LogicalInterface

Interface Board Description

Gateway control/signalingadaptation andtransfer

FE1 MVPD Used in the trisection mode. TheMVPD provides the externalphysical interface.

OMC MOMD Used in the dichotomy mode.

FE0 MVPD Used in the converge mode. TheMOMD provides the externalphysical interface.

TDM bearerprocessing

E1/T1, E3/T3 MOMD The UG01 MOMD provides the E1/T1 interface.The UG02MOMD provides the E3/T3 interface.

Packet bearerprocessing

FE0 MVPD The MOMD provides the externalphysical interface.

NOTE

UG01 and UG02 refer to different versions of the same board. They differ in hardware interfaces andcapacities, but provide the same functions. The UG01MOMD and UG02MOMD adopt the same motherboard. The UG01MOMD adopts the FEIB subboard and provides E1/T1 interfaces. The UG02MOMDadopts the FEIC subboard and provides E3/T3 interfaces.

Trisection indicates that IP-based H.248/SIGTRAN signaling, VoIP bearer data streams, andOMC messages adopt different physical interfaces for transmission. Dichotomy indicates thatH.248/SIGTRAN signaling and OMC messages adopt the same physical interface. Convergeindicates that these three service streams adopt the same physical interface.

3.3 Logical ArchitectureThis describes the logical architecture.

Figure 3-14 shows the logical architecture of the UMG8900.


Product Description


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Figure 3-14 Logical architecture of the SSM-4

TDMbearer

processingmodule Service

resourcesmodule

Packetbearer

processingmodule

Gatewaycontrolmodule

Signalingadaptation

module

TDM IP

H.248/SIGTRAN

Useraccessmodule

POTS/ISDN

H.248

The hardware of the UMG8900 can be divided into relatively independent service modules.Different service modules use independent boards. Table 3-2 lists the module division and therelationship between modules.

Table 3-2 Logical module division

Module Function Board

Gateway control l Interacts with the gateway controller

l Manages and controls bearer resources andservice resources of the gateway

l Reports the user signaling and callinformation to the gateway controller

l Terminates the CAS such as the R2signaling

l Sends the signaling to the gatewaycontroller through H.248 messages

MVPD

TDM bearerprocessing

l Provides TDM service interfaces

l Performs TDM service framing

l Switches TDM services

MOMD

Packet bearerprocessing

l Provides packet bearer service interfaces

l Adapts and reorganizes packet services

l Switches packet services

MVPD



3-15

Module Function Board

Service resources Provides service resources that the systemrequires, including:l Voice codec conversion

l Announcement playing

l Digit collecting

l Echo cancellation

MVPD

Signaling adaptation l Adapts and resolves narrowband signalingto broadband packet signaling

l Cooperates with the TDM bearerprocessing module and the packet bearerprocessing module to forward signaling

MOMD

User access Provides various user interfaces to perform theuser access function

ASL, DSL, ATI,CDI, and ADSL

The UMG8900 also includes the following modules:

l Operation and maintenance module for device maintenance and managementl Clock module that provides clock signals for TDM bearer processing

3.4 Software ArchitectureThis describes the software architecture of the UMG8900, including the software fundamentals,host software, and client software.

3.4.1 Software FundamentalsThis describes the software fundamentals of the UMG8900.3.4.2 Host SoftwareThis describes the architecture and functions of the host software of the UMG8900.3.4.3 Client SoftwareThis describes the architecture and functions of the client software of the UMG8900.

3.4.1 Software FundamentalsThis describes the software fundamentals of the UMG8900.

As a large-capacity universal media gateway, the UMG8900 supports the complete mediagateway processing functions and the embedded signaling gateway (SG) functions. Figure3-15 shows the software architecture of the UMG8900.

Figure 3-15 Software architecture of the UMG8900

BAM LMT

Hostsoftware


Product Description


Issue 02 (2009-01-09)

The software of the UMG8900 consists of the host software and the LMT software. The hostsoftware achieves bearer related service processing, underlying support, and hardwaremanagement. The LMT software and the back administration module (BAM) of the hostsoftware are in the client/server mode. The LMT software completes routine maintenance andmanagement on the host of the UMG8900.

3.4.2 Host SoftwareThis describes the architecture and functions of the host software of the UMG8900.

Figure 3-16 shows the architecture of the host software of the UMG8900.

Figure 3-16 Host software architecture

Hardware platform

Signalingprocessing

module

Lower-layer base software（RTOS）

Gateway control module

Middleware （VRP/Dorpra）

TDM bearerresource

processingmodule

Media bearer resourceprocessing module

Operation & maintenance module

Packet bearerresource

processingmodule

The host software of the UMG8900 consists of the lower-layer base software module,middleware software module, TDM bearer resource processing module, packet bearer resourceprocessing module, signaling processing module, gateway control module, and operation andmaintenance module. The following describes the software modules.

Lower-Layer Base Software ModuleThis module adopts the popular real-time operating system (RTOS), providing functions suchas task management, message management, memory management, time limit management, andsystem initial boot.

Middleware Software ModuleThe UMG8900 employs Vxworks, a popular operating system in the industry. Based on thedistributed object-oriented programmable architecture (DOPRA) and the versatile routingplatform (VRP) protocol stack independently developed by Huawei, the UMG8900 also supportslower-layer operating system of a board, including system process, interruption, memorymanagement, and allocation. Thus, the UMG8900 can provide more reliable resourcemanagement and allocation and ensure the stable running of the system.

TDM Bearer Resource Processing ModuleThis module works with the TDM processing module to forward and process service streamsbased on TDM.



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Its basic function is to receive commands sent by the gateway control module and to connectand release specified timeslots.

Packet Bearer Processing ModuleThis module processes packet bearers of service streams. By encapsulating service streams ofdifferent formats into packets, this module achieves transport adaptation over the IP network.This module performs the invocation and topology connection of packet resources under thecontrol of the gateway control module to realize the interworking and service switching betweenpacket networks.

Signaling Processing ModuleThis module achieves signaling adaptation, including resolution of protocol stacks in differentbearer modes.

This module also resolves protocols when signaling is transmitted based on IP/TDM.

Media Resource Processing ModuleThis module provides operation functions on service resources of the UMG8900. TheUMG8900 supports G.711/G.723/G.726/G.729 voice codec processing, announcement playing,digit collecting, conference bridge (audio mixing), dual tone multi-frequency (DTMF) detection,fax, frequency shift keying (FSK), and multiple frequency control (MFC), as well as H.263/MPEG-4 video codec. The media resource processing module works in resource pool mode andcan be configured based on actual networking.

Gateway Control ModuleThis module processes and exchanges the Media Gateway Control Protocol (MGCP), managesand invokes resources within the UMG8900, sets up and disconnects TDM bearer channels bycontrolling TDM bearer resources, and performs functions such as voice codec conversion, echocancellation (EC), announcement playing, and digit collecting by controlling the serviceresource module. The gateway control module is the control center of the whole UMG8900.

Operation and Maintenance ModuleThis module offers functions as such data configuration, service maintenance and management,board registration, software loading, and system monitoring. In addition to maintenance andmanagement on the UMG8900 host, this module also provides the interface for messageexchange with the LMT and the integrated network management system (NMS). Thus,management and maintenance on the UMG8900 can be implemented through the LMT and theintegrated NMS.

3.4.3 Client SoftwareThis describes the architecture and functions of the client software of the UMG8900.

The client software refers to the local maintenance terminal (LMT) and the iManager integratednetwork management system (NMS). The iManager integrated NMS integrates functions of theLMT, in addition to topology management.

The client software and the host back administration module (BAM) are in client/server mode.The client software achieves management, maintenance, and data configuration of theUMG8900 through the BAM.


Product Description


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The LMT is a single point management system, and the iManager integrated NMS completescentralized management and maintenance on all the devices in the network.

Figure 3-17 shows the connections between the LMT, iManager integrated NMS, and theUMG8900.

Figure 3-17 Connections between the LMT, host, and peripherals

BAM

FAMUMG89001

OMU

BAM

FAMUMG8900n

OMU

......

LMT Alarmbox

FE internalinterface

LAN

MML and privateprotocol

MMLTCP/IPMML

SNMP SNMP

MMLSNMP Privateprotocol

MML and privateprotocol

Server

Client

iManager Server

Client

iManager

External invoking

Phone

FE internalinterface

Serialport

Serialport

External invoking

The BAM is on the OMU as an embedded hard disk. The LMT and the BAM are in standardclient/server mode. The LMT serves as the client and manages the UMG8900 by communicatingwith the BAM through TCP/IP-based MML protocols and binary protocols.

The LMT can be installed on any PC or PC workstation that can communicate with the OMCinterface on the OMU of the UMG8900. The LMT can connect with the alarm box through theserial port of the PC to enable visual and audio alarms.



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4 Services and Networking Applications

About This Chapter

This describes the sample networking applications supported by the UMG8900.

4.1 AG Networking ApplicationsThis describes the typical access gateway (AG) networking applications.

4.2 TG Networking ApplicationsThis describes the typical trunk gateway (TG) networking applications.

HUAWEI UMG8900 Universal Media GatewayProduct Description 4 Services and Networking Applications


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4.1 AG Networking ApplicationsThis describes the typical access gateway (AG) networking applications.

Common User AccessThe UMG8900 can access common subscribers through the user access module (UAM) or theV5 access network. Figure 4-1 shows the networking application.

Figure 4-1 Networking application of common user access

IP Core Network

SS7/PRI/R2

V5 AN

PSTN/PLMN

POTS POTS POTS POTS

PBX RSP/UA

UMG8900(TG)

UMG8900(AG)

MGC

V5RSA

PRI/R2

When the UMG8900 serves as an AG, it can access various broadband and narrowbandsubscribers through the UAM. The service switching module (SSM) is placed at a localexchange. The UAM can be placed away from the SSM through an optical access network ornear the SSM.

In this networking mode, the UMG8900 provides IP interfaces at the local exchange. TheUMG8900 can manage subscribers in a centralized way at the local exchange. In addition, theUMG8900 can separate voice and data service streams in upstream transmission. At present,since the IP network is not sound, this networking mode is ideal for local exchange upgrade andsetup.

Multiple UMG8900s can be managed by one media gateway controller (MGC) to build a largelocal network, providing the IP Centrex function for enterprise subscribers in other places.

The UMG8900 interworks with the MGC through the standard H.248 protocol. In thecommunication between the broadband terminals in the next generation network (NGN) and theterminals subordinate to the UMG8900, the UMG8900 implements service stream formatsprocessing and bearer conversion.

PBX AccessA private branch exchange (PBX) is an enterprise exchange. The UMG8900 provides the PBXinterface to access a PBX. Figure 4-2 shows the networking application.

4 Services and Networking ApplicationsHUAWEI UMG8900 Universal Media Gateway

Product Description


Issue 02 (2009-01-09)

Figure 4-2 Networking application of PBX access

IP Core Network

UMG8900

UMG8900

UMG8900

PBX1 PBX2 PBX3

MGC

R2 PRA SS7

The UMG8900 supports three modes for accessing a PBX. One mode is through the R2 channelassociated signaling (CAS). In this mode, the UMG8900 terminates the R2 signaling and mapsthe subscriber signaling to the packets specified by H.248 messages. Then, the UMG8900 sendsthe packetized signaling to the MGC for processing. The second mode is through the primaryrate adaptation (PRA) signaling. In this mode, the UMG8900 adapts the integrated servicesdigital network (ISDN) signaling to packets based on ISDN Q.921-User Adaptation Layer (IUA)of the Signaling Transport (SIGTRAN) protocol. Then, the UMG8900 sends the packets to theMGC for processing. The third mode is through the standard SS7 signaling. In this mode, theprocessing is the same as that for the UMG8900 to access a switch in the public switchedtelephone network (PSTN).

When accessing a PBX, the UMG8900 only completes switching and packet adaptation on theservice plane. The signaling messages on the control plane are processed by the MGC, and theUMG8900 only completes packet adaptation and mapping of signaling.

The following cases exist in applications over the enterprise network:

l Telecommunication carriers fully acquire enterprise networks.In this case, enterprises do not pay for any fixed communication devices.Telecommunication carriers set up the network for enterprises. They fully use the advancedstructure and abundant services of the NGN to provide communication services, such astraditional voice telephones, broadband access, wide area Centrex, and multimediaconferences.It is an effective way to end the disorder of existing enterprise networks, as well as the idealdevelopment goal for the next generation enterprise network.



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l Telecommunication carriers partly Acquire enterprise networks.Enterprises buy and maintain PBXs, and telecommunication carriers access PBXs to thetelecommunication network. Enterprise PBXs, similar to trunk subscribers connected tothe UMG8900, are connected with the UMG8900 through the R2/PRA/E&M signaling.In addition, certain old PBXs can support only upstream common subscriber cables. In thiscase, PBXs act as common narrowband subscribers connected to the UMG8900, and theUMG8900 can support their access.In this case, calls between subscribers connected to enterprise PBXs are directly processedin PBXs. External traffic of PBXs is managed and charged by telecommunication carriers.

WLL Access

Wireless local loop (WLL) access is a solution to implement integrated access of mobilesubscribers in fixed networks. The UMG8900 supports the WLL access. Figure 4-3 shows thenetworking application.

Figure 4-3 Networking application of WLL access

PSTN/PLMNIP Core Network

WLL WLL

V5

UMG8900(TG)

SS7

UMG8900(TG)

MGC

To solve the communication problem in vast geographically remote areas, many countries adoptthe low-cost and wide-coverage CDMA 450 technology to build user access networks. Inaddition, certain fixed network carriers are not granted with the mobile license. They use codedivision multiple access (CDMA) technologies to set up a large number of WLLs.

To rapidly absorb the mobile subscribers to the NGN, the UMG8900 can connect with the basestation controller (BSC) through the extended V5 (V5+) protocol to access WLL subscribers.

Compared with ALL CDMA, the advantages of NGN+WLL are as follows. NGN+WLL adoptsthe NGN core network, and the capital expenditure is low. The existing NGN core network canbe used, and this is suitable for fixed network carriers to expand mobile services. Thedisadvantage is that NGN+WLL cannot support roaming.


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When serving as an AG, the UMG8900 supports the StandAlone function.

StandAlone refers to the function that plain old telephone service (POTS) subscribers accessedby the UMG8900 can complete basic voice service calls when the UMG8900 acts as an AG andthe H.248 link between the UMG8900 and the softswitch is disconnected because the networkor the softswitch is faulty.

Subscribers include POTS subscribers accessed through the UAM and through the V5 accessnetwork.

In StandAlone mode, the UMG8900 can record bills. Bills are stored in the bill pool in a simpleformat. When the bill pool is about to be full, it reports an alarm to the network manager. Whenthe bill pool is full, bills are covered cyclically, and the UMG8900 counts the number of lostbills due to the cyclic coverage. If the connection between the UMG8900 and the iGWB isnormal, the UMG8900 actively reports bills in the bill pool to the iGWB.

The UMG8900 deletes bills after confirming that the iGWB receives bills. If the TCP/IPconnection cannot be set up or breaks down after setup, bills are automatically cached in theUMG8900.

The memory of the bill pool is allocated dynamically. If the bill pool is configured not to exportbills, the memory of the bill pool is released.

4.2 TG Networking ApplicationsThis describes the typical trunk gateway (TG) networking applications.

Only the service switching module (SSM) is required when the UMG8900 serves as a TG.

As a network element in the next generation network (NGN), the UMG8900 implements theconversion of service stream formats and the adaptation and interworking of bearer modes. Itthus enables NGN subscribers to interwork with existing public switched telephone network(PSTN) and integrated services digital network (ISDN) subscribers.

The UMG8900 serving as a TG supports the following functions:

l Working with the softswitch such as the media gateway controller (MGC) of Huawei toserve as a tandem exchange or a toll exchange in the traditional PSTN and be compatiblewith existing basic services, supplementary services, and intelligent services

l Supporting basic voice services and G.711, G.723, G.726, and G.729 voice codecs, settingmultiple packetization duration, converting different codecs, and meeting requirements fortransmission from TDM to IP

l Supporting the G3 fax service in the traditional PSTN, T.38-based IP real-time fax service,and high-speed fax service

l Supporting transparent transmission of the modem service based on modem over G.711

l Supporting the embedded signaling gateway (SG) function, adaptation of the SignalingSystem No.7 (SS7), Digital Subscriber signalling No.1 (DSS1), and V5 signaling based onMTP2 User Adaptation Layer (M2UA)/ISDN User Adaptation Layer (IUA)/V5 UserAdaptation Layer (V5UA), and access of a V5 access network or a wireless local loop(WLL) through the V5 protocol

l Supporting the channel associated signaling (CAS) such as R2 signaling, China No.1 (CNo.1) signaling, and International No.5 signaling (No.5), interworking with a CAS switch,terminating the CAS, and supporting the multinational adaptation of the R2 signaling



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To meet the service connection requirement, the UMG8900 also supports dual tone multi-frequency (DTMF) digit collecting, pulse digit collecting, and multinational announcementplaying.

Gateway ExchangeThe UMG8900 can serve as a gateway exchange in the NGN to pass traditional PSTN servicesto the NGN. Figure 4-4 shows the networking application when the UMG8900 serves as agateway exchange.

Figure 4-4 Networking application of the NGN gateway exchange

PLMN

PSTN

V5 AN

E-PhoneAG

SIP

IAD

H.248

H.248H.248/MGCP

SIP/H.323

SIP/H.323

UMG8900(TG)

SS7/R2/No.5

LE

TUP/ISUP

V5/V5+GMSC

LE: local exchange TUP: Telephone User Part ISUP: Integrated Services DigitalNetwork User Part

V5AN: V5 access network GMSC: gateway mobile switchingcenter

PLMN: public land mobile network

IAD: integrated access device AG: access gateway MGCP: Media Gateway ControlProtocol

SIP: Session Initiation Protocol

The UMG8900 serving as a gateway exchange is controlled and managed by the media gatewaycontroller (MGC). It interworks with the MGC through the H.248 protocol.

PSTN, public land mobile network (PLMN), V5 access network, and private branch exchange(PBX) subscribers can access the NGN through the UMG8900 so that NGN subscribers cancommunicate with narrowband network subscribers.

The UMG8900 supports the embedded SG function. It can transparently transmit signaling fromthe external network to the softswitch to implement interworking on the call control plane.

For the service plane, when the service streams of two networks fail in interworking, theUMG8900 implements the service stream format conversion.

Tandem/Toll ExchangeThe UMG8900 works with the MGC to serve as a tandem exchange in the traditional PSTN.Figure 4-5 shows the networking application.


Product Description


Issue 02 (2009-01-09)

Figure 4-5 Networking application of the tandem exchange

Packet/TDMbearer network

AppServer Route/PolicyService NMS

PSTN PSTN

IN

UMG8900 UMG8900

Switch Switch

H.248/SIGTRAN

SS7/PRI/R2

SIP-TMGC MGC

H.248/SIGTRAN

SS7/PRI/R2

INAP

PARLAY/SIP

LDAP/TRIP SNMP

ISUP: ISDN User Part SS7: Signaling System No.7 PRI: primary rate interface

SIGTRAN: Signaling Transport SIP: Session Initiation Protocol

When the UMG8900 serves as a tandem exchange, it can complete the call services betweendifferent local exchanges in voice over IP (VoIP) mode and implement the IP-based tandemlayer. Therefore, the IP transmission technology is gradually introduced during PSTNreconstruction and upgrade to meet the evolution to all-IP networks.

Multiple UMG8900s serving as tandem exchanges are connected with each other through IPconnections to form the IP-based core network. This enables the gradual evolution towards theNGN. The UMG8900s can also be connected through the existing TDM transport network,saving the carriers' investment.

The call control signaling from the local exchange can be transferred by the signaling transferpoint (STP) or be transferred to the MGC by the embedded SG of the UMG8900.

NOTE

The UMG89009800 can also serve as a toll tandem exchange for networking. In this situation, it works asa tandem exchange, and no more explanation is given here.

PBX Access

A PBX is an enterprise exchange. The UMG8900 provides the PBX interface to access a PBX.Figure 4-6 shows the networking application of PBX access.



4-7

Figure 4-6 Networking application of PBX access

IP Core Network

R2 PRA

PBX1 PBX2 PBX3

UMG8900 UMG8900 UMG8900

SS7

MGC

The UMG8900 supports three modes for accessing a PBX: One mode is through the R2 channelassociated signaling (CAS). In this mode, the UMG8900 terminates the R2 signaling and mapsthe subscriber signaling to the packets specified by H.248 messages. Then, the UMG8900 sendsthe packetized signaling to the MGC for processing. The second mode is through the primaryrate adaptation (PRA) signaling. In this mode, the UMG8900 adapts the ISDN signaling topackets based on ISDN Q.921-User Adaptation Layer (IUA) of the SIGTRAN protocol. Then,the UMG8900 sends the packets to the MGC for processing. The third mode is through thestandard SS7 signaling. In this mode, the processing is the same as that for the UMG8900 toaccess a switch in the PSTN.

When accessing a PBX, the UMG8900 only completes switching and packet adaptation on theservice plane. The signaling messages on the control plane are processed by the MGC, and theUMG8900 completes only packet adaptation and mapping of signaling.


Product Description


Issue 02 (2009-01-09)

5 OAM System

About This Chapter

This describes the operation, administration, and maintenance (OAM) system of theUMG8900. Operation and maintenance functions are basic requirements for subscribers tomanage and maintain the UMG8900. An easy and flexible OAM manner can reduce theoperational expenditure (OPEX) of the UMG8900.

5.1 System ArchitectureThis describes the architecture and components of the operation, administration, andmaintenance (OAM) system of the UMG8900.

5.2 OAM FunctionThis describes the operation, administration, and maintenance (OAM) functions of theUMG8900.

HUAWEI UMG8900 Universal Media GatewayProduct Description 5 OAM System


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5.1 System ArchitectureThis describes the architecture and components of the operation, administration, andmaintenance (OAM) system of the UMG8900.

OAM refers to all the work a carrier does on a telecommunication device or system that is putinto operation. The purpose of OAM is to ensure that the system runs normally and providesexcellent telecommunication services.

The UMG8900 provides powerful OAM functions to facilitate routine management andmaintenance and improve the usability and maintainability.

Figure 5-1 shows the OAM system of the UMG8900.

Figure 5-1 OAM system of the UMG8900

UMG8900

Internet

PSTN

Local Maintenance

Remote Maintenance

LAN

Modem

N2000 ServerN2000 Client

Router

LMT

LMT

UMG8900: universal media gateway LMT: local maintenance terminal

LAN: local area network PSTN: public switched telephone network

The OAM system is in client/server mode. The UMG8900 host acts as the server, and the localmaintenance terminal (LMT) acts as the client. The LMT provides the management andmaintenance functions.

The UMG8900 achieves remote and local maintenance through the LMT and provides interfaceswith Huawei integrated network management system (NMS) N2000. The N2000 managesdevices in the network in a centralized way. The N2000 consists of one N2000 server andmultiple N2000 clients.

The server of the OAM system is located in the main control frame of the UMG8900. Therefore,the main control frame must be configured either in the multi-frame cascading or in the single-frame application. The UMG8900 implements the operation, administration, and maintenanceof the whole device and provides interfaces with the external maintenance client through themain control frame.

5 OAM SystemHUAWEI UMG8900 Universal Media Gateway

Product Description


Issue 02 (2009-01-09)

In the single-frame networking, the main control frame, service frame, and central switchingframe are integrated into one frame. In the multi-frame cascading, the main control frame is anindependent frame. It must be configured at first and be always numbered 1. For the convenienceof operation and maintenance, the information about the main control frame and the defaultboards is already added by default.

The master and slave OMC interfaces connect with a local area network (LAN) Switch throughstraight-through network cables. The OMC interfaces connect with the LMT through the LANSwitch and connect with a wide area network (WAN) and the Internet through a router.

The main control board works in master/slave mode. When the master main control board isswitched to the slave state, the UMG8900 automatically sends and receives operation andmaintenance messages through the original slave OMC interface. Thus, the connection with theLMT is not torn down.

The LMT can connect with the UMG8900 host directly or through a LAN Switch. The twoconnection modes differ in network cables. The direct connection uses crossover network cableswhile the connection through the LAN Switch uses straight-through network cables.

The maintenance and management of the UMG8900 can also be conducted through remote dial-up access. In this case, a remote access server must be configured on the UMG8900 side or aremote terminal connects the UMG8900 host through the Internet.

5.1.1 LMT Management SystemThis describes the features and functions of the local maintenance terminal (LMT) managementsystem.

5.1.2 Integrated NMSThis describes the features and functions of the integrated network management system (NMS).

5.1.3 MML Command LineThis describes the features and functions of the man-machine language (MML) command line.

5.1.1 LMT Management SystemThis describes the features and functions of the local maintenance terminal (LMT) managementsystem.

The UMG8900 provides the graphic user interface (GUI) based and man-machine language(MML) based LMT for device maintenance and management. The LMT supports deviceconfiguration and management, service maintenance, performance measurement, servicetracing, security management, and fault management.

The LMT, an operation and maintenance client, connects to the back administration module(BAM) of the operation and management unit (OMU) in standard client/server mode.

The BAM supports device management and provides external management interfaces. The BAMemploys the industry-popular real-time and distributed operating system. This improves theservice processing capability and the response speed of the UMG8900. The BAM connects andmanages other functional units through the front administration module (FAM).

The LMT provides friendly graphic interfaces and abundant online help information. At theLMT, you can check command meanings and parameter descriptions when using commands.In addition, you can view alarm information, including alarm meanings and handlingrecommendations.

The LMT manages multiple UMG8900s at the same time, provides external alarm boxes forreporting audio and visual alarms, and sends alarm information to maintenance personnel



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through the short message center (SMC) so that they can clear alarms in time and ensure normalrunning of the UMG8900.

5.1.2 Integrated NMSThis describes the features and functions of the integrated network management system (NMS).

The N2000 is an integrated NMS in Huawei iManager network management solutions. It is theplatform software for centralized management of difference devices in the fixed network. TheN2000 is an integrated NMS in Huawei iManager network management solutions. It is theplatform software for centralized management of difference devices in the fixed network. TheN2000 communicates with the UMG8900 host through the Transfer Control Protocol (TCP)/Internet Protocol (IP).

The N2000 makes it easy to maintain alarm information, operate and manage the UMG8900,and manage and query the UMG8900 for centralized management.

The N2000 consists of N2000 server and N2000 client. Multiple N2000 clients can be adopted.The LMT is loosely coupled with the N2000. The N2000 achieves common management of theUMG8900, such as topology management and fault management on all the UMG8900s in thenetwork. The LMT provides the special management function of the UMG8900.

5.1.3 MML Command LineThis describes the features and functions of the man-machine language (MML) command line.

The UMG8900 provides graphical interface-based O&M functions as well as MML commands.The MML commands can be used to implement data configuration, and routine operation,maintenance, and management.

The MML interface is a man-machine interactive interface specified based on ITU Z.301-Z.341recommendations. MML provides commands to operate and query the UMG8900. With thesecommands, you can monitor and manage the UMG8900 in all aspects.

MML features the following:

l Encapsulation: Services of the UMG8900 are encapsulated with MML commands. Eachcommand corresponds to a function to enhance the efficiency of a simple operation. Forexample, adding an IP address for an IP interface, several steps can be integrated throughMML commands to improve efficiency.

l Consistency check: Data consistency check is performed by the MML system. Therelationship between tables is checked when the function is performed to filter unwanteddata.

l Conversion: MML commands are similar to the lower layer application program interface(API), and all the other applications are built on it. The graphic user interface (GUI) terminaltranslates operations of the subscriber interface into commands. It then transmits them tothe MML system to perform the function and return text results. The results in graphicalinterface are converted into proper printout. This ensures system stability, and the normalrunning of the UMG8900 is not affected due to errors in the program.

l Interaction: Input and output of the MML system based on the pure character string supportthe interaction between Telnet and the UMG8900. Therefore, the client can cross overseveral platforms, for example, support dump terminal without processing capability. Thisis the benefit of integrated network management, which indicates the development trendin communication products.


Product Description


Issue 02 (2009-01-09)

In MML graphical interface, you can select historical commands and search keywords. Then,you can select needed commands more easily.

The MML graphical interface provides prompts for ranges of specific command parameters.You can also type a parameter through the drop-down combo box, the drop-down list box, andthe check box.

5.2 OAM FunctionThis describes the operation, administration, and maintenance (OAM) functions of theUMG8900.

The UMG8900 provides an graphical operation and maintenance environment. The main OAMfunctions are as follows:

Device Management

In a graphical interface, you can view information about device configuration, cascading, andcurrent status of boards and the power distribution system. Through the shortcut menu, you canquery, display, switch over, reset, isolate, block, or activate boards and interfaces.

Through the graphical interface and the man-machine language (MML) commands, you canmanage and maintain the hardware, system resources, signaling links, clocks, and physical ports.

Data Management

Data management helps to manage and maintain configuration data and operation data of theUMG8900.

The configuration data includes service configuration and local office configuration data. TheUMG8900 can save, dump, and restore the configuration data to facilitate system upgrade andmaintenance.

Alarms, logs, performance data, and tracing data are generated during system running. TheUMG8900 provides the direct data saving function as well as the dumping function to implementreal-time data backup. This helps fault location and network optimization.

Alarm Management

Alarm management refers to receiving and dealing with alarms. According to alarm type andlevel, a specific alarm terminal such as alarm box and alarm management system starts up,delivers related aural and optical signals, and sends the translated alarm information to thenetwork management center (NMC) through network management interfaces. In addition, alarmmanagement also supports alarm information saving, historical alarm record querying, and alarmhandling mode setting.

The alarm severity level can be classified into critical, major, minor, and warning.

l Critical: It refers to an alarm that is global and may disable the UMG8900 running. It mustbe cleared at once; otherwise, the whole UMG8900 may break down.

l Major: It refers to a board or cable alarm within a small scope. It affects the service qualityand must be cleared in time; otherwise, services cannot be normally provided.



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l Minor: It refers to a common alarm that describes whether the UMG8900 or the line worksproperly. It reminds the maintenance personnel of determining the cause to the alarm andclearing potential faults.

l Warning: It refers to an alarm that may affect services provided by the UMG8900 due topotential errors. You can clear such alarms based on actual prompts.

Tracing ManagementTracing management supports service tracing, signaling tracing, interface tracing, and messagetranslation. It also performs real-time dynamic tracing on service resources and interfaceprotocols in connection, status migration, resource utilization, and control information stream.The tracing information can be stored to analyze and locate faults.

Performance ManagementPerformance management measures services and call objects of all the call types. These statisticsare the reference for UMG8900 running status analysis and telecommunications networkplanning, design, operation, management, and maintenance.

The UMG8900 provides effective performance management measures. Performancemanagement is implemented through defining of different measure objects, measure sets,measure units, and measure items and flexible setting of measure time.

Environment and Power Supply MonitoringEnvironment and power supply monitoring achieves remote monitoring and control onenvironment, power supply, and other intelligent devices of the UMG8900 in the central orremote equipment room. Thus, remote monitoring and centralized management in equipmentroom where no one is on duty can be implemented.


Product Description


Issue 02 (2009-01-09)

6 Technical Specifications

About This Chapter

This describes the common technical specifications of the UMG8900 for your retrieval andusage. The technical specifications include performance specifications, supported protocols,physical specifications, and environmental specifications.

6.1 Performance SpecificationsThis describes the performance specifications of the UMG8900, including the service processingcapability, signaling transfer capability, platform switching capability, and clock specifications.

6.2 Supported ProtocolsThis describes the protocols supported by the UMG8900.

6.3 Physical SpecificationsThis describes the physical specifications of the UMG8900.

6.4 Environmental SpecificationsThis describes the environmental specifications of the cabinets.

HUAWEI UMG8900 Universal Media GatewayProduct Description 6 Technical Specifications


6-1

6.1 Performance SpecificationsThis describes the performance specifications of the UMG8900, including the service processingcapability, signaling transfer capability, platform switching capability, and clock specifications.

6.1.1 Service Processing CapabilityThis describes the service processing capability of the UMG8900, including the number ofsubscribers and the traffic.

6.1.2 Platform Switching CapabilityThis describes the specifications of TDM and packet switching capabilities and the platformswitching capability of the UMG8900.

6.1.3 Clock SpecificationThis describes the clock specifications of the UMG8900.

6.1.4 Voice Quality Assurance SpecificationThis describes the voice quality assurance specifications of the UMG8900.

6.1.5 Reliability SpecificationThis describes the reliability specifications of the UMG8900, including mean time betweenfailure (MTBF) and mean time to repair (MTTR).

6.1.1 Service Processing CapabilityThis describes the service processing capability of the UMG8900, including the number ofsubscribers and the traffic.

TGTable 6-1 lists the service processing capability when the UMG8900 serves as a trunk gateway(TG).

Table 6-1 Service processing capability of a TG

Item Specification

Number of ports Up to 1440 channels

CAPS 24 per second

AGTable 6-2 lists the service processing capability when the UMG8900 serves as an access gateway(AG).

6 Technical SpecificationsHUAWEI UMG8900 Universal Media Gateway

Product Description


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Table 6-2 Service processing capability of an AG

Item Specification

Number ofsubscribers

POTS Up to 6,000 subscribers

BRI Up to 3,000 subscribers

PRI Up to 1,440 B channels

V5 Up to 6,000 subscribers

Bill Up to 500,000 bills in simple format

CAPS ≤ 24 per second

Signaling Transfer Capability

The UMG8900 supports signaling adaptation and transfer from TDM to IP based on the standardSignaling Transport (SIGTRAN) protocol. Table 6-3 lists the related technical specifications.

Table 6-3 Service processing capability (signaling transfer)

Item Specification

Number of MTP2links

64 kbit/s 8 links per board, double processing capability intwo-board configuration

Number of MTP3links

64 kbit/s 8 links per board, double processing capability intwo-board configuration

Number of Q.921links

64 kbit/s 48 links per board, double processing capabilityin two-board configuration

Number of LAPV5links

64 kbit/s 16 links per board, 16 links at most

6.1.2 Platform Switching CapabilityThis describes the specifications of TDM and packet switching capabilities and the platformswitching capability of the UMG8900.

Table 6-4 lists the platform switching capability of the UMG8900.

Table 6-4 Platform switching capability

Item Specification

Packet switching 800 Mbit/s

TDM switching 4 K



6-3

6.1.3 Clock SpecificationThis describes the clock specifications of the UMG8900.

The UMG8900 supports the stratum-3 clock. Table 6-5 lists the technical specifications of clocksignals.

Table 6-5 Clock specifications

Item Specification

Network-accessed clock

Minimum accuracy ±4.6×10-6

Pull-in range ±4.6 x 10-6

Maximum frequency offset 2 x 10-8 per day

Initial maximum frequency offset < 1 x 10-8 per day

Long-term phasestate

Ideal state MTIE ≤ 1 ms

Holdover state MTIE (ns) ≤ a x s + (1/2) x b x s2+ c"s" standards for time measured inseconds, and "MTIE" is measuredin nanoseconds.

a = 10 b = 2.3 x 10-4 c = 1000

Clock work state The clock work state can bequickly locked, trace, holdover,and freely running.

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6.1.4 Voice Quality Assurance SpecificationThis describes the voice quality assurance specifications of the UMG8900.

Table 6-6 lists the voice quality assurance specifications provided by the UMG8900 .


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Table 6-6 Voice quality assurance specifications (ATG application)

Item Specification

Networkcodec delay

Not including transmission and IP network forwarding delayG.711 10 ms: TDM to IP delay < 15 ms; IP to TDM delay < 7 ms + IP networkjitterG.711 20 ms: TDM to IP delay < 25 ms; IP to TDM delay < 7 ms + IP networkjitterG.729 10 ms: TDM to IP delay < 20 ms; IP to TDM delay < 7 ms + IP networkjitterG.729 20 ms: TDM to IP delay < 30 ms; IP to TDM delay < 7 ms + IP networkjitterG.723 30 ms: TDM to IP delay < 42.5 ms; IP to TDM delay < 7 ms + IP networkjitter

VoicequalityPSEQ-LQ/MOS

- Normal networkcondition

Poor networkcondition(packet loss rate= 1%, networkjitter = 20 ms,delay = 100 ms)

Worse networkcondition (packet lossrate = 5%, networkjitter = 60 ms, delay =400 ms)

G.711 20 ms 4.15 (reachingthe PSTNquality)

3.80 (close to thePSTN quality)

3.40 (acceptable)

G.729 20 ms 3.72 (close to thePSTN quality)

3.50(acceptable)

3.00 (notrecommended)

G.723 30 ms 3.69 (close to thePSTN quality)

3.45(acceptable)

3.00 (notrecommended)

Jitter buffer 0 ms to 200 ms

Echocancellation

32 ms, 64 ms, and 128 ms

Fax speed The highest receiving and sending rate: 33.6 kbit/s

6.1.5 Reliability SpecificationThis describes the reliability specifications of the UMG8900, including mean time betweenfailure (MTBF) and mean time to repair (MTTR).

Table 6-7 shows the reliability specifications of the UMG8900.



6-5

Table 6-7 Reliability specifications

Item Specification

Resource availability in typical configuration ≥ 99.999%

MTBF ≥ 100,000 hours

MTTR ≤ 0.8 hours (excluding preparation time)

Down time < 5 minutes per year

System restart time < 10 minutes

6.2 Supported ProtocolsThis describes the protocols supported by the UMG8900.

Table 6-8 lists the protocols supported by the UMG8900.

Table 6-8 Supported protocols

Item Protocol

Media gateway control protocol H.248

Voice codec protocol G.711, G.723.1, G.726, G.729

Control protocol SCTP/TCP/UDP, RTCP

Signaling protocol V5, R2/CNo.1, No.5, R1.5, SIGTRAN(M2UA/M3UA/IUA/V5UA)

Stream protocol RTP/UDP/IP

Maintenance and management SNMP, IP Sec, DNS, SNTP

6.3 Physical SpecificationsThis describes the physical specifications of the UMG8900.

6.3.1 Power Supply and ConsumptionThis describes the power supply and consumption specifications of the UMG8900, includingthe rated input voltage, maximum input current, and power consumption.

6.3.2 Mechanical SpecificationsThis describes the mechanical specifications of the UMG8900, including the cabinet dimension,frame dimension, cabinet weight, frame weight, and bearing capability.

6.3.3 Safety SpecificationsThis describes the safety specifications that the UMG8900 complies with.

6.3.4 EMC Specification


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This describes the electromagnetic compatibility (EMC) specifications of the UMG8900.

6.3.1 Power Supply and ConsumptionThis describes the power supply and consumption specifications of the UMG8900, includingthe rated input voltage, maximum input current, and power consumption.

Table 6-9 lists the power supply and consumption specifications of the UMG8900.

Table 6-9 Power supply and consumption specifications of the SSM

Item Specification

Rated input voltage DC: –48 V/–60 VAC: 110 V/220 V

Input voltage range DC: –48 V (–40 V to –57 V) and –60 V (–51 V to –69 V)AC: 90 V to 264 V

Input mode Two power inputs or one power input

Maximum input current Two –48 V/–60 V power inputs in hot backup mode: 6.1 Aper inputTwo 110 V/220 V power inputs in hot backup backup: 3.1 Aper input

Power consumption TG: up to 165 W in DC mode and up to 190 W in AC modeAG: less than 4220 W in full configuration

6.3.2 Mechanical SpecificationsThis describes the mechanical specifications of the UMG8900, including the cabinet dimension,frame dimension, cabinet weight, frame weight, and bearing capability.

Table 6-10 lists the mechanical specifications of the UMG8900.

Table 6-10 Mechanical specifications

Item Specification

Cabinet dimension (height x width xdepth)

N68-22: 2200 mm x 600 mm x 800 mm [87 in. x24 in. x 31 in.]N68E-22: 2200 mm x 600 mm x 800 mm [87 in.x 24 in. x 31 in.]N66-22: 2200 mm x 600 mm x 600 mm [87 in. x24 in. x 24 in.]H66-22: 2200 mm x 600 mm x 600 mm [87 in. x24 in. x 24 in.]Normalized N66-22: 2200 mm x 600 mm x 600mm [87 in. x 24 in. x 24 in.]



6-7

Item Specification

Cabinet weight N68-22: 95 kg [209 lb]N68E-22: 59kg [130 lb]N66-22: 100 kg [221 lb]H66-22: 110 kg [243 lb]Normalized N66-22: 73 kg [161 lb]

Frame dimension (height x width x depth) SSM-4: 219.5 mm (5 U) x 436 mm x 300 mm [9in. x 17 in. x 12 in.]

Frame weight SSM-4: 9 kg [20 lb] for an empty frame, andabout 20 kg [44 lb] for a full configured frame

Maximum weight of the wholeUMG8900

TG application:Single N68-22 cabinet: 185 kg [408 lb]Single N68E-22 cabinet: 149 kg [329 lb]Single N66-22 cabinet: 160 kg [353 lb]Single H66-22 cabinet: 175 kg [386 lb]Single normalized N66-22 cabinet: 133 kg [293lb]AG application:Single N68-22 cabinet: 210 kg [463 lb]Single N68E-22 cabinet: 174 kg [384 lb]Single N66-22 cabinet: 185 kg [408 lb]Single H66-22 cabinet: 195 kg [430 lb]Single normalized N66-22 cabinet: 158 kg [348lb]

Bearing capacity > 600 kg/m2[0.85 lbf/in.2]

Noise of the whole UMG8900 < 60 dB (at normal temperature)

6.3.3 Safety SpecificationsThis describes the safety specifications that the UMG8900 complies with.

The UMG8900 complies with IEC60950, EN60950, UL60950, AS/NZS60950, GR63, GR1089,and GB4943.

6.3.4 EMC SpecificationThis describes the electromagnetic compatibility (EMC) specifications of the UMG8900.

l EN 55022 class A

l CISPR 22 class A

l ETSI EN 300 386


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Issue 02 (2009-01-09)

l VCCI V-3 class A

l ICES-003

l AS/NZS CISPR 22

l CNS 13438

l FCC PART 15 class A

l GB9254 class A

l ETSI ES 201468 level 2

The UMG8900 complies with the following specifications:

l EN 55022 class A

l CISPR 22 class A

l ETSI EN 300 386

l ICES-003

l AS/NZS CISPR 22

l CNS 13438

l GB9254 class A

6.4 Environmental SpecificationsThis describes the environmental specifications of the cabinets.

Environmental specifications cover the specifications for storage environment, transportationenvironment, and running environment.

l ETS 300019 Equipment Engineering (EE); Environmental conditions and environmentaltests for telecommunications equipment

l IEC 60721 Classification of environmental conditions

Table 6-11 lists the general environmental specifications.

Table 6-11 General environmental specifications

Item Specification

WorkingEnvironment

StorageEnvironment(Package StorageWithoutTemperatureControl Indoors)

TransportationEnvironment(PackageTransportation)

Temperature Long term: 0°C to 45°C [32℉ to 113℉]Short term: –5°C to55°C [23℉ to 131℉]

Temperature range: –40°C to +70°C[104℉ to 158℉]

Temperature: –40°C(no ventilation) to+70°C [104℉ to158℉]



6-9

Item Specification

WorkingEnvironment



Relativehumidity

Long term: 5% to 85%(1 g/m3 to 25 g/m3)Short term: 5% to 95%(1 g/m3 to 29 g/m3)

10% to 100% 5% to 100%

Height above sealevel

≤ 4000 m [2.5 mi] ≤ 5000 m [3.1 mi]

Wind speed < 5.0 m/s < 30 m/s < 20 m/s

Solar radiation 700 W/m2 1120 W/m2

Heat radiation 600 W/m2

Short-term rain It is prohibited tooperate the device inthe open air.

6 mm/min

IP level IP22

NOTE

Short term means that the consecutive working duration is not more than 96 hours and the accumulativeduration is not more than 15 days in a year.

Table 6-12 lists the air cleanness specifications.

Table 6-12 Air cleanness specifications

EnvironmentChemicalConstitution

Reference Value for Upper Limit of Specification

Long-Term WorkingEnvironment



SO2 0.3 mg/m3 to 1.0 mg/m3 1.0 mg/m3

H2S 0.1 mg/m3 to 0.5 mg/m3 0.5 mg/m3

Cl2 0.1 mg/m3 to 0.3 mg/m3 Not required

HCl 0.1 mg/m3 to 0.5 mg/m3 0.5 mg/m3


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Issue 02 (2009-01-09)

EnvironmentChemicalConstitution

Reference Value for Upper Limit of Specification

Long-Term WorkingEnvironment



NOX 0.5 mg/m3 to 1.0 mg/m3 1.0 mg/m3

NH3 1.0 mg/m3 to 3.0 mg/m3 3.0 mg/m3

HF 0.01 mg/m3 to 0.03 mg/m3 0.03 mg/m3

O3 0.05 mg/m3 to 0.1 mg/m3 0.1 mg/m3

Precipitabledust

1.5 mg/m2h 20 mg/m2h 3.0 mg/m2h

Suspendingdust

0.2 mg/m3 5.0 mg/m3 Not required

Sand 30 mg/m3 300 mg/m3 100 mg/m3

Table 6-13 lists the anti-vibration specifications when the device is running.

Table 6-13 Anti-vibration specifications for device running

Item Sub-Item Range

Sinusoidaloscillation

Frequency 5 Hz to 9 Hz 9 Hz to 200 Hz

Amplitude ≤ 3.5 mm [0.1 in.] None

Peak acceleration None 1 g

Direction 3 axial directions, 6 planes

Times Plus or minus three times in each axial direction,once in each plane

Percussion Percussion waveform Semi-sinusoidal wave

Peak acceleration 5 g

Pulse width 11 ms


Times Plus and minus three times in each axial direction,once in each plane



6-11

Item Sub-Item Range

Earthquake – EUROPEAN ETS 300 019-1-3-Amd(recommended). It can withstand earthquakeintensity of 7 to 9 level.

NOTE1 g equals to 9.8 m/s2.

Table 6-14 lists the anti-vibration specifications during delivery (in 2M3 level packagetransportation).

Table 6-14 Anti-vibration specifications for device delivery

Item Sub-Item Range

Random oscillation(for duration of 30minutes in each axialdirection)

Vertical 5 Hz to 10 Hz ASD: 13 m2/s3

10 Hz to 200 Hz ASD: 3 m2/s3

200 Hz to 500 Hz ASD: 1 m2/s3

Landscapeorientation andlongitudinal

5 Hz to 10 Hz ASD: 10 m2/s3

10 Hz to 200 Hz ASD: 1 m2/s3

200 Hz to 500 Hz ASD: 0.3 m2/s3

Collision Collision waveform Semi-sinusoidal wave


Pulse width 11 ms

Direction Six directions

Times 500 times in each direction

Percussion Percussionwaveform

Semi-sinusoidal wave


Pulse width 6 ms


Times Plus and minus three times in each axialdirection, once in each plane

Free Fall Weight range ≤ 15 kg [33 lb]

Fall height 100 cm [39.4 in.]

Plane Six planes


Product Description


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Item Sub-Item Range

Times Once in each plane

NOTEASD: Acceleration spectrum density

The mechanical stress of the storage conditions is the same as that of the transportationconditions.



6-13

A Glossary

Numerics

3GPP See 3rd generation partnership project

3rd generationpartnership project

Founded in 1998, a project which aims to expedite the development of open, globallyaccepted technical specifications for the Universal Mobile Telecommunications System(UMTS), including the WCDMA and TD-SCDMA specifications. The WCDMAspecifications developed by the 3GPP include 3GPP R99, R4, R5, R6, and R7.

A

A interface An interface between the BSS and MSC. It is a 2G interface. Its physical link adopts the2.048 Mbit/s PCM digital transmission link to transmit the information related to callprocessing, mobility management and BSS management. It adopts the BSSAP protocol.

AAL See ATM adaptation layer

access A link between the customer and the telecommunication network. Many technologies,such as the copper wire, optical fiber, mobile, microwave and satellite, are used foraccess.

access control list A series of sequential rules consisting of permit | deny statements. In firewall, after ACLis applied to an interface on the router, the router decides which packet can be forwardedand which packet should be denied. In QoS, ACL is used to classify traffic.

access network A local part of a telecommunication network. It is closest to the subscriber's home orenterprise and opposite to the core network.

ACL See access control list

add/drop multiplexer A digital multiplexing device that offers interfaces between different signals in anetwork.

address A number that identifies the location of a device in a network or the location on the harddisk or the memory, such as the IPv4 address or IPv6 address of a network entity.

address resolutionprotocol

A protocol used in the IP network to map an IP address to a MAC address and thus enablethe transmission of IP datagram across a LAN.

HUAWEI UMG8900 Universal Media GatewayProduct Description A Glossary


A-1

adjacency A portion of the local routing information which pertains to the reachability of a singleneighbour ES or IS over a single circuit. Adjacencies are used as input to the DecisionProcess for forming paths through the routing domain. A separate adjacency is createdfor each neighbouron a circuit, and for each level of routeing (i.e. level 1 and level 2) ona broadcast circuit.

ADM See add/drop multiplexer

AGC See automatic gain control

AH See authentication header

american nationalstandards institute

The American National Standards Institute is a voluntary membership organization (runwith private funding) that develops national consensus standards for a wide variety ofdevices and procedures.

AN See access network

analog signal A signal sent by an analog system without restriction specified on transmitted data.

ANSI See american national standards institute

application serviceprovider

A business that provides computer-based services to customers over a network.

APS See automatic protection switching

APS 1+1 Indicates that the protective group uses the master/slave interfaces mode. The APSprotective mode is supported.One protection group has one work channel and oneprotection channel. The switchover is performed based on the APS protocol. In thenormal state, the work channel is working. If an APS switchover event is detected bythe work channel, the services are switched to the protection channel.

APS 1:N Indicates that the protective group uses one protective channel and N pieces of workingchannels. The APS protective mode is supported. One protection group has N workchannels and one protection channel. The switchover is performed based on the APSprotocol. In the normal state, N work channels are working. If an APS switchover eventis detected by one work channel, the services are switched to the protection channel. TheAPS protection requires the interconnected device to support the APS protocol.

area A routing subdomain that maintains the detailed routing information about its owninternal composition and the routing information enabling it to reach the other routingsubdomains.In IS-IS and OSPF, it is a set of adjacent networks and hosts that have beenadministratively grouped together within an autonomous system. In IS-IS, an areacorresponds to a Level 1 subdomain.

ARP See address resolution protocol

ASP See application service provider

association Logical association or channels that are established between two SCTP endpointsaccording to the four-handshake system of the SCTP protocol.

asynchronousannouncement

A digital announcement not always played by the MGW from beginning when receivingan announcement request. This kind of digital announcement is the asynchronousannouncement. Therefore, a subscriber might hear a section of an announcement playedrepeatedly from beginning or middle. The MGW can play a broadcast announcement formultiple subscribers (no limit to the number of subscribers) at a time. The basic serviceannouncement is a common asynchronous announcement.

A GlossaryHUAWEI UMG8900 Universal Media Gateway

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asynchronous transfermode

A data transfer technology based on cell, in which packets allocation relies on channeldemand. It supports fast packet switching so that the network resources can be usedefficiently. The size of a cell is fixed, 53 bytes in total. Here, 48 bytes form the payloadand the other five bytes form the header.

ATM See asynchronous transfer mode

ATM adaptation layer A collection of protocols that enable the voice, data, image, and video traffic to run overan ATM network.

ATM switch A switch to transmit cells through an ATM network. It receives the incoming cell froman ATM termination or another ATM switch, analyzes and updates the cell headerinformation, and then switches the cell to an output interface towards the destination.

authentication header It is a type of IPv6 extension headers, and is also a kind of IPsec. It ensures data integrity,authenticates original identities, and provides some optional and limited anti-replayservices for IP.

auto negotiation A procedure defined in Fast Ethernet in which a device accords with another device ona transmission mode before transmitting data. The mode can be 100 Mbit/s or 10 Mbit/s and full or half duplex.

automatic gain control A process or means by which gain is automatically adjusted in a specified manner as afunction of a specified parameter, such as received signal level.

automatic protectionswitching

Automatic Protection Switching (APS) is the capability of a transmission system todetect a failure on a working facility and to switch to a standby facility to recover thetraffic.

available user capacity A capacity that specifies the number of new access users that the MSC server canaccommodate. For example, if the initial capacity of the MSC server is 2000000, theavailable user capacity is 1500000 on condition that 500000 users are currently on line.

B

backup flag It specifies whether the CN node is centralized backup MSC. The information of all theregistered mobile phones in the pool is backed up to the centralized backup MSC.

bandwidth A range of transmission frequencies that a transmission line or channel can carry in anetwork. In fact, it is the difference between the highest and lowest frequencies thetransmission line or channel. The greater the bandwidth, the faster the data transfer rate.

base station A fixed radio transmitter/receiver that relays signals from and to the mobile terminals orhandsets electronically within a specified range. It accommodates the devices that arenecessary to set up and complete calls on handsets, such as the antenna and computer.

base station controller Base Station Controller. A logical entity that connects the BTS with the MSC in a GSMnetwork. It interworks with the BTS through the Abis interface, the MSC through the Ainterface. It provides the following functions: Radio resource management Base stationmanagement Power control Handover control Traffic measurement One BSC controlsand manages one or more BTSs in an actual networking.

base station subsystem A physical device that gives radio coverage to a specific geographical zone called a cell.It consists of the BTS and BSC.



A-3

base station subsystemapplication part

The protocol employed across the A interface in the GSM system. It is used to transportMM (Mobility Management) and CM (Connection Management) information to andfrom the MSC (Mobile Switching Centre). The BSS Application Part (BSSAP) is splitinto two sub application parts, these are: the BSS Management Application Part(BSSMAP) and the Direct Transfer Application Part (DTAP).

base station subsystemmanagementapplication part

This protocol is also used to convey general BSS (Base Station System) controlinformation between the MSC (Mobile Switching Centre) and the BSS. An example isthe allocation of traffic channels between the MSC and the BSS.

BFD See bidirectional forwarding detection

bidirectionalforwarding detection

A simple hello mechanism to detect failures in a network and work with the routingprotocols to expedite failure detection.

bit The smallest unit of information that can be used by a computer. It is a binary digit thatcan be 0 or 1.

BITS See building integrated timing supply system

bits per second A rate at which the individual bits are transmitted through a communication link orcircuit. Its unit can be bit/s, kbit/s, and Mbit/s.

BPS See bits per second

broadband A term that indicates the capacity with enough bandwidth to transmit voice, data andvideo signals. It supports transmission of large amount of information.

broadcast An operation of sending electromagnetic signals to many receivers through the air or thepublic service network so that the information or programs can be transmitted at the sametime. It also refers to the telecommunication mode that information sent by a terminalcan be received by multiple receiving terminals in the computer network at the sametime.

BSC See base station controller

BSS See base station subsystem

BSSAP See base station subsystem application part

BSSMAP See base station subsystem management application part

BTS See base station

building integratedtiming supply system

In the situation of multiple synchronous nodes or communication devices, one can usea device to set up a clock system on the hinge of telecom network to connect thesynchronous network as a whole, and provide satisfactory synchronous base signals tothe building integrated device.

burst A process of forming data into a block of the proper size, uninterruptedly sending theblock in a fast operation, waiting for a long time, and preparing for the next fast sending.

busy tone A tone indicating that the called party is busy.

byte A unit of computer information equal to eight bits.

C

call loss A process during which a call cannot be set up or released owing to an error or failure.

CAS See channel associated signaling


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CAS multiframe A multiframe set up based on timeslot 16. Each CAS multiframe contains 16 E1 PCMframes. Among the eight bits of timeslot 16 in the first of the 16 frames, the first fourbits are used for multiframe synchronization. The multiframe alignment signal (MFAS)for synchronization is 0000. The last four bits are used as the not multiframe alignmentsignal (NMFAS). The NMFAS is XYXX. For the other 15 frames, timeslot 16 is usedto transmit the exchange and multiplexing (E&M) signaling corresponding to eachtimeslot.

CBR See constant bit rate

CCS See common channel signaling

CDMA See code division multiple access

CDMA2000 A 3G technology developed by Qualcomm of the US. Technology competitive withWCDMA, upgraded form CDMA1, and developed by the GSM community as aworldwide standard for 3G mobile.

cell A geographic area in a cellular mobile telephone system where a cell site controls allcellular transmission.

centralized backupMSC server

An MSC server in the MSC pool. This MSC server backs up the user data of each MSCserver/VLR in the MSC pool. In addition, the MSC server backs up the call services forsingle MSC servers in the MSC pool when they are faulty and restores the call servicesfor the faulty MSC servers after they are recovered. Different from other MSC servers,no NRI is available for the centralized backup MSC server, and the uplink SCCP CRmessages are not distributed to the centralized backup MSC server.

centralized forwarding Forwarding of OMC packets, H.248 packets and SIGTRAN packets through one IPinterface. It can save IP address resources and avoid the complexed networking.

challenge handshakeauthentication protocol

A method of authentication that you can use when connecting to an ISP that allows youto log on automatically.

channel A telecommunication path of a specific capacity and/or at a specific speed between twoor more locations in a network. The channel can be established through wire, radio(microwave), fiber or a combination of the three.

channel A channel refers to the CDR processing mode and storage directories that match a sortingcondition. A channel corresponds to a CDR storage path.

channel associatedsignaling

Channel Associated Signaling. A signaling system in which the signaling information istransmitted within the voice channel. China Signaling System No. 1 is a kind of CASsignaling.

CHAP See challenge handshake authentication protocol

circuit pool A group of trunk circuits that are identical in bearer capability.

CNG See comfort noise generation

code division multipleaccess

CDMA is a form of wireless multiplexing, in which data can be sent over multiplefrequencies simultaneously, optimizing the use of available bandwidth. In a CDMAsystem, data is broken into packets, each of which are given a unique identifier, so thatthey can be sent out over multiple frequencies and then re-built in the correct order bythe receiver.

comfort noisegeneration

The CNG is the algorithm that is used to generate comfort noise. The CNG expands thelower rate noise modeling data into a standard frame of G.729 data by filling in some ofthe less significant parameters. It then performs G.729 synthesis to generate the comfortnoise.



A-5

common channelsignaling

Common Channel Signaling. A signaling system used in telephone networks thatseparates signaling information from user data. A specified channel is exclusivelydesignated to carry signaling information for all other channels in the system. ChinaSignaling System No. 7 is a kind of CCS signaling.

congestion An extra intra-network or inter-network traffic resulting in decreasing network serviceefficiency.

constant bit rate An ATM service category supporting applications like voice and video that require aconstant bit rate.

CRC-4 multiframe A multiframe is recommended by ITU-T G.704 and set up based on the first bit of timeslot0. The CRC-4 multiframe is totally different from the CAS multiframe in principle andimplementation. Each CRC-4 multiframe contains 16 PCM frames. Each CRC-4multiframe consists of two CRC-4 sub-multiframes. Each CRC-4 sub-multiframe is aCRC-4 check block that contains 256 x 8 = 2048 bits. Bits C1 to C4 of a check blockcan check the previous check block.

D

differentiated servicescode point

Values for a 6-bit field defined for the IPv4 and IPv6 packet headers that enhance classof service (CoS) distinctions in routers.

digital network A telecommunication network where information is first converted into distinctelectronic pulses and then transmitted to a digital bit stream.

DNS See domain name service/server

domain name service/server

An Internet protocol to relate the service names or URLs to an IP address and conversely.

double wrapping A coding mode. In binary codec, parameters of the OCTET STRING type are coded withthe standard BER grammar, and then H.248 binary coding is performed. It is stipulatedin the H.248V2 protocol. For details, refer to the H.248V2 protocol.

DSCP See differentiated services code point

DTMF See dual tone multi-frequency

dual homing A solution in which signaling transfer points are configured in pairs, that is, eachsignaling point connects two signaling transfer points. Dual homing solutions can be 1+1 master/slave backup, 1+1 mutual aid, N+1 backup, and N+1 mutual aid. The dualhoming solution is a network security solution put forward by Huawei first. This solutionis used to ensure the security of MSC servers. Nowadays, the dual homing solution isapplied in multiple commercial networks.

dual tone multi-frequency

It is an analogue inband access signalling system.

DW See double wrapping

E

E-LABEL See electronic label

E1 A European standard for high-speed data transmission at 2.048 Mbit/s. It provides 32 x64 kbit/s channels.

EC See echo cancellation


Product Description


Issue 02 (2009-01-09)

echo In the traditional PSTN network, an echo is caused by the 2/4 wire conversion. In acommon session, the end-to-end delay is small, an echo can be rapidly transmitted to theears of speakers, and thus it is not easily felt. In long-distance calls or international long-distance calls, however, the end-to-end delay is big, and the echo canceller must be usedto control echoes.

echo cancellation Echo cancellation indicates to configure an echo canceller (usually called EC) in thecommunication network with the echo problem to reduce or eliminate echoes.

EFR See enhanced full rate

electronic label The label that stores the codes for identifying objects in the format of electronic data.Withthe feature of large capacity, high confidentiality, read-write capability and working inhad condition, it is much better than other electronic label.

element managementsystem

An element management system (EMS) manages one or more of a specific type ofnetwork elements (NEs). An EMS allows the user to manage all the features of each NEindividually, but not the communication between NEs - this is done by the networkmanagement system (NMS).

EMS See element management system

encapsulating securitypayload

Encapsulating Security Payload is used in the transmission mode and tunnel mode. Itadopts the encryption and authentication mechanism and provides the services such asdata source authentication, data completeness, anti-replay, and secret security.

encapsulation A procedure of packetizing a protocol data unit in a group of protocol header and tail.

encryption A method used to guarantee the security and authenticity of data in end-to-endtransmission. Encryption can be implemented through technologies such as data pseudo-random alteration and data substitution.

end system A network entity that sends and receives packets in IS-IS.

enhanced full rate A technology that improves the quality of calls made on a digital mobile network. It isachieved through more efficient use of bandwidth.

error correction Technique for restoring integrity in data that is corrupted during transmission. It requiresadditional information to be sent with the original data and allows the data to bereconstructed from this information if the original data is corrupted.

ESP See encapsulating security payload

ethernet A local technology based on CSMA/CD, The speed of Ethernet can be 10 Mbit/s, 100Mbit/s, 1000 Mbit/ s or 10000 Mbit/s. It is easily maintained and of high reliability.

extend superframe The multiframe format of T1. Each multiframe comprises of 24 single frames.

F

file transfer protocol FTP is commonly used application. It is the Internet standard for file transfer. The filetransfer provided by FTP copies a complete file from one system to another system. Touse FTP we need an account to login to on the server, or we need to use it with a serverthat allows anonymous FTP (which we show an example of in this chapter).

firewall A security gateway that is positioned between two different networks, usually betweena trusted network and the Internet.

flow Data amount through a piece of equipment within a unit of time.



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flow control A method used to control the data packets that traverse a device so that the device is notto be overloaded because of heavy traffic.

FR AMR codecalgorithm

A full rate AMR codec algorithm that can be used only in GSM networks. The bit ratecan be 4.75 kbit/s, 5.15 kbit/s, 5.90 kbit/s, 6.70 kbit/s, 7.40 kbit/s, 7.95 kbit/s, 10.2 kbit/s, or 12.2 kbit/s. The AMR algorithm is an adaptive rate-based codec algorithm, whichadopts the algebraic code excitation linear prediction (ACELP) mechanism.

frame Logical grouping of information sent as a data link layer unit over a transmissionmedium. Often refers to the header and the trailer, used for synchronization and errorcontrol, that surround the user data contained in the unit. The terms cell, datagram,message, packet, and segment also are used to describe logical information groupings atvarious layers of the OSI reference model and in various technology circles.

frequency The number of completing tasks per unit of time with Hz as its unit. 1 Hz = 1 cycle persecond.

frequency shift keying FSK is used in low speed modems to modulate data that uses two frequencies, one ofwhich is used to represent a binary one and the other a binary zero. In full-duplextransmission, two different frequencies are used in each direction, which leads to fourdifferent frequencies being used.

FSK See frequency shift keying

FTP See file transfer protocol

full duplex It is a mode to transmit signals along a bearer channel or carrier in both directions at thesame time.

full rate A rate for transmitting data services. The service bandwidth can be 9.6 kbit/s, 4.8 kbit/s, or 2.4 kbit/s.

G

gateway A device that implements protocol conversion between different devices or networks.

gateway GPRS supportnode

It is short for gateway GPRS support node. In the IMS, a UE can find the entry point ofthe IMS through the GPRS process. That is, it can obtain the IP address of the P-CSCFthrough the GGSN.

gCause An event type stipulated in the H.248 protocol.

global system formobilecommunications

Abbreviated GSM. The second-generation mobile networking standard defined by ETSI.

GSM See global system for mobile communications

GSM EFR codecalgorithm

The GSM enhanced full rate (EFR) algorithm, a compressed mixed codec algorithmbased on the GSM network. It adopts the code excited linear prediction (CELP)technology, and the compressed bit rate is 12.2 kbit/s. Fully considering the spectrumtransition characteristic of the voice, this codec mode improves the codec algorithm ofthe voice source to make the voice quality clear and sufficient, thus improving the voicequality greatly. When the bandwidth used in the EFR algorithm is the same as that in theFR algorithm, the EFR algorithm can improve the call quality under the condition ofweak signals through a more advanced algorithm. This codec mode is used in GSMnetworks.


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GSM FR codecalgorithm

The GSM full rate (FR) algorithm, a compressed mixed codec algorithm. It adopts theregular-pulse excitation-long term prediction (RPE-LTP) codec technology, and thecompressed bit rate is 13 kbit/s. The outstanding characteristic of this codec mode is itsstability, namely, it has relative stable voice quality under different mobile noisebackgrounds and unstable wireless transmission condition (different error modes). Thiscodec mode is used in GSM networks.

H

half rate A variant of GSM, Half-Rate doubles system capacity by more efficient speech coding.The conversion of the voice to digital packets can be done 3 ways, using Half Rate coding(HR), Full Rate coding (FR) or Enhanced Full Rate coding.

HR See half rate

HR AMR codecalgorithm

A half rate AMR codec algorithm that can be used only in GSM networks. The bit ratecan be 4.75 kbit/s, 5.15 kbit/s, 5.90 kbit/s, 6.70 kbit/s, 7.40 kbit/s, or 7.95 kbit/s. TheAMR algorithm is an adaptive rate-based codec algorithm, which adopts the algebraiccode excitation linear prediction (ACELP) mechanism.

HR codec algorithm A half rate GSM voice encoding algorithm.

I

ICMP See internet control message protocol

IETF See internet engineering task force

IKE See internet key exchange

integrated servicesdigital network

Integrated Services Digital Network (ISDN) is comprised of digital telephony and data-transport services offered by regional telephone carriers. ISDN involves the digitizationof the telephone network, which permits voice, data, text, graphics, music, video, andother source material to be transmitted over existing telephone wires.

intermediate system-to-intermediate system

Intermediate System-to-Intermediate System. OSI link-state hierarchical routingprotocol based on DECnet Phase V routing whereby ISs (routers) exchange routinginformation based on a single metric to determine network topology.

international standardsorganization

A United Nations agency, based in Geneva, Switzerland, responsible for worldwidestandards, including many networking standards. The OSI reference model, publishedas ISO standard 7498, was jointly developed by the ISO and the ITU.

internationaltelecommunicationunion

A United Nations agency, one of the most important and influential recommendationbodies, responsible for recommending standards for telecommunication (ITU-T) andradio networks (ITU-R).

internet A global network that uses IP to link various physical networks into a single network.

internet controlmessage protocol

An extension to the Internet Protocol. It allows for the generation of error messages, testpackets and informational messages related to IP.

internet engineeringtask force

An international community of network designers, operators, vendors, and researchers.IETF focuses on the evolution of the Internet architecture and the smooth operation ofthe Internet.



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internet key exchange An optional function of the IPSec that provides ways for encryption. It is used to providethe function of sharing the internet key through negotiating whether the AH Header andthe ESP Header of the IPSec packet are consistent.

internet protocol A protocol that enables data to be sent from one point to another on the Internet.

internet securityassociation and keymanagement protocol

A protocol that allows the message receiver to get a public key and use digital certificatesto authenticate the sender's identity.

IP See internet protocol

IP address An exclusive address on the Internet for each interface, which is 32 bits long. An IPaddress indicates a connection to a network, not a host.

IP security protocol A general designation of a set of open protocols. With the IPSec, the encryption and datasource verification between specific communication parties can ensure theconfidentiality, intactness, and authenticity of data packets when they are transmittedover the Internet.

IPSec See IP security protocol

IS-IS See intermediate system-to-intermediate system

ISAKMP See internet security association and key management protocol

ISDN See integrated services digital network

ISO See international standards organization

ITU See international telecommunication union

J

jitter The variation in the time taken for packets to be delivered to a termination or networkentity.

L

LAN See local area network

LAPV5 signaling link A layer-2 link on the V5 interface. The V5 interface is the interface between the accessnetwork and switches, and it is a service node interface (SNI).

link It is the physical or logical connection for two pieces of equipment to communicate witheach other.

local area network A network intended to serve a small geographic area, (few square kilometers or less), asingle office or building, or a small defined group of users. It features high speed andlittle errors. Ethernet, FDDI and Toke Ring are three technologies implemented in LAN.

M

M3UA destinationentity

An M3UA logical entity that equals the MTP3 destination signaling point.

MAC See media access control


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maximum transmissionunit

The MTU (Maximum Transmission Unit) is the size of the largest datagram that can besent over a network.

MD5 See message digest 5

media access control Media Access Control is the lower of the two sublayers of the Data Link Layer. In generalterms, MAC handles access to a shared medium, and can be found within many differenttechnologies. For example, MAC methodologies are employed within Ethernet , GPRS ,and UMTS etc.

media gateway Media Gateway. A logical entity that converts the format of the media of a network tomeet the format requirement of another network. It can process audio services, videoservices and data services, and convert the media format in full duplex mode. In addition,it can play certain audio and video signals, and provide the IVR function and mediaconference.

media gatewaycontroller

The Media Gateway Controller (MGC), also known as Call Agents or Soft Switches,handles registration, management, and control functionality of resources in the MediaGateway (MG).

message digest 5 One-way hashing algorithm that generates a 128-bit hash for producing messageauthentication signatures.

message transfer part A part of the Signaling System 7 (SS7) used for communication in Public SwitchedTelephone Networks. MTP Level 3 provides routing functionality to transport signalingmessages through the SS7 network to the requested termination.

message transfer partlevel 3(broadband)

Message Transfer Part level 3 broadband provides message routing, discrimination anddistribution (for point to point link only). It also provides signalling link management,load sharing and changeover between links within one link-set. The protocol is abroadband ISDN based protocol used typically in ATM (Asynchronous Transfer Mode).

message type A descriptor that identify the function of a message. Stimulus call control has onemessage type, that is, information, while, the functional call control has several messagetypes concerning call connection, call disconnection, and call status.

MGC See media gateway controller

MGW See media gateway

MIN See mobile identification number

mobile identificationnumber

A number that identifies a mobile unit in wireless carrier's networks, and dials from othernetworks or fixed lines. In addition, it can be electronically checked to help prevent fraud.

mobile station A mobile device, such as cellular phones or mobile personal digital assistants (PDAs).

mobile switching center Mobile Switching Center. A logical entity that provides interfaces for interworking withthe function entities in a GSM/WCDMA system and the public network. It plays a corerole for switch in the GSM/WCDMA system. It provides mobile management and switchto mobile subscribers and sets up communications between mobile subscribers, orbetween a mobile subscriber and a fixed line subscriber.

modem A device that enables data to be exchanged by interpreting and converting both analoguesignals and digital signals.

MPLS See multiprotocol label switching

MS See mobile station

MSC See mobile switching center



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MSC pool A pool formed by multiple MSC servers that serve a pool area. A device in the accessnetwork interconnects with multiple MSC servers in the pool.

MTP See message transfer part

MTP3b See message transfer part level 3(broadband)

MTU See maximum transmission unit

multiplexer An equipment which combines a number of tributary channels onto a fewer number ofaggregate bearer channels, the relationship between the tributary and aggregate channelsbeing fixed.

multiprotocol labelswitching

A technology that uses short tags of fixed length to encapsulate packets in different linklayers, and provides connection-oriented switching for the network layer on the basis ofIP routing and control protocols. It improves the cost performance and expandability ofnetworks, and is beneficial to routing.

MUX See multiplexer

N

narrowband A term used to depict the communication services that transmit over TDM timeslot. ThePSTN is normally a narrowband network. A communication channel whose transmissionrate is lower than 2 Mbit/s is usually considered to be narrowband.

network In communications, a system of interconnected communication facilities.

network service accesspoint

A connection to a network that is identified by a network address.

network time protocol The Network Time Protocol was developed to maintain a common sense of "time" amongInternet hosts around the world. Many systems on the Internet run NTP, and have thesame time (relative to Greenwich Mean Time), with a maximum difference of about onesecond.

non APS 1+1 Indicates that the protective group uses the master/slave interfaces mode. The APSprotective mode is not supported.One protection group has two interfaces, one masterand the other slave. Services are switched based on the UP/DOWN status of theinterfaces. In the normal state, the master interface is working. If the master interfacebecomes DOWN, services on it are switched to the slave interface. This mode can beautomatically supported by hardware for some interfaces, and is not required to beconfigured.

non APS 1:N Indicates that the protective group uses one protective channel and N pieces of workingchannels. The APS protective mode is not supported.One protection group has N+1interfaces, and services are switched based on the UP/DOWN status of the interface. Inthe normal state, N interfaces are working. When one interface becomes DOWN, serviceson it are switched to the slave interface.

NSAP See network service access point

NTP See network time protocol

number of ATMterminations

The point in an ATM network where an ATM connection is initiated or terminated. ATMterminations include ATM-attached workstations, ATM-attached servers, ATM-to-LAN switches, and ATM routers. ATM

number of IPterminations

The number of concurrently available IP terminations on a gateway.


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P

packet Data packets and local packets. Logical grouping of information that includes a headercontaining control information and (usually) user data. Packets are most often used torefer to network layer units of data.

packet forwarding When a router receives a datagram, it is found that the destination IP address of thedatagram do not match the IP address of the router, then the router queries the route listand forwards the datagram to another router or the destination host.

packet losscompensation

A technology of compensating packets according to an appropriate algorithm if packetsare lost in the transmission.

packet over SDH Packets transmitted over SDH.

PAP See password authentication protocol

parity A method for character level error detection. An extra bit added to a string of bits, usuallya 7-bit ASCII character, so that the total number of bits 1 is odd or even (odd or evenparity). Both ends of a data transmission must use the same parity. When the transmittingdevice frames a character, it counts the numbers of 1s in the frame and attaches theappropriate parity bit. The recipient counts the 1s and, if there is parity error, may askfor the data to be retransmitted.

passwordauthentication protocol

A method for verifying the identity of a user attempting to log on to a Point-to-PointProtocol (PPP) server. PAP is used if a more rigorous method, such as the ChallengeHandshake Authentication Protocol (CHAP), is not available or if the user name andpassword that the user submitted to PAP must be sent to another program withoutencryption.

PBX See private branch exchange

PCM See pulse code modulation

PCR See peak cell rate

PDH See plesiochronous digital hierarchy

peak A time period when calls are the busiest in terms of service traffic.

peak cell rate The maximum rate at which an ATM connection can accept cells.

pending transaction A transaction type stipulated in the H.248 protocol. For details, refer to the H.248protocol. When a transaction lasts for a long time and the gateway processes thetransaction, the gateway sends a Pending transaction to the MGC to inform the MGC ofthe processing to avoid retransmission.

performancemanagement

One of five categories of network management defined by ISO to manage the OSInetworks. Performance management subsystems are in charging of analyzing andcontrolling network performance, including network throughput and error rates.

ping A method of testing whether a device in the IP network is reachable according to sentICMP Echo messages and received the response messages.

PLC See packet loss compensation



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plesiochronous digitalhierarchy

A technology used in telecommunications networks to transport large quantities of dataover digital transport equipment such as fibre optic and microwave radiosystems.Plesiochronous Digital Hierarchy is the first multiplexing hierarchy used indigital transmission systems. The base frequency was 64Kbit/s, multiplexed up to 2048,8448, 34,368 and 139,264Mbit/s. There was more than one standard system and it variedbetween Europe, the US and Japan.

PM See performance management

point-to-point protocol Point-to-Point Protocol. A widely used WAN protocol designed to provide router torouter and host to network connections over synchronous and asynchronous circuits. Inaddition, PPP has a built-in security mechanism.

pool A concept raised in 3GPP TS 23.236. It means that multiple serving CN nodes in thenetwork form a pool area. Within this area, an MS can roam at will without changingthe serving CN node.

port A physical or logical communication interface.

POS See packet over SDH

PPP See point-to-point protocol

private branchexchange

A telephone switch for use inside a corporation.

profile negotiation A parameter for interconnection between the MGW and the peer MGC. Each profile canbe considered as a subset of the H.248 standard. ETSI_GateControl/1 defines theServiceChange message in a more detailed manner. For details, refer to ETSI TS 102333 V1.1.2. ETSI_Tgw/1 defines partial subsystems in the NGN. For details, refer toETSI ES 283 024 V1.1.1. FT_Tgw/1 defines and expands partial subsystems in the NGN.For details, refer to ETSI ES 283 024 V<1.0.14>.

protocol On the Internet "protocol" usually refers to a set of rules that define an exact format forcommunication between systems.

PSTN See public switched telephone network

public switchedtelephone network

Network by which household and business phones are connected, typically byconventional fixed cables. It is the infrastructure providing a country's telephone systemand it is the original analog telephone network.

pulse A variation above or below a normal level and a given duration in electrical energy.

pulse code modulation A method of converting an analog voice signal to digital. It samples the signal 8,000times per second and encodes the signal amplitude as an 8 bit value. The produced digitaltransmission rate is 64 kbit/s.

Q

Q.921 signaling link An ISDN data link. The corresponding protocol is ITU-T Q.921.

QoS See quality of service

quality of service Short for Quality of Service, QoS refers to service capacity assessment of IP networkpackets. Typically, the capability of supporting service requirements such as delay, delayjitter, and packet loss is considered as the core assessment object. Certain supporttechnologies are required to meet the core requirements.


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R

radio networkcontroller

An entity that manages the radio part of the network in UMTS.

real time Pertaining to the processing of data by a computer in connection with another processoutside the computer according to time requirements imposed by the outside process.

real time variable bitrate

A rate that is intended for real-time applications. The rt-VBR services are connection-oriented with variable bit rates. The bandwidth used by a termination varies with theinformation sending rate of the termination. The ATM network guarantees thesustainable cell rate (SCR) for communication terminations, and requires that theterminations adopt rates equal to or lower than the peck cell rate (PCR) to sendinformation. rt-VBR is typically used in the services that require much on time sensitivitysuch as image services.

real-time controlprotocol

The statuses of sessions in the connection are contained in the packets to guarantee QoSof RTP.

real-Time transportprotocol

A host-to-host protocol that is used in real-time multimedia services such as Voice overIP (VoIP) and video.

RNC See radio network controller

route A route is a set of all sub-routes from local office to a destination office. A route containsmultiple sub-routes and different routes may contain the same sub-routes.

router It is a piece of equipment that can forward the data, which should not be routed to it. Inother words, a router can receive packets and forwards them to the right destination,because a router connects to more than one physical network.

rt-VBR See real time variable bit rate

RTCP See real-time control protocol

RTP See real-Time transport protocol

S

SCCP See signaling connection control part

SCTP association An association is the logic relationship, or channel, established between two SCTPendpoints for data transmission, through the four-way handshake mechanism prescribedin SCTP.

SCTP dual-homingnetworking mode

A networking of 3GPP R4 or later in which one MGW belongs to two MSC Servers.

SDH See synchronous digital hierarchy

security domain A set of elements, a security policy, a security authority and a set of security relevantactivities in which the set of elements are subject to the security policy, administered bythe security authority, for the specified activities. The Security Domain focuses on theidentification of industry standards related to cybersecurity and the creation of policiesto promote a more secure environment.

security parameterindex

A numeric identifier in IPsec, used with the destination address and security protocol toidentify a security association (SA).



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segmentation A term used to set limits to collision domains, which allows Ethernet networks to achievehigher performance. It is also called network segmentation.

server A network device that provides services to network users by managing shared resources,often used in the context of a client-server architecture for a LAN.

serving GPRS supportnode

A device in the mobile network that requests PDP contexts with a GGSN.

session initiationprotocol

An application layer protocol used for creating, modifying, and terminating a multimediasession in IP networks. It is part of the multimedia protocol system that IETF standardizesconstantly. The SIP protocol is used to initiate the interactive user sessions containingthe multimedia elements of video, voice, chatting, game, and virtual reality.

SGSN See serving GPRS support node

signaling The instructions and the signals that are transmitted among different levels of exchangesto enable the network to run normally as an entire entity and thus implement callconnections. The instructions control connections, and the signals indicate the executionresults and running status.

signaling connectioncontrol part

Signaling Connection Control Part. A protocol used by the SoftX3000 to establishcircuit-independent signaling connections with the VLR, HLR, EIR, MSC, SMC,GMLC, and SCP through the SS7 signaling network.

signaling point Signaling Point. A node that sends or receives signaling messages in a signaling network.

signaling system 7 A protocol used in telecommunication for delivering calls and services.SS7 typicallyemploys a dedicated 64 kilobit data circuit to carry packetized machine languagemessages about each call connected between and among machines of a network toachieve connection control.

signaling transfer point Signaling Transfer Point. A node that transfers messages received from a signaling linkto another. Element of an SS7-based Intelligent Network that performs routing of theSS7 signaling.

SIP See session initiation protocol

softswitch A term that refers to a softswitch device in a narrow sense. A softswitch provides callcontrol and connection control for real-time services. As the control core of the NGN,softswitches separate the services from the call control and the call control from thebearer, and adopt the application program interface (API) and standard protocols. Thismakes it easy for network carriers to develop new services and realize new features.

SONET See synchronous optical network

SP See signaling point

SPI See security parameter index

SS7 See signaling system 7

standard SGnetworking

A networking mode relative to the MSC Pool networking. In standard SG networkingmode, the UMG8900 serves only as an SG in signaling processing. The signalingmessages are processed only to the MTP3 layer. The UMG8900 does not resolve theMTP3 user contents; instead, the UMG8900 forwards them according to the destinationpoint codes in the messages.


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static route A route that cannot adapt to the change of network topology. Operators must configureit manually. When a network topology is simple, the network can work in normal stateif only the static route is configured. It can improve network performance and ensurebandwidth for important applications. Its disadvantage is: When a network is faulty orthe topology changes, the static route does not change automatically. It must be changedby operators.

STM See synchronous transport module

STP See signaling transfer point

stream index An index that is used to uniquely identify a media stream. It is stipulated in the H.248protocol. For details, refer to the H.248 protocol.

stream mode A mode that identifies the direction of the media stream on a termination. It is stipulatedin the H.248 protocol. For details, refer to the H.248 protocol.

subboard A type of board used in the separated architecture for the UMG8900. The board with theseparated architecture consists of the baseboard and the subboard that work jointly toimplement certain functions. Take the SPF as an example. The SPF subboard mainlyprocesses layer-2 narrowband signaling such as signaling on the MTP2 links, Q.921links, and LAPV5 links. The SPF baseboard typically processes layer-3 signaling.

subnet mask The technique used by the IP protocol to determine which network segment packets aredestined for. The subnet mask is a binary pattern that is stored in the client machine,server or router and is matched with the IP address.

SX See softswitch

synchronous digitalhierarchy

The European counterpart to SONET. SONET is an intelligent system that providesadvanced network management and a standard optical interface. Specified in theBroadband ISDN (B-ISDN) standard, SONET backbones are widely used to aggregateT1 and T3 lines. The European counterpart to SONET is the Synchronous DigitalHierarchy, and the term "SONET/SDH" is widely used when referring to SONET.

synchronous opticalnetwork

A North American standard for Synchronous Data Transfer over Optical Networks.

synchronous transportmodule

An information structure supporting section layer connections.

T

T1 A basic physical layer protocol that is used by the digital signal level 1 (DS1)multiplexing method in North America.

TCP See transmission control protocol

temporary mobilesubscriber identity

A temporary mobile station identification assigned by the MSC. The TMSI is stored inthe VLR and the SIM card and used by the MS to originate and receive calls. One TMSImaps to only one IMSI in a VLR area. The TMSI is used to conceal the internationalmobile subscriber identity (IMSI) for sake of security.

time to live A period of time starting when resources such as sessions and terminations are allocatedand ended when the resources are released.

TMSI See temporary mobile subscriber identity

topology The topology of a network describes the way computers are connected together.Topology is a major design consideration for cost and reliability.



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ToS See type of service

traffic The average number of calls made and received by call sources in a seizure duration.

transit Connection to and use of a telecommunication path that is provided by a vendor.

transmission controlprotocol

A connection oriented packet switching protocol that provides reliable data transmissionservice for applications on the Internet.

transmit mode The mode employed for transmission.

transparenttransmission

Transmission of signals over the network without any change of structures and data. Forsignals, the network is transparent.

tunnel One of the NAT traversal solutions. Configure the tunnel client in the private networkand the tunnel server on the proxy device. The client transmits packets to the serverthrough the UDP tunnel or HTTP tunnel.

tunnel mode An IPSec mode of operation in which the entire IP packet, including the header, isencrypted and authenticated and a new VPN header is added, which protects the entireoriginal packet.

type of service A field in an IP packet (IP datagram) that is used for quality of service (QoS). The TOSfield is 8 bits, broken into five subfields.

U

UBR See unspecified bit rate

UDP See user datagram protocol

UMTS See universal mobile telecommunication system

UMTS terrestrial radioaccess network

A WCDMA radio network in UMTS.

universal mobiletelecommunicationsystem

A system that is applied in the third-generation (3G) wireless networks. It transmits text,digitized voice and multimedia based on packet. The transmission rate of data can be upto 2 Mbit/s.

unspecified bit rate A transmission service that does not guarantee a fixed transmission capacity. Anyapplication that can tolerate delays is ideally satisfied by an UBR.

user datagram protocol A connectionless transport layer protocol, in TCP/IP, that exchanges datagram withoutacknowledgments or guaranteed delivery.

UTRAN See UMTS terrestrial radio access network

V

VAD See voice activity detection

variable bit rate QoS class defined by the ATM Forum for ATM networks. VBR is subdivided into a realtime (RT) class and non-real time (NRT) class. VBR (RT) is used for connections inwhich there is a fixed timing relationship between samples.

VBR See variable bit rate

VCI See virtual circuit identifier


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video gateway When the MGW serves as a VIG, audio, video and H.245 (multimedia communicationcontrol protocol) data is multiplexed in H.223 frames. The MGW needs to demultiplexH.223 frames and then transmits H.223 control protocol data transparently to the MGC.Thus, H.245 signaling links need to be set up between the MGW and the MGC. Thisconfiguration is unnecessary in other networking applications.

VIG See video gateway

virtual channel A term that enables queuing, packet scheduling, and accounting rules to be applied toone or more logical interfaces.

virtual circuit identifier A 16-bit field in the header of an ATM cell. The VCI, together with the VPI, identifiesthe next destination of a cell as it passes through a series of ATM switches on its way toits destination.

virtual local areanetwork

A LAN is divided into several logical LANs to suppress broadcast packets. Each virtualLAN is a broadcast area. Hosts in the same VLAN can directly communicate but hostsin different VLANs cannot. Thus, broadcast packets are restricted in a VLAN.

virtual path identifier 8-bit field in the header of an ATM cell. The VPI, together with the VCI, identifies thenext destination of a cell as it passes through a series of ATM switches on its way to itsdestination.

VLAN See virtual local area network

voice activity detection Voice activity detection or voice activity detector is an algorithm used in speechprocessing wherein, the presence or absence of human speech is detected from the audiosamples. The main uses of VAD are in speech coding and speech recognition. A VADmay not just indicate the presence or absence of speech, but also whether the speech isvoiced or unvoiced, sustained or early, etc.

VPI See virtual path identifier

W

W-CDMA See wideband code division multiple access

WB-AMR See wide band AMR

wide band AMR Full rate of broadband AMR codec algorithm, which is also called G.722.2 algorithm.Generally, it refers to a codec type.

wideband code divisionmultiple access

A radio interface technology used in most of the third-generation (3G) wireless systems.It is the third generation standard developed and supported by GSM proponents.



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