UMG8900_UMTS_ V200R008 Product Description

5/21/2018 UMG8900_UMTS_ V200R008 Product Description

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Product Description

HUAWEI UMG8900V200R008

Issue 04

Date 2009-03-20

HUAWEI TECHNOLOGIES CO., LTD.


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Issue 04 (2009-03-20) Commercial in Confidence Page 2 of 108

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

Notice

The purchased products, services and features are stipulated by the commercial contract made betweenHuawei and the customer. All or partial products, services and features described in this document may notbe within the purchased scope or the usage scope. Unless otherwise agreed by the contract, all

statements, information, and recommendations in this document are provided AS IS without warranties,

guarantees or representations of any kind, either express or implied.

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HUAWEI UMG8900 V200R008

Product Description


About This Document

Author

Prepared by Yang Yanan Date 2008-10-13

Reviewed by Wang Xu/Lu Jiaqing Date 2008-10-13

Approved by Zhang Xiaosong Date 2008-10-13

Summary

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

This document includes:

Chapter Details

1 Overview of the UMG8900 This chapter describes the network position of theUMG8900 in Huaweis GSM/UMTS solution based on

the softswitch architecture and network evolution.

2 Key Benefits This chapter the major features and benefits of the

UMG8900.

3 System Architecture This chapter describes the basic components of the

UMG8900 in the two respects of hardware andsoftware architecture. This chapter also gives typical

configuration examples.

4 Services and Networking

Applications

This chapter details the service functions and

networking applications provided by the UMG8900.

5 Reliability This chapter presents the reliability designs of theUMG8900 in the three respects of system, hardware

and software reliability.

6 OAM System This chapter describes the architecture and

implementation of the operation, administration and

maintenance (OAM) system of the UMG8900.


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Chapter Details

7 Technical Specifications This chapter lists the technical specifications of the

UMG8900.

8 Installation This chapter describes installation procedure and the

expansion and upgrade procedure of the UMG8900.

Appendix A Acronyms and

Abbreviations

This appendix lists the acronyms and abbreviations in

the manual and their full names.

History

Issue Details Date Author Approved by

01 Creation 2008-03-10 Yang Yanan Zhang

Xiaosong

02 Update the description of

consumption2008-05-29 Yang Yanan Zhang

Xiaosong

03 New features are described. 2008-10-13 Yang Yanan Zhang

Xiaosong

04 Update the technical

specifications2009-03-20 Yang Yanan Zhang

Xiaosong


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Contents

1 Overview of the UMG8900 ..................................................................................................... 9

1.1 Current Network Situation ............. ............ .............. ............. .............. ............ ............. .............. .............. ...... 10

1.2 Product Orientation of the UMG8900.... .............. ............. ............ .............. ............. .............. ............ ............ 10

1.3 Network Solutions........ .............. ............ .............. ............. ............ .............. ............. .............. ............ ............ 11

1.4 Network Evolution ............ ............. ............ .............. ............. .............. ............ ............. .............. ............. ....... 15

2 Key Benefits............................................................................................................................ 17

2.1 Hardware Features .........................................................................................................................................18

2.1.1 Packet and TDM Switch Integrated Platform ............ ............. .............. ............. ............ .............. ......... 182.1.2 Series of Hardware Platforms .............. ............. .............. ............ .............. ............. ............ .............. ..... 18

2.1.3 Powerful Cascading Functions.......... .............. ............. .............. ............ ............. .............. ............. ....... 22

2.1.4 Diversified Interfaces............. .............. ............. .............. ............ .............. ............. ............ .............. ..... 28

2.1.5 High Clock Precision ............ ............ .............. ............. .............. ............ ............. .............. ............. ....... 34

2.2 Service Features ............................................................................................................................................. 35

2.2.1 Powerful Service Processing Ability............... ............. .............. ............ ............. .............. .............. ...... 35

2.2.2 Networking Flexibility........... .............. ............. .............. ............ .............. ............. ............ .............. ..... 37

2.2.3 Large Capacity and High Density ............ .............. ............. ............ .............. ............. .............. ............ . 37

2.2.4 Smooth Expansion ................................................................................................................................ 37

2.3 Maintenance Features.......... ............ .............. ............. .............. ............ .............. ............. ............ .............. ..... 382.3.1 Easy Installation and Maintenance................ ............. ............. .............. ............. ............ .............. ......... 38

2.3.2 Perfect Security Design......... ............ .............. ............. .............. ............ ............. .............. ............. ....... 39

2.3.3 Carrier-Class Reliability............ .............. ............. ............ .............. ............. ............ .............. .............. .. 40

3 System Architecture............................................................................................................... 41

3.1 Physical Architecture............... ............ .............. .............. ............. ............ .............. ............. .............. ............. 42

3.1.1 Cabinet Appearance ..............................................................................................................................42

3.1.2 Frame Appearance ................................................................................................................................ 44

3.2 Hardware Architecture ................................................................................................................................... 45

3.2.1 Hardware Fundamentals ....................................................................................................................... 45

3.2.2 Cabinet Architecture ............................................................................................................................. 493.2.3 Frame Architecture......... ............ .............. .............. ............. ............ .............. ............. .............. ............ . 52

3.3 Logical Architecture.............. ............. .............. ............. ............ .............. ............. ............ .............. .............. .. 54

3.3.1 Logical Fundamentals............ .............. ............. .............. ............ .............. ............. ............ .............. ..... 54

3.3.2 Gateway Control and Management Module ............ ............ .............. ............. .............. ............ ............ 55

3.3.3 Packet Processing Module ............ .............. ............. ............ .............. ............. .............. ............ ............ 56

3.3.4 TDM Processing Module ............. ............ .............. ............. ............ .............. ............. .............. ............. 56


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3.3.5 Service Resource Module ............ ............ .............. ............. ............ .............. ............. .............. ............ . 57

3.3.6 Signaling Adaptation Module .............. ............. .............. ............ .............. ............. ............ .............. ..... 57

3.3.7 Cascading Module ................................................................................................................................ 57

3.4 Software Architecture.......... ............ .............. ............. .............. ............ .............. ............. ............ .............. ..... 58

3.4.1 Software Fundamentals......... ............ .............. ............. .............. ............ ............. .............. ............. ....... 58

3.4.2 Host Software............. ............ .............. ............. .............. ............ .............. ............. ............ .............. ..... 58

3.4.3 Client Software ..................................................................................................................................... 60

4 Services and Networking Applications .............................................................................. 61

4.1 Services .......................................................................................................................................................... 62

4.1.1 Basic Bearer Services............. .............. ............. .............. ............ .............. ............. ............ .............. ..... 62

4.1.2 Intelligent Services............ ............ .............. ............. ............ .............. ............. .............. ............ ............ 62

4.1.3 Multimedia Services .............................................................................................................................62

4.1.4 PMR Services............... ............. .............. ............. ............ .............. ............. .............. ............ .............. .. 62

4.2 Functions............. .............. ............. ............ .............. ............. .............. ............ ............. .............. .............. ...... 62

4.2.1 QoS Insurance... ............. ............ .............. .............. ............. ............ .............. ............. .............. ............. 624.2.2 Mobility Support............ ............ .............. .............. ............. ............ .............. ............. .............. ............. 63

4.2.3 Embedded SG ....................................................................................................................................... 63

4.2.4 Audio Mixing............. ............ .............. ............. .............. ............ .............. ............. ............ .............. ..... 63

4.2.5 Virtual Media Gateway ............. .............. ............. ............ .............. ............. ............ .............. .............. .. 63

4.2.6 LICENSE.............................................................................................................................................. 64

4.2.7 TrFO/TFO............................................................................................................................................. 64

4.2.8 IPoE1 .................................................................................................................................................... 64

4.2.9 Iu Flex................................................................................................................................................... 65

4.2.10 Iu PS Service Transfer................. .............. ............. ............ .............. ............. .............. ............ ............ 65

4.3 Network Applications.......... ............ .............. ............. .............. ............ .............. ............. ............ .............. ..... 654.3.1 GSM Networking............... .............. ............. ............. ............. .............. ............. ............ .............. ......... 65

4.3.2 UMTS R99 Networking.... ............ .............. ............. ............ .............. ............. .............. ............ ............ 67

4.3.3 UMTS R4 Networking...... ............ .............. ............. ............ .............. ............. .............. ............ ............ 67

4.3.4 IMS Networking ................................................................................................................................... 69

4.4 Networking Examples ............. ............ .............. ............. .............. ............ .............. ............. .............. ............. 69

4.4.1 GSM Level-1 Tandem VoIP Networking of Operator C ............ ............ ............. .............. ............. ....... 69

4.4.2 GSM Local Exchange Networking of Operator W ............. ............ .............. ............. .............. ............. 70

5 Reliability................................................................................................................................ 73

5.1 System Reliability ............. ............. ............ .............. ............. .............. ............ ............. .............. ............. ....... 74

5.1.1 System Protection Measures ............ ............. ............. ............. .............. ............. ............ .............. ......... 745.1.2 Error Tolerance Consideration .......... .............. ............. .............. ............ ............. .............. ............. ....... 75

5.2 Hardware Reliability ...................................................................................................................................... 76

5.2.1 General Hardware Design............ ............ .............. ............. ............ .............. ............. .............. ............ . 76

5.2.2 Backup Reliability Design ............ .............. ............. ............ .............. ............. .............. ............ ............ 76

5.2.3 Hardware Maintainability Design ............ .............. ............. ............ .............. ............. .............. ............ . 77

5.3 Software Reliability ....................................................................................................................................... 77


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5.3.1 Software Engineering............ ............ .............. ............. .............. ............ ............. .............. ............. ....... 77

5.3.2 Upgrade Without Service Interruption ............ ............. .............. ............ ............. .............. ............. ....... 78

5.3.3 Error Tolerance Design ............. .............. ............. ............ .............. ............. ............ .............. .............. .. 78

5.3.4 Fault Monitoring and Handling......... .............. ............. .............. ............ ............. .............. ............. ....... 78

6 OAM System........................................................................................................................... 816.1 System Architecture ....................................................................................................................................... 82

6.1.1 LMT...................................................................................................................................................... 82

6.1.2 iManager M2000 System............. ............ .............. ............. ............ .............. ............. .............. ............. 84

6.1.3 MML Command Line ............ .............. ............. .............. ............ .............. ............. ............ .............. ..... 84

6.2 OAM Functions............. ............. ............ .............. ............. ............ .............. ............. .............. ............ ............ 85

6.2.1 Device Management .............................................................................................................................85

6.2.2 Data Management ............. ............ .............. ............. ............ .............. ............. .............. ............ ............ 85

6.2.3 Alarm Management........... ............ .............. ............. ............ .............. ............. .............. ............ ............ 85

6.2.4 Tracing Management................. .............. ............. ............ .............. ............. .............. ............ .............. .. 85

6.2.5 Performance Management ............ .............. ............. ............ .............. ............. .............. ............ ............ 866.2.6 Environment and Power Supply Monitoring ............. ............. .............. ............. ............ .............. ......... 86

7 Technical Specifications........................................................................................................ 87

7.1 System Performance Specifications .............. ............. .............. ............ .............. ............. ............ .............. ..... 88

7.1.1 Service Processing Ability ............ .............. ............. ............ .............. ............. .............. ............ ............ 88

7.1.2 Platform Switching Ability ................................................................................................................... 88

7.1.3 Clock Specifications ............................................................................................................................. 88

7.1.4 Voice Quality Specifications ............ ............. ............. ............. .............. ............. ............ .............. ......... 88

7.1.5 Reliability........ ............. ............. .............. ............. ............ .............. ............. .............. ............ .............. .. 88

7.2 Technical Parameters of the Whole UMG8900.............. .............. ............ .............. ............. .............. ............ . 88

7.2.1 Power Supply and Consumption.............. ............. .............. ............ .............. ............. .............. ............. 88

7.2.2 Mechanical Specifications ............ .............. ............. ............ .............. ............. .............. ............ ............ 88

7.2.3 Safety Specifications......... ............ .............. ............. ............ .............. ............. .............. ............ ............ 88

7.2.4 EMC......................................................................................................................................................88

7.3 Environmental Specifications.............. .............. ............. .............. ............ .............. ............. .............. ............. 88

7.3.1 Running Conditions ..............................................................................................................................88

7.3.2 Storage Conditions ............. .............. ............. ............. ............. .............. ............. ............ .............. ......... 88

7.3.3 Transportation Conditions.. .............. ............. ............. ............. .............. ............. ............ .............. ......... 88

8 Installation .............................................................................................................................. 88

8.1 System Installation ............ ............. ............ .............. ............. .............. ............ ............. .............. ............. ....... 88

8.2 System Expansion and Upgrade..... ............ .............. ............. .............. ............ ............. .............. ............. ....... 88

A Acronyms and Abbreviations.............................................................................................. 88


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Product Description


1 Overview of the UMG8900About This Chapter

This chapter first describes the current situation and development of the mobile network.

Then it gives the orientation of the UMG8900 in the network. In addition, it presents thesolutions of Huawei Technologies Co., Ltd. (hereinafter referred to as Huawei) based on

different phases of network evolution.

This chapter describes the network positions and applications of the UMG8900 in Huawei

solutions for the mobile network at different phases of network evolution.

The following table lists the contents of this chapter.

Title Description

1.1 Current Network Situation Describes the current situation of the mobile networks

1.2 Product Orientation of theUMG8900

Describes the product orientation of the UMG8900

1.3 Network Solutions Describes the network solutions

1.4 Network Evolution Describes the UMTS network evolution


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1.1 Current Network Situation

The current global system for mobile communications (GSM) network adopts the traditional

transmission technology of Time division multiplexing (TDM). Network elements connectwith each other in the star topology and network elements with different functions connect

with each other in the hierarchical topology. The network topology is complex.

In addition, because TDM transmission devices are relatively complex, the cost for network

construction and maintenance is high.

The development of the IP network makes it an inevitable choice for network evolution to

provide integrated voice, data and video services based on the IP packet technology.

During the evolution from the GSM network to the network of universal mobile

telecommunications system (UMTS), the packet transmission technology will be introducedgradually. The final aim is to evolve to the all-IP network.

The current GSM network must introduce the packet transmission technology based on IP

during such evolution processes as network expansion, upgrade and device replacement. Onone hand, it meets the trend of network evolution. On the other hand, because the IP network

technology is simple and universal, it can reduce the cost for network construction andoperation effectively.

The UMG8900 is designed based on the softswitch architecture. The UMG8900 networks

with Huawei MSC server under the separated architecture. This networking completely

supports various narrowband voice and data services of the current GSM network. In addition,the IP packet transmission technology is introduced to meet smooth evolution from the TDM

to IP packet network.

1.2 Product Orientation of the UMG8900The UMG8900 converts service bearers, enables interworking between bearers and processes

service stream formats. The UMG8900 is a core network device in Huawei GSM solutions. Itcan help operators to build a communication network that is low cost, profitable and

future-oriented.

The UMG8900 has powerful networking functions and provides abundant services. It can

serve as various functional entities to meet the networking requirements of operators.

The UMG8900 is oriented as:

Service bearer device in a local exchange in the GSM network

Service bearer device in a tandem/toll exchange in the GSM network

Service bearer device in a gateway exchange in the GSM network Visited mobile switching center (VMSC), tandem mobile switching center (TMSC) or

gateway mobile switching center (GMSC) together with Huawei MSC server in theGSM network, supporting the integration of these functions

VMSC, TMSC, or GMSC together with Huawei MSC server in the UMTS R99 network,

supporting the integration of these functions

Media gateway (MGW) in the UMTS R4 core network


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IP multimedia-MGW (IM-MGW) in the UMTS R5 and subsequent IP multimedia

subsystem (IMS) network

In the FMC networking applications, the UMG8900 can provide functions of all the

preceding functional entities, as well as acting as any of them. In addition, the UMG8900

supports UMTS, CDMA, and NGN networking and can be applied in convergence ofUMTS, CDMA, and NGN networks.

The UMG8900 can network with the MSC server of Huawei to support various basic,

supplementary, and value-added services in the traditional GSM network. In addition, as theUMG8900 is based on the separated architecture, it is easy and quick to introduce newservices.

1.3 Network Solutions

Based on the requirements and network characteristics of different operators, Huawei

provides maintainable, operable and manageable customized network solutions. The solutionslay a foundation for network operators to obtain more profits.

Huawei GSM network solution based on the softswitch architecture is shown in Figure 1-1.

Figure 1-1Huawei GSM network solution based on the softswitch architecture

OtherNetwork

OtherNetwork

PSTN/GSM/WCDMA

BTS

BTS

BTS

BTS

BSC

BSC

MSC Server(MSOFTX3000)

MGW(UMG8900)

BSC

BTS

BTS: base transceiver station BSC: base station controller MGW: media gateway

MSC server: mobile switching

center server

WCDMA: wideband code

division multiple access

GSM: global system for mobile

communications

PSTN: public switched telephone network

In the GSM network, the mobile switching center (MSC) in the core network can be dividedinto the VMSC, TMSC and GMSC based on different network positions. Thus, it can realize

the hierarchy of the network.

The UMG8900 can network with the MSC server to serve as a VMSC/TMSC/GMSC in the

GSM network.


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Because the UMG8900 is based on the standard softswitch architecture, one UMG8900 can

network with one MSC server. At the same time, multiple UMG8900s can accept the

management and control of one MSC server to build a big local network.

The UMG8900 and MSC server can be placed in one equipment room. They can also be

placed in different equipment rooms and connect with each other through the IP bearer

network. The UMG8900 is placed near the access network to build a big local network. Thus,it can reduce switching paths of user data and improve service quality effectively.

The centralized network management system iManager M2000 of Huawei can implement the

centralized management and maintenance on all the network elements in the network.

Huawei solution based on the UMTS R4 is shown in Figure 1-2.

Figure 1-2Networking of Huawei UMTS R4 solution

HLR(HLR9820)


MGW

(UMG8900)

SGSN(SGSN9810) GGSN(GGSN9811)


MGW

(UMG8900)

RAN CN

PS

CS

Other

networks

RNC

(BSC6800)

RNC(BSC6800)

NodeB

NodeB

NodeB

NodeB

PSTN/GSM/

WCDMA

INTERNET

GGSN: gateway GPRS support

node

HLR: home location register MGW: media gateway

MSC Server: mobile switching

center server

CN: core network CS: circuit switched domain

SGSN: serving GPRS support

node

PS: packet switched domain PSTN: public switched telephone

network

UTRAN: UMTS terrestrial

radio access network

RAN: radio access network RNC: radio network controller

WCDMA: wideband code

division multiple access


communication

The UMTS network is divided into the core network (CN) and the radio access network

(RAN). The RAN processes all the radio-related functions. The CN processes all the voicecalls and data connections within the UMTS and implements the switching and routingfunctions with external networks. The CN is logically divided into the circuit switched (CS)

and packet switched (PS) domains.

The UMG8900 networks as a MGW in the CN-CS domain. The UMG8900 realizes the bearer

interworking on the service plane and provides service resources.


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Product Description


The IMS networking solution of Huawei for the all-IP network is shown in Figure 1-3.

Figure 1-3IMS networking solution

HLR(HLR9820)

MSC Server

(MSOFTX3000)

MSC Server

(MSOFTX3000)

UMTS-IMSUMTS-CS

RNC(BSC6800)

NodeB

CSCF/BGCF/AS

HSS

MGCF

SGSN GGSN

MGW(UMG8900)

MGW(UMG8900)

IM-MGW

(UMG8900)

PSTN/PLMN/CDMA

In Huawei IMS solution, the UMG8900 works as an IM-MGW to cooperate with the mediagateway control function (MGCF) entity in the IMS. Thus, the UMG8900 can interwork with

the existing public switched telephone network (PSTN) and public land mobile network(PLMN) as well as other networks on the service plane.


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Huawei network convergence solution based on the softswitch architecture is shown in Figure

1-4.

Figure 1-4Huawei network convergence solution based on softswtich separate architecture

AG

NGNISDNPOTS

ISDN

IADV5ANSIP

E-Phone

00

SG

MOBILECORE

MGW

HLRMSC

server

BSC/

RNCBTS/

NodeB

BTS/

NodeB

PSTNLE

UMG8900

BSC/

RNC

BTS/

NodeB

BTS/NodeB

MSC

server

BTS: base transceiver station BSC: base station controller MGW: media gatewayMSC server: mobile switching

center server

RNC: radio network controller HLR: home location register


communications

UMTS: universal mobile

telecommunication system

PSTN: public switched telephone

network

TG: trunk gateway AG: access gateway SG: signaling gateway

ISDN: integrated services digital

network

POTS: plain old telephone

service

V5AN: V5 access network

IAD: integrated access device LE: local exchange SIP: Session Initiation Protocol

When serving as the FMC MGW, the UMG8900 can enable the UMTS, CDMA, and NGN

networks to share resources of one physical MGW. The UMG8900 can provide multiple

applications, complete bearer interworking on the service plane, and provide various servicebearer resources and abundant user access functions.

Under the softswitch separate architecture, the UMG8900 is controlled by the MSC server.

For the UMG8900, a physical MGW can be logically divided into multiple VMGWs thatprovide independent functions and be managed by different softswitches. For example, after a

UMG8900 is divided into two VMGWs, they are controlled by the fixed softswitch and the

mobile softswitch separately so that the FMC application is implemented.

No VMGW need be divided on the UMG8900 if:


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The softswitch supports both fixed and mobile services.

The UMG8900 networks with Huawei softswitch for internal FMC application such asaccess/trunk gateway (ATG) convergence and mobile local exchange/tandem

exchange/gateway exchange convergence.

In addition to application shown in Figure 1-4, the applications of the UMG8900 as an FMC

MGW include but not limited to:

AG to access broadband and narrowband services

TG to connect the PSTN and the NGN and convert service stream formats and bearermodes from the PSTN to the IP network

Mobile local exchange to connect the mobile access network

Mobile tandem exchange to implement tandem between exchanges

Mobile gateway exchange to exchange services with external networks

IP interworking gateway to implement user service interworking between IP networks

Moreover, the UMG8900 can serve as the IM-MGW in the IMS network, to provide abundant

MGW functions, serve multiple networking modes, and flexibly and dynamically dispatch

various service resources based on service development.

1.4 Network Evolution

The evolution process of the GSM network is GSMgeneral packet radio service system

(GPRS)UMTS R99 UMTS R4 UMTS R5 UMTS R6, and finally to an all-IPpacket network where the core networks of the mobile and fixed networks are integrated to

achieve integrated service access.

The typical characteristics at each phase are shown in Table 1-1.

Table 1-1GSM network evolution

Phase Characteristics

GSM The air interfaces adopt the frequency division multiple access (FDMA) and time

division multiple access (TDMA) modes. All the transport networks adopt theTDM mode and comply with GSM series of specifications. The core network

adopts the hierarchical architecture. The network connections are complex andthe end-to-end delay is very low.

GPRS Two physical entities, namely, gateway GPRS support node (GGSN) and servingGPRS support node (SGSN), are overlaid on the current GSM network. The air

interfaces in the access network have no change. Packet service processing

interfaces are added to base station controllers (BSCs).

UMTSR99 The air interfaces adopt the CDMA mode. The transmission between accessnetworks and between access networks and the core network is based on theasynchronous transfer mode (ATM). The architecture of the core network has no

change. The UMTS R99 network complies with relevant 3GPP R99 standards.

The core network is divided into the CS and PS domains. The CS domain

provides voice and narrowband data services. The PS domain provides

high-speed packet services. The CS domain is based on the TDM mode, which is

the same as that in the GSM network.


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Phase Characteristics

UMTS

R4

The access network is the same as that in the R99. The softswitch architecture is

introduced to the CS domain of the core network. The original MSC breaks up

into two entities, the MSC Server and MGW. The core network supportsTDM/ATM/IP connections. The network evolves toward a flattened architecture

and the networking is more flexible.

The PS domain of the core network is the same as that in the R99.

UMTS

R5

Based on the R4, the IMS domain is introduced. The UMTS R5 network achieves

the integrated access of voice, data and video services and provides IP

multimedia services.

The R4 CS domain is retained to provide voice and narrowband data services.

UMTS

R6

The IMS domain is enhanced to achieve the interworking with current different

networks and the interworking between different IMS domains.

At different phases of network evolution, the UMG8900 applications are shown in Figure 1-5.

Figure 1-5UMG8900 applications during the GSM network evolution

MSOFTX3000

UMG8900

MSOFTX3000

UMG8900

UMG8900 UMG8900

MSOFTX3000 MSOFTX3000

GSM UMTS R99 UMTS R4 UMTS R5/R6

VMSC/TMSC/GMSC VMSC/TMSC/GMSC

MSC Server

MGW

MSC Server/MGCF

MGW/IM-MGW

The UMG8900 is based on the standard separated architecture. It can cooperate with the

softswitch to meet core switching applications at different network phases.

In actual networking, you can add related hardware boards and upgrade software so that the

UMG8900 can support smooth expansion and evolution.


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Product Description


2 Key BenefitsAbout This Chapter

This chapter describes the features of the UMG8900 in terms of product design, system

architecture, and operation and maintenance. Through the chapter, you can learn generalfeatures of the UMG8900.


Title Description

2.1 Hardware Features Describes hardware platforms of the SSM-256 frames and

the SSM-32 frames of the UMG8900

2.2 Service Features Describes services, networking modes, and capacities of

the UMG8900

2.3 Maintenance Features Describes maintenance and operation, security design,and reliability of the UMG8900


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Product Description


2.1 Hardware Features

2.1.1 Packet and TDM Switch Integrated PlatformThe UMG8900 hardware platform is designed to support both TDM circuit switching services

and IP packet switching services.

The packet and TDM switch-integrated platform addresses the requirements for the TDM

network and packet network as well. Therefore, the present networks can evolve to all-IPnetworks smoothly through software upgrade instead of hardware replacement so as to protect

investment.

2.1.2 Series of Hardware Platforms

The UMG8900 supports two types of frames, the SSM-256 frames and the SSM-32 frames.

Each type of frames can self-cascade with frames of the same type or cascade with frames of

the other type. Different cascading modes enable the optimum configuration of 16 to 7168E1/T1 channels in the synchronous digital hierarchy (SDH), E1 and T1 transmission modes to

protect investment effectively.

The UMG8900 supports series of hardware platforms, as listed in Table 2-1.

Table 2-1Series of hardware platforms

Name Function Remarks

SSM-256 It provides 256 K

TDM switching

capacity.

The SSM-256

self-cascading modesupports up to 1792

E1s/T1s or 112 xSTM-1.

The SSM-256 and

SSM-32 mixed

cascading modesupports up to 7168

E1s/T1s.

It supports large-capacity networking applications

and multi-frame cascading. In the case of SSM-256

frames only, the UMG8900 supports up to nine

frames. This mode mainly applies to the networking

where a large number of SDH interfaces are used.In the case of mixed cascading between SSM-256

and SSM-32 frames, the UMG8900 supports up to 29frames. This mode mainly applies to the networking

where a large number of E1/T1 interfaces are used.

SSM-32 It provides 32 K

TDM switching

capacity.

The SSM-32self-cascading mode

supports up to 768E1s/T1s.

It supports medium-capacity networking applications

and multi-frame cascading. In the case of SSM-32

frames only, the UMG8900 supports up to three

frames. This mode mainly applies to the networkingwhere a large number of E1/T1 interfaces are used

but there are no more than 768 E1s/T1s.

In the case of mixed cascading between SSM-32

frames and SSM-256 frames, the UMG8900 supports

up to 29 frames.


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Product Description


The SSM-32 frame equipped with the UG02TNC can provide the 96-K TDM switching capability.

The boards and interfaces supported by the UMG8900 are shown in Table 2-2.

Table 2-2Major boards and interfaces

LogicalBoards

PhysicalBoards

Board Full Names External Interfaces

SSM-256/SSM-32 common boards

MCMB Back connection management

unitNoneCMU

MCMF Front connection management

unitNone

MPPB Back Protocol Processing unit FE

MCMB Back connection management

unitNone

PPU

MCMF Front connection management

unitNone

SPF MSPF Front signaling processing unit None

CLK MCLK Clock board Clock input/output

interface

ME32 32E1 TDM interface board E1E32

MESU 32E1 TDM interface unit with

signaling processingE1

MT32 32T1 TDM interface board T1T32

MTSU 32T1 TDM interface unit withsignaling processing

T1

PIE MPIE PDH Electrical Interface Unit E3/T3

MRPU RTP Processing Unit None

MHRU High-speed Routing Unit None

MIOE Mobile network IPoverE1 Unit None

HRB

MHRD High-speed Routing Unit D

It provides the GE

interface through thesubboard.

MTCD TransCode Unit D NoneVPU

MVPD Voice Processing Unit D None


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Product Description


LogicalBoards

PhysicalBoards


MVGU Media gateway Video Gateway

audio/video processing UnitNone

MVGD Media gateway Video Gatewayaudio/video processing Unit D

None

ECU MECU

(UG02ECU)

Echo Canceller Unit None

MS2E

(UG02S2E)

2*155M SDH electrical interface

boardSDHS2L

MS2L

(UG02S2L)

2*155M SDH optical interface

boardSDH

E1G MG1O GE Ethernet interface board GE

E8T ME8T 8*FE Ethernet interface board FE

LPB MLPB Lightning Protected Board E1

SSM-256 dedicated boards

MPU MMPU Main processing unit None

OMU MOMU Operation maintenance unit Console interface

NET MNET Packet switching unit 2*GE, 4*FE, clock

interface

The UG02NET supports

extended FE interfaces.

MTNU TDM switching Net Unit 3*TDM

TCLU TDM Convergence & Link Unit 3*TDM

TNU

MTNB TDM switching Net Unit B 4*TDM

MS2E

(UG01S2E)

2*155M SDH electrical interface

boardS2L

MS2L

(UG01S2L)

2*155M SDH optical interface

board

155M SDH

MTCB TransCode Unit B NoneVPU

MVPB Voice Processing Unit B None

ECU MECU

(UG01ECU)

Echo Canceller Unit None


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Product Description


LogicalBoards

PhysicalBoards


BLU MBLU Back cascading board Cascading interface

It includes three types of

boards: UG01BLU,UG02BLUa and

UG02BLUc. TheUG01BLU and

UG02BLUa support one

FE, and the UG02BLUcsupports extended FE.

FLU MFLU Front cascading board None

SSM-32 dedicated boards

TNU MTNC TDM Switch Unit C 3*8K TDM, 4*FE

The TNC falls into

UG01TNC andUG02TNC. The

UG02TNC supports4/2/1*8K TDM and 4*FE

interfaces.

OMU MOMB Operation & Maintenance Unit B Console

The OMB falls into

UG01OMB and

UG02OMB. TheUG02OMB is equipped

with the SCMU subboard,to provide the resource

management function.

MPU MMPB Main Processing unit B None

The MPB falls intoUG01MPB and

UG02MPB. TheUG02MPB is equipped

with the SCMU subboard,

to provide the resourcemanagement function.

NLU MNLU Net Link Unit 2*GE

MS1L 1*155M SDH optical interface

boardS1L

MS1E 1*155M SDH electrical interface

board

155M SDH


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Product Description


The configuration of each type of boards of the UMG8900 must comply with the board matchinglimitation. Otherwise, services cannot run normally.

2.1.3 Powerful Cascading Functions

The SSM-256 frames and SSM-32 frames of the UMG8900 support the multi-frame

cascading function. The two hardware platforms can cascade independently or with each other,

as described below respectively.

SSM-256 Self-Cascading

The SSM-256 and SSM-32 frames of the UMG8900 support multi-frame cascading, either

self-cascading or mixed cascading. The following describes these two kinds of cascading

respectively.

In the SSM-256 self-cascading mode, the UMG8900 supports up to nine frames. The

SSM-256 frame supports two types of cascading boards as follows:

TNU (MTNU/TCLU), FLU (UG01FLU), and BLU (UG01BLU)This type of boards supports 3 x 8 K TDM cascading between frames. The MTNUs are

configured in the main control frame in the single-frame networking or in the central

switching frame (2 frames). The TCLUs are configured in a service frame.

TNU (MTNB), FLU (UG02FLU), and BLU (UG02BLU.A and UG02BLU.C)

This type of boards supports 4 x 8 K TDM cascading between frames. When the MTNBsare used, both types of frames adopt the MTNBs.

The SSM-256 frames can adopt three self-cascading modes, as shown in Table 2-3.

Table 2-3SSM-256 self-cascading modes

Cascading

Mode

Major Board Remarks

Mode 1 The MTNB is

used as the

TDM

switching andcascading

board.

Except the control frame, other frames use the MTNBs to

provide four 8 K TDM cascading channels between

frames.

In this mode, the cascading board uses the BLU/FLU thatprovides four 8 K TDM cascading channels.

Mode 2 The MTNU

and TCLU are

used as theTDM

switching and

cascadingboards.

The central switching frame is configured with the MTNU.

The main control frame and service frames are configured

with the TCLU. The control frame requires noconfiguration of cascading board. There are three 8 K

TDM cascading channels between frames.

In this mode, the cascading board uses the BLU/FLU thatprovides three 8 K TDM cascading channels.


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Product Description


CascadingMode

Major Board Remarks

Mode 3 The MTNU

and MTNB

are used as the

TDMswitching and

cascading

boards.

The central switching frame is configured with the MTNU.

The central switching frame can be configured with the

BLU/FLU that provides four 8 K TDM cascading channelsto cascade with a service frame that is configured with the

MTNB.

The central switching frame can be configured with the

BLU/FLU that provides three 8 K TDM cascading

channels to cascade with a service that is configured with

the TCLU.

Among the above three modes, modes 1 and 2 mainly apply to new offices and mode 3 mainly applies to

the expansion where the MTNB is added based on the original configuration of the MTNU. The three

cascading modes are the same except the cascading boards and the capacities of TDM cascading

channels between frames.

Take the TNU (MTNB) and the BLU/FLU that provides 4 x 8 K TDM cascading channels as

an example. The nine-frame cascading is shown in Figure 2-1.

Figure 2-1SSM-256 multi-frame cascading

2# 3# 4# 6# 7#

0#

1#

8#

4*8 K TDM 1*FE

NE

T

T

N

U

T

N

U

NET

NET

TNU

TNU

BLU

BLU

BLU

BLU

BLU

BLU

BLU

BLU

BLU

BLU

BLU

BLU

N

ET

N

ET

5#

2*GE

NE

T

0#: central switching frame 1#: main control frame

2# to 7#: service frames 8#: control frame


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Product Description


The UMG8900 supports another mode of SSM-256 self cascading, as shown in Figure 2-2.

Figure 2-2SSM-256 self-cascading (mode 2)

2# 3# 4# 6# 7#

1#

0#

8#

4*8 K TDM 1*FE

N

E

T

N

E

T

T

N

U

T

N

U

N

E

T

N

E

T

T

N

U

T

N

U

B

L

U

B

L

U

B

L

U

B

L

U

B

L

U

B

L

U

B

L

U

B

L

U

B

L

U

B

L

U

B

L

U

B

L

U

N

E

T

N

E

T

5#

2*GE

0#: central switching frame 1#: main control frame2# to 7#: service frames 8#: control frame

Mode 2 differs from mode 1 in the main control frame. In mode 1, the main control frame

provides the service and device management functions. In mode 2, the main control frame

provides the device management and cascading functions. That is, in mode 2, cascadingboards are inserted in the main control frame to connect with service frames.

The CLK in the main control frame can be configured in the central switching framenumbered 0. In this case, the central switching frame does not provide the cascading function

and can hold service boards to process services.

In the SSM-256 self-cascading mode, the independent CLK must be configured. Through

clock distribution cables, the CLK provides clock signals for the SSM-256 frame where noCLK is configured.

SSM-32 Self-Cascading

When SSM-32 frames self-cascade independently, the UMG8900 supports up to three frame.


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Product Description


Suppose the UG02TNC is configured in the SSM-32 frame, the cascading is shown in Figure2-3.

Figure 2-3SSM-32 multi-frame cascading

TNC TNC

TNC TNC

TNC TNC

1#

2*8KTDM 1*FE

2#

3#

1*GE

N

L

U

N

L

U

N

L

U

N

L

U

N

L

U

N

L

U

N

L

U

N

L

U

1#: main control frame 2# and 3#: service frames

The cascading mode between frames is 2 x TDM + 1 x FE + 1 x GE. If the UG01TNC isconfigured in the frame, the cascading mode between frames is 1 x TDM + 1 x FE + 1 x GE.

The NLU must be configured to implement GE cascading. The NLU can be configured in

back slot 4/5 or 10/11 only.

SSM-256 and SSM-32 Mixed Cascading

In the case of the SSM-256 and SSM-32 mixed cascading, the central switching frame uses an

SSM-256 frame, and the main control frame and service frames can use SSM-32 or SSM-256frames. If no GE cascading is required, the system supports the cascading mode of 1SSM-256 frame + 28 SSM-32 frames or the cascading mode of 1 SSM-256 frame + n x

SSM-256 frames + (7 n) x 4 x SSM-32 frames. Here, n 7.

In the SSM-256 and SSM-32 mixed cascading mode, the cascading between SSM-256 frames

is the same as the SSM-256 self-cascading. Following is the SSM-256 and SSM-32 mixedcascading when an SSM-256 frame acts as the central switching frame.

If the UG02TNC is configured in the SSM-32 frame, the SSM-256 frame can cascade the

SSM-32 frame in two modes. In one mode, the SSM-256 frame cascade the SSM-32 frame

through the NET and the TNB, as shown in Figure 2-4.


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Product Description


Figure 2-4SSM-256 and SSM-32 mixed cascading (mode 1)

TNC TNC

0#

2*8KTDM 1*FE

2#

1#

1*GE

T

N

U

T

N

U

N

E

T

N

E

T

TNC TNC N

L

U

N

L

U

N

L

U

N

L

U

0#: central switching frame 1#: main control frame 2#: service frame

In mode 1, an SSM-256 frame serves as the central switching frame. In the SSM-256 frame,the physical board of the TNU is the MTNB. In the SSM-32 frame, the physical board of the

TNU is the MTNC.

The cascading mode between the SSM-32 frame and the SSM-256 central switching frame is2 x TDM + 1 x FE + 1 x GE. The TNB provides the TDM cascading channel. The TNC andthe NET provide the FE cascading channel. The NLU and the NET provide the GE cascading

channel. If the UG01TNC is configured in the SSM-32 frame, the cascading mode between

frames is 1 x TDM + 1 x FE + 1 x GE.


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Product Description


The SSM-256 frame can also cascade the SSM-32 frame through the BLU, as shown inFigure 2-5.

Figure 2-5SSM-256 and SSM-32 mixed cascading (mode 2)

0#

2*8KTDM 1*FE

2#

1*GE

TNU

TNU

NET

NET

TNC TNC

1#

TNC TNC

BLU

BLU

NL

U

NL

U

NL

U

NL

U

0#: central switching frame 1#: main control frame 2#: service frame

The physical board of the FLU/BLU is the BLU supporting 4 x 8 K TDM cascading. The

cascading mode between the SSM-32 frame and the SSM-256 central switching frame is 2 x

TDM + 1 x FE + 1 x GE. The BLU in the SSM-256 frame provides the TDM/GE/FEcascading channel. The TNC in the SSM-32 frame provides the TDM/FE cascading channel.

The NLU in the SSM-32 frame provides the GE cascading channel. If the UG01TNC isconfigured in the SSM-32 frame, the cascading mode between frames is 1 x TDM + 1 x FE +

1 x GE.

In the actual networking application, the SSM-256 and SSM-32 mixed cascading mode can

work with the preceding two cascading modes. That is, the central switching frame cascade

with the main control frame through the NET, and cascade with the SSM-32 service framethrough the BLU.

If no GE cascading is required, an SSM-256 frame can cascade 28 SSM-32 frames. In the

case of E1-only networking, the 2 x TDM + 1 x FE + 1 x GE cascading mode is usually

adopted, and an SSM-256 frame can cascade 14 SSM-32 frames. In the case of STM-1-onlynetworking, the 4 x TDM + 1 x FE + 2 x GE cascading mode is usually adopted, and an

SSM-256 frame can cascade 7 SSM-32 frames.


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Product Description


2.1.4 Diversified Interfaces

Interface Types

The interface types supported by the UMG8900 are shown in Table 2-4.

Table 2-4Interface types

Interface Type Number Description

E1/T1 Up to

7168

The interfaces are used to connect with the BSC, PSTN,

MSC and the peer UMG8900s. The E1 and T1 interfaces

use the same boards except that the interface configuration

is different. The E1 and T1 interfaces are electric interfacesand share the hardware.

E3/T3 Up to

336


MSC and the peer UMG8900s. The E3 and T3 interfaces

use the same boards except that the interface configuration

is different. The E3 and T3 interfaces are electric interfacesand share the hardware.

E1/T1 ATM(IMA)

Up to896

The interfaces are used to connect with the RNC.

STM-1 ATM Up to

112The interfaces are used to connect with the RNC.

STM-1 ATM interfaces include multi-mode interfaces and

three types of single-mode optical interfaces. The

transmission distance is 2 km (multi-mode), 15 km(single-mode), 40 km (single-mode) and 80 km

(single-mode) respectively.

STM-1

SDH/OC-3SONET

Up to

112


MSC and the peer UMG8900s.

SDH interfaces include electric interfaces, multi-mode

interfaces and three types of single-mode optical interfaces.The transmission distance is 2 km (multi-mode), 15 km

(single-mode), 40 km (single-mode) and 80 km

(single-mode) respectively.

FE (bearer) Up to

224

The interfaces are used to connect with the peer

UMG8900s.

They are used to bear IP voice services.

FE (control) Up to 14 The interfaces are used to connect with MSC servers.

They are used to exchange H.248 messages.

FE (SIGTRAN) Up to 14 The interfaces are used to connect with MSC servers.

They are used for the signaling adaptation based onSIGTRAN. They work in the 1+1 backup mode.

FE (OMC) 2 The interfaces are used to connect with the LMT and the

network management device. They work in the 1+1 backup

mode.


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Product Description


Interface Type Number Description

GE (bearer) Up to 28 The interfaces are used to connect with the peer

UMG8900s.

GE interfaces include multi-mode interfaces and three

types of single-mode optical interfaces. The transmissiondistance is 0.55 km (multi-mode), 10 km (single-mode), 40

km (single-mode) and 70 km (single-mode) respectively.

8 kHz clock

interfaces4 The interfaces are used to extract line clock signals from

TDM interface boards. They work in the master/slave

mode.

BITS clock

interfaces2 The interfaces include the 2048 kHz interface and 2.048

Mbit/s interface. They are used to extract clock signalsfrom a BITS. They work in the master/slave mode.

GPS/GLONASS

clock interfaces2 The interfaces are used to receive synchronous clock

signals from a satellite synchronous system. They work inthe master/slave mode.

The UMG8900 supports small form factor pluggable (SFP) optical modules for the STM-1SDH/SONET interface. These interfaces can be configured with different optical modules in

different applications.

Interface Specifications

The interfaces provided by the UMG8900 comply with relevant specifications.

The specifications of the E1 interface are shown in Table 2-5.

Table 2-5E1 interface specifications

Item Specifications

Transmission rate 2.048 Mbit/s

Frame format ITU-T G.703

Transport code AMI, HDB3

Channel amount 32

Nominal impedance 75 ohm or 120 ohm, set through the DIP switches

Transmission distance 300 m

Connector type DB100 connector

The specifications of the T1 interface are shown in Table 2-6.


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Product Description


Table 2-6T1 interface specifications

Item Specifications


Frame format ITU-T G.703

Line code type B8ZS, AMI

Channel amount 24

Nominal impedance 100 ohm twisted pair cable, set through the DIP switches


Connector type DB100 connector

The specifications of the E3 interface are shown in Table 2-7.

Table 2-7E3 interface specifications

Item Specifications


Frame format ITU-T G.703, G.747

Transport code HDB3

Channel amount 512 timeslots

Nominal impedance 75 ohm


Connector type BNC connector

The specifications of the T3 interface are shown in Table 2-8.

Table 2-8T3 interface specifications

Item Specifications


Frame format ITU-T G.752, G.747

Line code type B3ZS

Channel amount 672 timeslots



Connector type BNC connector


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Product Description


The specifications of the STM-1 ATM interface are shown in Table 2-9.

Table 2-9STM-1 ATM interface specifications

Item Specifications

Standards G.957, G.691, G.693

Transmission rate 155 Mbit/s

Channel amount 63 x E1, 84 x T1

Transmission distance 2 km (multi-mode), 15 km (single-mode), 40 km

(single-mode) and 80 km (single-mode)

Transmitter type Multi-mode: light emitting diode (LED)

Single-mode: laser diode (LD)

Central wavelength 2 km (1310 nm)

15 km (1310 nm)

40 km (1310 nm)

80 km (1550 nm)

Transmit optical power 2 km (14.0 dBm to 19.0 dBm)

15 km (15.0 dBm to 8.0 dBm)

40 km (0 dBm to 5.0 dBm)


Receiver sensitivity 2 km (30.0 dBm)

15 km (28.0 dBm)

40 km (34.0 dBm)

80 km (34.0 dBm)

Connector type LC optical fiber connector

The specifications of the STM-1 SDH interface are shown in Table 2-10.

Table 2-10STM-1 SDH interface specifications

Item Specifications

Standards Electric interfaces: G.703

Optical interfaces: G.957


Channel amount 63 x E1, 84 x T1

Transmission distance 70 m (electric interfaces), 2 km (multi-mode), 15 km

(single-mode), 40 km (single-mode) and 80 km (single-mode)

Transmitter type Multi-mode: light emitting diode (LED)

Single-mode: laser diode (LD)


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Product Description


Item Specifications


15 km (1310 nm)

40 km (1310 nm)

80 km (1550 nm)


15 km (15.0 dBm to 8.0 dBm)




15 km (28.0 dBm)

40 km (34.0 dBm)

80 km (34.0 dBm)

Connector type Optical interfaces: LC optical fiber connector

Electric interfaces: SMB coaxial cable connector

The specifications of the STM-1/OC-3 SDH interface are shown in Table 2-11.

Table 2-11STM-1/OC-3 SDH interface specifications

Item Specifications

Standards Conforming to STM-1/OC-3 SDH/SONET standards andsupporting IETF RFC1619, RFC1661, RFC1662 and

RFC2615


Transmission distance 2 km (multi-mode), 15 km (single-mode), 40 km


Transmitter type Multi-mode: LED

Single-mode: LD


15 km (1310 nm)

40 km (1310 nm)

80 km (1550 nm)


15 km (15.0 to 8.0 dBm)




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Product Description


Item Specifications


15 km (28.0 dBm)

40 km (34.0 dBm)

80 km (34.0 dBm)

Connector type LC optical fiber connector (SFP)

The specifications of the FE electric interface are shown in Table 2-12.

Table 2-12FE electric interface specifications

Item Specifications

Standards IEEE 802.3u

Transmission rate 10/100 Mbit/s auto-sensing


Frame format 10BASE-T/100BASE-TX

Connector type RJ-45


The specifications of the GE optical interface are shown in Table 2-13.

Table 2-13GE optical interface specifications

Item Specifications

Standards IEEE 802.3 z


Transmission distance 0.55 km (multi-mode), 10 km (single-mode), 40 km


Transmitter type Multi-mode: LED

Single-mode: LD

Transmit optical power 850 nm (9.5 dBm to 0 dBm)

1310 nm (9.5 dBm to 3 dBm)

1550 nm (4.0 dBm to +1 dBm)

1310 nm (+5.0 dBm to 2.0 dBm)

1550 nm (4.0 dBm to +2.0 dBm)


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Product Description


Item Specifications

Receiver sensitivity 850 nm (17 dBm)

1310 nm (20 dBm)

1550 nm (21 dBm)

1310 nm (23.0 dBm)

1550 nm (+2 dBm)

Central wavelength 0.55 km (850 nm)

10 km (1310 nm)

40 km (1550 nm)

40 km (1310 nm)

70 km (1550 nm)

Frame format Ethernet_II

Ethernet_SAP

Ethernet_SNAP

Connector type LC optical fiber connector (SFP)

The specifications of clock interface are shown in Table 2-14.

Table 2-14Clock interface specifications

Item 2.048 MHz 2.048 Mbit/s

Connector type SMB SMB

Signal type G.703.13 G.703.9

Detecting threshold 24 dB 24 dB

Impedance match 75 ohm 75 ohm

Balance mode Unbalanced Unbalanced

Electric isolation 300 V/50 Hz, > 1 minute 300 V/50 Hz, > 1 minute

2.1.5 High Clock Precision

The UMG8900 uses the independent CLK boards or clock subboards to provide clock signals

required by the system. The CLK boards work in the master/slave mode to ensure the reliablerunning of the clock system. The clock subboards are configured on the master and slave

TNU boards, whose physical boards are the MTNC. The clock subboards work in themaster/slave mode too.

The UMG8900 can access 8-kHz line clock, 2048-kHz, 1554-kbit/s or 2048-kbit/s buildingintegrated timing supply system (BITS) clock, 64-kHz external clock and global positioning

system (GPS)/global navigation satellite system (GLONASS) clock. The UMG8900 allowsyou to set the priorities of clocks. Thus, the UMG8900 can select the clock of the highest

priority through the synchronization status message (SSM) of clock.


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Product Description


The UMG8900 supports stratum-2 A and stratum-3 clocks. When the clock subboards areused, the UMG8900 supports stratum-3 clock only. Thus, the UMG8900 can meet clock

requirements in different networking applications.

2.2 Service Features

2.2.1 Powerful Service Processing Ability

The UMG8900 acts as a bearer device for voice and narrowband data services in the mobile

core network. It transmits service streams and converts formats of service streams within themobile network and between the mobile and fixed networks. For two networks that fully

adopt the IP transmission technology, service interworking between the IP networks can be

realized by means of domains.

The UMG8900 provides the service bearer processing function and service stream format

conversion function. By networking with the MSC server, the UMG8900 provides basic,supplementary and intelligent network (IN) services.

The UMG8900 supports the following service functions:

G.711A/G.711/G.723.1/G.726/G.729/adaptive multirate (AMR)/AMR2/WB-AMR voicecodecs, full rate (FR)/half rate (HR)/enhanced full rate (EFR) voice codecs in the GSM

network, and G.711A/G.711/G.723.1/G.726/G.729/WB-AMR voice codecs based on IP

transmission

H.263/MPEG-4 video codec, H.245 video call control and H.223 video service

multiplexing in VIG applications

T.38 fax and fax over G.711 in VMSC

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), voice quality enhancement (VQE), and packet

loss concealment (PLC) Detection and generation of dual tone multi-frequency (DTMF) signals, and RFC2833

detection

Various quality of service (QoS) assurance methods such as the setting of voice and data

service priorities, dynamic jitter buffer (JB), IP type of service (ToS), differentiated

service code point (DSCP), 802.1P/Q and virtual local area network (VLAN) priority

Announcement playing, digit collecting and sending, dynamic loading of tone files,intelligent announcement playing in different countries and areas with different tone files

loaded, and working with the NMS for centralized management of tone files

Inter-working function (IWF) through an attached shared IWF (SIWF), including fax,synchronous data bearer, asynchronous data bearer

Embedded signaling gateway (SG) function, through which the UMG8900 can adapt and

forward the signaling of the access network or PSTN to the signaling of the packet corenetwork based on Message Transfer Part layer 2 (MTP2) User Adaptation(M2UA)/Message Transfer Part layer 3 (MTP3) User Adaptation (M3UA)/Integrated

Services Digital Network (ISDN) Q.921-User Adaptation layer (IUA) to reduce thecomplexity of networking

Adaptation and termination of R2 channel associated signaling (CAS)

Integrated video and voice services, flexible and expandable software and hardware

architectures, and expanded services through software upgrade


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Dual-homing function, which enables the UMG8900 to switch to the slave MSC serverautomatically without interrupting services when the master MSC server fails

Digital private mobile radio (PMR) services and flexible digital PMR networking by

networking with the GTSOFTX3000 and the GT800

Acting as an IM-MGW to realize service interworking between the IMS and the circuit

switched (CS) domain and support transparent transmission of H.264 and MPEG4 videocodes

IP-based Iu interface

Both the RAN and CN adopt IP packet transmission technology to construct an all-IP

network. Thus, the RAN and CN may share the IP bearer network.

IP-based A interface

Both the BSS and NSS adopt the IP packet transmission technology to construct an all-IPnetwork. Thus, the BSS and NSS may share the IP bearer network.

SCTP multi-homing

Multiple IP addresses in one SCTP association are supported by both ends. Thus, the

end-to-end multi-path transmission mechanism is realized, which is more reliable for the

upper layer subscribers.

Upgrade without service interruption

The upgrade of the UMG8900 does not affect the services.

File transmission from the version server to the BAM of the UMG8900 through Trivial

File Transfer Protocol (TFTP)

Time localization function

You can set the time based on the time zone where the UMG8900 is located, and set thedaylight saving time.

Open Mc interface, and interconnection with the MSC server of the other suppliers

MultiProtocol Label Switching (MPLS)

The fast packet forwarding capability can be improved, and the QoS is guaranteed.

IP over E1 functionThe UMG8900 can adapt the IP data packets into the TDM packets, implement

transparent transmission based on the route, and support the Compressed Real-TimeProtocol (CRTP) function when the type of the IP bearer interface is serial or VT. That is,

the RTP packet is compressed, the bandwidth occupied by the RTP packet is reduced,and the transmission efficiency is improved.

Working with the MSC server to support the H.248.11 overload control protocol and the

H.248.10 congestion control protocol, and supporting the self overload protectionfunction, to completely and stably support the H.248 protocol

IuPS features to connect the RNC and the SGSN

SSH server function to ensure data completeness and reliability and safely implementremote user login and access

Flexible configuration of common codecs

In the actual networking application, the MGW is required to recognize and transparently

transmit certain special codecs only without converting them. The UMG8900 canflexibly configure such common codecs to implement dynamic support.

IP interworking inside the MGW

For interworking between IP terminations inside the MGW, the IP interfaces are looped

through lines. No router or layer 3 switch is required to transmit packets; thus, the cost isreduced.


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Interworking between VMGWs of one MGW

The conversion of TC codecs is not required, and thus substantial TC resources are savedand the cost of network construction is reduced.

RTP multiplexing to reduce transmission bandwidth

2.2.2 Networking FlexibilityThe UMG8900, developed based on the softswitch architecture, is not only compatible withTDM switching networks but also able to push TDM networks to evolve to IP packet

switching networks.

The UMG8900 interacts with the MSC server through the H.248 protocol. They together

serve as a VMSC/TMSC/GMSC of the GSM/UMTS R99 core network. The UMG8900 canindependently work as an MGW in the UMTS R4 network or an IM-MGW in the IMS.

The UMG8900 and MSC server can be installed in different places and connect with eachother in the IP packet mode.

Multiple UMG8900s can be managed by one MSC server. Different UMG8900s

communicate with each other by TDM/IP. The MSC server is placed in a central city for the

sake of easy maintenance. The UMG8900 is placed in an area of dense traffic. Thus, theUMG8900 can access the base station subsystem (BSS) or RAN nearby to reduce roundabout

traffic and improve the QoS. At the same time, the flat network architecture and connectionmode support flexible networking. The UMG8900 can form a big local network or build avirtual dedicated network through user division based on areas on the MSC server.

The UMG8900 supports the integrated gateway exchange function and realizes interworkingamong the NGN, IMS, GSM, UMTS, and CDMA networks.

In addition, the UMG8900 can provide the agent A-Flex/Iu-Flex function to implement MSC

Pool networking. The devices in the access network can interconnect with each MSC Server

in MSC Pool without being upgraded. The MSC Servers in Pool can share resources and load.If an MSC Server fails, another MSC Server in Pool can take over subscribers of the faulty

MSC Server. Thus, network disaster recovery is implemented.

2.2.3 Large Capacity and High Density

A UMG8900 frame adopts the standard 19-inch structure and offers front and back slots inpair. One frame provides 32 slots to increase the capacity of a single frame effectively.

The UMG8900 provides the multi-frame cascading function and supports up to 29 frames.

You can flexibly configure the UMG8900 based on the actual networking and user capacity.

2.2.4 Smooth Expansion

The UMG8900 is designed based on the distributed modular architecture. Different boards

and software modules perform different service functions.

To expand and upgrade the UMG8900, you can add related service boards to existing frames.

If the capacity exceeds the limit of existing frames, you can add frames in the cascading modeto achieve the upgrade. Because the UMG8900 supports a wide range of capacity, it can meet

the requirements of expansion in most applications. The cascading mode enables theUMG8900 to take the form of one network element, which is convenient for maintenance andmanagement.


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To upgrade services of the UMG8900, you can upgrade the software and add new serviceboards required. Thus, the UMG8900 can implement smooth evolution and support current

transmission networks.

2.3 Maintenance Features

2.3.1 Easy Installation and Maintenance

The UMG8900 supports easy installation and flexible maintenance.

The details are shown in Table 2-15.

Table 2-15Easy installation and maintenance

Type Description

Installation The UMG8900 uses the standard 19-inch cabinet, which is convenient for

initial deployment and expansion.Each functional module provides standard external interfaces with clearlabels. As standardized joints are used, there is no requirement for special

tools in equipment mounting.

Boards are inserted in front and back slots on the backplane of a frame.All cables lead out from the rear of a cabinet for the convenience of

equipment installation and cable distribution.

All boards support hot plugging. There are indicators on the front panel of

a board to show the running status of the board and interfaces.


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Type Description

Maintenance The UMG8900 provides various management methods such as the MML

and GUI combined interface and the integrated network management

system iManager. Thus, the UMG8900 enables the local and remotemaintenance functions. The graphic interface offers powerful online help

and easy operation.

The UMG8900 supports online report of hardware and software versions,online software loading and patch installation. This feature enablessoftware upgrade and maintenance without affecting the system running.

The UMG8900 supports version consistency check, version authentication

of front administration module (FAM) and back administration module(BAM) and version roll back.

The UMG8900 provides logs, alarms, traffic statistics and fault diagnosis

functions to facilitate fault prevention, location and troubleshooting.

The UMG8900 provides a series of tools such as Info Collection Tool,Health Check Tool and Log Analyzer, and supports analysis and

maintenance of operating conditions of the device in both the online and

offline modes.

The UMG8900 supports the distributed call history record (CHR)function. Critical information in calls are recorded and processed to

CHRs. The CHRs are saved on the server for value-added applicationssuch as real-time monitor and troubleshooting.

The alarm box can display visual alarm information and notify

maintenance personnel of alarms by phone.

Fans in a frame support the automatic speed adjustment function. The fans

can adjust their speed automatically according to the current temperatureof the device to increase the life span and reduce the power consumption

of the device.

2.3.2 Perfect Security Design

The security management of the UMG8900 includes two aspects: control data, and operation

and maintenance.

Control data security

The 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 log to the hard disk or compact disk.

Operation and maintenance security

The system defines user groups and rights. Different user groups can customize different

command sets. Through the configuration of command groups and users, the system caneffectively implement hierarchical management of operators and operation rights.

During the operation, the system checks data consistency and gives prompt and

confirmation about operations. This avoids possible damage to the system due to

improper operations.

Network and device management can protect your password and make unauthorizedaccess invalid. Service data can be accessed only in certain condition. The system

ensures that only authorized users can obtain correct data.


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Through the access control list (ACL), you can configure the firewall flexibly to filtermessages of ports that do not provide service. Thus, the system can prevent attackers

from finding system holes through the port scanning technique.

The UMG8900 supports the IP Security (IPSec) protocol. The UMG8900 ensures the

security of services by encryption of transmission data.

2.3.3 Carrier-Class Reliability

The UMG8900 ensures system reliability through the following mechanisms and designs:

All main control boards support the 1+1 backup function.

The interfaces support the 1+1 and N:1 backup functions, the automatic protection

switch (APS) interface protection, optical signals through and off protection and so on.

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

The multi-frame cascading mode supports master and slave cascading channels to avoidany single-point fault.

The UMG8900 supports the dual-homing function. When the master MSC server fails,

the UMG8900 switches to the slave MSC server to ensure the normal running of services.


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3 System ArchitectureAbout This Chapter

This chapter describes the system architecture of the UMG8900. In detail, it profiles the

logical interfaces, hardware and software components of the UMG8900. It also introduces

each functional module of the UMG8900.


Title Description

3.1 Physical Architecture Describes the physical architecture of the UMG8900

3.2 Hardware Architecture Describes the hardware architecture of the UMG8900

3.3 Logical Architecture Describes the logical architecture of the UMG8900

3.4 Software Architecture Describes the software architecture of the UMG8900


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3.1 Physical Architecture

3.1.1 Cabinet AppearanceThe UMG8900 is placed in N68-22 or N68E-22 cabinets provided by Huawei.

Figure 3-1 shows the front view of an N68-22 cabinet.

Figure 3-1Front view of an N68-22 cabinet


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Figure 3-2 shows the front view of an N68E-22 cabinet.

Figure 3-2Front view of an N68E-22 cabinet

The N68E-22 cabinet is the enhanced model of the N68-22 cabinet. Its specifications such as

dimensions 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.

An N68-22/N68E-22 cabinet has a 46 U inside space (1 U = 44.45 mm = 1.75 inches). Itcomprises a power distribution frame, three semi-integrated frames, a cabling trough, multiple

filler panels, a rack, multiple guide rails and one or more side hang fiber coilers. I

UMG8900_UMTS_ V200R008 Product Description

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