Huawei Mobile Softswitch Product Description

UMG8900 V200R009

Product Description

Issue 1.0

Date 2013-04-09

HUAWEI TECHNOLOGIES CO., LTD.

HUAWEI UMG8900

Product Description

Issue 1.0 (2013-04-09) Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd.

Page 2 of 67

Copyright Huawei Technologies Co., Ltd. 2010. All rights reserved.

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

prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

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

trademarks and trade names mentioned in this document are the property of their respective

holders.

Notice

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

between Huawei and the customer. All or partial products, services and features described in this

document may not be 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.

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

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

and recommendations in this document do not constitute the warranty of any kind, express or

implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

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Contents

1 Product Positioning ...................................................................................................................... 7

1.1 Introduction to the UMG8900 in the Mobile Softswitch Solution ................................................................... 7

1.2 Positioning of the UMG8900 ........................................................................................................................... 8

1.3 Benefits for Customers ..................................................................................................................................... 9

2 Product Features .......................................................................................................................... 11

3 Product Architectures ................................................................................................................. 19

3.1 Hardware Architecture ................................................................................................................................... 19

3.2 Software Architecture ..................................................................................................................................... 45

4 Application Scenarios ................................................................................................................ 46

4.1 GSM Networking ........................................................................................................................................... 46

4.2 UMTS R99 Networking ................................................................................................................................. 48

4.3 UMTS R4 Networking ................................................................................................................................... 48

4.4 IMS Networking ............................................................................................................................................. 49

5 Technical Specification .............................................................................................................. 50

5.1 System Performance ....................................................................................................................................... 50

5.2 Technical Parameters of the Whole UMG8900 .............................................................................................. 55

5.3 Environmental Specifications......................................................................................................................... 56

6 Acronyms and Abbreviations ................................................................................................... 64

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Figures

Figure 1-1 Networking for Huawei mobile softswitch solution ............................................................................ 8

Figure 3-1 Front view of an N68E-22 cabinet ..................................................................................................... 20

Figure 3-2 Front view of an SSM-160 frame ...................................................................................................... 21

Figure 3-3 Hardware components (SSM-160 frames) ......................................................................................... 22

Figure 3-4 Structure of the UMG8900 assembly cabinet (V200R009; six 48 VDC inputs). ............................ 23

Figure 3-5 Board deployment in an SSM-160 frame .......................................................................................... 24

Figure 3-6 Logical components of the SSM-160 hardware ................................................................................. 25

Figure 3-7 Software architecture of the UMG8900 ............................................................................................. 45

Figure 4-1 GSM networking ............................................................................................................................... 47

Figure 4-2 UMTS R99 networking ..................................................................................................................... 48

Figure 4-3 UMTS R4 application ........................................................................................................................ 49

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Tables

Table 2-1 Interface types ..................................................................................................................................... 11

Table 3-1 Equipment and resource management units ........................................................................................ 27

Table 3-2 Service and protocol processing units ................................................................................................. 31

Table 3-3 Switching and cascading units ............................................................................................................. 34

Table 3-4 Interface units ...................................................................................................................................... 37

Table 3-5 Media resource processing units .......................................................................................................... 42

Table 3-6 Clock units ........................................................................................................................................... 44

Table 3-7 Lightning protection units ................................................................................................................... 45

Table 5-1 Service processing capability of a GSM/UMTS local exchange ......................................................... 50

Table 5-2 Service processing capabilities of a GSM/UMTS gateway exchange or tandem exchange ................ 51

Table 5-3 Service processing capability (signaling transfer) ............................................................................... 52

Table 5-4 Hardware platform switching capability.............................................................................................. 52

Table 5-5 Clock specifications ............................................................................................................................. 53

Table 5-6 Voice quality specifications ................................................................................................................. 54

Table 5-7 Reliability specifications ..................................................................................................................... 54

Table 5-8 Power supply and consumption of the SSM ........................................................................................ 55

Table 5-9 Mechanical specifications of the UMG8900 ....................................................................................... 55

Table 5-10 Climatic conditions ............................................................................................................................ 57

Table 5-11 Density of mechanical active substances ........................................................................................... 57

Table 5-12 Density of chemical active substances............................................................................................... 58

Table 5-13 Mechanical stress ............................................................................................................................... 58




Table 5-17 Mechanical stress ............................................................................................................................... 61


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HUAWEI UMG8900

Product Description



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1 Product Positioning 1.1 Introduction to the UMG8900 in the Mobile Softswitch Solution

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

with the mobile switching center (MSC) server of Huawei to support various narrowband

voice and data services of the existing global system for mobile communications (GSM)

network. In addition, the IP packet transmission technology is introduced to ensure smooth

evolution from the time division multiplexing (TDM) network to the IP packet network.

At present, the softswitch technology is mainly used in the core network (CN). The mobile

softswitch supports the distributed networking and IP bearer, which improves the bearer

transmission efficiency and reduces the operational expenditure (OPEX). The mobile

softswitch also supports smooth network evolution to reduce the investment risks of carriers.

To cater to different networking requirements and network characteristics, Huawei provides

the 2G/3G integrated softswitch solution. This solution provides maintainability, operability,

and easy management to support different networking modes such as GSM, 3GPP R99, 3GPP

R4, and 3GPP R5 networking. Figure 1-1 shows the typical networking for Huawei mobile

softswitch solution in 3GPP R4 networking.

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Figure 1-1 Networking for Huawei mobile softswitch solution

PSTN

InternetUTRAN

Other

networksMSC server

(MSOFTX3000)

MSC server

(MSOFTX3000)

MGW

(UMG8900)

MGW

(UMG8900)

HLR

GGSNSGSN

BSS

CN

Bearer channel

Signaling channel

3G access

2G access

CS

PS

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

BSS: base station

subsystem

According to the evolution policy for the CS domain of the mobile CN, the MSC in the GSM

and 3GPP R99 networking is replaced by two functional entities, namely, the MSC server and

media gateway (MGW), in the 3GPP R4 and later networking to meet the requirements for

development towards all-IP networks.

MSC server: The MSC server provides access to the base station subsystem (BSS) or

UMTS terrestrial radio access network (UTRAN). It implements control functions such

as mobility management, security management, switchover processing, signaling

processing, call processing, and subscriber service data management (VLR function).

MGW: The MGW implements functions such as media conversion, bearer control,

digital signal coding/decoding, echo cancellation, and conference bridging.

1.2 Positioning of the UMG8900

The UMG8900 can function as any of the following devices in Huawei mobile softswitch

solution:

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 the

GSM network, supporting the integration of these functions

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VMSC, TMSC, or GMSC together with Huawei MSC server in the universal mobile

telecommunications system (UMTS) R99 network, supporting the integration of these

functions

MGW in the UMTS R4 core network

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

subsystem (IMS) network

In the fixed-mobile convergence (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, code division multiple access (CDMA), and next generation

network (NGN) networking and can be applied in convergence of UMTS, 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 the

UMG8900 is based on the separated architecture, it is easy and quick to introduce new

services.

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

provides maintainable, operable and manageable customized network solutions. The solutions

lay a foundation for network operators to obtain more profits.

1.3 Benefits for Customers

Serving as a bearer device in Huawei mobile softswitch solution, the UMG8900 converts

service bearers, enables interworking between services, and processes service stream formats.

With the help of these functions, the UMG8900 can help carriers build low-cost, profitable,

and future-oriented mobile communications networks.

High integration with the traffic support of 80000 erlangs in each cabinet

Up to three SSM-160 frames can be self-cascaded. The three SSM-160 frames occupy a

cabinet. One cabinet supports the traffic of up to 80000 erlangs. The frames can be

flexibly configured according to the actual networking conditions and capacity

requirements of users.

Diversified interfaces

The UMG8900 provides multiple clock interfaces and other types of interfaces that meet

the requirements of TDM, IP, and ATM bearer services.

Facilitation of all-IP network construction

The UMG8900 provides the IP-based A/Iu interface and IP-based Nb interface and

supports IP over E1, enabling evolution to the all-IP network. In addition, the UMG8900

supports the Real-time Transport Protocol (RTP) multiplexing and IP voice compressor

plus (IVCP) functions to save a large amount of bandwidth, thus reducing the

transmission cost.

Powerful fault tolerance capability

The UMG8900 supports dual-homing, Stream Control Transmission Protocol (SCTP)

multi-homing, and MSC pool networking to ensure system reliability.

Enhanced IP quality of service (QoS) and voice quality

The UMG8900 provides the functions of dynamic jitter buffer, packet loss compensation

(PLC), automatic gain control (AGC), electrical echo cancellation (EEC), and tandem

free operation/transcoder free operation (TFO/TrFO) to enhance voice quality, which

improves customer satisfaction.

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Upgrade without service interruption

During a software upgrade, the UMG8900 ensures that online services are not affected

and calls are not interrupted. Moreover, the period during which users cannot access new

services is not more than 10 seconds.

Powerful IP operation and maintenance capability

To facilitate maintenance in an all-IP network, the UMG8900 provides the functions of

IP connection admission control (CAC), IP QoS detection, and dialing tests for specified

IP addresses. This reduces maintenance cost.

FMC networking applications

The UMG8900 can be partitioned into multiple virtual media gateways (VMGWs). In

this manner, bearer and media resources on one UMG8900 can be shared among

different networks such as the GSM, UMTS, CDMA, NGN, and IMS networks, reducing

the capital expenditure (CAPEX) and OPEX of customers.

Embedded video interworking gateway (VIG)

The UMG8900 processes video service streams and converts video service streams of

different formats. It can cooperate with the softswitch to provide diversified video

communications services.

Easy operation and maintenance

The UMG8900 can be managed locally or remotely through the graphical user interface

(GUI) client (device panel on the LMT), man-machine language (MML) command lines

on the local maintenance terminal (LMT), and network management system (NMS). In

addition, comprehensive help information is provided to facilitate operation and study of

users.

Perfect security design

Security control is enabled for system control data and operation and maintenance data,

guaranteeing security of user data and services.

Intelligent power consumption reduction

When the resource usage on the UMG8900 is low, certain boards are automatically

powered off to reduce power consumption.

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2 Product Features High Integration with the Traffic Support of 80000 Erlangs in Each Cabinet

For improving the integration of the UMG8900 and reducing the power consumption and

equipment room space consumption, the new hardware platform, SSM-160 frame, is

introduced in UMG8900 V200R009. The SSM-160 frame significantly increases the

processing capability of a single frame of the UMG8900 to 160 K TDM. In addition, the

supported traffic by three SSM-160 frames self-cascaded in a cabinet can be up to 80000

erlangs.

Diversified Interfaces

Table 2-1 lists the interface types supported by the UMG8900.

Table 2-1 Interface types

Interface Type Number Description

E1/T1 Up to 1512 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 interfaces and share the

hardware.

E3/T3 Up to 102 The interfaces are used to connect with the BSC,

PSTN, 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 interfaces and share the

hardware.

E1/T1 ATM

(IMA)

Up to 544 The interfaces are used to connect with the RNC.

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STM-1 ATM Up to 68 pairs The 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-3

SONET

Up to 72

(load-sharing

mode) or 68

pairs

(master/slave

mode)

The interfaces are used to connect with the BSC,

PSTN, 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 272

load-sharing

mode) or 136

pairs

(master/slave

mode)

The interfaces are used to connect with the peer

UMG8900s.

They are used to bear IP voice services.

FE (control) Up to three

pairs

The interfaces are used to connect with MSC

servers.

They are used to exchange H.248 messages.

FE (SIGTRAN) Up to three

pairs

The interfaces are used to connect with MSC

servers.

They are used for the signaling adaptation based on

SIGTRAN. They work in the 1+1 backup mode.

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

the network management device. They work in the

1+1 backup mode.

GE (bearer) Up to 34 pairs

(load-sharing)

or 17 pairs

(master and

slave)

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

transmission distance is 0.55 km (multi-mode), 10

km (single-mode), 40 km (single-mode) and 70 km

(single-mode) respectively.

8 kHz clock

interfaces

4 The interfaces are used to extract line clock signals

from TDM interface boards. They work in

master/slave mode.

BITS clock

interfaces

2 The interfaces include the 2048 kHz interface, 2048

kbit/s interface, 1544kbit/s interface and 64kHz

interface. They are used to extract clock signals

from a BITS. They work in master/slave mode.

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GPS/GLONASS

clock interfaces

2 The interfaces are used to receive synchronous clock

signals from a satellite synchronous system. They

work in master/slave mode.

The UMG8900 supports small form factor pluggable (SFP) optical modules for the STM-1

SDH/SONET interface. These interfaces can be configured with different optical modules in

different applications.

Facilitation of All-IP Network Construction

Service interworking between two all-IP networks can be realized by setting different

domains. The UMG8900 provides the IP-based A/Iu and IP-based Nb interfaces and supports

the IP over E1 feature to facilitate smooth evolution to all-IP networks.

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-IP

network. Thus, the BSS and NSS may share the IP bearer network.

IP over E1 function

The UMG8900 converts IP data packets into TDM packets and serves as a router to

transparently transmit packets. If the IP bearer interface in use is a Serial or VT interface,

the UMG8900 supports the Compressed Real-Time Protocol (cRTP) function. In this

case, the UMG8900 reduces the bandwidth occupied by RTP packets by compressing the

RTP packets, thus improving transmission efficiency.

IVCP function

In IP over E1 applications, the UMG8900 can compress IP packets to reduce the bearer

bandwidth occupied by voice over IP (VoIP) packets. In this case, the compression

capability of the UMG8900 is close to that of the digital circuit multiplication equipment

(DCME), and external devices are not required. This function helps to reduce the IP

transmission bandwidth usage and network construction cost of carriers.

RTP multiplexing function

In Fast Ethernet (FE) and Gigabit Ethernet (GE) applications, multiple voice packets can

share one IP packet header, which reduces the IP transmission bandwidth usage and

network construction cost of carriers. In addition, the number of IP packets to be

transmitted decreases, thus reducing the traffic load on routers.

The UMG8900 also supports automatic dialling tests on the IP bearer network and VisualIP

information collection. In cooperation with the Serv-Monitor and VisualIP products, it

monitors network failures, optimizes network functions, and reduces operating expenditure

(OPEX).

Powerful Fault Tolerance Capability

The UMG8900 provides powerful fault tolerance capability in terms of the following,

guaranteeing carrier-class reliability of the system.

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

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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 avoid

any 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.

The UMG8900 supports the SCTP multi-homing function. In an SCTP association, the

UMG8900 and its peer device can be configured with multiple IP addresses, providing

multiple end-to-end paths for upper-layer protocol users. In this manner, the transmission

reliability is ensured.

The UMG8900 supports the A-Flex/Iu-Flex function to realize MSC pool networking. In

MSC pool networking, devices in the access network can connect to each MSC server

without being upgraded. MSC servers in an MSC pool work in load-sharing mode and

their resources can be shared. If an MSC server fails, another MSC server in the MSC

pool takes over services provided by the faulty MSC server to implement network fault

tolerance. The UMG8900 also supports NAS node selection function (NNSF). When an

MSC server fails, the NNSF enables the services of the BSC to be passed to the nearest

MSC server, implementing fault tolerance and save communication resources.

When the system is overloaded, the call completion rate of VIP users is guaranteed by

preference.

Enhanced IP QoS and Voice Quality

The UMG8900 provides the functions such as EEC, PLC, Enhanced PLC, AGC, dynamic

jitter buffer, and TFO/TrFO/Acoustic Echo Cancellation for TrFO Calls (AEC for TrFO) to

enhance voice quality, which improves user experience. The following lists the functions and

methods to enhance the IP QoS and voice quality:

Voice quality assurance technologies such as EEC, voice activity detection (VAD),

background noise reduction (BNR), comfort noise generation (CNG), AGC, PLC,

Enhanced PLC, voice quality enhancement (VQE), TFO/TrFO, and (AEC for TrFO).

NOTE TrFO is the transport of compressed speech in a packet transport network through the elimination of

unnecessary coding and decoding of signals by intermediate elements in the bearer path. By

transporting only the compressed speech, TrFO achieves bandwidth efficiencies in the bearer stream

and reduces round trip delays introduced by unnecessary transcoding, thus increasing voice quality.

The TrFO function is defined in 3rd Generation Partnership Project (3GPP) R4 specifications and is

supported by the UMG8900.

TFO is configured for two transcoders that support the TFO protocol. When the codec types of the

two transcoders are matched, this function enables inband negotiation about codec selection instead

of codec conversion, thus improving voice quality. The TFO function is defined in 3GPP GSM, R99,

and R4 specifications and is supported by the UMG8900.

Enhanced PLC is an enhanced frame loss compensation algorithm that is mainly applicable to voice

services to enhance the capability of preventing packet loss and improve the voice quality in the case

of frame loss.

Various QoS assurance methods such as the setting of voice and data service priorities,

dynamic jitter buffer, IP type of service (ToS), differentiated service code point (DSCP),

802.1P/Q and virtual local area network (VLAN) priority.

Online end-to-end voice quality detection of VoIP users: Data about user voice quality

can be displayed graphically, facilitating network management and optimization for

carriers.

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Upgrade Without Service Interruption

During a software upgrade, the UMG8900 ensures that online services are not affected and

calls are not interrupted. Moreover, the period during which users cannot access new services

is less than10 seconds. This feature minimizes the impact of a software upgrade on services

and reduces the number of access failures, thus enlarging the profits of carriers.

In the UMG8900, the boards are grouped into different batches for batch-by-batch software

loading.

The boards working in master/slave mode are categorized into the master plane and slave

plane. The slave plane is upgraded first, and then the master plane is upgraded.

The boards working in load-sharing mode are grouped according to their functions. Only

some boards in a group are upgraded each time to ensure that a board that can provide

services is available in each group.

In this manner, services are not interrupted during the upgrade.

Powerful IP Operation and Maintenance Capability

During fast migration of mobile CNs to IP networks, carriers face a great challenge. They

need to integrate carrier-level service security and reliability provided by the TDM network

into the IP network.

The IP network is complex; therefore, it may encounter various faults. To ensure that the IP

network can be better applied to voice communications, the UMG8900 provides the following

mechanisms:

Dialing tests for specified IP addresses and users: The UMG8900 can automatically loop

back terminations in voice channels, expediting fault location and service verification,

and facilitating maintenance and management by carriers.

Active IP QoS detection: The UMG8900 supports the QoS-based IP CAC function.

When services on the IP network are blocked, the UMG8900 actively decreases service

traffic, thus reducing the congestion on the IP network and improving the call

completion rate on the CN.

VisualIP server provides graphical user interfaces (GUIs) for viewing paths between

network elements (NEs), bandwidth, and QoS by using Internet Explorer (IE) or other

terminals, thereby facilitating OM.

NOTE

An independent server for saving the OM data is required for using the VisualIP server.

FMC Networking Applications

FMC has become an inevitable trend for traditional carriers to evolve into comprehensive

carriers. To meet this requirement, the UMG8900 employs the advanced fixed-mobile

converged hardware platform and software platform and supports services of multiple

networks such as the UMTS, CDMA, NGN, and IMS networks by integrating functions of the

original independent functional entities. In this case, resources on one UMG8900 can be

shared among different networks. On one physical platform, the UMG8900 can serve as

different functional entities. Thus, the UMG8900 can implement interworking of bearer

resources in the service plane and provide various bearer resources and diversified user access

functions. The UMG8900 supports interworking between the IP multimedia subsystem (IMS)

and other networks when functioning as an IM-MGW and supports interworking between two

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IMSs when cooperating with the MSOFTX3000 to provide the interworking border gateway

function (IBGF).

In the softswitch architecture, the UMG8900 is controlled by the MSC server. One UMG8900

can be partitioned into multiple VMGWs. These VMGWs provide functions independently

and are managed by softswitches in different networks. For example, after a UMG8900 is

partitioned into two VMGWs, the VMGWs can be controlled by a fixed softswitch and a

mobile softswitch separately so that the FMC application is implemented. The large-capacity

and high-performance converged MGW has the following advantages:

The number of network elements (NEs) is reduced, thus saving the CAPEX.

The fixed-mobile converged MGW simplifies the network topology and cuts the OPEX

by reducing spare parts and implementing integrated maintenance.

VMGWs can directly interwork with each other, thus reducing the end-to-end delay and

improving the voice quality.

Resources of different fields are shared, improving the device usage efficiency.

Embedded VIG

The UMG8900 supports the embedded VIG function. It can cooperate with the MSC server to

provide diversified video communications services. With the embedded VIG function enabled

on the UMG8900, the video interworking between mobile networks and IMS and NGN

networks can be realized without deployment of an independent VIG. This function has the

following advantages:

Simplifying the networking

Reducing indirect voice channels

Decreasing call delay

Improving quality of video calls

Cutting the CAPEX and OPEX of carriers

The UMG8900 supports the Windowed Numbered Simple Retransmission Protocol (WNSRP)

technology to realize quick call connection; it can interwork with the Multimedia Ring Back

Tone (MRBT) platform to play multimedia ring back tones for 3G video terminals.

In addition to the interworking in the control plane, multiplexing and demultiplexing in the

bearer plane, and codec conversion in the media plane, the UMG8900 also supports the

following features and functions with the embedded VIG function:

H.263 ,MPEG-4 and H.264 video codecs

H.245 video call control and H.223 video service multiplexing protocols

Convergence of video and voice

Lawful interception of multiplexing multimedia streams

The UMG8900, adopting flexible and extensible software and hardware architectures, can

provide extended services after a software upgrade.

Easy Operation and Maintenance

The UMG8900 provides the following operation and maintenance functions:

The UMG8900 can be accessed and managed locally and remotely by multiple users

through the GUI client (device panel on the LMT), centralized network management and

maintenance interface, or MML commands.

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Comprehensive help information is provided through the LMT that can be easily

operated.

The UMG8900 supports online report of hardware and software versions, online

software loading, and online patch installation. This feature enables software upgrade

and maintenance without affecting the system running.

The UMG8900 supports version consistency check, manual and automatic version check,

and version rollback.

The UMG8900 provides logs, alarms, traffic measurement, and fault diagnosis functions

to facilitate fault prevention, fault location, and troubleshooting.

The UMG8900 provides tools for information collection, health check, and log analysis,

and supports online and offline analysis and maintenance of the operating status.

The UMG8900 supports the call history record (CHR) function. In this manner, key

information about calls can be recorded and converted into CHRs, and the CHRs can be

stored on the server for value-added applications such as real-time monitoring and fault

location.

The LMT can run on EMS clients to provide remote operation and maintenance.

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, you

can 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 can

effectively 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 unauthorized

access invalid. Service data can be accessed only in certain condition. The system

ensures that only authorized users can obtain correct data.

Through the access control list (ACL), you can configure the firewall flexibly to filter

messages 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.

Intelligent Power Consumption Reduction

The UMG8900 can monitor and manage the resource boards with high power consumption in

real time. When the resource usage is low, certain boards are automatically powered off for

energy saving and emission reduction.

When service traffic decreases, the UMG8900 analyzes the history records and predicts the

future tendency, and then determines to power off certain resource boards to reduce power

consumption without affecting services. If service traffic and resource usage increase, the

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UMG8900 powers on resource boards gradually to meet the requirements on media resources

when service traffic is heavy.

HUAWEI UMG8900

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3 Product Architectures 3.1 Hardware Architecture

3.1.1 Cabinet Exterior

The UMG8900 is placed in N68E-22 cabinet provided by Huawei. Figure 3-1 shows the front

view of an N68E-22 cabinet.

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Figure 3-1 Front view of an N68E-22 cabinet

The N68E-22 cabinet has a front door and a rear door, and is easy to install.

An N68E-22 cabinet has a 46 U inside space (1 U = 44.45 mm = 1.75 inches). It comprises a

power distribution frame (PDF), three semi-integrated frames, a cabling trough, multiple filler

panels, a rack, multiple guide rails and one or more side hang fiber coilers. It is supplied with

48 V/60 V DC power. It conforms to IEC297 standards and meets the requirement for flexible module configuration.

The N68E-22 cabinet can adopt the front and back maintenance modes, and support upward

and downward cabling modes. The N68E-22 cabinet can be placed and connected with cables

based on the actual conditions of the equipment room.

In addition, the N68E-22 cabinet adopts the standard 19-inch structure. Other frames based on

the standard 19-inch structure can be placed in free space of the cabinet to improve the

utilization of the equipment room.

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3.1.2 Frame Exterior

The UMG8900 supports three types of frames, namely, SSM-256, SSM-160, and SSM-32

frames. These three types of frames are the same in exterior, but their backplanes and main

control boards are different. The SSM-160 frame is introduced in UMG8900 V200R009.

Figure 3-2 shows the front view of an SSM-160 frame.

Figure 3-2 Front view of an SSM-160 frame

An SSM-160 frame has 30 front and back slots in total. In the main control frame, the MOME

and MTND are configured by default. In a service frame, the MMPE and MTND are

configured by default.

A fan box is integrated at the bottom of a cabinet. On the back of a cabinet, there are power

input and monitoring interfaces as well as the dual in-line package (DIP) switches that are

used to set frame No.

The UMG8900 frame is a semi-integrated frame with a fan box. The frame provides front and

back slots in pair to hold boards. The frame is 12U in height and the middle 9U is for boards.

A front board is 9U in height while a back board is 8U. Thus, 1U at the back of the frame is

for the filtering box.

Because a front slot differs from a back slot in height, front and back boards cannot be

inserted crossly.

3.1.3 Hardware Fundamentals

The UMG8900 supports the SSM-256, SSM-160, and SSM-32 frames that can be cascaded in

multiple modes. When the UMG8900 serves as a local exchange, it can connect to an external

shared interworking function (SIWF) frame to provide the interworking function (IWF).

Figure 3-3 shows the hardware components of the UMG8900 when only SSM-160 frames are

configured.

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Figure 3-3 Hardware components (SSM-160 frames)

When the UMG8900 works as a VMSC, it needs to attach an SIWF frame to provide the IWF

function. The frames of the UMG8900 can be logically classified into the main control frame,

service frame, and central switching frame. The main control frame is always numbered 1.

The main control frame can also serve as the central switching frame at the same time.

When only SSM-160 frames are configured, TDM, FE, and GE cascading channels are

available between frames. The UMG8900 supports the cascading capability of 2 x 16 K TDM,

2 x FE, and 2 x GE, up to three SSM-160 frames can be cascaded. The TNDs in the main

control frame are cascaded with the TNDs in the other frames; therefore, no independent

cascading boards are required.

When the SSM-160 frames are configured, independent CLKs are required to provide

stratum-2A and stratum-3 clock signals. The other frames extract required clock signals from

the TDM cascading cables between frames. In this manner, independent clock distribution

cables are not required.

3.1.4 Cabinet Architecture

The UMG8900 supports the UMG8900 assembly cabinet (V200R009; six 48 VDC inputs).

the UMG8900 assembly cabinet (V200R009; six 48 VDC inputs) is used when the UMG8900 and the shared interworking function (SIWF) frame of 2U height need to be

configured in the same cabinet.

The internal components include PDF, SSM frame, and 2 U SIWF. The next figure shows the

full configuration of internal components of the UMG8900 high-density assembly cabinet.

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Figure 3-4 Structure of the UMG8900 assembly cabinet (V200R009; six 48 VDC inputs).

1. Front view 2. Rear view 3. Power distribution frame

4. Filler panel 5. SSM frame 6. Fan box

7. Air frame 8. Ventilation filler panel 9. 2 U IWF frame

10. Horizontal wiring trough

The cabinet is 2200 mm high, 600 mm wide and 800 mm deep. The available space within the

cabinet is 46 U (1 U = 44.45 mm = 1.75 inches).

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A single cabinet is composed of a power distribution frame, service frames, cabling troughs,

filler panels, a cabling rack, slide rails and side hang fiber coilers. The cabinet adopts 48 V/60 V DC power supply. The cabinet conforms to IEC297 standards and supports flexible configuration of modules in it.

A cabinet has a front door and a back door, which enable the device maintenance from both

the front and back of the cabinet.

The UMG8900 supports multi-frame cascading to cover applications from 21 E1s/T1s to

1512 E1s/T1s smoothly. In the large-capacity networking, more than one cabinet is required.

3.1.5 Frame Architecture

The SSM frame of the UMG8900 adopts the semi-integrated structure. A frame is integrated

with a fan box and provides front and back slots in pairs to hold boards.

Figure 3-5 shows the board deployment in an SSM-160 frame.

Figure 3-5 Board deployment in an SSM-160 frame

The exterior of an SSM-160 frame is the same as the exterior of an SSM-256 frame, but they

are installed with different backplanes. Board deployment in an SSM-160 frame is described

as follows:

Back slots 7 and 9 can be installed with the TNDs only. Each TND occupies two slots;

therefore, back slots 6 and 8 cannot be installed with other boards.

Front slots 7 and 8 can be installed with only the main control boards OMEs or MPEs.

Each OME or MPE occupies one slot. The OMEs are always installed in the main

control frame, and the MPEs are always installed in other SSM-160 frames.

Front slots 6 and 9 can be installed with only the CMEs that correspond to the physical

boards MCMEs.

Common slots are for service processing boards. The CLKs must be installed in back

slots 0 and 1 in the main control frame.

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CAUTION

For a board that requires a corresponding back board, if a front slot is inserted with a specified

service board, the corresponding back slot must be inserted with an interface board.

For details about board configuration, see the online help for MML commands.

3.1.6 Logical Fundamentals

Figure 3-6 shows the logical components of the hardware of an SSM-160 frame.

Figure 3-6 Logical components of the SSM-160 hardware

The UMG8900 accesses and processes IP/ATM/TDM bearer services, exchanges media

gateway control data with the softswitch, processes media resources and performs adaptation

and transparent transmission of signaling. The UMG8900 also provides auxiliary functions

such as the management and maintenance of the device, the clock and cascading functions.

Based on the functions and the distributed modular architecture, the hardware system of the

UMG8900 can be divided into the media gateway control and management module, TDM

processing module, service resource module, packet processing module, signaling adaptation

module and cascading module.

These modules are described as follows.

Gateway Control and Management Module

The gateway control and management module mainly performs the following two functions:

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Under the control of the gateway controller, this module invokes various bearer and

service resources within the UMG8900, sets up service bearers and processes service

stream formats.

This module is responsible for the management and maintenance of the UMG8900. The

UMG8900 adopts the client/server mode. The client LMT connects with the BAM of the

UMG8900 to maintain and manage the UMG8900.

The CMU board provides the gateway control function. The OMU/TNU board provides the

management and maintenance function.

The physical board corresponding to the CMU is the MCME. The physical board

corresponding to the OMU is the MOME. The physical board corresponding to the TNU is

the MTND.

Packet Processing Module

The packet processing module includes two parts: packet switching, and packet processing

and interface.

The packet switching module switches packet services of the gateway. In the SSM-160 frame,

the packet switching function is implemented by the control and management module OMU

or MPU. In an SSM-160 frame, the corresponding physical board is the MOME or MMPE.

For the SSM-160 frame, the packet switching module provides 48 GE packet switching

capability.

The packet processing and interface module processes packet service bearers of the gateway

and provides hardware interfaces for packet services.

The UMG8900 provides packet service bearer modes: IP, ATM, and IPoE1. The three modes

correspond to different hardware types of boards for the bearers.

The hardware of the IP packet processing mainly includes the HRB The corresponding

physical boards are the MHRD.

The hardware of the ATM packet processing and interface module mainly includes the ASU,

A4L, EAC, and TAC. The corresponding physical boards are the MASU, MA4L, MEAC, and

MTAC.

TDM Processing Module

The TDM processing module includes three parts: TDM interface, clock processing and TDM

switching.

The TDM interface module provides TDM interfaces of the UMG8900 and supports

extracting line clocks as clock reference sources. The TDM interface module mainly includes

the E63, T63, PIE, S4L, and S8L boards. The corresponding physical boards are the ME63,

MT63, MPIE, MS4L and MS8L.

The clock processing module provides clock signals required and supports access of various

clock reference sources. The clock processing module mainly includes the CLK and the

corresponding physical board is the MCLK.

Clock signals are provided by the CLK. Stratum-2A and stratum-3 clock signals can be

provided.

The TDM switching module is implemented by the TNU that corresponds to the physical

board MTND.

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Service Resource Module

The service resource module processes media stream formats and provides resources for

service connection.

The hardware of this module mainly includes the VPU and ECU boards. The ECU provides

the echo cancellation (EC) function. The VPU provides announcement playing, digit

collecting and audio mixing functions. In addition, the VPU can provide all the functions of

the ECU. The corresponding physical boards are the MVPD and MECU.

Signaling Adaptation Module

The signaling adaptation module adapts the signaling of the wireless access network and

PSTN to the signaling of the IP packet network.

This module cooperates with the TDM processing module, packet processing module and

gateway control and management module to adapt and forward signaling.

This module includes the SPF. The corresponding physical board is the MSPF.

Cascading Module

The UMG8900 supports different application capacities through the single-frame and

multi-frame cascading modes. The cascading module provides the cascading of packet, TDM

and control service streams in the multi-frame cascading mode.

The cascading module consists of the packet service processing sub-module and TDM service

processing sub-module and contains the TNU and OMU/MPU. The TNU and OMU/MPU

correspond to the physical boards MTND and MOME/MMPE.

3.1.7 Boards of All SSM Frames

Table 3-1 Equipment and resource management units

Board Name Backup Mode

Board Position Function

Logical Board

Physical Board

Operation &

Maintenance

Unit (OMU)

Media gateway

Operation &

Maintenance Unit

(MOMU)

Master/sla

ve

The MOMUs are

used in the SSM-256

frame.

The MOMUs are

inserted in front slots

7 and 8 in the main

control frame.

The corresponding

back board is the

NET.

The OMU

manages all the

frames of the

MGW in the

case of

multi-frame

cascading.

The OMU

implements the

switching

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Logical Board

Physical Board

Media gateway

Operation &

Maintenance Unit

B (MOMB)

Master/sla

ve

The MOMBs are

used in the SSM-32

frame.

The MOMBs are


6, 7, 8, and 9 in the

main control frame.

Each board occupies

two slots.

The corresponding

back board is the

MTNC.

function of the

data planes for

broadband

services.

The OMU

provides the

external

interfaces

including the

Console

interface.

Operation &

Maintenance

Unit (OMU)

Media gateway

Operation &

Maintenance Unit

Enhanced

(MOME)

Master/sla

ve

The MOMEs are

used in the SSM-160

frame.

The MOMEs are


7 and 8 in the main

control frame.

The corresponding

back board is the

MTND.

The OMU

manages all the

frames of the

MGW.

Main

Processing

Unit (MPU)

Media gateway

Main Processing

Unit (MMPU)

Master/sla

ve

The MMPUs are

used in the SSM-256

frame.

The MMPUs are


7 and 8 in the frames

except the main

control frame.

The corresponding

back board is the

NET.

The MPU

manages the

boards in the

frame where the

MPU is located.

The MPU

implements the

switching

function of the

data planes for

broadband

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Logical Board

Physical Board

Media gateway

Main Processing

Unit B (MMPB)

Master/sla

ve

The MMPBs are

used in the SSM-32

frame.

The MMPBs are


6, 7, 8, and 9 in the

service frame.

Each board occupies

two slots.

The corresponding

back board is the

MTNC.

services.

Main

Processing

Unit (MPU)

Media gateway

Main Processing

Unit Enhanced

(MMPE)

Master/sla

ve

The MMPEs are

used in the SSM-160

frame.

The MMPEs are


7 and 8 in the

service frame.

The corresponding

back board is the

MTND.

The MPU

manages the

boards in the

frame where the

MPU is located.

Connection &

Management

Unit (CMU)

Media gateway

Connection

Maintenance Front

Unit (MCMF)

Master/sla

ve

The MCMFs are

used in the SSM-256

frame or SSM-32

frame.

The MCMFs are

inserted in common

front slots.

No corresponding

back board is

required.

The CMU

processes

messages of the

media resource

control protocol

and operates the

corresponding

resources.

Media gateway

Connection

Maintenance Back

unit (MCMB)

Master/sla

ve

The MCMBs are

used in the SSM-256

frame or the SSM-32

frame.

The MCMBs are

inserted in common

back slots.

No corresponding

front board is

required.

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Logical Board

Physical Board

Connection &

Management

Unit (CMU)

Sub-card of

Connection &

Management Unit

(SCMU)

Master/sla

ve mode

in paired

slots

The SCMUs are

inserted in two

subboard slots on the

UG02MOMB or

UG02MMPB in the

SSM-32 frame.

The CMU

processes

messages of the

media resource

control protocol

and operates the

corresponding

resources.

Connection &

Management

Unit (CMU)

Media gateway

Connection &

Management

Express Unit

(MCME)

Master/sla

ve

The MCMEs are

used in the SSM-160

frame.

The MCMEs are


6 and 9 by

preference, and can

also be configured in

other slots.

No corresponding

back board is

required.

The CMU

processes

messages of the

media resource

control protocol

and operates the

corresponding

resources.

Protocol

Processing

Unit (PPU)

Media gateway

Back Protocol

Processing Unit

(MPPB)

Load

sharing

The MPPBs are used

in the SSM-256

frame or the SSM-32

frame.

The MPPBs are

inserted in common

back slots.

No corresponding

front board is

required.

The PPU

processes the

H.248/SCTP/U

DP/TCP/IP

protocols.

The PPU

provides

external

interfaces

including the

FE interface.

Media gateway

Connection

Maintenance Front

Unit (MCMF)

Load

sharing

The MCMFs are

used in the SSM-256

frame or SSM-32

frame.

The MCMFs are

inserted in common

front slots.

No corresponding

back board is

required.

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Logical Board

Physical Board

Media gateway

Connection

Maintenance Back

unit (MCMB)

Load

sharing

The MCMBs are

used in the SSM-256

frame or SSM-32

frame.

The MCMBs are

inserted in common

back slots.

No corresponding

front board is

required.

Protocol

Processing

Unit (PPU)

Sub-card of

Connection &

Management Unit

(SCMU)

Master/sla

ve mode

in paired

slots

The SCMUs are

inserted in two

subboard slots on the

UG02MOMB or

UG02MMPB in the

SSM-32 frame.

The PPU

processes the

H.248/SCTP/U

DP/TCP/IP

protocols.

Table 3-2 Service and protocol processing units



Logical Board

Physical Board

High-speed

Routing Unit

(HRB)

Media gateway

High-speed

Routing Unit

(MHRU)

Master/sl

ave

The MHRUs are

used in the SSM-256

frame or SSM-32

frame.

The MHRUs are

inserted in common

front slots.

The corresponding

back interface board

is the E8T/E1G.

The HRB

forwards

RTP/RTCP/IP

bearer services.

High-speed

Routing Unit

(HRB)

Media gateway

RTP Processing

Unit (MRPU)

Master/sl

ave

The MRPUs are used

in the SSM-256

frame or SSM-32

frame.

The MRPUs are

inserted in common

front slots.

The corresponding


is the E8T/E1G.

The HRB

processes IP

routes, and

converges and

distributes IP

services.

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Logical Board

Physical Board

High-speed

Routing Unit

(HRB)

Media gateway

High-speed

Routing Unit D

(MHRD)

Master/sl

ave

The MHRDs are

used in the SSM-256

frame, SSM-160

frame or SSM-32

frame.

The MHRDs are

inserted in common

back slots.

The corresponding

back interface

subboard is the

D8FT/D1GO.

The HRB

processes IP

routes, and

converges and

distributes IP

services.

The HRB

provides access

services.

High-speed

Routing Unit

(HRB)

Media gateway IP

over E1 Unit

(MIOE)

Master/sl

ave

The MIOEs are used

in the SSM-256

frame, SSM-160

frame or SSM-32

frame.

The MIOEs are

inserted in common

front slots.

The HRB

implements the

IP over E1

function.

When the

MIOE is used

in the SSM-256

frame, the

MTNB rather

than the

MTNU/TCLU

can be

configured.

IP Forward

Unit (IFU)

Media gateway

High-speed

Routing Unit

(MHRU)

Load

sharing

The MHRUs are

used in the SSM-256

frame or SSM-32

frame.

The MHRUs are

inserted in common

front slots.

The corresponding


is the E8T.

The IFU

implements the

function of

reporting

CHRs.

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Logical Board

Physical Board

IP Forward

Unit (IFU)

Media gateway

High-speed

Routing Unit D

(MHRD)

Load

sharing

The MHRDs are

used in the SSM-256

frame, SSM-160

frame or SSM-32

frame.

The MHRDs are

inserted in common

back slots.

The corresponding

back interface

subboard is the

D8FT.

The IFU

implements the

function of

reporting

CHRs.

ATM

AAL2/AAL

5 SAR

Processing

Unit (ASU)

Media gateway

ATM AAL2/AAL5

SAR Processing

Unit (MASU)

Master/sl

ave

The MASUs are used

in the SSM-256

frame or SSM-32

frame.

The UG02MASUs

are used in the

SSM-160 frame.

The MASUs are

inserted in common

front slots in the

main control frame

or the service frame.

The corresponding

back board is the

A4L/EAC/TAC.

The ASU

processes ATM

services.

Front

Signaling

Processing

unit (SPF)

Media gateway

Front Signaling

Processing unit

(MSPF)

Load

sharing

The UG01MSPFs are

used in the SSM-256

frame.

The

UG02MSPF/UG03M

SPF/UG04MSPFs

are used in the

SSM-256 frame or

SSM-32 frame.

The UG04MSPFs are

used in the SSM-160

frame.

The MSPFs are

inserted in common

front slots.

No corresponding

back board is

required.

The SPF

performs

signaling

adaptation and

transfers

signaling.

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Table 3-3 Switching and cascading units



Logical Board

Physical Board

Packet

switch Unit

(NET)

Media gateway

Packet switch

Unit (MNET)

Master/sl

ave

The MNETs are used

in the SSM-256

frame.

The MNETs are

inserted in back slots

7 and 8.

The corresponding

front board is the

MPU/OMU.

The NET

implements the

packet service

switching

function.

The NET

implements the

data cascading

function

between

frames.

The NET

provides

external

interfaces

including the 2

x GE, 4 x FE,

Clock, MIR,

and OMC

interfaces.

Front Link

Unit (FLU)

Media gateway

Front Link Unit

(MFLU)

No

backup

The MFLUs are used

in the SSM-256

frame.

The MFLUs are

inserted in common

front slots in the

central switching

frame.

The FLU and

BLU provide

32K cascading

capacity, and

interfacing and

switching

functions in the

TDM

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Logical Board

Physical Board

Back Link

Unit (BLU)

Media gateway

Back Link Unit

(MBLU)

Master/sl

ave

The MBLUs are used

in the SSM-256

frame.

The MBLUs are

inserted in common

back slots in the

central switching

frame.

narrowband

data plane.

The FLU and

BLU provide 2

x 1.25 Gbit/s

cascading

capacity and

interfacing

function in the

broadband data

plane.

The BLU

provides 100

Mbit/s IP

control data

channels to

directly connect

frames.

The BLU

provides

cascading

interfaces.

Net Link

Unit (NLU)

Media gateway Net

Link Unit (MNLU)

Load

sharing

The MNLUs are

used in the SSM-32

frame.

The MNLUs are


4 and 5 and back

slots 10 and 11.

The NLU

provides 2 x

1.25 Gbit/s or 1

x 1.25 Gbit/s

cascading

capacity and

interfacing

function in the

broadband data

plane.

TDM central

switching

Net Unit

(TNU)

Media gateway

TDM switching Net

Unit (MTNU)

Master/sl

ave

The MTNUs are

used in the SSM-256

frame.

The MTNUs are


6 and 9.

No corresponding

front board is

required.

The TNU

implements

TDM service

switching.

The MTNU or

TCLU provides

3 x 8K TDM

cascading

interfaces and

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Logical Board

Physical Board

TDM Convergence

& Link Unit

(TCLU)

Master/sl

ave

The TCLUs are used

in the SSM-256

frame.

The TCLUs are


6 and 9 in the main

control frame or the

service frame.

24K TDM

timeslot

cascading

function.

The MTNB

provides 32K

timeslot

cascading

capacity.

The MTNC

provides the

TDM/FE

cascading

interfaces and

provides the

Mc/OMC/Cloc

k interfaces.

The MTNC

provides 4 x 8K

timeslot

cascading

capacity. The

MTNC

provides the FE

switching

function for the

control plane.

The MTNC

provides

multi-frame

cascading

channels for the

FE plane and

the TDM

service plane.

The MTNC

manages the

boards in the

frame where

the MTNC is

located. The

MTNC

provides

stratum-3 clock

signals for the

system through

the clock

subboard.

Media gateway

TDM switching Net

Unit B (MTNB)

Master/sl

ave

The MTNBs are used

in the SSM-256

frame.

The MTNBs are


6 and 9.

No corresponding

front board is

required.

Media gateway

TDM switching Net

Unit C (MTNC)

Master/sl

ave

The MTNCs are used

in the SSM-32 frame.

The MTNCs are


6, 7, 8, and 9.

Each board occupies

two slots.

The corresponding

front board is the

MOMB/MMPB.

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Logical Board

Physical Board

TDM central

switching

Net Unit

(TNU)

Media gateway

TDM switching Net

Unit D (MTND)

Master/sl

ave

The MTNDs are

used in the SSM-160

frame.

The MTNDs are


7 and 8.

Each board occupies

two slots.

The corresponding

front board is the

MOME/MMPE.

The MTND

implements

TDM service

switching and

provides 160K

timeslot

switching

capacity.

The MTND

provides 2 x 8K

or 4 x 8K TDM

cascading

interfaces, 4 x

GE cascading

interfaces, and

4 x FE

cascading

interfaces.

The MTND

provides

management

functions for

the frame.

Table 3-4 Interface units



Logical Board

Physical Board

1-port GE

Optical

interface

card (E1G)

Media gateway

one-port GE

Optical interface

card (MG1O)

No

backup

The MG1Os are used

in the SSM-256

frame or SSM-32

frame.

The MG1Os are

inserted in common

back slots.

The corresponding

front board is the

HRB.

The E1G

provides one

GE interface.

2*155M

SDH/SONE

T optical

interface

card (S2L)

Media gateway

2*155M

SDH/SONET

optical interface

card (MS2L)

Master/sl

ave or

load

sharing

The UG01MS2L and

UG01MS2E can be

used only in the

SSM-256 frame.

The UG02MS2L can

The MS2L

provides two

155 Mbit/s

SDH optical

interfaces.

UMG8900 V200R009C02

Product Description



Page 38 of 67



Logical Board

Physical Board

Media gateway

2*155M

SDH/SONET

Electronical

interface card

(MS2E)

Master/sl

ave or

load

sharing

be used in the

SSM-256 frame or

SSM-32 frame.

The UG02MS2E can

be used in the

SSM-256 frame,

SSM-160 frame or

SSM-32 frame.

They are inserted in

common back slots.

No corresponding

front board is

required.

The MS2E

provides two

155 Mbit/s

SDH electrical

interfaces.

1*155M

SDH/SONE

T optical

interface

card (S1L)

Media gateway

1*155M

SDH/SONET

optical interface

card (MS1L)

Master/sl

ave or

load

sharing

They are used in the

SSM-32 frame.


common back slots.

No corresponding

front board is

required.

The MS1L

provides one

155 Mbit/s

SDH optical

interface.

The MS1E

provides one

155 Mbit/s

SDH electrical

interface.

Media gateway

1*155M

SDH/SONET

Electronical

interface card

(MS1E)

Master/sl

ave or

load

sharing

4*155M

SDH/SONE

T optical

interface

card (S4L)

Media gateway

4*155M

SDH/SONET

optical interface

card (MS4L)

Master/sl

ave or

load

sharing

The MS4Ls are used

in the SSM-160

frame.

The MS4Ls are

inserted in common

back slots.

It must be used

together with the

MTND.

The MS4L

provides four

155 Mbit/s

SDH optical

interfaces.

4 Ports

STM-1 ATM

Optical

Interface

Board (A4L)

Media gateway 4

Ports STM-1 ATM

Optical Interface

Board (MA4L)

No

backup

The MA4Ls are used

in the SSM-256

frame, SSM-160

frame or SSM-32

frame.

The MA4Ls are

inserted in common

back slots.

The corresponding

front board is the

ASU.

The MA4L

provides four

155 Mbit/s

ATM optical

interfaces.

UMG8900 V200R009C02

Product Description



Page 39 of 67



Logical Board

Physical Board

8-port

10/100M

Ethernet

interface

board (E8T)

Media gateway

8-port 10/100M

Ethernet Interface

Board (ME8T)

No

backup

The ME8Ts are used

in the SSM-256

frame or SSM-32

frame.

The ME8Ts are

inserted in common

back slots.

The corresponding

front board is the

HRB.

The ME8T

provides eight

FE interfaces.

32*E1 port

TDM

interface

board (E32)

Media gateway

32*E1 ports TDM

interface board

(ME32)

Load

sharing


SSM-256 frame or

SSM-32 frame.


common back slots.

No corresponding

front board is

required.

The ME32

provides 32 E1

interfaces to

extract line

signaling from

CAS such as

R2 and China

No.1 or to

insert line

signaling into

them.

32*E1 port

TDM

interface

board (E32)

Media gateway

32*E1 interface

card with Signaling

function Unit

(MESU)

Load

sharing


SSM-256 frame,

SSM-160 frame or

SSM-32 frame.


common back slots.

No corresponding

front board is

required.

The MESU

provides 32 E1

interfaces to

receive and

send SS5 line

signaling and

register

signaling.

The MESU can

process R1.5

signaling.

63*E1 port

TDM

interface

board (E63)

Media gateway

63*E1 ports TDM

interface board

(ME63)

Load

sharing

The ME63s are used

in the SSM-160

frame.

The ME63s are

inserted in common

back slots.

No corresponding

front board is

required.

The ME63

provides 63 E1

interfaces.

The ME63 can

process R2/R1

signaling.

UMG8900 V200R009C02

Product Description



Page 40 of 67



Logical Board

Physical Board

32*T1 port

TDM

interface

board (T32)

Media gateway

32*T1 ports TDM

interface board

(MT32)

Load

sharing

The MT32s are used

in the SSM-256

frame or SSM-32

frame.

The MT32s are

inserted in common

back slots.

No corresponding

front board is

required.

The MT32

provides 32 T1

interfaces to

extract line

signaling from

CAS such as

R2 and China

No.1 or to

insert line

signaling into

them.

32*T1 port

TDM

interface

board (T32)

Media gateway

32*T1 interface

card with Signaling

function Unit

(MTSU)

Load

sharing

The MTSUs are used

in the SSM-256

frame, SSM-160

frame or SSM-32

frame.

The MTSUs are

inserted in common

back slots.

No corresponding

front board is

required.

The MTSU

provides 32 T1

interfaces to

receive and

send SS5 line

signaling and

register

signaling.

63*T1 port

TDM

interface

board (T63)

Media gateway

63*T1 ports TDM

interface board

(MT63)

Load

sharing

The MT63s are used

in the SSM-160

frame.

The MT63s are

inserted in common

back slots.

No corresponding

front board is

required.

The MT63

provides 63 T1

interfaces.

The MT63 can

process R2/R1

signaling.

PDH

Interface

Electronical

Unit (PIE)

Media gateway

PDH Interface

Electronical Unit

(MPIE)

Master/sl

ave or

load

sharing

The MPIEs are used

in the SSM-256

frame, SSM-160

frame or SSM-32

frame.

The MPIEs are

inserted in common

back slots.

No corresponding

front board is

required.

The MPIE

provides three

E3/T3 PDH

electrical

interfaces.

UMG8900 V200R009C02

Product Description



Page 41 of 67



Logical Board

Physical Board

32-port E1

ATM

Interface

Card (EAC)

Media gateway

32-port E1/T1

ATM Interface

Card (MEAC)

No

backup

The MEACs are used

in the SSM-256

frame, SSM-160

frame or SSM-32

frame.

The MEACs are

inserted in common

back slots in the main


service frame.

The corresponding

front board is the

ASU.

The MEAC

provides 32

IMA E1

interfaces.

32-port T1

ATM

Interface

Card (TAC)

Media gateway

32-port T1 ATM

Interface Card

(MTAC)

No

backup

The MTACs are used

in the SSM-256

frame, SSM-160

frame or SSM-32

frame.

The MTACs are

inserted in common



service frame.

The corresponding

front board is the

ASU.

The MTAC

provides 32

IMA T1

interfaces.

Backup

32-port

E1/T1 ATM

interface

card (BEA)

Media gateway

Network Backup

32-port E1/T1

ATM Interface

Card (MBEA)

No

backup

The MBEAs are used

in the SSM-256

frame or SSM-32

frame.

The MBEAs are

inserted in common



service frame.

The corresponding

front board is the

ASU.

The BEA

provides

backup

functions for

the EAC/TAC.

UMG8900 V200R009C02

Product Description



Page 42 of 67

Table 3-5 Media resource processing units



Logical Board

Physical Board

Voice

Processing

Unit (VPU)

Media gateway

Voice Processing

Unit B (MVPB)

Load

sharing

The MVPBs are used

in the SSM-256

frame.

The MVPBs are

inserted in common

front slots.

No corresponding

back board is

required.

The VPU

works with

voice

subboards. The

VPU provides

the transcoding

and EC

functions for

voice service

streams.

The VPU

provides

announcement

playing

resources to

implement the

digit-collecting

and

announcement-

playing

services.

Media gateway

Voice Processing

Unit D (MVPD)

Load

sharing

The MVPDs are used

Documents

Huawei Mobile Softswitch Product Description