UMG8900.docx

System Description of UMG8900
Huawei Technologies Co., Ltd.

SYSTEM DESCRIPTION OF UMG8900
HUAWEI CONFIDENTIAL I
Table of Contents
Chapter 1 Introduction......................................................................................................................1
1.1 Orientation .............................................................................................................................1
1.2 Features.................................................................................................................................1
1.2.1 Powerful Service Capability ........................................................................................2
1.2.2 Networking Flexibility ..................................................................................................2
1.2.3 Packet and TDM Switch-Integrated Platform..............................................................2
1.2.4 Abundant Interfaces ....................................................................................................3
1.2.5 Voice Quality Assurance .............................................................................................3
1.2.6 Carrier-Class Reliability...............................................................................................3
1.2.7 Easy Installation and Maintenance .............................................................................4
1.2.8 High Clock precision....................................................................................................5
Chapter 2 System Architecture........................................................................................................6
2.1 Overview of System Architecture...........................................................................................6
2.2 Product Appearance ..............................................................................................................6
2.3 Hardware Architecture ...........................................................................................................8
2.4 Software Architecture.......................................................................................................... 10
2.4.1 Host Software........................................................................................................... 11
2.4.2 LMT Software............................................................................................................12
2.5 Board Introduction............................................................................................................... 12
Chapter 3 Service and Networking Application .......................................................................... 14
3.1 Overview of Service and Networking Application ............................................................... 14
3.2 Service Introduction ............................................................................................................ 14
3.2.1 Basic Bearer Service................................................................................................ 14
3.2.2 Multimedia Service................................................................................................... 14
3.2.3 Intelligent Service..................................................................................................... 14
3.2.4 QoS Insurance ..........................................................................................................15
3.2.5 Mobility Support........................................................................................................ 15
3.2.6 TrFO/TFO................................................................................................................. 15
3.2.7 Embedded Signaling Gateway Function.................................................................. 15
3.2.8 Other Services.......................................................................................................... 16
3.3 Networking Application ....................................................................................................... 16
3.3.1 Overview of Networking Application......................................................................... 16
3.3.2 GSM Networking .......................................................................................................16
3.3.3 UMTS R99 Networking..............................................................................................18
3.3.4 UMTS R4 Networking .............................................................................................. 19
3.3.5 Networking in IM Domain ......................................................................................... 20

HUAWEI CONFIDENTIAL II
Chapter 4 OAM System.................................................................................................................. 22
4.1 Overview of OAM System....................................................................................................22
4.2 System Structure ................................................................................................................ 22
4.2.1 LMT Management System ........................................................................................23
4.2.2 iManager2000 System ..............................................................................................24
4.2.3 MML Command Line.................................................................................................24
4.3 Function .............................................................................................................................. 25
4.3.1 Introduction to OAM Function ...................................................................................25
4.3.2 Device Management .................................................................................................25
4.3.3 Data Management.....................................................................................................25
4.3.4 Alarm Management...................................................................................................26
4.3.5 Tracing Management ................................................................................................26
4.3.6 Performance Management........................................................................................26
4.3.7 Environment and Power Supply Monitoring............................................................. 26
Chapter 5 Technical Parameter..................................................................................................... 27
5.1 Overview of Technical Parameter....................................................................................... 27
5.2 System Performance Parameters....................................................................................... 27
5.2.1 Service Processing Capability.................................................................................. 27
5.2.2 Platform Switching Capability................................................................................... 29
5.2.3 Reliability.................................................................................................................. 29
5.2.4 Voice Quality Parameter ...........................................................................................29
5.3 Technical Parameter of the Whole System ........................................................................ 30
5.3.1 Power Supply and Consumption...............................................................................30
5.3.2 Mechanical Data....................................................................................................... 31
5.4 Environment Parameter...................................................................................................... 32
5.4.1 Storage Environment ................................................................................................32
5.4.2 Transportation Environment......................................................................................34
5.4.3 Running Environment............................................................................................... 36
Appendix A List of Acronyms and Abbreviations ............................................................. 39

HUAWEI CONFIDENTIAL 1
Chapter 1 Introduction
This chapter introduces the following topics about the Universal Media Gateway 8900
(MG8900):
 Orientation: briefs you on network applications.
 Features: introduces main features.
By reading this chapter, you can get an overview of applications and features of the
UMG8900.
1.1 Orientation
The UMG8900 is a MGW developed by Huawei Technologies, Co., Ltd (hereafter
referred as Huawei) according to 3GPP R4 specifications. It is engaged in bearing
voice, multimedia and narrowband data (within 64 kbit/s) and in converting between
different service stream formats.
As the MGW, the UMG8900 interacts with a (G)MSC Server through H.248 protocol.
The (G)MSC Sever can be Huawei MSOFTX3000 or an MGC of other vendors.
In mobile networks, the UMG8900 provides:
 Transport and forwarding of voice and circuit-switched (CS) data;
 Conversion of CS service stream formats of mobile access networks to public CS
networks (such as PSTN and ISDN), to other mobile networks (such as GSM and
CDMA) or to packet networks;
 Packet switching, which is essential for evolvement from mobile networks to all-IP
networks (by means of upgrade).
The UMG8900 is designed to serve as:
 MGW in the UMTS R4 core network
 UMTS R99 VMSC/TMSC/GMSC together with the MSOFTX3000
 GSM VMSC/GMSC together with the MSOFTX3000
 IM-MGW in the UMTS R5 core network
The NGN trend is the integration of mobile and fixed networks, and the integration of
core networks is the first step. The UMG8900, through being upgraded, is able to act as
the MGW for the integrated mobile and fixed network to provide a uniform access and
transport platform.
1.2 Features
The UMG8900 has the following features.

1.2.1 Powerful Service Capability
The UMG8900, by networking with the MSOFTX3000, provides basic services,
supplementary services and intelligent services.
The UMG8900 supports:
 Basic tone services, eight ARM codec types, G.711 codec type and G.711 over IP
 Voice quality assurance mechanisms such as dynamic codec type selection, echo
cancellation (EC), silence detection and comfortable noise generation
 Tone playing, digit collection, dynamic loading of tone files, and intelligent tones
playing
 Interworking functions (IWF) through the attached shared IWF (SIWF) device
including fax, synchronous data bearer, asynchronous data bearer and so on
 Embedded signaling gateway function: adapts and forwards signaling of GSM
access networks or PSTN to packet core networks based on M2UA/M3UA;
receives MTP3B messages, adapts and forwards these signaling based on M3UA
 Dual homing functions so that the UMG8900 can switch to the slave
MSOFTX3000 in the event of the master failure
1.2.2 Networking Flexibility
The UMG8900, developed in the soft switch architecture, is not only compatible with
TDM switching networks but also able to push TDM networks to evolve towards IP
packet switching networks.
The UMG8900 interacts with the soft switch device MSOFTX3000 through H.248
protocol. They together serve as VMSC/TMSC/GMSC of UMTS R99 core networks or
VMSC/TMSC/GMSC of GSM core networks.
1.2.3 Packet and TDM Switch-Integrated Platform
The UMG8900 hardware platform is designed to support both TDM narrowband
switching services and IP/ATM packet switching services.
Service streams and control streams are processed by different packet switching units,
where the maximum switching capability of service and control streams reach 128
Gbit/s and 256 k respectively. Either service or control data are forwarded through two
separate channels in 1 + 1 backup mode to avoid single point failure.
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-IP networks smoothly through software upgrade instead of hardware replacement
so as to protect investment.

1.2.4 Abundant Interfaces
The interfaces of the UMG8900 include:
 TDM interfaces: E1/T1 and STM-1 SDH/SONET (electrical interfaces, single-
mode and multimode optical interfaces)
 ATM interfaces: STM-1 ATM (single-mode and multimode optical interfaces),
E1/T1 IMA
 IP interfaces: FE (10/100 auto-sensing Ethernet electrical interfaces), GE
(single-mode and multimode fiber interfaces), STM-1 POS (single-mode and
multimode fiber interfaces) and STM-4 POS (single-mode and multimode fiber
interfaces)
 Clock interfaces: 8 kHz line clock, 2048 kHz/2048 kbit/s Building Integrated Timing
Supply System (BITS) clock and Global Positioning System/ Global Navigation
Satellite System (GPS/GLONASS) clock
 Maintenance interfaces: RS232, FE (10/100 auto-sensing Ethernet electrical
interfaces) and RS485
The UMG8900 supports small form factor plugable (SFP) optical modules. The STM-1
SDH/SONET, STM-1 ATM and STM-1/4 POS interfaces can be configured with
different optical modules in different applications.
1.2.5 Voice Quality Assurance
In IP networks, the factors lowering voice quality include delay, jitter, packets loss and
echo.
The UMG8900 decreases delay and jitter through dynamic jitter buffer technique,
reduces packet loss rate through packet loss compensation technique, and cancels
echo through echo cancellers. Furthermore, the UMG8900 improves voice quality
through silence detection and comfort noise generation techniques.
The UMG8900 prioritizes IP packets service streams and transports the service
streams in higher priorities first, thus improving transport reliability.
The voice quality specifications of the UMG8900 are all better than industrial standards.
For specific specifications, see Chapter 5 Technical Parameter.
1.2.6 Carrier-Class Reliability
The UMG8900 reliability is ensured through the following mechanisms or designs.
 Distributed independent clock system and modularized software and hardware.
Thus, one module failure does not affect the working of other modules.
 Backup and service protection mechanisms to avoid single-point failure. In the
UMG8900, service boards work in 1 + 1 backup mode, interface boards in 1 + 1 or
N + 1 backup mode, and resource boards in load sharing and resource pool mode.

 Core switching unit protection. The core switching unit is designed with dual-plane
structure and outgoing packet error detection and selection techniques.
 Master/slave channels for internal communication, thus avoiding single point
failure.
 Redundant fans with intelligent control and alarm functions, and redundant power
supply systems providing dual-channel power supply and real-time monitor and
alarm.
 Service security mechanisms such as user right assignment, command group
management, firewall, encryption key, authentication and IP Security (IPSec).
 Multiple alarm reporting and handling ways. The UMG8900 can report alarms
timely through panel indicators and alarm boxes, report alarms in a centralized
way through a network management system, and allow you to handle alarms
through the Local Maintenance Terminal (LMT) and the iManager Network
Management System (hereinafter referred to iManager).
1.2.7 Easy Installation and Maintenance
Due to the following design, the UMG8900 features easy installation:
 The UMG8900 is installed in the standard 19-inch cabinet.
 Each functional module provides standard external interfaces with clear labels.
 Boards are plugged in front and back slots on backplanes in pair and all cables
lead out from the rear cabinet for the convenience of equipment installation and
cable distribution.
 As standardized joints are used, there is no need for special tools in equipment
mounting.
Thanks to the following design, the UMG8900 features easy maintenance:
 Board hot swap in the event of board failure. You can learn the work status of a
board through the indicator on the board.
 Local and remote maintenance by means of the Operation & Maintenance System,
iManager and Telnet.
 On-line report, load and patch installation of hardware and software, which entail
software upgrade and maintenance without affecting system operation.
 Version consistency check, version authentication of front administration module
(FAM) and back administration module (BAM) and version roll back.
 Logs, alarms, traffic statistics and fault diagnosis functions, facilitating fault
location and troubleshooting.
 Alarm box function, displaying alarm information in a visual way and notifying
alarms to you by way of telephones or short messages.

1.2.8 High Clock precision
The UMG8900 offers a clock unit (CLK) responsible for clock provision. The CLK,
working in master/slave mode, can extracts 8 kHz link clock, 2048 kHZ/2048 kbit/s
BITS clock and GPS/GLONASS clock. It provides stratum two and three clock for
different networking needs.

Chapter 2 System Architecture
2.1 Overview of System Architecture
This chapter covers the following topics:
 Product appearance
 Hardware architecture: describes product appearance and logical architecture,
including functional modules and physical boards evolved.
 Software architecture: describes module components and their functions.
 Typical configuration: provides typical configuration examples to help with your
configuration.
For details, refer to the following description.
2.2 Product Appearance
The UMG8900 is installed in the standard 19-inch cabinet—N86-22 of Huawei, which
supports flexible configuration to meet the requirements of different capacities and
networking applications. In the presence of small-capacity networking application, the
UMG8900 can be configured with one frame; in the presence of large-capacity
networking application, it can be configured with multiple cascaded frames.
An N68-22 cabinet has a 46U inside space (1U = 44.45 mm= 1.75 inches) and
comprises a power distribution frame, three semi-integrated frames, two air deflectors,
a cabling channel, multiple dummy panels, a rack, multiple guide rails and one or more
fiber coilers. It is supplied with -48V DC power. It conforms to IEC297 standards, and
meets the requirement for flexible module configuration.
In the presence of a single cabinet, the front view of an N68-22 cabinet is shown in
Figure 2-1.

Figure 2-1 Cabinet front view (single cabinet)
The UMG8900 contains a maximum of three cabinets and nine cascaded frames.
In the case of single frame, the single service frame is placed in the middle of a cabinet.
The front view of a frame is shown in Figure 2-2.

E32/
T32
S2L/
S2E
TAC
E8T/G1O/
P1H/P4L
Figure 2-2 Frame front view
2.3 Hardware Architecture
The UMG8900 consists of the hardware functional modules as shown in Figure 2-3.
LMT/iManager MGC(SoftX3000)
Operation &
maintenance
subsystem
OMU/MPU
Packet
Switch
Gateway
control
subsystem
Packet service
process subsystem
ATM
IP
A4L/EAC/
A4L/EAC/
TAC
ASU
RPU
TCU
Service
resource
subsystem
Clock
subsystem
Cacsading
subsystem
TDM
TDM service process
subsystem
Signaling
forward
subsystem
Figure 2-3 UMG8900 hardware architecture
The UMG8900 is engaged in IP/ATM/TDM bearer service access and process, media
gateway control, media resource process, signaling adaptation and transparent
E32/
T32
SPF
TNU/TCLU
S2L/
S2E
BLU/FLU/
BKP
E8T/G1O/
P1H/P4L
CLK
NET
CMU
PPU
MBUS

transmission, device management and maintenance, clock and cascading
management.
According to functions and distributed modules, the device hardware system can be
divided as follows.
I. Operation & Maintenance Subsystem
Its function is to manage and maintain the entire device through the BAM built in the
operation & management unit (OMU) together with the LMT. The LMT can be deployed
on a common PC, which is delivered along with the UMG8900. There are two types of
boards in the operation and maintenance subsystem: OMU and main processing unit
(MPU). The OMU is targeted to manage the entire device; while the MPU is to manage
the local frame. The physical boards in this subsystem are the mobile network OMU
(MOMU) and mobile network MPU (MMPU).
II. Gateway Control Subsystem
Its function is to exchange media gateway control messages with an MGC device to
invoke and manage resources of the UMG8900. The subsystem includes the protocol
processing unit (PPU) and the connection maintenance unit (CMU). The physical board
of the PPU is the mobile network back protocol processing unit (MPPB), and the
physical boards of the CMU are the mobile network front/back connection maintenance
units (MCMF and MCMB). The PPU is responsible for implementing H.248 protocol
stack, and the CMU is for resolving H.248 messages, setting up service bearers and
managing resources.
III. Packet Service Process Subsystem
Its function is to provide hardware interfaces and modules and deal with packet service
bearers. The UMG8900 provides two types of packet service bearer modes, namely, IP
and ATM. Its hardware mainly includes RTP processing unit (RPU), 8-port 10/100M
Ethernet interface board (E8T), backup E8T (BFE), one-port gigabit Ethernet single-
mode fiber interface board (E1G), backup E1G (BGE), one-port STM-4 POS optical
interface board (P1H), 4-port STM-1 POS optical interface board (P4L), ATM and
POS backup board (BAP), packet switch unit (NET), ATM adaptation layer 2/5
(AAL2/AAL5), SAR processing unit (ASU), 4-port STM-1 ATM single mode fiber
interface board (A4L), 32-port E1/T1 ATM interface card (EAC), 32-port T1 ATM
interface card (TAC) and backup 32-port E1/T1 ATM interface card (BEA). The
corresponding physical boards are MRP, ME8T, MG1O, MP1H, MBAP, MNET, MASU,
MA4L, MEAC, MTAC and MBEA.
IV. TDM Service Process Subsystem
Its function is to provide TDM switching modules and TDM interfaces to process TDM
signals, thus achieving interconnection with TDM networks such as PSTN. The

hardware includes TDM central switching net unit (TNU), TDM convergence & link unit
(TCLU), 32E1 ports TDM interface board (E32), 32T1 port TDM interface board (T32)
and 2 × 155M SDH single-mode fiber interface board (S2L). The corresponding
physical boards are MTNU, TCLU, ME32, MT32, MS2E and MS2L.
V. Service Resource Subsystem
Its function is to provide resources for media stream format conversion and service
proceeding. Its hardware includes TransCode unit (TCU), echo canceller unit (ECU)
and shared resource unit (SRU). The corresponding physical boards are MTCB, MECU
and MSRU
VI. Signaling Forward Subsystem
Its function is to work with the gateway control subsystem, operation & maintenance
subsystem and TDM service process subsystem to implement signaling adaptation and
forwarding when the UMG8900 connects a GSM access network. Its hardware
includes the front signalling processing unit (SPF), and the corresponding physical
board is MSPF.
VII. Clock Subsystem
Its function is to provide clock signals input and output for the entire system and to
complete clock phase lock and synchronization. Its hardware includes the clock unit
(CLK) board, responsible for clock extraction and access. The corresponding physical
board is MCLK.
VIII. Cascading Subsystem
Its function is to cascade packet, TDM and control service flows in the presence of
multiple frames cascaded. The hardware includes back link unit (BLU) and front link
unit (FLU). The corresponding physical boards are MBLU and MFLU.
2.4 Software Architecture
The UMG8900 includes two software parts: host software and the LMT software, as
shown in Figure 2-4.
Host
software
BAM LMT
Figure 2-4 Software architecture

Service resource
process module
Hardware platform
Underlying support software
Packet
service
process
module
Operation &
maintenance
module
Gateway
control
module
Host software includes BAM and service application software. The LMT software
communicates with the host by way of the BAM.
2.4.1 Host Software
The structure of the host software is shown as Figure 2-5.
Signaling
process
Narrowband
module service
process
module
Figure 2-5 Host software structure
The host software includes underlying support software module, narrowband service
process module, packet service process module, signaling process module, service
resource process module, gateway control process module and operation and
maintenance module.
I. Underlying Support Software Module
Its function is to serves as support for upper-layer applications such as system process,
system interruption, memory management and memory assignment. The underlying
support software is developed based on the Vxworks real-time operating system and
Huawei Distributed Object-Oriented Programmable Realtime Architecture (Dopra) and
Versatile Routing Platform (VRP).
II. Narrowband Service Process Module
Its function is to access TDM bearer services and connect timeslots under the control of
the gateway control module; implement signaling gateway functions and play
announcement by working with the signaling process module and service resource
process module.

III. Packet Servcie Process Module
Its function is to access and handle IP and ATM packet services under the control of the
media control module; fulfill the embedded signaling gateway functions by working with
the signaling gateway process module.
IV. Signaling Process Module
Its function is to adapt and resolve signaling, implement signaling adaptation
conversion and manage signaling links.
V. Servcie Resource Process Module
Its function is to process service resources, including voice codecs conversion, tone
signals detection and report.
VI. Gatway Control Module
Its function is to translate H.248 protocol to the handling of internal resources by
communicating with an MGC device. This module is the core control unit of the
UMG8900.
VII. Operation and Maintennance Module
Its function is to provide external interfaces for device operation and maintenance.
2.4.2 LMT Software
The LMT software can be installed to an ordinary PC. Through the LMT, users perform
operation and management on the UMG8900.
The LMT system consists of four parts: Operation & Maintenance System, Alarm
Management System, Performance Management System and Traceviewer.
2.5 Board Introduction
The UMG8900 boards are classified into logical boards and physical boards. One type
of logical boards includes one or more physical boards with the same or similar
functions.
Table 2-1 lists some major boards and their functions.
Table 2-1 Major boards and functions
Logical board Physical board Function
OMU MOMU Operating and maintaining the entire device
MPU
MMPU Managing the boards of the local frame, operating as the
OMU directs
NET MNET Provide packet service switching function

Logical board Physical board Function
TNU MTNU Providing TDM service switching function
TCLU TCLU Cascading TDM service frames
PPU MPPB Implementing H.248 protocol
CMU
MCMB/MCMF Handling service resources. With the same functions, the
MCMF is the front board and the MCMB is the back one.
CLK MCLK Providing clock signals.
ASU
MASU Segmenting and assembling ATM services, and
accessing ATM services through the back ATM interface
board
RPU
MRPU Adapting IP services, and accessing IP service through
the back IP packet interface board
TCU
MTCB Voice codecs conversion, EC, tone playing, audio mixing
and so on
SPF
MSPF Adapting signaling from TDM side to IP side based on
such adaptation protocols as M2UA, M3UA, V5UA and
IUA.
Besides the boards listed above, the UMG8900 provides TDM interface boards (such
as E32, T32 and S2L), IP packet interface boards (such as E8T, E1G, P4L and P1H),
and ATM interface boards (such as A4L, EAC and TAC), service resource boards (such
as SRU and ECU). Among the service resource boards, the SRU is responsible for
tone playing, digit collection and audio mixing, and the ECE is for audio mixing only. All
the functions, however, can also be provided by the TCU.

Chapter 3 Service and Networking Application
3.1 Overview of Service and Networking Application
This chapter introduces the services and networking applications supported by the
UMG8900, as well as devices involved.
3.2 Service Introduction
The UNG8900 is engaged in processing and converting IP/ATM/TDM media streams.
When serving as the MSC in a core network CS domain together with the
MSOFTX3000, the UMG8900 supports abundant 3G services.
3.2.1 Basic Bearer Service
Voice services include broadband and narrowband voice services. Broadband voice is
represented in adaptive multi-rate (AMR) format supporting multiple codec rates.
Narrowband voice, the traditional TDM voice, is a type of CS service. Voice services
can also be classified to ordinary telephone and emergent telephone services.
The CS domain bearer services provided by the UMG8900 include:
 G.711 voice services and AMR voice services in the rates of 12.2 kbit/s, 10.2 kbit/s,
7.95 kbit/s, 7.4 kbit/s, 6.7 kbit/s, 5.9 kbit/s, 5.15 kbit/s and 4.75 kbit/s
 Data transparent transmission in the rates of 64 kbit/s, 32 kbit/s and 28.8 k bit/s
 Non-transparent data services in the rates of 57.6 kbit/s, 28.8 kbit/s and14.4 kbit/s
 G.711 services over IP
3.2.2 Multimedia Service
As the CS domain device of a core network, the UMG8900 can provide real-time
multimedia services of the CS domain.
The UMG8900 supports codecs adaptation of multimedia services in accordance with
3G-324M, and provides mobile video services together with other devices.
The UMG8900 supports 3G-324M services over IP/ATM/TDM.
3.2.3 Intelligent Service
The UMG8900 can only provide announcement resources and service bearer channels
by itself. However, by working with intelligent devices and the MSOFTX3000, it can
provide intelligent services over the CS domain.

3.2.4 QoS Insurance
The UMG8900 focuses on provisioning real-time voice services in a UMTS network.
For voice services, some requirements on quality of service (QoS) must be satisfied.
The UMG8900 provides the following measures to insure voice quality:
 Supporting IP differentiated services (IP DiffServ), IP tag of service (IP TOS) and
differentiated services CodePoint (IP DSCP)
 Supporting upstream priority queue, and treating services differently
3.2.5 Mobility Support
The UMG8900 supports the modifying and handover of bearer resources to satisfy the
demands for service streams conversion and different networks interconnection.
The UMG8900 provides highly mobility by supporting IP/ATM/TDM bearer resources,
voice codecs conversion, and the modifying and handover of internal bearer channels.
The device supports the following handover:
 Inter-exchange, intra-exchange and subsequent handover for UMTS networks
 Inter-exchange, intra-exchange and subsequent handover for GSM networks
 Inter-exchange and subsequent handover from UMTS to GSM networks
 Inter-exchange and subsequent handover from GSM to UMTS networks
3.2.6 TrFO/TFO
The UMG8900 supports TransCode free operation (TrFO) and TFO of a UMTS network
to improve voice quality.
TrFO: TransCode free operation. It improves voice quality because no TransCoder (TC)
exists in any physical path, and codecs conversion and other TC related operations are
all unnecessary. This function is defined in 3GPP R4 specifications.
TFO: TransCode free operation. It is configured for the TCs both supporting TFO. If the
codec types of two TCs are matched, this function enables in-band negotiation about
codec selection instead of codecs conversion, thus improving voice quality. This
function is defined in 3GPP GSM, R99 and R4 specifications.
3.2.7 Embedded Signaling Gateway Function
The UMG8900 is embedded with signaling gateway functions so that it supports
signaling adaptation and forward of UMTS access networks and external PSTN.
For the RANAP signaling, the UMG8900 accesses it from UMTS networks through
RANAP, SCCP, MTP-3b, SAAL and ATM, and forwards it to the MOSFTX3000 through
RANAP, SCCP, M3UA, SCTP and IP.

For the SS7 signaling from PSTN, the UMG8900 accesses it through SS7, MTP3 and
MTP2, and forwards it to the MSOFX3000 through SS7, M3UA and SCTP.
3.2.8 Other Services
The UMG8900 is designed in bearer independent call control (BICC) structure as
defined in R4 specifications. Together with the MSOFTX3000, the UMG8900 can
deliver 3G services such as multiparty service (MPTY), and those developed by
operators or the third party.
3.3 Networking Application
3.3.1 Overview of Networking Application
The UMG8900 must be integrated with a (G)MSC Server in order to implement
(G)MSC functions of a mobile core network. With the BICC structure, the UMG8900
supports flexible networking modes and interconnection with existing networks.
The UMG8900 supports the following networking applications:
 Serving as the (G)MSC with a (G)MSC Server in a GSM core network
 Serving as the bearer equipment and networking with a (G)MSC Server in a
UMTS R99 network
 Serving as the bearer device in a UMTS R4 network
 Networking in IM domain.
The next sections describe the networking modes listed above. The MSOFTX3000
developed by Huawei is selected as (G)MSC Server.
3.3.2 GSM Networking
In the present mobile networks, GSM network equipments are mainly responsible for
voice services provision. To realize network smooth upgrade without affecting the
current network development, the UMG8900, networking with the MSOFTX3000,
provides (G)MSC functions of GSM networks, as shown in Figure 3-1.

UMG8900 UMG8900
LE: Local Exchange BSS: Base Station Subsystem
Figure 3-1 GSM networking
In this networking mode, the UMG8900 and the MSOFTX300 function as the (G)MSC
in the GSM network. Therefore, only the combination of the two devices can provide all
interfaces for GSM service. The two devices are connected by internal interfaces or
standard Mc interfaces.
In a GSM network, TDM connections exist between MSC devices in a core network,
between the MSC of core network and the BSC of access network, and between
access network and PSTN.
When the UMG8900 and MSOFTX3000 together function as the device of the GSM
gateway exchange, the UMG8900 accesses voice streams from external networks
(PSTN, for example) through TDM interfaces. For signaling, it can be sent to the
MSOFX3000 directly through the connections to the MSOFX3000, or be forwarded to
the MSOFTX3000 through the signaling gateway function built in the UMG8900 or
through the TDM semi-permanent connections of the UMG8900. The signaling
includes BSSAP call control signaling of the access network and the signaling between
MSC devices of the core network.
For the voice streams of the access network, the UMG8900 transfers them to the core
network in TDM mode. For the voice streams of the core network, they can be
transferred between devices in the core network through the existing TDM network or
Voice over IP (VoIP) functions of the UMG8900.
The UMG8900 provides complete signaling gateway functions, by which, the
UMG8900 can forward the signaling of the access network and SS7 signaling of PSTN
based on M2UA and M3UA.
BSC
MSOFTX300
0
BSSAP
MSOFTX300
0
No.7
SG
BSS2
BSSAP Mc Mc LE
BSC
PSTN
TDM
TDM
BSS1
TDM
MSC/GMSC

3.3.18 UMTS R99
Networking
RNC MSOFTX3000
RANAP
MSOFTX3000
ISUP
SG
RAN
LE
Iu UP RANAP Mc Mc
PSTN
RNC
TDM
TDM
Iu UP
RAN MSC/GMSC
After GSM mobile networks evolves to UMTS R99 networks, in access works
connection modes and service types change a lot, but in core networks the
combination of the UMG8900 and the MSOFT3000 is still used in the CS domain
serving as (G)MSC, as shown in Figure 3-2.
UMG8900 UMG8900
Figure 3-2 UMTS R99 networking
In UMTS R99 networks, the access and core networks are connected by ATM
connections through lu interfaces. The user plane (UP) transmits voice and
narrowband data based on lu UP, the control plane (CP) transmits call control
messages based on lu CP. However, TDM connections still exist between MSC devices
in the core network, and between the core network and PSTN.
The UMG8900 and MSOFTX3000 function as one (G)MSC in the core network. The
UMG8900 can communicate with the MSOFTX3000 either through internal interfaces
or through standard H.248 messages.
In this networking mode, the UMG8900 accesses service flows through Iu interfaces.
The control signaling from an access network can reach the MSOFTX3000 directly or
be forwarded to the MSOFX3000 through the signaling gateway function built in the
UMG8900.
For the signaling of the access network, the UMG8900 adapts it based on MTP3B and
M3UA. For the signaling between MSC devices or between the core network and
PSTN, the UMG98900 adapts it based on M2UA and M3UA.
As the UMG8900 is designed in BICC structure and supports TDM/IP/ATM bearer
modes, it can help the UMTS R99 network evolve into a UMTS R4/R5/R6 network
smoothly.

3.3.4 UMTS R4 Networking
A UMTS R4 network is designed in the BICC structure so that new services can be
easily applied. The core network adopts packet bearer mode, which occupies less
bandwidth. Figure 3-3 shows a UMTS R4 network.
RAN
RNC MSOFTX3000
RANAP Nc
RANAP
Mc
MSOFTX3000
Mc
SG
No.7
LE
Iu UP
TDM
PSTN
RAN Iu UP
UMG8900
Nb
UMG8900
Figure 3-3 UMTS R4 application
Compared with the UMTS R99 network, the UMTS R4 network has the same access
network, but different core network. The core network of the UMTS R4 employs packet
connections to connect MWG and (G)MSC Server, MGW and MGW through standard
Mc and Nb interfaces.
As the MGW in the UMTS R4 core network, the UMG8900 is responsible for service
bearer and bearer control of the CS domain.
The UMG8900 can also be applied to GMSC where it acts as a 3G gateway exchange
equipment to connect PSTN. Between the UMG8900 and the PSTN are connected in
TDM mode. The signaling proceeding between them is implemented either by the
signaling gateway embedded in the UMG8900 or an independent signaling gateway.
Interfaces in the UMTS R4 network are described in Table 3-1.
Table 3-1 Interfaces in the UMTS R4 network
Interface Function Bearer mode Protocol
lu
Connect RNC and the UMG8900 to transmit
service flows
ATM lu Up
Mc
Connect the UMG8900 and MSOFTX3000 to
control and manage the UMG8900
IP H.248
Nb Connect two UMG8900 devices to establish IP/ATM/TDM RTP/RTCP, Nb
UP, IPBCP (for IP

CSCF SoftX3000
TUP/ISUP
Gi
Iu TDM
RNC
Gi
PSTN
SGSN GGSN UMG8900
Interface Function Bearer mode Protocol
bearers and channels for service flows bearer mode)
Nc
Connect two MSOFTX3000 devices to select call
routes and establish channels for IPBCP
negotiation
3.3.5 Networking in IM Domain
For future 3G R5 IM domain networks, interworking between users of 3G IM domain
and those of PSTN domain or PLMN of 2G, 3G R99, 3G R4 can be implemented via
UMG8900 (as GMSC). UMG8900 can perform this function through upgrade, which
make an important functional unit of IM domain.
1) Support interworking with PSTN domain
Figure 3-4 Combination networking of UMG8900 and PSTN
On the above network (as shown in Figure 3-44), interworking between MGCF
(SoftX3000) and CSCF is implemented via SIP signaling. Connection between
UMG8900 and MGCF supports the fixed network protocol H.248. Real-time
transmission of voice between UMG8900 and GGSN is implemented via RTP/RTCP.
Connection between UMG8900 and PSTN is borne by TDM and PSTN signaling is
usually processed by signaling gateway.
2) Support interworking with PLMN
PLMN networks need to interwork with UMG8900 include 2G, 3G R99 and 3G R4
networks, when MGCF and UMG8900 should be used to perform transformation.
Combination networking of UMG8900 of 3G R4 CS domain and 2G or 3G R99 is
described above, which is not covered here in more detail.

Figure 3-5 Combination networking of UMG8900 and PLMN
On the above networking (as shown in Figure 3-55), real-time transmission of voice
between UMG8900 and GGSN is also implemented via RTP/RTCP. If the bearer
control protocols adopted by RNC and GGSN are different, UMG8900 will perform
conversion function on different bearers.
CSCF SoftX3000
RANAP
Gi
Iu TDM
RNC
Gi
SGSN GGSN UMG8900

M2000 Server M2000 WS
UMG8900
LAN
Router
Local Maintenance
Internet
LMT
Remote Maintenance
LMT
Modem
PSTN
Chapter 4 OAM System
4.1 Overview of OAM System
Device operation and maintenance (OAM) is the basic function of a telecommunication
device. This chapter introduces the functions and structure of the UMG8900 OAM
system.
4.2 System Structure
The OAM system of the UMG8900 enables convenient device operation and
maintenance and thus ensures device reliability.
The UMG8900 OAM system is shown in Figure 4-1.
Figure 4-1 UMG8900 OAM system
The OMA system is designed based on the client/server structure. The UMG8900 host
acts as the server and the LMT as the client. The LMT is responsible for management
and maintenance on the UMG8900, local or remote.
The UMG8900 provides interfaces to Huawei iManager2000 integrated network
management system (hereafter referred to iManager2000), which can implement
central management on all devices in the network. The iManager2000 consists of one
iManager2000 server and multiple iManager2000 work stations.

LMT
UMG8900
OM
U
OM
U
NE
T
NE
T
LanSwitch
4.2.1 LMT Management System
With graphic user interfaces (GUI), the LMT offers the following functions:
 Device configuration and management
 Service maintenance
 Performance statistics
 Service tracing
 Security management
 Troubleshooting.
The LMT and the BAM of the OMU are connected in a standard client/server structure.
The BAM supports device management and provides interfaces for management.
Because the BAM applies the industry-popular real-time and distribution operation
system, service processing capability is greatly improved. The BAM connects and
manages other functional units through the FAM.
The LMT provides friendly GUI and abundant online help information. At the LMT, you
can check command meaning and parameter description when using commands. In
addition, you can view alarm information, including alarm meaning, handling
suggestions and so on.
The LMT can manage multiple UMG8900 devices simultaneously. It provides external
alarm boxes to report alarms with voice and optical signals. It can also send short
messages to notify alarm information to maintenance technicians
To insure reliable connection between the LMT and the UMG8900, dual planes design
is used, as shown in Figure 4-2.
Figure 4-2 Dual planes network
The master and slave OMUs of the UMG8900 are both connected to the LAN Switch
through standard cables. The LMT system communicates with the UMG8900 host also
through the LAN Switch. During communication, only the master OMU functions. When

the master board fails, the slave OMU becomes active and connects to the LMT. The
master and slave OMUs provide only one IP address, namely, operation and
maintenance center (OMC) interface for the outside.
 Note:
The back NET accommodates the OMC interface so as to meet the requirement for back cabling.
4.2.2 iManager2000 System
The iManager2000 is a mobile network management system developed by Huawei,
used for managing all devices in a mobile network. The LMT can be integrated into the
iManager2000. The iManager2000 communicates with the UMG8900 host based on
TCP/IP.
The integrated network management system makes it easy for alarm handling, routine
operation, performance management and information query in a centralized way.
The iManager2000 system includes a server and one or more work stations. The LMT
is loosely coupled with the iManager2000. The LMT is dedicated to management on the
UMG8900 while the iManager2000 is responsible for public management on all
devices such as topology management and troubleshooting.
4.2.3 MML Command Line
The system provides not only GUI but also MML commands for device operation and
maintenance. The MML commands can be used for data configuration, routine
operation and device maintenance.
MML is an interface for interaction between machine and man, which is defined in ITU
Z.301-Z.341 series. Using MML commands, you can monitor and manage the
UMG8900 in detail.
MML has the following features:
 Encapsulation: A function instead of a simple operation is encapsulated to an
MML command. For example, adding an IP address needs several steps, but can
be completed by an MML command which groups those steps. This feature
inevitably improves efficiency.
 Consistency check: When an MML command is run, data consistency between
tables is checked to prevent rubbish data.
 Base API: MML commands function as the lower layer application program
interface (API) with all other applications running based on it. The GUI terminal
translates interface operations into commands and then transmits them to the

MML system. The MML system runs the command and returns results in text,
which are transformed to another format suitable for display in GUI. In this way,
the system stability is ensured as the system running will not be affected by
program problem.
 Interactive: The input and output of MML system are based on pure character
string. This feature enables the host to interwork with Telnet alike, and the client
terminal to run on multiple platforms (such as the dumb terminal without
processing capability). Therefore, MML meets the requirement of central network
management and the tendency of telecommunication products.
With the MML system, you can select and re-run a history command and invoke a
command by inputting key words.
The MML system provides parameter range when you input a command, and draw-
down combo boxes or check lists for your selection convenience.
4.3 Function
4.3.1 Introduction to OAM Function
The UMG8900 provides GUI for fulfilling OMA functions. OMA functions include device
management, data management, alarm management, tracing management,
performance management, and environment and power supply monitoring.
4.3.2 Device Management
In the graphical interface, you can view device configurations, board cascading
situation, board status and power distribution status. Through right-mouse menu
operations, you can query, display, switch, reset, isolate, block and activate boards and
interfaces.
Though graphical interface and MML commands, you can manage hardware, system
resources, signaling links, clock system and physical ports of the UMG8900.
4.3.3 Data Management
The function is to manage all data of the UMG8900 such as configuration data and
operating data.
The configuring data include service configuration and local exchange configuration
data. You can save, dump, and restore these data.
During the system running, the following data are generated such as alarms, logs,
performance statistics and tracing results. The system dumps and backs up them in
real time for fault location and network upgrade use.

4.3.4 Alarm Management
The function is to receive and deal with alarms. According to the alarm type and level,
the alarm terminal (for example, an alarm box or the alarm management system)
delivers the corresponding voice and optical signals, and sends the translated alarm
information to the network management through. In addition, the function also enables
to save alarm information, display history alarm records and set alarm processing way.
4.3.5 Tracing Management
The function is to provide service tracing, signaling tracing, interface tracing and
message explanation. It also performs real time tracing on service resources and
interface protocols in terms of process, status migration, resource occupation and
control information flow. The above information can be stored for fault locating and
fixing purpose.
4.3.6 Performance Management
The function is to make statistics on calls to provide reference for device status analysis
and telecommunications network plan, design, and maintenance.
The system provides abundant performance measurements. You can define lots of
measure tasks by setting different measure objects, measure sets, measure units and
measure items and measure time.
4.3.7 Environment and Power Supply Monitoring
 The function is to monitor and control the environment, power supply and other
intelligent devices in the central or remote equipment room even when no one is
on duty.

Chapter 5 Technical Parameter
5.1 Overview of Technical Parameter
This chapter introduces technical parameters of the UMG8900, including system
performance parameter, technical parameters of the whole device and environment
parameters.
5.2 System Performance Parameters
5.2.1 Service Processing Capability
I. GSM/UMTS End Exchange
The service processing capability of GSM/UMTS end exchange is shown in Table 5-1.
Table 5-1 Service processing capability of GSM/UMTS end exchange
Item Networking mode Index
Users amount R4 (IP/ATM core network) Single frame: up to 480,000
The whole system: up to 1.8 million
R99 E1 interface: up to 300,000 for a single frame, up
to 1.8 million for the whole system
STM-1 SDH interface: up to 360,000 for a single
frame, up to 1.8 million for the whole system
GSM E1 interface: up to 150,000 for a single frame, up
to 1.8 million for the whole system
STM-1 SDH interface: up to 480,000 for a single
frame, up to 1.8 million for the whole system
Traffic volume 45 kErlang
BHCA 2700 k
II. GSM/UMTS Gateway Exchange
The service processing capability of GSM/UMTS gateway exchange is shown in Table
5-2.

Table 5-2 Service processing capability of GSM/UMTS gateway exchange
Trunks
amount
R4 (IP/ATM core
network)
E1 interface: up to 12 k equivalent trunk for a single frame, up to
112 k for the whole system
STM-1 SDH interface: up to 20 k equivalent trunk for a single frame,
up to 140 k for the whole system
R99 E1 interface: up to 8 k equivalent trunk for a single frame, up to 56 k
for the whole system
GSM E1 interface: up to 8 k equivalent trunk for a single frame, up to 56 k
for the whole system
BHCA 5400 k
 Note:
Equivalent trunk is equal to TDM trunk plus IP equivalent trunk.
III. TMSC Exchange (Upstream in IP/TDM Mode)
The service processing capability of TMSC exchange (upstream in IP/TDM mode) is
shown in Table 5-3.
Table 5-3 Service processing capability of TMSC exchange (upstream in IP/TDM mode)
Trunks amount Upstream in IP mode E1 interface: up to 12 k equivalent trunk for a
single frame, up to 112 k for the whole system
STM-1 SDH interface: up to 20 k equivalent trunk
for a single frame, up to 140 k for the whole
system
Upstream in TDM mode E1 interface: up to 8 k equivalent trunk for a single
frame, up to 56 k for the whole system
STM-1 SDH interface: up to 32 k equivalent trunk
for a single frame, up to 220 k for the whole
system
BHCA 5400 k

5.2.2 Platform Switching Capability
The UMG8900 hardware supports TDM switching and packet switching. The system
switching capability is shown in Table 5-4.
Table 5-4 Platform switching capability
Item Index
Packet switching 128 Gbit/s
TDM switching 256 kDS0
5.2.3 Reliability
The parameters of the system reliability are shown in Table 5-5.
Table 5-5 Reliability parameters
Item Index
Resource availability in typical configuration ≥ 99.999%
MTBF 43.59 years
Ratio of successful master/slave swap > 90%
MTTR ≤ 0.5 hours (excluding prepare time)
5.2.4 Voice Quality Parameter
The voice quality parameters are shown in Table 5-6.
Table 5-6 Voice quality parameters
Item Index
Jitter Buffer 20–200 ms
Loss package compensation < 5%, MOS ≥ 3.7
EC 64 ms, 128 ms
Codec switch time < 60 ms
Gateway jitter time < 10 ms
VoIP voice quality In a benign network condition, MOS > 4.0,
average PSQM < 1.5;
In a poor network condition (packet loss ratio =
1%, network jitter = 20 ms, delay = 100 ms),
MOS > 3.5, average PSQM < 1.8

5.3 Technical Parameter of the Whole System
5.3.1 Power Supply and Consumption
The UMG8900 is supplied with -48V DC trough the cable between the DC distribution
rack of user side and the distribution frame on the cabinet top. The power consumption
of a single frame is 700 W to 1100 W, but varies with the application environment. For
an end exchange, for example, the maximum power of the SIWF function is 700 W, and
that of the cabinet with three frames is 3300 W.
Table 5-7 lists the typical power consumption settings.
Table 5-7 Typical power consumption setting
Function User/Trunk number Configuration Power consumption
VMSC 300,000 2 UMG8900 frames, 1 SIWF frame < 3 kW
VMSC 1,000,000 5 UMG8900 frames, 1 SIWF frame < 6 kW
VMSC 1,800,000 8 UMG8900 frames, 1 SIWF frame < 9 kW
The distribution frame of the UMG8900 provides -48V DC and six output channels per
cabinet with three frames. Each frame provides two-channel output in hot backup mode
to ensure stable power supply. Functions and performance parameters are shown in
Table 5-8.

Table 5-8 UMG8900 power supply and consumption
Item Index
Input
feature
Rated input
voltage
–48 V
Range of input
voltage
–40 to –60 V
Input mode 2-channel –48 V or 1-channel –48 V input
Maximum input
current
2-channel –48 V backup input (hot backup mode): 70 A per
channel
Security standard compliance IEC60950, EN60950 and GB4943
DC
lightening
protection
Differential
protection
When impressing positive and negative test current of 8/2 µS and
3 kA between -48 V and BGND five times respectively: residual
voltage ≤ 200 V
Common mode
protection
When impressing positive and negative test current of 8/20 µS
and 3 kA between -48 V (BGND) and PGND five times
respectively: residual voltage ≤ 300 V
Monitor Use a dedicated module to monitor and control power supply and environment through
maintenance bus
5.3.2 Mechanical Data
Mechanical data of the UMG8900 are described in Table 5-9.
Table 5-9 Mechanical data of the UMG8900
Item Parameter
Cabinet size Height: 2200 mm, width: 600 mm depth: 800 mm
Size and weight of a
frame
(12 × 44.45mm = 533.4 mm) (height: 12U) × 482.6 mm(width: 19 inches, including
mount angle) × 500 mm(depth: the distance from front surface of rack-mounting
ear to back surface of subrack)
Empty frame: about 17.5 kg
Full configured frame: 80 kg
Cabinet weight
Empty cabinet: 125 kg (Including air deflect frame, power distribution box and
other spare parts rather than service frames)
Three-frame full configuration: 370 kg (excluding doors)
Bearing capacity > 600 kg/m2

5.4 Environment Parameter
5.4.1 Storage Environment
I. Temperaure
The temperature for storing the device is described in Error! Reference source not
found..
Table 5-10 Requirements of temperature
Item Requirement
Altitude ≤ 5000 m
Air pressure 70 – 106 kPa
Temperature –40 – +70 °C
Temperature change degree ≤ 1 °C/min
Relative humidity 10% – 100%
Sun radiation ≤ 1120 W/s²
Wind speed ≤ 30 m/s
II. Biological Environment
No such microbe as fungi and leaf mold or no rodent animals such as mouse exist.
III. Air Cleanness
 No explosive, conductive or corrosive dusts
 Percentage of mechanical active substances complies with Table 5-11.
Table 5-11 Percentage of mechanical active substances
Mechanical active substance Percentage
Suspended dust ≤ 5.00 mg/m³
Deposited dust ≤ 20.00 mg/m2.h
Sand granule ≤ 300.00 mg/m³
Note:
Suspended dust diameter: ≤ 75 ③m
Deposited dust diameter: from 75 ③m to 150 ③m
Sand granule diameter: from 150 ③m to 1000 ③m
 Potency of chemical active substances complies with Table 5-12.

Table 5-12 Potency of chemical active substances
Chemical active substance Percentage
SO2 0.30–1.00 mg/m³
H2S 0.10–0.50 mg/m³
NO2 0.50–1.00 mg/m³
NH3 1.00–3.00 mg/m³
Cl2 0.10–0.30 mg/m³
HCl 0.10–0.50 mg/m³
HF 0.01–0.03 mg/m³
O3 0.05–0.10 mg/m³
IV. Mechanical Stress
Mechanical stress must comply with Table 5-13.

Table 5-13 Mechanical stress
Item Sub-item Range
Sinusoidal
oscillation
Offset ≤ 7.0 mm —
Acceleration — ≤ 20.0 m/s²
Frequency 2–9 Hz 9–200 Hz
Non-stable
percussion
Percussion response chart II ≤ 250 m/s²
Payload ≤ 5 kPa
Note:
Percussion response chart: the chart of the response with the largest acceleration to the specified percussion.
Percussion response chart <means that the semi-sine response chart lasts 6 ms.
Payload: the load that the packed device can bear in the specified stacking way.
5.4.2 Transportation Environment
I. Temperaure
The temperature for transporting the device is described in Table 5-14.
Item Requirement
Altitude ≤ 5000 m
Temperature –40 – +70 °C
Heat radiation ≤ 600 W/s²
Rainfall ≤ 6 mn/min
III. Air Cleanness

Suspended dust —
Sand granule ≤ 300.00 mg/m³
Note:
SO2 ≤ 1.00 mg/m³
H2S ≤ 0.50 mg/m³
NO2 ≤ 1.00 mg/m³
NH3 ≤ 3.00 mg/m³
Cl2 ≤ 0.30 mg/m³
HCl ≤ 0.05 mg/m³
HF ≤ 0.03 mg/m³
O3 ≤ 0.10 mg/m³

Item Sub-item Range
Sinusoidal
oscillation
Offset ≤ 7.5 mm — —
Acceleration — ≤ 20.0 m/s² ≤ 40.0 m/s²
Frequency 2–9 Hz 9–200 Hz 200–500 Hz
Random
oscillation
Acceleration
chart density
10 m2/s3 3 m2/s3 1 m2/s3
Frequency 2–9 Hz 9–200 Hz 200–500 Hz
Non-stable
percussion
Percussion
response chart II
≤ 300 m/s²
Payload ≤ 10 kPa
Note:
Percussion response chart: the chart of the response with the largest acceleration to the specified
percussion. Percussion response chart II means that the semi-sine response chart lasts 6 ms.
5.4.3 Running Environment
I. Temperaure
The temperature for running the device is described in Table 5-18 and Table 5-19.
Device Temperature Relative humidity
MSOFTX3000
Long-term running Short-term running Long-term running Short-term running
5 °C–45 °C –5 °C–+45 °C 5%–85% 5%–95%
Note:
Before measuring temperature or relative humidity of the MSOFX3000, make sure the device has no
protection cards around, and the measure tools are 1.5 m from the floor and 0.4 m from the front rack of
the device.
Short term refers to the continuous work time no more than 48 hours at a time or 15 days per year.
Item Requirement
Altitude ≤ 4000 m

Item Requirement
Heat radiation ≤ 600 W/s²
IP level IP50
III. Air Cleanness
Dust granule ≤ 3 × 105 granule/m3
Suspended dust ≤ 0.2 mg/m³
Sand granule ≤ 30 mg/m³
Note:
Dust granule diameter: ≥5 ③m
SO2 0.30–1.00 mg/m³
H2S 0.10–0.50 mg/m³
NO2 0.50–1.00 mg/m³
NH3 1.00–3.00 mg/m³

Cl2 0.10–0.30 mg/m³
HCl 0.10–0.50 mg/m³
HF 0.01–0.03 mg/m³
O3 0.05–0.10 mg/m³
CO ≤ 5.0 mg/m³
Item Sub-item Range
Sinusoidal
oscillation
Offset ≤ 5.0 mm —
Acceleration — ≤ 20.0 m/s²
Frequency 5–62 Hz 62–200 Hz
Non-stable
percussion
Percussion response chart II ≤ 50 m/s²
Payload 0
Note:
Percussion response chart: the chart of the response with the largest acceleration to the specified percussion.
Percussion response chart II means that the semi-sine response chart lasts 6 ms.

Appendix A List of Acronyms and Abbreviations
3
3GPP 3rd Generation Partnership
A
A4L 4-Port STM-1 ATM Single Mode Fiber Interface Board
AAL2 ATM Adaptation Layer 2
AAL5 ATM Adaptation Layer 5
AMR Adaptive Multi-Rate
API Application Program Interface
ASU SAR Processing Unit
ATM Asynchronous Transfer Mode
B
BAM Back Administration Module
BAP ATM and POS Backup Board
BEA Backup 32-port E1/T1 ATM Interface Card
BFE Backup E8T
BGE Backup E1G
BHCA Busy Hour Call Attempt
BICC Bearer Independent Call Control
BITS Building Integrated Timing Supply System
BLU Back Link Unit
BSC Base Station Controller
BSS Base Station Subsystem
BSSAP Base Station Subsystem Application Protocol
C
CDMA Code Division Multiple Access
CLK Clock Unit
CMU Connection Maintenance Unit
Codec Coder-Decoder

CP Control Plane
CS Circuit Switched
D
DC Direct Current
Dopra Distributed Object-Oriented Programmable Realtime Architecture
DSCP Differentiated Services CodePoint
E
E1G One-Port Gigabit Ethernet Single-Mode Fiber Interface Board
E32 32E1 Ports TDM Interface Board
E8T 8-Port 10/100M Ethernet Interface Board
E1/T1 IMA E1/T1 Inverse Multiplexing ATM (a type of interface)
EAC 32-Port E1/T1 ATM Interface Card
EC Echo Cancellation
ECU Echo Canceller Unit
F
FAM Front Administration Module
FE Fast Ethernet
FLU Front Link Unit
G
GE Gigabit Ethernet
GLONASS Global Navigation Satellite System
GMSC Gateway MSC
GPS Global Positioning System
GSM Global System for Mobile communications
GUI Graphic User Interface
H
I
IEC International Electrotechnical Commission
IP Internet Protocol
IPBCP IP Bear Control Protocol
IP DiffServ IP Differentiated Services

IPSec
ISDN
IWF
IP Security
Integrated Services Digital Network
Interworking Function
L
LAN Local Area Network
LE Local Exchange
LMT Local Maintenance Terminal
M
Mc Media Gateway Control Interface
MCMB Mobile Network Back Connection Maintenance Unit
MCMF Mobile Network Front Connection Maintenance Unit
MGC Media Gateway Controller
MGW Media Gateway
MML Man-Machine Language
MMPU Mobile Network MPU
MOMU Mobile Network OMU
MOS Mean Conversation-Opinion Score
MPPB Mobile Network Back Protocol Processing Unit
MPTY Multiparty Service
MPU Main Processing Unit
MSC Mobile Switching Center
MTBF Mean Time Between Failures
MTP2 Message Transfer Part Level 2
MTP3 Message Transfer Part Level 3
MTP-3b Message Transfer Part Level 3-Broadband
MTTR Mean Time to Repair
N
NET Packet Switch Unit
NGN Next Generation Network
O
OAM Operation and Maintenance

OMC Operation and Maintenance Center
OMU Operation & Maintenance Unit
P
P1H One-Port STM-4 POS Optical Interface Board
P4L 4-Port STM-1 POS Optical Interface Board
PC Personal Computer
POS Packet over SDH
PPU Protocol Processing Unit
PSQM Perceptual Speech Quality Measurement
PSTN Public Switched Telephone Network
Q
QoS Quality of Service
R
RAN Radio Access Network
RANAP Radio Access Network Application Part
RNC Radio Network Controller
RPU RTP processing Unit
RS232/485
Recommended Standard 232/485 (computer serial interface,
IEEE)
RTCP Real Time Transfer Control Protocol
RTP Real Time Protocol
S
S2L 2 × 155M SDH Single-Mode Fiber Interface Board
SAAL Signaling ATM Adaptation Layer
SAR Segmentation and Reassembly
SCCP Signaling Connection Control Part
SCTP Stream Control Transfer Protocol
SDH Synchronous Digital Hierarchy
SFP Small Form Plugable
SG Signaling Gateway
SIWF Shared IWF

SONET Synchronous Optical Network
SPF Front Signalling Processing Unit
SRU Shared Resource Unit
SS7 Signaling System Number 7
STM-1 Synchronous Transport Mode-1
T
T32 32T1 Port TDM Interface Board
TAC 32-Port T1 ATM Interface Card
TC TransCoder
TCLU TDM Convergence & Link Unit
TCU TransCode Unit
TDM Time Division Multiplexing
TFO Tandem Free Operation
TMSC Trunk MSC
TNU TDM Central Switching Net Unit
TOS Tag of Service
TrFO TransCode Free Operation
U
UMTS Universal Mobile Telecommunications System
UP User Plane
V
VMSC Visited MSC
VoIP Voice over IP
VRP Versatile Routing Platform
W

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