SRAN8.0 GBSS15.0 RAN15.0 BSC6900 Product Description.pdf

SRAN8.0&GBSS15.0&RAN15.0 BSC6900
Product Description
Issue Draft A
Date 2012-05-30
HUAWEI TECHNOLOGIES CO., LTD.

Draft A (2012-05-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
i
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Product Description About This Document
ii
About This Document
Overview
This document describes the network position, product architecture and characteristics, and
related technical specifications of the BSC6900.
This document helps users learn the basic information about the BSC6900.
Intended Audience
This document is intended for:
 Huawei technical support
 System engineers
 Network planning engineers
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
Alerts you to a high risk hazard that could, if not avoided,
result in serious injury or death.
Alerts you to a medium or low risk hazard that could, if not
avoided, result in moderate or minor injury.
Alerts you to a potentially hazardous situation that could, if not
avoided, result in equipment damage, data loss, performance
deterioration, or unanticipated results.
Provides a tip that may help you solve a problem or save time.
Provides additional information to emphasize or supplement
important points in the main text.

Product Description About This Document
iii
Change History
Changes between document issues are cumulative. The latest document issue contains all the
changes made in earlier issues.
Draft A (2012-05-30)
This is the first commercial release.

Product Description Contents
iv
Contents
About This Document.................................................................................................................... ii
1 Introduction....................................................................................................................................1
1.1 Positioning .......................................................................................................................................................1
1.2 Benefits ............................................................................................................................................................3
2 Architecture....................................................................................................................................6
2.1 Overview..........................................................................................................................................................6
2.2 Hardware Architecture .....................................................................................................................................6
2.2.1 Cabinets ..................................................................................................................................................6
2.2.2 Subracks..................................................................................................................................................7
2.2.3 Boards.....................................................................................................................................................8
2.3 Software Architecture.....................................................................................................................................12
2.4 Reliability.......................................................................................................................................................14
2.4.1 System Reliability.................................................................................................................................14
2.4.2 Hardware Reliability.............................................................................................................................15
2.4.3 Software Reliability ..............................................................................................................................16
3 Configurations.............................................................................................................................17
3.1 Overview........................................................................................................................................................17
3.2 Capacity Configuration of the BSC6900 GSM ..............................................................................................18
3.2.1 Hardware Capacity Configuration in BM/TC Combined Mode ...........................................................18
3.2.2 Hardware Capacity Configuration in BM/TC Separated Mode............................................................18
3.2.3 Hardware Capacity Configuration in A over IP Mode ..........................................................................19
3.3 Capacity Configuration of the BSC6900 UMTS............................................................................................20
3.3.1 Capacity of the BSC6900 UMTS in the Balanced Traffic Model.........................................................21
3.3.2 Capacity of the BSC6900 UMTS in the High-PS Traffic Model..........................................................22
3.3.3 Capacity of the BSC6900 UMTS in the Traffic Model for Smart Phones ............................................23
3.4 Capacity Configuration of the BSC6900 GU.................................................................................................24
4 Operation and Maintenance .....................................................................................................26
4.1 Overview........................................................................................................................................................26
4.2 Benefits ..........................................................................................................................................................27
5 Technical Specifications ............................................................................................................29
5.1 Technical Specifications.................................................................................................................................29

Product Description Contents
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5.1.1 Capacity Specifications.........................................................................................................................29
5.1.2 Structural Specifications .......................................................................................................................30
5.1.3 Clock Specifications .............................................................................................................................30
5.1.4 Electrical Specifications........................................................................................................................31
5.1.5 Space Specifications .............................................................................................................................32
5.1.6 Environmental Specifications ...............................................................................................................32
5.1.7 Transmission Ports................................................................................................................................33
5.1.8 Reliability Specifications ......................................................................................................................33
5.2 Compliance Standards....................................................................................................................................33
5.2.1 Power Supply Standard.........................................................................................................................33
5.2.2 Grounding Standard ..............................................................................................................................33
5.2.3 Environment Standards .........................................................................................................................34
5.2.4 Safety Standards....................................................................................................................................34
5.2.5 EMC Standards .....................................................................................................................................35
5.2.6 Environment Standards .........................................................................................................................35
A Acronyms and Abbreviations..................................................................................................36

Product Description 1 Introduction
1
1 Introduction
1.1 Positioning
This document applies to BSC6900 V900R015.
With the rapid development of mobile communications technologies, multiple network
systems come into coexistence. In this situation, the network operators worldwide have to
deploy different networks and pay high capital expenditure (CAPEX) and operation
expenditure (OPEX) accordingly. Therefore, the industry has been focusing on the
convergence of multiple network systems to reduce the expenditures of the operators.
The BSC6900 is an important network element (NE) of Huawei SingleRAN solution. The
BSC6900 adopts the industry-leading multiple radio access technologies (RATs), IP
transmission mode, and modular design. The BSC6900 also incorporates the functions of a
UMTS RNC and a GSM BSC, accommodating the need for multi-RAT convergence in the
mobile network.
The BSC6900 can be flexibly configured as a BSC6900 GSM, BSC6900 UMTS, or BSC6900
GU in different networks. The BSC6900 GSM or BSC6900 UMTS is referred to as the
BSC6900 in independent mode, and the BSC6900 GU is referred to as the BSC6900 in
integrated mode.
The BSC6900 GSM operates as an independent NE to access a GSM network and provides
the functions of a GSM BSC. The BSC6900 GSM is compliant with the standard 3GPP
Release 10, supports EDGE+, and can be upgraded to a BSC6900 GU through the addition of
UMTS boards and a software upgrade.
The BSC6900 UMTS operates as an independent NE to access a UMTS network and
provides the functions of a UMTS RNC. Compliant with the standard 3GPP Release 10, the
BSC6900 UMTS can be upgraded to the BSC6900 GU through addition of GSM boards and
software upgrades.
The BSC6900 GU operates as an integrated NE to access a network where GSM and UMTS
services coexist and provides the functions of a GSM BSC and a UMTS RNC. When the
BSC6900 GU accesses the GSM network, the 3GPP Release 10 applies. When the BSC6900
GU accesses the UMTS network, the 3GPP Release 10 applies.
Figure 1-1 shows the BSC6900.

2
Figure 1-1 BSC6900
The BSC6900 connects to GSM and UMTS core networks (CNs) and manages base stations
in GSM and UMTS networks. Figure 1-2 shows the position of the BSC6900 in the network.
Figure 1-2 Position of the BSC6900 in the network
The interfaces between the BSC6900 and each NE in the UMTS network are as follows:
 Iub: the interface between the BSC6900 and the NodeB
 Iur: the interface between the BSC6900 and the RNC
 Iur-g: the interface between the BSC6900 and the BSC
 Iu-CS: the interface between the BSC6900 and the mobile switching center (MSC) or
media gateway (MGW)
 Iu-PC: the interface between the BSC6900 and the serving mobile location center
(SMLC)
 Iu-PS: the interface between the BSC6900 and the serving GPRS support node (SGSN)
 Iu-BC: the interface between the BSC6900 and the cell broadcast center (CBC)

3
These interfaces are standard interfaces, through which the equipment from different vendors
can be interconnected.
The interfaces between the BSC6900 and each NE in the GSM network are as follows:
 Abis: the interface between the BSC6900 and the BTS
 A: the interface between the BSC6900 and the MSC or MGW
 Gb: the interface between the BSC6900 and the SGSN
 Lb: the interface between the BSC6900 and the SMLC
The A and Gb interfaces are standard interfaces, through which equipment from different
vendors can be interconnected.
The BSC6900 performs functions such as radio resource management (RRM), base station
management, power control, and handover control.
1.2 Benefits
Flexible Topologies, Smooth Evolution, and Outstanding Capability in
Multi-RAT Convergence
 The BSC6900 can be flexibly configured as a BSC6900 GSM, BSC6900 UMTS, or
BSC6900 GU. Therefore, it is applicable to various networking scenarios.
 The BSC6900 can be configured as one of the three variants, facilitating the smooth
evolution from GSM to GSM+UMTS and between GSM+UMTS and UMTS.
 The functions of BSC6900 boards can be configured online to dynamically adjust the
capacity allocation between the GSM and UMTS networks.
The BSC6900 is compatible with the BSC6810 and BSC6000 hardware. Through software
loading, the BSC6810 and BSC6000 in the live network can be upgraded to the BSC6900.
High Integration and Capacity
The BSC6900 conforms to the trend of higher capacity and fewer sites, saving space in the
equipment room and reducing power consumption. In addition, the BSC6900 meets the
requirements for rapid service growth and protects the operator's equipment investment.
 The BSC6900 adopts the dual switching planes based on IP and time division
multiplexing (TDM). It provides a maximum of 480 Gbit/s data switching capacity on
the IP plane and 128 kbit/s x 128 kbit/s data switching capacity on the TDM plane.
 The BSC6900 boards use multi-core processors, which greatly increases the processing
capability.
Improved Utilization of Transmission Bandwidth Through Sharing of
Transmission Resources
 The BSC6900 provides a highly efficient transmission resource management algorithm,
which enables the transmission bandwidth to be shared between the GSM and UMTS
networks. In this way, the transmission bandwidth utilization increases by 5% to 10%.
 The IP interface board of the BSC6900 is shared between the GSM and UMTS networks
so that it can simultaneously transmit GSM and UMTS data.

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 The BSC6900 supports the following flexible transmission modes shared between the
GSM and UMTS networks:
− Abis/Iub over IP
− 2G/3G co-transmission based on TDM timeslot switching
− A/Iu-CS over IP
− Gb/Iu-PS over IP
Compatible Hardware in Different Networks
The BSC6900 shares a hardware platform with the BSC6000 and the BSC6810, and all the
BSC6000 and BSC6810 hardware can be used by the BSC6900.
 The BSC6900 shares all the hardware and software of radio resource management
modules, operation and maintenance (O&M) modules, and clock synchronization
modules with the BSC6000 and the BSC6810.
 The BSC6900 shares the hardware of most service processing modules, signaling
processing modules, and interface processing modules with the BSC6000 and the
BSC6810. In addition, the working mode of boards can be configured online.
The BSC6900 maximizes the sharing of spare parts between the GSM and UMTS networks,
simplifying the management of spare parts and protecting the equipment investment.
Reduced OPEX Through the Shared O&M System
The BSC6900 integrates the two separate O&M systems of the traditional GSM and UMTS
networks into a unified O&M system, improving user experience and making it easier to
maintain the multi-RAT system.
The BSC6900 uses the Web-based local maintenance terminal (LMT) without the need to
install the client software. You can directly use the LMT after logging in to the BSC6900
homepage. The use of the LMT simplifies operations such as equipment commissioning and
software upgrades and reduces the O&M cost.
Expanded Network Capacity Through Optimized Co-RRM Algorithm
The Co-RRM algorithm implements the unified management and intelligent scheduling of
radio resources in the GSM and UMTS networks.
The traditional Co-RRM algorithm exchanges 2G/3G load information between the GSM and
UMTS networks through signaling procedures across the CNs. The Co-RRM algorithm
optimized by Huawei enables rapid transmission of 2G/3G load information (as internal
messages) within the BSC6900. The advantages are as follows:
 Having no dependency on the CN equipment
 Reducing the delay, adjusting the load in real time, and increasing the success rate of
inter-RAT handovers
 Decreasing the signaling flow on the standard interfaces and saving interface resources
The optimized Co-RRM algorithm maximizes the sharing of radio resources between the
GSM and UMTS networks, increasing network capacity.

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Improved Resource Utilization Through GSM/UMTS/LTE Interoperability
In seamless coverage scenarios, radio resources can be shared between the GSM and LTE
networks or between the GSM and UMTS networks, improving resource utilization.
In seamless coverage scenarios with the UMTS and LTE networks, the BSC6900 provides the
functions of cell selection and handover from the LTE network to the UMTS network. In
addition, radio resources can be shared, improving resource utilization.

Product Description 2 Architecture
6
2 Architecture
2.1 Overview
The BSC6900 has a modular design and enhances resource utilization and system reliability
by fully interconnecting subracks and applying distributed resource pools to manage service
processing units. The backplane is universal and every slot is compatible with different types
of boards so that various functions can be performed. This improves the universality and
future evolution capability of the hardware platform.
The BSC6900 GU integrates the functions of the BSC6900 GSM and the BSC6900 UMTS
through the unified software management, shared OMU and GCU/GCG, and configuration of
GSM service boards and UMTS service boards in separate subracks. The MPS can be a GSM
subrack or a UMTS subrack.
Figure 2-1 Example configurations of the BSC6900 GU, BSC6900 GSM, and BSC6900 UMTS
2.2 Hardware Architecture
2.2.1 Cabinets
The BSC6900 uses the Huawei N68E-22 cabinet and N68E-21-N cabinet. The design
complies with the IEC60297 and IEEE standards.
Based on the subrack configuration, the BSC6900 cabinets are classified into the main
processing rack (MPR), extended processing rack (EPR), and transcoder rack (TCR), as
described in Table 2-1. The subracks should be configured from the bottom up.

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Table 2-1 Classification of the BSC6900 cabinets
Cabinet Contained Subrack Configuration Principle
MPR 1 MPS, 0–2 EPSs Only one MPR is configured.
EPR 1–3 EPSs No EPR or only one EPR is configured as
required by the actual service capacity.
TCR (only for
the BSC6900
GSM and the
BSC6900 GU)
1–3 TCSs In BM/TC separated mode, 0 to 2 TCRs are
configured.
Figure 2-2 BSC6900 cabinet
2.2.2 Subracks
In compliance with the IEC60297 standard, the BSC6900 subrack has a standard width of 19
inches. The height of each subrack is 12 U. Boards are installed on the front and rear sides of
the backplane, which is positioned in the center of the subrack.
One subrack provides 28 slots. The slots on the front of the subrack are numbered from 0 to
13, and those on the rear are numbered from 14 to 27.
Figure 2-3 shows the front view and rear view of the subrack.

8
Figure 2-3 Front view (left) and rear view (right) of the subrack
The BSC6900 subracks are classified into the main processing subrack (MPS), extended
processing subrack (EPS), and transcoder subrack (TCS), as described in Table 2-2.
Table 2-2 Classification of the BSC6900 subracks
Subrack Quantity Function
MPS 1 The MPS performs centralized switching and
provides service paths for other subracks. It
also provides the service processing interface,
O&M interface, and system clock interface.
EPS 0–5 The EPS performs the functions of user plane
processing and signaling control.
TCS (only for the
BSC6900 GSM and the
BSC6900 GU in BM/TC
separated mode)
0–4 The TCS processes CS services and performs
the functions of voice adaptation and code
conversion.
2.2.3 Boards
Table 2-3 lists the hardware version and its corresponding boards.
Table 2-3 Hardware version and its corresponding boards
Hardware
Version
Corresponding Boards
HW60 R8 OMUb, SCUa, TNUa, GCUa, DPUc, DPUd, XPUa, EIUa, FG2a, GOUa,
OIUa, and PEUa
HW68 R11 OMUa, SCUa, GCGa, GCUa, DPUb, SPUa, AEUa, AOUa, FG2a, GOUa,
PEUa, POUa, and UOIa
HW69 R11 OMUa, SCUa, TNUa, GCGa, GCUa, DPUc, DPUd, DPUe, SPUb, XPUb,
AEUa, AOUc, EIUa, FG2c, GOUc, OIUa, PEUa, POUc, UOIa, and UOIc

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Hardware
Version
Corresponding Boards
HW69 R13 OMUc, SAUa, SAUc, SCUb, TNUa, GCGa, GCUa, DPUe, DPUf, DPUg,
SPUb, XPUb, NIUa, AEUa, AOUc, EIUa, FG2c, GOUc, OIUa, PEUa,
POUc, and UOIc
HW69 R15 OMUc, SAUa, SAUc, SCUb, TNUa, GCGa, GCUa, DPUe, DPUf, DPUg,
SPUb, XPUb, NIUa, AEUa, AOUc, EIUb, FG2c, GOUc, OIUb, PEUa,
POUc, and UOIc
NOTE
The board names that are boldfaced in Table 2-3 indicate that the boards are not included in the previous
hardware version.
Table 2-4 describes the mapping between hardware versions and software versions.
Table 2-4 Mapping between hardware versions and software versions
Hardware
Version
BSC6000 BSC6810 BSC6900
GBSS8.1 RAN11.0 SRAN3.0/G
BSS9.0/RA
N11.1
SRAN5.0/GB
SS12.0/RAN1
2.0
SRAN6.0/G
BSS13.0/RA
N13.0
SRAN7.0/GB
SS14.0/RAN1
4.0
SRAN8.0/
S15.0/RAN
0
HW60 R8 Supported Not
supported
Supported Supported Supported Supported Supported
HW68 R11 Not
supported
Supported Supported Supported Supported Supported Supported
HW69 R11 Not
supported
Not
supported
Supported Supported Supported Supported Supported
HW69 R13 Not
supported
Not
supported
Not supported Not supported Supported Supported Supported
HW69 R15 Not
supported
Not
supported
Not supported Not supported Not supported Not supported Supported
The BSC6900 boards can be classified into the O&M board, switching processing board,
clock processing board, signaling processing board, service processing board, service
identification board, and interface processing board, as described in Table 2-5.

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Table 2-5 Classification of the BSC6900 boards
Board
Type
Board
Name
Function Application
Variant
O&M
board
OMUc  Performs configuration management,
performance management, fault
management, security management, and
loading management for the BSC6900.
 Works as the O&M bridge of the
LMT/M2000 to provide the BSC6900
O&M interface for the LMT/M2000 and to
enable communication between the
BSC6900 and the LMT/M2000.
 Works as the interface to provide the
Web-based online help.
 BSC6900 GSM
 BSC6900 GU
 BSC6900 UMTS
SAUa  Collects data about the call history record
(CHR) and pre-processes the collected data.
 Filters and summarizes raw data of the
BSC6900 as required by the Nastar and
uploads the pre-processed data to the Nastar
through the M2000 for analysis.
 BSC6900 GSM
 BSC6900 GU
 BSC6900 UMTS
SAUc
Switching
processing
board
SCUb  Provides MAC/GE switching and enables
the convergence of ATM and IP networks.
MAC is short for Media Access Control
and ATM is short for asynchronous transfer
mode.
 Provides data switching channels.
 Provides system-level or subrack-level
configuration and maintenance.
 Distributes clock signals for the BSC6900.
 The switching capability of the SCUb board
is four times that of the SCUa board.
 BSC6900 GSM
 BSC6900 GU
 BSC6900 UMTS
TNUa  Provides the TDM switching and serves as
the center of the circuit switched domain.
 Assigns resources of the TDM network and
establishes network connections.
 Provides communication processing on the
GE port.
 BSC6900 GSM
 BSC6900 GU
Clock
processing
board
GCUa Obtains the system clock source, performs the
functions of phase-lock and holdover, and
provides clock signals.
Unlike the GCUa board, the GCGa board can
receive and process GPS signals.
 BSC6900 GSM
 BSC6900 GU
 BSC6900 UMTS
GCGa

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Board
Type
Board
Name
Variant
Signaling
processing
board
SPUb Manages user plane and signaling plane
resources in the subrack and processes
signaling.
The SPUb board processes the signaling on
the GSM/UMTS signaling plane. The
processing capability of the SPUb board is
75% to 100% higher than that of the SPUa
board.
 BSC6900 GSM
 BSC6900 GU
 BSC6900 UMTS
XPUb The XPUb board processes the signaling on
the GSM signaling plane. The processing
capability of the XPUb board is 75% to 100%
higher than that of the XPUa board.
 BSC6900 GSM
 BSC6900 GU
Service
processing
board
DPUe Processes voice and data services within the
system.
The DPUe board processes UMTS voice
services, UMTS data services, and GSM data
services.
 BSC6900 GSM
 BSC6900 GU
 BSC6900 UMTS
DPUf Encodes and decodes GSM voice services,
converts the speech frame format over the IP
speech channel, and processes voice services
in the system.
 BSC6900 GSM
 BSC6900 GU
DPUg Processes GSM data services.  BSC6900 GSM
 BSC6900 GU
Service
identificati
on board
NIUa Provides the service identification function. It
works with the service processing boards to
schedule different types of services.
 BSC6900 GSM
 BSC6900 GU
 BSC6900 UMTS
Interface
processing
board
AEUa  Provides 32 channels of ATM over
E1s/T1s.
 Extracts clock signals and sends the signals
to the GCUa or GCGa board.
 BSC6900 GU
 BSC6900 UMTS
AOUc  Provides four channels of ATM over
channelized optical STM-1/OC-3.
 Supports ATM over E1/T1 over
SDH/SONET.
 Provides 252 E1s or 336 T1s.
 BSC6900 GU
 BSC6900 UMTS
EIUb  Provides 32 E1s/T1s.
 Transmits, receives, encodes, and decodes
the 32 E1s/T1s. The E1 transmission rate is
2.048 Mbit/s; the T1 transmission rate is
1.544 Mbit/s.
 BSC6900 GSM
 BSC6900 GU

12
Board
Type
Board
Name
Variant
FG2c  Provides 12 channels over FE or 4 channels
over GE.
 Supports IP over FE/GE.
 BSC6900 GSM
 BSC6900 GU
 BSC6900 UMTS
GOUc  Provides four channels over GE.
 Supports IP over GE.
 BSC6900 GSM
 BSC6900 GU
 BSC6900 UMTS
OIUb Provides one channelized STM-1 with the
rate of 155.52 Mbit/s.
 BSC6900 GSM
 BSC6900 GU
PEUa  Provides 32 channels of IP over E1s/T1s.
 BSC6900 GSM
 BSC6900 GU
 BSC6900 UMTS
POUc  Provides four channels of TDM/IP over
channelized optical STM-1/OC-3.
 Supports IP over E1/T1 over SDH/SONET.
 Provides the load bearer capability of 252
E1s or 336 T1s.
 BSC6900 GSM
 BSC6900 GU
 BSC6900 UMTS
UOIc  Provides eight channels over unchannelized
STM-1/OC-3c.
 Supports ATM over SDH/SONET.
 BSC6900 GU
 BSC6900 UMTS
2.3 Software Architecture
The BSC6900 software is designed with a layered architecture. Each layer is dedicated to its
own functions and provides services for other layers. At the same time, the technical
implementation and physical topology of each layer is isolated from other layers. Figure 2-4
shows the software architecture of the BSC6900.

13
Figure 2-4 Software architecture of the BSC6900
Table 2-6 describes the functions of each layer in the BSC6900 software architecture.
Table 2-6 Functions of each layer in the BSC6900 software architecture
Layer Function
Infrastructure  Provides the hardware platform and hides the lower-layer hardware
implementations.
 Hides the differences between operating systems, and provides
enhanced and supplementary functions for the system.
System
management
plane (SMP)
Provides the O&M interface to perform the O&M functions of the
system.
Internal
Communication
Control Plane
(ICCP)
 Transfers internal maintenance messages and service control
messages between different processors, implementing efficient
control over distributed communication.
 Operates independently of the infrastructure layer.
Service
Transport
Control Plane
(STCP)
 Transfers service data on the user plane and control plane at the
network layer between NEs.
 Separates the service transport technology from the radio access
technology and makes the service transport transparent to the
upper-layer service.
 Provides service bearer channels.

14
Layer Function
Application  Implements the basic functions of BSC service control and
concentrates on the upper-layer service control, such as call
processing, mobility management, and RRM.
 Hides the topology characteristics of various resources in the network
and in the equipment.
 Provides the resource access interface, hides the distribution of
internal resources and network resources, maintains the mapping
between the service control and the resource instance, and controls
the association between various resources.
 Manages the resources and O&M status, responds to the resource
request from the upper layer, and hides the resource implementation
from the upper layer.
 Isolates the upper-layer services from the hardware platform to
facilitate the hardware development.
2.4 Reliability
The resource pool design and redundancy mechanism are widely used in the system reliability
design of the BSC6900. The techniques of detecting and isolating the faults in the boards and
in the system are optimized and the software fault tolerance capability is improved to enhance
system reliability.
2.4.1 System Reliability
The BSC6900 system reliability is designed with the following features:
 High-reliability architecture design
The design of dual switching planes, with up to 480 Gbit/s GE star non-blocking
switching capability per subrack, prevents the single point failure in the deployment of
the high-capacity BSC6900.
Moreover, the port trunking technology is adopted on the switching boards. The port
trunking function allows data backup in case of link failures, preventing inter-plane
switchovers and cascading switchovers and improving the reliability of intra-system
communication.
Dual clock planes are used in the clock transmission between the GCUa/GCGa board
and the SCUb board. Therefore, a single point of failure does not affect the normal
operation of the system clock.
 Resource pool design
In case of overload, the system implements load sharing between the control plane and
the user plane by employing a full resource pool design. This effectively prevents
suspension because of overload, improving resource utilization and system reliability.
 Redundancy mechanism
All the BSC6900 hardware adopts the redundancy mechanism. The rapid switchover
between active and standby parts improves system reliability. Moreover, with the quick
fault detection and rectification mechanism, the impact of the faults on services is
minimized.

15
 Flow control
The system performs flow control based on the central processing unit (CPU) and
memory usage. Therefore, the BSC6900 can continue working by regulating the items
pertaining to performance monitoring, resource auditing, and resource scheduling in the
case of CPU overload and resource congestion. In this way, the system reliability is
enhanced.
2.4.2 Hardware Reliability
The BSC6900 hardware reliability is designed with the following features:
 The system uses the multi-level cascaded and distributed cluster control mode. Several
CPUs form a cluster processing system. The communication channels between CPUs are
based on the redundancy design or anti-suspension/breakdown design.
 The system uses the redundancy design, as described in Table 2-7, to support the hot
swap of boards and backup of boards and ports. Therefore, the system has a strong fault
tolerance capability.
Table 2-7 Board redundancy
Board Redundancy Mode
AEUa Board redundancy
AOUc Board redundancy + MSP 1:1 or MSP 1+1 optical port
redundancy
DPUe/DPUf/DPUg Board resource pool
EIUb Board redundancy
FG2c Board redundancy + board resource pool + GE/FE port
redundancy or load sharing
GCUa/GCGa Board redundancy
GOUc Board redundancy + board resource pool + GE port
redundancy or load sharing
OIUb Board redundancy
OMUc Board redundancy
PEUa Board redundancy
POUc Board redundancy + MSP 1:1 or MSP 1+1 optical port
redundancy
SAUa/SAUc Single configuration
SCUb Board redundancy + port trunking on GE ports
SPUb/XPUb Board redundancy
NIUa Board resource pool
TNUa Board redundancy

16
Board Redundancy Mode
UOIc Board redundancy + MSP 1:1 or MSP 1+1 optical port
redundancy
 An isolation mechanism is used. When entity A fails to accomplish a task, entity B that
has the same functions as entity A takes over the task. Meanwhile, entity A is isolated
until it is restored.
 When a board with a single function is faulty, you can restart the board.
 All boards support dual-BIOS. BIOS is short for basic input/output system. Faults in one
BIOS do not affect the startup or operation of the boards.
 The system uses the nonvolatile memory to store important data.
 With advanced integrated circuits, the system features high integration, sophisticated
technology, and high reliability.
 All the parts of the system have high quality and pass the aging test. The hardware
assembly process is strictly controlled. These methods ensure the high stability and
reliability for long-term operation.
2.4.3 Software Reliability
The BSC6900 software reliability is designed with the following features:
 Scheduled check on crucial resources
The software check mechanism checks various software resources in the system. If
resources are out of service because of software faults, this mechanism can release
abnormal resources and generate related logs and alarms.
 Task monitoring
When the software is running, internal software faults and some hardware faults can be
monitored through the monitoring process. The monitoring process monitors the task
running status and reports errors to the O&M system.
 Data check
The software integrity check and digital signature technique are adopted to prevent the
software from being tampered with during the transmission and storage.
The software performs scheduled or event-driven data consistency checks, restores data
selectively or preferably, and generates logs and alarms.
 Data backup
Both the data in the OMU database and the data of other boards can be backed up to
ensure data reliability and consistency.
 Operation log storage
The system automatically records historical operations into logs. The operation logs help
in locating and rectifying the faults caused by misoperations.

Product Description 3 Configurations
17
3 Configurations
3.1 Overview
In the BSC6900, the MPS or EPS can be configured with either GSM or UMTS service
processing boards.
When the BSC6900 is configured as a BSC6900 GU or BSC6900 GSM, the TCS can be
configured. Based on the TCS configuration, a BSC6900 GU or BSC6900 GSM supports
three configuration modes: BM/TC combined, BM/TC separated, and A over IP. The basic
module (BM) refers to the MPS and EPS, and the transcoder (TC) refers to the TCS. Table
3-1 describes the configuration modes of a BSC6900 GU or BSC6900 GSM based on the
TCS configuration. When the BSC6900 is configured as a BSC6900 UMTS, these
configuration modes do not apply.
Table 3-1 Configuration modes of a BSC6900 GU or BSC6900 GSM
Configuration
Mode
Description Characteristic
BM/TC
combined
The TCS is not configured. The
boards that implement the TC
functions are inserted into the slots
in the MPS or EPS.
With the same capacity, fewer
cabinets and fewer subracks are
required in the BSC, increasing
the hardware integration.
BM/TC
separated
This mode is applicable in
scenarios where the BSC is
configured in a remote equipment
room. In this mode, the BSC is
configured with a separate TCS,
which is placed in the TCR on the
MSC side. The MPS must work in
GSM mode.
The TCS can be configured in the
TCR on the MSC side, saving
transmission resources between
the BSC and the MSC.
A over IP The TCS is not configured. The TC
functions are implemented by the
MGW.
The BSC is directly connected to
the CN equipment without a TC,
reducing the CAPEX of the
operator. In addition, the number
of speech coding and decoding
times is decreased to improve the
speech quality. This mode meets
the needs for network evolution.

18
The capacity configurations of the BSC6900 GSM, BSC6900 UMTS, and BSC6900 GU are
different from one another. For details, see section 3.2 "Capacity Configuration of the
BSC6900 GSM", section 3.3 "Capacity Configuration of the BSC6900 UMTS", and section
3.4 "Capacity Configuration of the BSC6900 GU".
3.2 Capacity Configuration of the BSC6900 GSM
3.2.1 Hardware Capacity Configuration in BM/TC Combined
Mode
Table 3-2 lists the capacity of a BSC6900 GSM in TDM transmission mode. In this table, the
BSC6900 GSM is configured with HW69 R15 boards and works in BM/TC combined mode.
Table 3-2 Capacity of a BSC6900 GSM in TDM transmission mode (HW69 R15 boards, BM/TC
combined mode)
Typical Configuration
Specifications
1 MPS 1 EPS 1 MPS+1
EPS
1 MPS+2
EPSs
Maximum number of
cabinets
1 1 1 1
Maximum number of
equivalent busy hour call
attempts (BHCA) (k)
1750 2625 4375 5900
Maximum traffic volume
(Erlang)
6500 9750 16,250 24,000
Maximum number of TRXs 1024 1536 2560 4096
Maximum number of active
packet data channels
(PDCHs) (MCS-9)
4096 6144 10,240 16,384
3.2.2 Hardware Capacity Configuration in BM/TC Separated
Mode
Table 3-3 lists the capacity of a BSC6900 GSM. In this table, the BSC6900 GSM is
configured with HW69 R15 boards and works in BM/TC separated mode with the Abis
interface not using the IP transmission mode.

19
Table 3-3 Capacity of a BSC6900 GSM (HW69 R15 boards, BM/TC separated mode, Abis
interface not using the IP transmission mode)
Specifications
1 MPS+1
TCS
1 EPS+1
TCS
1 MPS+1
EPS+2 TCS
1 MPS+2
EPSs+3
TCSs
Maximum number of
cabinets
2 2 2 2
Maximum number of
equivalent BHCA (k)
1750 2625 4375 5900
(Erlang)
6500 9750 16,250 24,000
PDCHs (MCS-9)
4096 6144 10,240 16,384
configured with HW69 R15 boards and works in BM/TC separated mode with the Abis
interface using the IP transmission mode.
Table 3-4 Capacity of a BSC6900 GSM (HW69 R15 boards, BM/TC separated mode, Abis
interface using the IP transmission mode)
Specifications
1 MPS+1
TCS
1 EPS+1
TCS
1 MPS+1
EPS+3
TCSs
1 MPS+2
EPSs+3
TCSs
Maximum number of
cabinets
2 2 2 2
Maximum number of
equivalent BHCA (k)
1750 3500 5250 5900
(Erlang)
6500 13,000 19,500 24,000
PDCHs (MCS-9)
4096 8192 12,288 16,384
3.2.3 Hardware Capacity Configuration in A over IP Mode
configured with HW69 R15 boards and works in Abis over TDM and A over IP mode.

20
Table 3-5 Capacity of a BSC6900 GSM (HW69 R15 boards,Abis over TDM andA over IP
mode)
Specifications
1 MPS 1 EPS 1 MPS+1
EPS
1 MPS+2
EPSs
Maximum number of
cabinets
1 1 1 1
Maximum number of
equivalent BHCA (k)
1750 3500 5250 5900
(Erlang)
6500 13,000 19,500 24,000
PDCHs (MCS-9)
4096 8192 12,288 16,384
configured with HW69 R15 boards and works in Abis over IP and A over IP modes.
Table 3-6 Capacity of a BSC6900 GSM (HW69 R15 boards,Abis over IP and A over IP modes)
Specifications
1 MPS 1 EPS 1 MPS+1
EPS
1 MPS+2
EPSs
Maximum number of
cabinets
1 1 1 1
Maximum number of
equivalent BHCA (k)
1750 6125 7875 11,000
(Erlang)
6500 22,750 29,250 45,000
PDCHs (MCS-9)
4096 14,336 18,432 32,768
3.3 Capacity Configuration of the BSC6900 UMTS
The BSC6900 UMTS supports the flexible configuration of control plane and user plane data
in different scenarios. In each scenario, the capacity configured for the BSC6900 UMTS
depends on actual traffic models.
There are three traffic models for the BSC6900 UMTS:
 Balanced traffic model
This model applies when voice services and data services are balanced in a network.

21
 High-PS traffic model
This model is applicable in scenarios where subscribers use much more data services
than voice services. In this model, the average PS throughput per user is high.
 Traffic model for smart phones
In this model, control plane signaling is frequently exchanged and user plane data is
transmitted mainly through small packets.
Sections 3.3.1 "Capacity of the BSC6900 UMTS in the Balanced Traffic Model", 3.3.2
"Capacity of the BSC6900 UMTS in the High-PS Traffic Model", and 3.3.3 "Capacity of the
BSC6900 UMTS in the Traffic Model for Smart Phones" describe the capacity of a BSC6900
UMTS in typical configurations in the balanced traffic model, high-PS traffic model, and
traffic model for smart phones, respectively.
3.3.1 Capacity of the BSC6900 UMTS in the Balanced Traffic
Model
Table 3-7 describes the balanced traffic model for the BSC6900 UMTS.
Table 3-7 Balanced traffic model for the BSC6900 UMTS (per user in busy hours)
Item Specification Description
CS voice traffic
volume
20 mE Adaptive multi-rate (AMR) speech service, 0.96
BHCA
CS data traffic
volume
1.5 mE UL 64 kbit/s/DL 64 kbit/s CS data service, 0.04
BHCA
PS throughput 4500 bit/s 2 BHCA
Proportion of soft
handovers
30% Proportion of calls using two channels
simultaneously to all calls
Number of
handovers per CS
call
8 Average number of handovers per CS call
Number of
handovers per PS
call
5 Average number of handovers per PS call
Number of
non-access stratum
(NAS) procedures
3.6 Number of NAS procedures between the CN and
the UE, including the location area update, IMSI
attach/detach, routing area update, GPRS
attach/detach, and SMS
Table 3-8 lists the capacity of a BSC6900 UMTS in typical configurations. In this table, the
BSC6900 UMTS is configured with HW69 R15 boards and uses the balanced traffic model.

22
Table 3-8 Capacity of a BSC6900 UMTS in typical configurations (HW69 R15 boards)
Number of
Online Users
CS Voice
Service
Capacity
(Erlang)
PS Service
Capacity (Iub
UL+DL)
(Mbit/s)
BHCA (k) BHCA (k)
(Include
SMS)
1,760,000 45,738 7920 5300 7000
NOTE
The CS voice service capacity and PS service capacity can reach the maximum at the same time.
3.3.2 Capacity of the BSC6900 UMTS in the High-PS Traffic
Model
Table 3-9 describes the high-PS traffic model for the BSC6900 UMTS.
Table 3-9 High-PS traffic model for the BSC6900 UMTS (per user in busy hours)
CS voice traffic
volume
3 mE AMR speech service, 0.144 BHCA
CS data traffic
volume
0.2 mE UL 64 kbit/s/DL 64 kbit/s CS data service,
0.0053 BHCA
PS throughput 43500 bit/s UL 64 kbit/s/DL 384 kbit/s, 3 BHCA
Proportion of soft
handovers
Number of handovers
per CS call
Number of handovers
per PS call
Number of NAS
procedures
3.6 Number of NAS procedures between the CN
and the UE, including the location area update,
IMSI attach/detach, routing area update, GPRS
attach/detach, and SMS
Table 3-10 lists the capacity of the BSC6900 UMTS in typical configurations. In this table,
the BSC6900 UMTS is configured with HW69 R15 boards and uses the high-PS traffic
model.

23
Number of
Online Users
CS Voice
Service
Capacity
(Erlang)
PS Service
Capacity (Iub
UL+DL)
(Mbit/s)
BHCA (k) BHCA (k)
(Include
SMS)
925,000 3606 40,200 2900 3840
NOTE
3.3.3 Capacity of the BSC6900 UMTS in the Traffic Model for
Smart Phones
Table 3-11 describes the traffic model for smart phones for the BSC6900 UMTS.
Table 3-11 Traffic model for smart phones for the BSC6900 UMTS (per user in busy hours)
CS voice traffic volume 3 mE AMR speech service, 0.8 BHCA
CS data traffic volume 0.1 mE UL 64 kbit/s/DL 64 kbit/s CS data service,
0.0001 BHCA
PS throughput 1600 bit/s UL 1.5 kbit/s/DL 7.5 kbit/s, 10 BHCA
Proportion of soft
handovers
Number of handovers
per CS call
Number of handovers
per PS call
Number of NAS
procedures
3.8 Number of NAS procedures between the CN
and the UE, including the location area
update, IMSI attach/detach, routing area
update, GPRS attach/detach, and SMS
Table 3-12 lists the capacity of a BSC6900 UMTS in typical configurations. In this table, the
BSC6900 UMTS is configured with HW69 R15 boards and uses the traffic model for smart
phones.

24
Number of
Online Users
CS Voice
Service
Capacity
(Erlang)
PS Service
Capacity (Iub
UL+DL)
(Mbit/s)
BHCA (k) BHCA (k)
(Include
SMS)
1,130,000 47,000 1860 12,800 14,000
NOTE
3.4 Capacity Configuration of the BSC6900 GU
Table 3-13 lists the capacity of a BSC6900 GU. In this table, the BSC6900 GU is configured
with HW69 R15 boards.
Table 3-13 Capacity of a BSC6900 GU (HW69 R15 boards)
Typical
Configuration
Specifications
1 MPS (GSM)+3
EPSs (GSM)+2
EPSs (UMTS)
GSM in All-TDM
and BM/TC
Combined Mode
1 MPS (GSM)+3
EPSs (GSM)+2
EPSs (UMTS)
GSM in All-IP
Mode
1 MPS (UMTS)+4
EPSs (UMTS)+1
EPS (GSM)
GSM in All-TDM
and BM/TC
Combined Mode
1 MPS (UMTS)+4
EPSs (UMTS)+1
EPS (GSM)
GSM in All-IP
Mode
Maximum UMTS
traffic volume
(Erlang)
53,600 53,600 140,700 140,700
Maximum UMTS
PS (UL+DL) data
throughput
(Mbit/s)
12,800 12,800 33600 33,600
Maximum number
of NodeBs
1440 1440 3060 3060
Maximum number
of UMTS cells
2400 2400 5100 5100
Maximum number
of GSM TRXs
4096 8192 1536 3584
Maximum number
of equivalent
BHCA for GSM
(k)
5900 11,000 2625 6125
Maximum number
of active PDCHs
for GSM (MCS-9)
16,384 32,768 6144 14336

25
Typical
Configuration
Specifications
1 MPS (GSM)+3
EPSs (GSM)+2
EPSs (UMTS)
GSM in All-TDM
and BM/TC
Combined Mode
1 MPS (GSM)+3
EPSs (GSM)+2
EPSs (UMTS)
GSM in All-IP
Mode
1 MPS (UMTS)+4
EPSs (UMTS)+1
EPS (GSM)
GSM in All-TDM
and BM/TC
Combined Mode
1 MPS (UMTS)+4
EPSs (UMTS)+1
EPS (GSM)
GSM in All-IP
Mode
Maximum GSM
traffic volume
(Erlang)
24,000 45,000 9750 22750

Product Description 4 Operation and Maintenance
26
4 Operation and Maintenance
4.1 Overview
The BSC6900 provides convenient local maintenance and remote maintenance and supports
multiple flexible O&M modes.
The BSC6900 provides hardware-independent O&M functions such as security management,
fault management, alarm management, equipment management, and software management.
Users can use man-machine language (MML) commands to perform O&M and configuration
functions and use the graphical user interface (GUI) to perform O&M functions. This meets
the operational requirements from different users.
Figure 4-1 shows the O&M network of the BSC6900.
Figure 4-1 O&M network of the BSC6900

27
The O&M system of the BSC6900 adopts the browser/server (B/S) separated mode. The
OMUc board of the BSC6900 works as the server, and the LMT is used for local maintenance.
The iManager M2000 is the centralized O&M system, which is used for remote maintenance.
The alarm box connects to the LMT and provides audible and visible indications for alarms.
NOTE
The OMU boards described in this document refer to the OMUa, OMUb, and OMUc boards.
4.2 Benefits
Web-based LMT Improving User Experience
The O&M system of the BSC6900 uses the web-based LMT. You can connect the LMT to the
OMU board to perform O&M operations for the BSC6900 and to obtain the online help of the
LMT. All the operation results are displayed on the LMT through the web browser.
The web-based LMT does not require software installation and software upgrade, simplifying
user operations and improving user experience.
Diversified O&M Modes
The BSC6900 provides local maintenance and remote maintenance and supports multiple
O&M modes to meet the needs in various O&M scenarios.
The LMT for local maintenance can access the BSC6900 in the following ways:
 Through the port on the panel of the OMU board
 Through the virtual local area network (VLAN)
 Through the Intranet and Internet
The iManager M2000 for remote maintenance can access the BSC6900 in the following
ways:
 Through the VLAN
 Through the Intranet and Internet
Powerful Hardware Management Functions for Quickly Locating and Rectifying
Hardware Faults
The BSC6900 provides a prewarning mechanism for hardware faults, ensuring that sufficient
time is available to rectify the faults before services are interrupted.
The BSC6900 provides functions such as status query, data configuration, and status
management of internal devices.
When a hardware fault occurs, the BSC6900 alerts the user by generating alarms and flashing
indicators and provides suggestions to guide the user in troubleshooting. The alarm is cleared
upon the rectification of the fault.
The BSC6900 provides the functions of isolating a faulty part, such as activating or
deactivating the faulty part. When a faulty part needs to be replaced, the hot swap function
enables the quick power-on of the substitute, reducing the time in fault rectification.

28
In case of emergencies, you can reset the board to quickly rectify the fault.
Advanced Software Management Functions for Secure and Smooth Upgrades
The BSC6900 provides a remote upgrade tool, which enables the operator to upgrade the
software at the O&M center without interrupting ongoing services. The remote upgrade tool
provides the function of backing up crucial data in the system. When the upgrade fails,
version rollback can be performed immediately and the system returns to normal in a short
period.
After the upgrade is complete, a version consistency check is performed to ensure the version
correctness.
Rich Tracing and Detection Mechanisms for Reliably Monitoring the Network
Status
The BSC6900 provides the tracing and monitoring functions on multiple layers and multiple
levels to accurately locate faults. The signaling tracing functions include user tracing,
interface tracing, and message tracing.
The tracing messages are saved as files, which can be viewed through the review and tracing
functions of the LMT.
Easy Equipment Installation and Commissioning, and Efficient Network
Upgrade Scheme for Quick Network Deployment
Before delivery, boards and operating systems are installed in and common data is configured
for the Huawei BSC6900. In addition, the BSC6900 is correctly assembled and passes rigid
tests. You only need to install the cabinet and cables on site. After the hardware installation is
complete, you can load software and data files to commission the software and hardware.
The BSC6900 can be configured as one of the three variants through board adjustments and
software upgrades, facilitating the smooth evolution from GSM to GSM+UMTS and between
GSM+UMTS and UMTS. In addition, the BSC6900 provides the 2G/3G convergence
solution and protects the operator's investment.
Robust Security Operation Mechanism Preventing Misoperations
The BSC6900 provides a man-machine interface and prompts users to confirm an important
operation. This ensures that an operation is performed only when it is required and prevents
service interruptions caused by misoperations.

Product Description 5 Technical Specifications
29
5 Technical Specifications
5.1 Technical Specifications
5.1.1 Capacity Specifications
BSC6900 in
Independent or
Integrated Mode
Item Specification
BSC6900
GSM/BSC6900 GU
(GSM capacity)
Maximum number of equivalent
BHCA (k)
TDM: 5900
IP: 11,000
Traffic volume (Erlang) TDM: 24,000
IP: 45,000
Number of TRXs TDM: 4096
IP: 8192
Number of configured PDCHs TDM: 30,720
IP: 61,440
Number of active PDCHs
(MCS-9)
TDM: 16,384
IP: 32,768
Gb interface throughput (Mbit/s) TDM: 1536
IP: 3072
BSC6900 UMTS BHCA (k) 5300
BHCA (k)(Include SMS) 7000
Traffic volume (Erlang) 167,500
PS (UL+DL) Data Throughput
(Mbit/s)
40,000
Number of NodeBs 3060
Number of cells 5100

30
BSC6900 in
Independent or
Integrated Mode
Item Specification
BSC6900 GU (UMTS
capacity)
BHCA (k) 2630
BHCA (k)(Include SMS) 3120
Traffic volume (Erlang) 140,700
PS (UL+DL) Data Throughput
(Mbit/s)
33,600
Number of NodeBs 3060
Number of cells 5100
NOTE
This table provides the capacity specification of the BSC6900. On a live network, the actual capacity of
the BSC6900 is determined by the number of configured subracks and boards.
5.1.2 Structural Specifications
Item Specification
Cabinet standard
The structural design conforms to the IEC60297 and IEEE
standards.
Dimensions (H x W
x D)
N68E-22 cabinet: 2200 mm x 600 mm x 800 mm
N68E-21-N cabinet: 2130 mm x 600 mm x 800 mm
Height of the
available space
N68E-22 cabinet: 46 U
N68E-21-N cabinet: 44 U
Cabinet weight
N68E-22 cabinet: ≤ 320 kg
N68E-21-N cabinet: ≤ 380 kg
Load-bearing
capacity of the floor
in the equipment
room
≥ 450 kg/m2
5.1.3 Clock Specifications
Item Specification
Clock precision It meets the requirements for the stratum-3 clock.
Clock accuracy ±
4.6 x 10-6
Pull-in range ±
4.6 x 10-6

31
Item Specification
Maximum frequency offset 2 x 10-8
/day
Initial maximum frequency offset 1 x 10-8
5.1.4 Electrical Specifications
Sub-Item Specification
Power input –48 V DC
Power range –40 V to –57 V
Power consumption of a single
GSM subrack
MPS: ≤ 1300 W
EPS: ≤ 1300 W
TCS: ≤ 1000 W
UMTS subrack
In ATM transmission:
 MPS: ≤ 1700 W
 EPS: ≤ 1730 W
In IP transmission:
 MPS: ≤ 1490 W
 EPS: ≤ 1450 W
cabinet
The cabinet power consumption equals the sum of
power consumption of all subracks in the cabinet.
It is recommended that the power distribution system
provide a maximum of 5100 W power per cabinet to
facilitate capacity expansion.
NOTE
The power consumption specification of a GSM subrack is the maximum power consumption in
typical configurations. The power consumption specification of a UMTS subrack differs between the
ATM and IP transmission modes. In ATM transmission mode, the Iu interface uses unchannelized
STM-1 transmission, and the Iub interface uses channelized STM-1 transmission. In IP transmission
mode, the Iu and Iub interfaces use GE optical transmission. The power consumption in actual
networks depends on specific configurations.
You can calculate the power consumption of the cabinet in any subrack combination mode by using
the preceding specification.

32
5.1.5 Space Specifications
Figure 5-1 Space requirements for the equipment room
 If cables are routed overhead, the distance between the cabinet top and the ceiling of the
equipment room must be greater than or equal to 1000 mm.
 If cables are routed under the floor, the height of the ESD floor must be greater than or
equal to 200 mm.
 The spacing shown in Figure 5-1 is the minimum possible value. The actual spacing is
wider than that shown in Figure 5-1.
5.1.6 Environmental Specifications
Item Specification
Storage
Environment
Transportation
Environment
Operating Environment
Temperature
range
–40°
C to +70°
C –40°
C to +70°
C Long-term: 0°
C to 45°
C
Short-term: –5°
C to +55°
C
Humidity
range
10% RH to 100% RH 5% RH to 100% RH Long-term: 5% RH to 85%
RH
Short-term: 5% RH to 95%
RH
NOTE
The short-term operation refers to the operation with the duration not more than 96 hours at a time and
with the accumulative duration not more than 15 days a year.

33
5.1.7 Transmission Ports
Transmission Type Connector
E1/T1 DB44
Channelized STM-1/OC-3 LC/PC
Unchannelized STM-1/OC-3c LC/PC
FE RJ45
GE RJ45
LC/PC
5.1.8 Reliability Specifications
Item Specification
System availability > 99.999%
Mean time between failures (MTBF) ≥ 525,000 hours
Mean time to repair (MTTR) ≤ 1 hour
5.2 Compliance Standards
5.2.1 Power Supply Standard
Item Standard
Power supply ETS300 132-2
5.2.2 Grounding Standard
Item Standard
Grounding ETS300 253

34
5.2.3 Environment Standards
Item Standard
Noise ETS300 753
GR-63-CORE
5.2.4 Safety Standards
Item Standard
Earthquake-proofing ETS300 019-2-4-AMD
GR-63-CORE
YDN5083
Safety IEC60950, EN60950, UL60950
IEC60825-1
IEC60825-2
IEC60825-6
GB4943
GR-1089-CORE
Surge protection IEC 61024-1 (1993)
IEC 61312-1 (1995)
IEC 61000-4-5 (1995)
ITU-T K.11 (1993)
ITU-T K.27 (1996)
ITU-T K.41 (1998)
EN 300 386 (2000)
GR-1089-CORE (1999)
YDJ 26-89
GB 50057-94
YD5098-2001

35
5.2.5 EMC Standards
Item Standard
Electromagnetic
compatibility (EMC)
ETSI EN 300 386 V1.3.2 (2003-05)
CISPR 22 (1997)
IEC61000-4-2
IEC61000-4-3
IEC61000-4-4
IEC61000-4-5
IEC61000-4-6
IEC61000-4-29
GB9254-1998
FCC Part 15
NEBS Bellcore GR-1089-CORE issue 2
5.2.6 Environment Standards
Item Standard Class
Storage environment ETS300 019-1-1 CLASS 1.2
Transportation
environment
ETS300 019-1-2 CLASS 2.3
Operating environment ETS300 019-1-3 CLASS 3.1

Product Description AAcronyms and Abbreviations
36
A Acronyms and Abbreviations
3GPP Third Generation Partnership Project
AMR adaptive multirate
ATM Asynchronous Transfer Mode
BHCA busy hour call attempts
BIOS basic input/output system
BM/TC basic module/transcoder
BSC base station controller
BTS base transceiver station
CBC cell broadcast center
CHR call history record
CN core network
Co-RRM co-radio resource management
CPU central processing unit
CS circuit switched
DSP digital signal processor
EPR extended processing rack
EPS extended processing subrack
FE fast Ethernet
GE gigabit Ethernet
GSM Global System for Mobile communications

37
GUI graphical user interface
ICCP Internal Communication Control Plane
IP Internet Protocol
LMT local maintenance terminal
LTE Long Term Evolution
MAC Media Access Control
MGW media gateway
MME mobile management entity
MML Man-machine language
MPR main processing rack
MPS main processing subrack
MSC mobile switching center
MSP multiplex section protection
MTBF mean time between failures
MTTR mean time to repair
NAS non-access stratum
O&M operation and maintenance
OS operating system
PDCH packet data channel
PPP Point-to-Point Protocol
PS packet switched
RNC Radio Network Controller
RRM Radio Resource Management
SDH synchronous digital hierarchy
SGSN serving GPRS support node
SMLC serving mobile location center
SMP System management plane
STCP Service Transport Control Plane
STM-1 synchronous transport module level 1
TCH traffic channel
TCR transcoder rack
TCS transcoder subrack
TDM time division multiplexing

38
TRX transceiver
UE user equipment
UMTS Universal Mobile Telecommunications System
VLAN Virtual local area network

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