02 Msoftx3000 Hardware System Issue1.0

HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

www.huawei.com

Internal

MSOFTX3000 Hardware System

ISSUE 1.0

HUAWEI TECHNOLOGIES CO., LTD. Page 2All rights reserved

Upon completion of this course, you will be able to:

Understand MSOFTX3000 system structure

Master MSOFTX3000 board function

Understand concatenation and cables.


References

MSOFTX3000 Hardware Description Manual

MSOFTX3000 Hardware Installation Manual

MSOFTX3000 Technical Manual System Des

cription


Chapter 1 MSOFTX3000 OutlineChapter 1 MSOFTX3000 Outline

Chapter 2 Board FunctionChapter 2 Board Function

Chapter 3 Signaling PathChapter 3 Signaling Path

Chapter 4 Concatenation and CablesChapter 4 Concatenation and Cables


Chapter 1 Chapter 1 MSOFTX3000 OutlineMSOFTX3000 Outline

1.1 Device Introduction

1.2 System Structure


General DescriptionServing as the control component in the UMTS R4 CN, such as Mobile

Switching Center (MSC) Server, Gateway MSC (GMSC) Server and Tandem

Mobile Service Switching Center (TMSC) Server, and providing Service

Switching Point (SSP) function.

HLR SMCGMLC

SGSNMSOFTX3000MSOFTX3000

SCP

UMG8900 UMG8900RNC BSC

Mc Mc

Nc GsE/G

C/D E Lg

Iu_CS

A

Nb


MSOFTX3000 Cabinet

MSOFTX3000 adopts N68-22 cabinet

It includes integrated configuration and

Expansion configuration cabinet

600 mm (width)* 800 mm (depth)* 2200

mm (height)

Four frames per cabinet


Integrated Configuration

Cabinet

Expansion Configuration Cabinet Expansion Configuration Cabinet

MSOFTX3000 Cabinet

Expansion frame (9U)

Air deflector (2U)

Power distribution frame (2U)

Basic frame (9U)

Air deflector (2U)

Blank panel (2U)

Blank panel (2U)

KVMS (1U)

Cable through (1U)LAN Switch(1U)

LAN Switch(1U)

Cable through (1U)

Hard disk array (3U)

BAM (2U)

IGWB (2U)

IGWB (2U)

Blank panel (2U)


Air deflector (2U)



Air deflector (2U)


Air deflector (2U)


Air deflector (2U)


Air deflector (2U)



Air deflector (2U)


Air deflector (2U)


Air deflector (2U)


MSOFTX3000 Frame

The MSC SERVER UNIT frame is designed in conformity with the IEC297

standard and has the following features.

The frame is 19 inches wide and 8U high.

The front boards and back boards are plugged into the backplane of the

frame. All cables are led out of the frame from the back.

The frame accommodates 21 slots. The power boards (UPWR) occupy

four slots.

The frame enables temperature

detection and fan speed adjustment functions.


MSOFTX3000 FrameClassification

Basic frame

− The basic frame is configured in the fixed position in the integrated

configuration cabinet, providing clock interface, IP interface and E1

interface and implementing service processing.

WCDB

WCDB

0

0 1

WIFM

2

WIFM

3 4 5 6 7

WSMU

8 9 10

WIFM

11

WMGC

12

WMGC

13 14 15

1

WBFI

2

WBFI

3

WBAI

4

WBAI

5

WSIU

6

WHSC

7

WHSC

9

WSIU

8 10

WCKI

11 12 13 14 15

Backplane

Frontboards

Backboards

WBFI

WBFI

WAFM

WAFM

WCDB

WCDB

WCKI

WSMU

WIFM

WALU

16

UPWR

17 18 19 20

UPWR

16

UPWR

17 18 19 20

UPWR


MSOFTX3000 Frame Expansion frame

− The expansion frame is the service processing frame customized

according to the subscriber capacity, and it coordinates with the

basic frame to implement service processing.

WCSU

WCSU

WEPI

WEPI

0

0 1

WCSU

2

WCSU

3 4 5 6 7

WSMU

8 9 10

WCCU

11

WVDB

12

WVDB

13 14 15

1

WEPI

2

WEPI

3

WEPI

4

WEPI

5

WSIU

6

WHSC

7

WHSC

9

WSIU

8 10 11 12 13 14 15

Backboards

Front

boards

WCSU

WCSU

WBSG

WBSG

WSMU

WCCU

WALU

16

UPWR

17 18 19 20

UPWR

16

UPWR

17 18 19 20

UPWR

Backplane


Connection of Different Frames

Frame 0#

Frame 1#

Frame 2#

Frame 9#

LAN Switch inplane 1

LAN Switch in plane 0

Standby iGWB

FE

GEActive iGWB

BAM

FE

Host Background

To the billing center

WS WS WS

HubTo the network

Management center

FE


Emergency WS

Frame 0#

Frame 1#

Frame 2#

Frame 9#

LAN Switch inplane 1

LAN Switch in plane 0

Standby iGWB

FE

GEActive iGWB

BAM

FE

Host Background


WS WS WS

HubTo the network

Management center

FE


Emergency WS


Chapter 1 Chapter 1 MSOFTX3000 OutlineMSOFTX3000 Outline

1.1 Device Introduction

1.2 System Structure


Logical Structure of the System

NMS

WEPIWEPI

WSIU/WSMUWSIU/WSMU

WIFMWIFM

WAFMWAFM

WCKIWCKI

CPCCPC

WCCUWCCUWBSGWBSG

WHSC

WMGCWMGC

BUS

iGWBiGWB

BAM

IM SLLPM SPM OMM

LANSwitch

WS

WS

IP

ATM

BITS

E1

BC

0#

9#

SSM

WCDB

WVDB

NMS

WEPIWEPI

WSIU/WSMUWSIU/WSMU

WIFMWIFM

WAFMWAFM

WCKIWCKI

CPCCPC

WCCUWCCUWBSGWBSG

WHSC

WMGCWMGC

BUS

iGWBiGWB

BAM

IM SLLPM SPM OMM

LANSwitch

WS

WS

IP

ATM

BITS

E1

BC

0#

9#

SSM

WCDB

WVDB







Chapter 2 Chapter 2 Board FunctionBoard Function

2.1 System Support Module

2.2 Interface Module

2.3 Low Layer Processing Module

2.4 Service Processing Module

2.5 Other Boards

2.6 Rules of Boards Configuration


System Support Module

NMS

WEPIWEPI

WSIU/WSMUWSIU/WSMU

WIFMWIFM

WAFMWAFM

WCKIWCKI

CPCCPC

WCCUWCCUWBSGWBSG

WHSC

WMGCWMGC

BUS

iGWBiGWB

BAM

IM SLLPM SPM OMM

LANSwitch

WS

WS

IP

ATM

BITS

E1

BC

0#

9#

SSM

WCDB

WVDB

NMS

WEPIWEPI

WSIU/WSMUWSIU/WSMU

WIFMWIFM

WAFMWAFM

WCKIWCKI

CPCCPC

WCCUWCCUWBSGWBSG

WHSC

WMGCWMGC

BUS

iGWBiGWB

BAM

IM SLLPM SPM OMM

LANSwitch

WS

WS

IP

ATM

BITS

E1

BC

0#

9#

SSM

WCDB

WVDB


WSMUThe System Management Unit (WSMU) is the main control

board of the MSC SERVER UNIT frame Configuring shared

resource bus and managing its status.

Managing all boards in the frame and get boards work

status and report to the BAM

Controlling the indicators on the front panel of the

WALU

Loading and managing system programs and data

The WSMU is a front board installed in slots 6 and 8 in

each frame

One-plus-one backup mode

LINK ACT

RST

HUAWEI

CO

M

ALM RUN

DOMA DOMB

WSMU


WSMU － Share Resource BUS WSMU will manage all boards in same frame and help boards (WIFM/W

AFM/WBSG/WSGU/WCCU/WCSU/WCDB/WVDB ） to load relative da

ta and application through Share resource BUS.

WSIU

WHSC

WSIU

WHSC

WSMU

SLOTNUMBER

Shareresource BUS

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

WSMU

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT


WSMU － Ethernet BUS

Signaling process unit and service process unit ( WCDB, WVDB,

WCCU, WCSU, WIFM, WBSG) will use Ethernet BUS to transmit

signaling and service information.

W

WSIU

WHSC

WSIU

WHSC

WWSMU

WSIU

WHSC

WSIU

WHSC

Ethernet BUS B

Ethernet BUS A

WSMU

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT

FRONT


WSMU － Serial Port BUS

The Serial port BUS controls those boards in the frame that are

controlled by CPU but not connected to the shared resource bus, such

as WCKI, WEPI and WALU.

WSMU

WALU

WSIU

Serial port BUS

WHSC

WSIU

WHSC

WSMU

WSMU

WALU

WSIU

WHSC

WSIU

WHSC

WSMU

WSMU

WALU

WSIU

WHSC

WSIU

WHSC

WSMU

BACK

BACK

BACK

BACK

BACK

BACK

BACK

BACK

BACK

BACK

BACK

BACK


WSIU

It is fixedly installed in back slots 6 and 8 in each frame.

Providing Ethernet interface to the WSMU. It is configured

correspondingly to the WSMU one by one

providing physical interfaces to two asynchronous serial

ports

Implementing frame number identification through setting

DIP switch

one-plus-one backup mode

HD

10/1

00B

T2

CO

M3+

CO

M3

10/1

00B

T1

WSIU

HUAWEI


WSIU-Frame Number Switch

offononoffonononon9

onononoffonononon8

offoffoffononononon7

onoffoffononononon6

offonoffononononon5

ononoffononononon4

offoffonononononon3

onoffonononononon2

offononononononon1

onononononononon0

12345678Frame Num


WHSCThe Hot-Swap and Control unit (WHSC) is It is fixedly installed in back slo

ts 7 and 9 in each frame.

Bridging left and right shared resource buses, for the purpose of ass

uring that the WSMUs in slots 6 and 8 can respectively manage the f

ront boards

Controlling hot-swap of boards

Providing two pairs of heartbeat detection interfaces for the WSMU/

WHSC

Providing a 10M/100M compatible Ethernet connection between the

active WSMU and the standby one

Providing six FE ports externally

1+1 backup mode

10/1

00B

T1

DOMA DOMB

10/1

00B

T210

/100

BT3

10/1

00B

T410

/100

BT5

10/1

00B

T6

HUAWEI

WHSC


WHSC － Ethernet Double Plane Structure

WHSC 0

WSIU 0

WSMU0

WSIU1

WSMU1

WHSC 1

External cable

WHSC 0 WHSC 1

WSIU 0 WSIU1

WSMU0

WSMU1

intra cableintra cable

LANSwitch 0 LANSwitch 1

intra cable intra cable

External cableExternal cable

External cable

intra cableintra cable intra cable intra cable







2.5 Other Boards



Interface Module

NMS

WEPIWEPI

WSIU/WSMUWSIU/WSMU

WIFMWIFM

WAFMWAFM

WCKIWCKI

CPCCPC

WCCUWCCUWBSGWBSG

WHSC

WMGCWMGC

BUS

iGWBiGWB

BAM

IM SLLPM SPM OMM

LANSwitch

WS

WS

IP

ATM

BITS

E1

BC

0#

9#

SSM

WCDB

WVDB

NMS

WEPIWEPI

WSIU/WSMUWSIU/WSMU

WIFMWIFM

WAFMWAFM

WCKIWCKI

CPCCPC

WCCUWCCUWBSGWBSG

WHSC

WMGCWMGC

BUS

iGWBiGWB

BAM

IM SLLPM SPM OMM

LANSwitch

WS

WS

IP

ATM

BITS

E1

BC

0#

9#

SSM

WCDB

WVDB


WIFM/WBFIWIFM

The IP Forward Module (WIFM) is used to receive

and transmit IP packets, process Media Access

Control (MAC) layer messages and distribute IP

messages.

WBFI

The Back Insert FE Interface Unit (WBFI) is the

back interface board of the WIFM. It is used to

perform FE driving, and provide external physical

interfaces for the WIFM. It is configured

correspondingly to the WIFM one by one.

The WBFI works in 1+1 backup mode.

LINK ACT

HUAWEI

CO

M

ALM RUN

RST

WIFM

10/1

00B

T

HUAWEI

WBFI


WAFM/WBAI

WAFM

Along with the WBAI, provides ATM interface to

perform ATM Adaptation Layer 5 (ATM AAL5)

Segmentation And Reassembly (SAR) processing

Distribute the packets to the proper WBSG according

to the Permanent Virtual Connection (PVC)

configurations.

WBAI

It is used to perform ATM driving and provide ATM

STM-1 physical interfaces.

The WBAI works in 1+1 backup mode.

TX

RXMM

HUAWEI

WBAI

LINK ACT

HUAWEI

CO

M

ALM RUN

RST

WAFM


WCKI The WCKI is used to provide stratum-2 and stratum-3 standard synchroni

zation clocks for system networking purpose and stable and precise clock

signals to the system.

The WCKI works in 1+1 hot-backup mode.

The WCKI is installed in the back slots 13 and 15 of the basic subrack. Ea

ch WCKI occupies two board slots.

WCKI

(M)

WCKI

(S)

WEPI

(M)

WEPI

(S)

WEPI

(M)

WEPI

(S)

WEPI

(M)

WEPI

(S)

BITS BITS

8k clock cable 8k clock cable

Basic subrack

Expansion subrack

···


WEPI WEPI

Providing narrowband signaling physical interfaces for the WCSU. It is

configured correspondingly to the WCSU one by one.

Processing MTP1 physical layer messages.

Transferring system clock signals and providing clock synchronization in

the frame.

Working with the WCSU to implement active/standby switchover

through H.110 bus.


WSMU

H.110 bus

WSIU

WHSC

BB

WSIU

WHSC

WSMU

BB

BB

BB

BB

BB

BB

BB

BB

BB

BB

BB

FB

FB

FB

FB

FB

FB

FB

FB

FB

FB

FB

FB

WSMU

H.110 bus

WSIU

WHSC

BB

WSIU

WHSC

WSMU

BB: Back board

FB: Front board

BB

BB

BB

BB

BB

BB

BB

BB

BB

BB

BB

FB

FB

FB

FB

FB

FB

FB

FB

FB

FB

FB

FB

WEPI － H.110 Bus

Realize WCSU active/standby switchover

Transferring system clock signals for other boards in the same frame

WCSU0

WEPI 0

8×E1

WEPI1

WCSU1

Intra HW bus







2.5 Other Boards



Low-layer Signaling Processing Module

NMS

WEPIWEPI

WSIU/WSMUWSIU/WSMU

WIFMWIFM

WAFMWAFM

WCKIWCKI

CPCCPC

WCCUWCCUWBSGWBSG

WHSC

WMGCWMGC

BUS

iGWBiGWB

BAM

IM SLLPM SPM OMM

LANSwitch

WS

WS

IP

ATM

BITS

E1

BC

0#

9#

SSM

WCDB

WVDB

NMS

WEPIWEPI

WSIU/WSMUWSIU/WSMU

WIFMWIFM

WAFMWAFM

WCKIWCKI

CPCCPC

WCCUWCCUWBSGWBSG

WHSC

WMGCWMGC

BUS

iGWBiGWB

BAM

IM SLLPM SPM OMM

LANSwitch

WS

WS

IP

ATM

BITS

E1

BC

0#

9#

SSM

WCDB

WVDB


WBSGMainly used to process IP packets after the WIFM level 1 distribution

Implement coding/decoding for lower layer signaling transmission protocols

(UDP, TCP, SIGTRAN, MTP3 and MTP3b) and H.248 bearer control protocol

Perform level 2 message distribution to corresponding service processing units

for transaction layer/service layer processing.

M3UA

MTP3

SCTP/TCP/UDP

SAAL MTP3b H.248

IP Driver

MAC/IP

ATM Driver

AAL5SAR

WBSG

WIFM

WAFMWBAI

WBFI







2.5 Other Boards



Service Process Module

NMS

WEPIWEPI

WSIU/WSMUWSIU/WSMU

WIFMWIFM

WAFMWAFM

WCKIWCKI

CPCCPC

WCCUWCCUWBSGWBSG

WHSC

WMGCWMGC

BUS

iGWBiGWB

BAM

IM SLLPM SPM OMM

LANSwitch

WS

WS

IP

ATM

BITS

E1

BC

0#

9#

SSM

WCDB

WVDB

NMS

WEPIWEPI

WSIU/WSMUWSIU/WSMU

WIFMWIFM

WAFMWAFM

WCKIWCKI

CPCCPC

WCCUWCCUWBSGWBSG

WHSC

WMGCWMGC

BUS

iGWBiGWB

BAM

IM SLLPM SPM OMM

LANSwitch

WS

WS

IP

ATM

BITS

E1

BC

0#

9#

SSM

WCDB

WVDB


WCCU/WCSU The Calling Control Unit/Calling Control and Signaling process Unit

(WCCU/WCSU) is responsible for call control and protocol processing of

MTP3, MTP3b, M3UA, ISUP, BSSAP, MAP and CAP.

SCCP

TCAP

ISUP

RANAP

BSSAP+

MAP

CAP

MTP3

MTP3b

BICC H.248

M3UA

BSSAP

MTP2

WEPISCTP

SAALIP

M3UA MTP3b

WBSG

WCSU

WCCU

H.248

SCCP

TCAP

ISUP

RANAP

BSSAP+

MAP

CAP

MTP3

MTP3b

BICC H.248

M3UA

BSSAP

MTP2

WEPISCTP

SAALIP

M3UA MTP3b

WBSG

WCSU

WCCU

H.248


WCDB

It provides UMG resource management, outgoing trunk selection, and WVD

B distribution agent management (MSRN number allocation, WVDB mainten

ance command forwarding) functions.

The WCDB contains global data which can be accessed by all WCCUs/WCS

Us and WVDBs.

Because the WCDB is an accessed center, its load is relatively large. In

small-capacity configuration mode, its functions can be implemented by

one pair of WCDBs.

In a large-capacity configuration mode, different functions must be distrib

uted to different WCDBs.


WVDB The VLR Database Board (WVDB) is a front board used to store the subscrip

tion data of mobile subscribers.

In a large-capacity application, multiple pairs of WVDBs are required to store

the subscription data.

The subscription information of one subscriber is stored in the same pair

of WVDBs.

The principles for distributing subscriber data on different WVDBs have b

een described in the Section about WCDB (also named WVDB distributio

n agent function).

Such distribution is transparent for the WCCU/WCSU service layer.


WMGC

WMGC provides gateway registration, internal link status maintenance,

gateway status and capability auditing, and gateway exception handling

functions.

One-plus-one backup mode







2.5 Other Boards



WALU

The Alarm Unit (WALU) is a front board installed fixedly in slot 16 in

each frame. Its functions are as follows:

Acting as a slave node, communicating with the master node

(WSMU) through serial port bus, and controlling indicator under the

instructions of the WSMU.

Monitoring the temperature of the chassis and reporting it to the

WSMU through serial port bus.

Collecting and logically integrating fault detection signals and in-

position signals of the four power modules, reporting them to the

WSMU through serial port bus, independently implementing the

display of the working status and in-position status of the power

boards by the indicators.


UPWR

The UPWRs are installed in front and back slots 17, 18, 19, and 20. Th

ey provide power supply to all the boards in the frame.

Two-plus-two backup mode.







2.5 Other Boards



Rules of Boards Configuration

WSMU, WSIU, WHSC, WALU, UPWR are mandatory and are configur

ed in fixed slots.

0 ～ 5,10 ～ 15 slots are used to install service boards (front boards) a

nd interface boards (back boards). (0,1), (2,3), (4,5), (10,11), (12,13),

(14,15) are slots pair. It is recommended that active and standby board

s are installed in one pair of slots.

When TDM is used, WCKIs (back boards) are configured fixedly in slot

s 13 and 15 of the basic frame, and each board occupies two slots. It i

s recommended to insert the WEPIs (back boards) in slots 0 and 1 bef

ore other slots.

One pair of WMGCs can support the maximum capacity of the system.

They are installed in basic frame.

One pair of WCDBs can support up to 1,000,000 subscribers. The syst

em supports two pairs of WCDBs at maximum. They are installed in ba

sic frame.







Signaling Processing Path over TDM

WSMU

WSIU

WHSC

WEPI

WSIU

WEPI

WCSU

WSMU

WCSU

WCCU

WCCU

WHSC

Ethernet BUS

E1

H.110 BUS

Core LAN Switch Core LAN Switch

FE FE

FRAME A


Signaling Processing Path over IP

WSMU

WSIU

WHSC

WBFI

WSIU

WBFI

WIFM

WSMU

WIFM

WMGC

WMGC

WHSC

Ethernet Bus

FE

Shared Resource Bus


FE FE

FRAME A

WBSG

WBSG

WCCU

WCCU

FE

Service_change

Other Message


Signaling Processing Path over ATM

WSMU

WSIU

WHSC

WBAI

WSIU

WBAI

WAFM

WSMU

WAFM

WMGC

WMGC

WHSC

Ethernet Bus

ATM STM-1

Shared Resource Bus


FE FE

FRAME A

WBSG

WBSG

WCCU

WCCU

ATM STM-1

Service_change

Other message


Signaling Process Flow Summary

TDM:

WEPI→CPC→WCCU

IP:

WBFI→WIFM→WBSG→WMGC

WBFI→WIFM→WBSG→WCCU

ATM:

WBAI→WAFM→WBSG→WMGC

WBAI→WAFM→WBSG→WCCU

ReviewReview


MSOFTX3000 Locks Clock Signal of Reference Source

WCKI

WEPI

WCKI

WEPI

E1

Basic frame

BITS1

MS¸

H.110 BUS

MS

BI

S0

T


Expansion Frame Locks Clock Signal of Basic Frame

WEPI

WEPI

Expansion frame

MS¸

H.110 BUS

WCKI

WEPI

WCKI

WEPIMS¸MS¸

WEPI

WEPIMS¸

Basic frame


Alarm Path

WSMUS

WALU

WSIU

Serial Port Bus

WHSC

WBAI

WSIU

WHSC

WBFI

UPWR

UPWR

WSMUM

UPWR

UPWR

WAFM

WIFM

Shared ResourceBus B

Shared ResourceBus B

BAM

Back

Board

Back

Board

Back

Board

Back

Board

Back

Board

Back

Board

Back

Board

Back

Board


Charging Path

HSC

WCCU/WCSU

Host bill pool

WCCU/WCSU

Host bill pool

LAN

iGWB Billing Center/

Billing Collector

HSC


Questions

How many boards are there in

MSOFTX3000?

What’s the function of each board?







Connection between WHSC and LAN Switch

The ports labeled 10/100BT6 at the uppermost position of the active and

standby WHSC boards are connected to the active and standby LAN

Switches respectively through straight through network cables

LAN SwitchLAN Switch


Connection between WHSC and WSIU Straight through network cable is used as FE signal cable to connect

the WHSC and the WSIU.


Server/Switcher Cables Server/switcher cables include keyboard cable, mouse cable and display

cable delivered along with the device.

The connection relations are “BAM-PC1”, ”iGWB0-PC2” and “iGWB1-PC3”.


Clock Cable Distribution of MSOFTX3000

WCKI

(M)

WCKI

(S)

WEPI

(M)

WEPI

(S)

WEPI

(M)

WEPI

(S)

WEPI

(M)

WEPI

(S)

BITS BITS

8k CLOCK CABLE 8k CLOCK CABLE

BASIC FRAME

SERVICE FRAME

···


Installation of External Clock Cable

The external clock cable is used to connect external BITS clock device

The 75 ohm SMB connector is adopted as the cable connector


Installation of External Clock Cable

1 2

3 4

5 6

7 8

9 10

11 12

13 14

15 16

BITS1BITS2

LINE1

LINE2

WCKI

1 2

3 4

5 6

7 8

9 10

11 12

13 14

15 16

BITS1BITS2

LINE1

LINE2

WCKI BITS1 BITS2


Installation of Intra Clock Cable Connection of 2M clock cable


Installation of Intra Clock Cable

WCKI board provides other frames not configured with clock boards

with 16 channels of 8 kHz clock sources through 8 kHz internal clock

cable,


Installation of Monitoring Cable one end of the cable is connected to the serial port socket of the power

distribution monitor board behind the power distribution frame, and the

other end is connected to the monitor port COM3 of WSIU board.


Summary

Understand MSOFTX3000 system structure

Master MSOFTX3000 board function

Understand concatenation and cables

ReviewReview

www.huawei.com

Thank You

02 Msoftx3000 Hardware System Issue1.0

Documents

clock interface

service processing frame

narrowband interface

e1 interface

service processing moduleomm

atm interface dispatch

interface modulesllpm

clock boards