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Huawei Confidential. All Rights Reserved
ORE002101 CDMA2000 BSC
Hardware System
ISSUE 1.0
1 Internal Use
ObjectivesObjectives
Upon completion this course, you will beable to: Understand the hardware structure of BSC
system.
Understand the functionality of BSCsubrack.
Understand the functionality of each boardin the subrack.
Understand the clock system in BSCsystem.
Understand the signal flow in the BSCsystem.
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2 Internal Use
ChapterChapter 11 OverviewOverview
Chapter 2 CSWS
Chapter 3 CIPS
Chapter 4 CRPS
Chapter 5 Clock System
Chapter 6 Windup
3 Internal Use
A CDMA NetworkA CDMA Network
BSC/PCF
BSC/PCF
PDSN
MSC
PLMN A 3 / A 7
A1/A2
A 1 / A 2
A10/A11
BTSSoftsite
MS
MS
Internet
Abis
Abis
PSTNISDNBTS
A 1 0
/ A 1 1
MS: Mobile StationPCF: Packet data Control Function
PDSN: Packet Data Service NodeBSC: Base Station Controller
MSC: Mobile Switching Center BTS: Base Transceiver Station
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4 Internal Use
Rack DistributionRack Distribution
Large capacity BSC is divided into following functionalblocks. In general each block corresponds to singlesubrack. These are:
CDMA Switch Subrack (CSWS)
CDMA Integrated Processing Subrack (CIPS)
CDMA Resource and Packet Subrack (CRPS)
CDMA Packet Module Subrack (CPMS)
CLocK processing Module (CLKM)
CDMA Integrated Management System (CIMS)
5 Internal Use
Rack DistributionRack Distribution
To/from MSC
To / from PDSN
Optical fiber
To / from NMS
LAN
E1
GE
Ethernet
Optical fiber
Optical fiber
CIPS
CIMS
CPMS
CRPS
CSWS
CLKM
To / from PDSN
GE
To/from BTS E1
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6 Internal Use
Configuration for 1.2 Million SubscribersConfiguration for 1.2 Million Subscribers
BHCA: 2400k
Voice traffic volume: 24,000Erl
Um interface: 54,000TCE
A-interface: 38400CIC,1280E1
Abis interface: 1280E1
3840 Sector Carriers
1,200k Voice Subscribers(0.02Erl/sub)
70,000 PPP connections
5,000 active PPP connections
Total flow of packet data: 400Mbps
7 Internal Use
Hardware StructureHardware StructurePower distribution box
Cabling Through
Air guide subrackFan box
Cable trough
Air guide subrack
Fan boxCable trough
Keyboard
Dummy panel
Lanswitch
Dummy Panel
CLKM
Lanswitch
BAM Server
BAM Server BAM Server
LCD
CSWS
CRPS
CLKM
Cabling though
Dummy panel
Air guide subrackFan box
Cable trough
Power distribution box
Fan boxCable trough
Fan boxCable trough
Air guide subrack
CIPS/ CPMS
CIPS/ CPMS
CIPS
CCTR (CDMA
Controller Rack)
CBUR (CDMABUsiness Rack)
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8 Internal Use
Typical Hardware ConfigurationTypical Hardware Configuration
CIMS××××1
CPMS××××4
CRPS××××1
CIPS××××40
CSWS××××1
CLKM××××1
151,200,000Subs((((0.02Erl/sub))))
CIMS××××1
CPMS××××1
CRPS××××1
CIPS××××10
CSWS××××1
CLKM××××1
5300,000 Subs((((0.02Erl/sub))))
Number of SubracksNumber of CabinetsCapacity
9 Internal Use
Chapter 1 Overview
ChapterChapter 2 CSWS2 CSWS
Chapter 3 CIPS
Chapter 4 CRPS
Chapter 5 Clock System
Chapter 6 Windup
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10 Internal Use
Boards Position in CSWSBoards Position in CSWS
14131211109876543210
CN
ET
CN
ET
CL
PC
CL
PC
CM
PU
CM
PU
CL
PC
CL
PC
CL
PC
CL
PC
CL
PC
CL
PC
CL
PC
CL
PC
11 Internal Use
Functional Diagram of CSWSFunctional Diagram of CSWS
CLPC
CLPC
CNET
Other subracksOther subracks
Other subracksOther subracks
BAMBAMCMPU
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12 Internal Use
CLPCCLPC
Controlling unit of line interface card
Provide eight 155Mbps ATM-over-SDH optical interfaces
Guarantee the ATM QoS
CLPC is responsible for:
13 Internal Use
CLPC Board AppearanceCLPC Board Appearance
I/Ointerfaceunit
I/Ointerfaceunit
RUN
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14 Internal Use
CNETCNET
Fast switching of fixed length-packets
40 switching network ports
Synchronization clock function
CNET is responsible for:
15 Internal Use
CNET Board AppearanceCNET Board Appearance
Clockmodule
RUNCLKACT
CLK IN0
CLK IN1
CLK OUT0
CLK OUT1CLK IN2CLK IN3
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16 Internal Use
CMPUCMPU
Managing & allocating the resources of CNET
Management proxy for other subracks
Managing & maintaining the boards in CSWS
CMPU is responsible for:
Controls the active/standby switch over
17 Internal Use
CMPU Board AppearanceCMPU Board Appearance
IDE Hard Disk
RUNALMACT
RESET
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18 Internal Use
Traffic Flow in CSWSTraffic Flow in CSWS
CCCC
MMMM
UUUU
XXXX
CCCC
MMMM
UUUU
XXXX
CCCC
NNNN
EEEE
TTTT
CCCC
LLLL
PPPP
CCCC
19 Internal Use
Maintenance Flow in CSWSMaintenance Flow in CSWS
CCCC
LLLL
PPPP
CCCC
CCCC
NNNN
EEEE
TTTT
CCCC
MMMM
UUUU
XXXX
CCCC
MMMM
PPPP
UUUU
BAM
Bus
Bus
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20 Internal Use
Chapter 1 Overview
Chapter 2 CSWS
ChapterChapter 3 CIPS3 CIPS
Chapter 4 CRPS
Chapter 5 Clock System
Chapter 6 Windup
21 Internal Use
Functional Diagram of CIPSFunctional Diagram of CIPS
Abis Physical interface
Service frame selection, frame allocation
Multiplexing/Demultiplxexing
Speech encodingand decoding
Signalingprocessing
B T S
B T S
A1/A2 physical
interface
Circuit dataprocessing
M S C
M S C
C R P S / C P M S
C R P S / C P M S
P a ck e t
t o C R P S / C P M S
P a ck e t
t o C R P S / C P M S
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22 Internal Use
Boards Position in CIPSBoards Position in CIPS
1514131211109876543210
C
AI
E
C
IW
F
C
SP
U
C
SP
U
C
LA
P
C
EV
C
C
EV
C
C
MU
X
C
MU
X
C
EV
C
C
EV
C
C
IW
F
C
FM
R
C
FM
R
C
FM
R
C
BI
E
Note: CXIE/CBIE/COIE can provide the Abis interface.
CAIE/CSTU can provide the A1/A2 interface.
Note: CXIE/CBIE/COIE can provide the Abis interface.
CAIE/CSTU can provide the A1/A2 interface.
23 Internal Use
CMUXCMUX
The switching & multiplexing functions of ATM services
Synchronization clock function
Manages & monitors the software loading of all boards in
CIPS
Monitors the power of subrack, fan box and environment
operating status
CMUX is responsible for:
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24 Internal Use
CMUX Board AppearanceCMUX Board Appearance
ETH
1PPS
COM1
COM2
¹â¿Û°å
RUN
ALM
ACT
RESET
TX
RX
Optical Module
25 Internal Use
CBIECBIE
32 standard E1/T1 interfaces
Providing a processing capability of 32 E1/T1 IMAs andsupporting pure ATM over E1 mode (UNI mode)
the channels for inter-working between CIPS and CRPS(Small capacity BSC)
CBIE is responsible for:
Supporting Fractional ATM function
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26 Internal Use
IMA in CBIEIMA in CBIE
1#E1
2#E1
n#E1… ...
IMAChip
IMAChip
E1InterfaceModule
IMA ProcessingModule
IMA ProcessingModule
E1Interface
Module
High-rate ATM flow High-rate ATM flow
IMA: Inverse Multiplexing on ATM
27 Internal Use
CBIE BoardCBIE Board ApperanceApperance
J18
RUN
ALM
ACT
CLK1
E1/T1
CLK2
E1/T1
E1/T1
E1/T1
S14S12
S13
S11
S10
S6
S5
S15
S16
S9
S8
S7
S17
J19 J18
J21
To BTS
To BTS
To BTS
To BTS
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28 Internal Use
CFMRCFMR
Selection/DistributionSelection/Distribution
BTS1 BTS2
Power controlPower control
ServiceFrame
ServiceFrame
Frame protocolprocessing
Frame protocolprocessing
Frame protocolprocessing
Frame protocolprocessing
Best Frame
Multiplexing/DemultiplexingMultiplexing/Demultiplexing
LAC SARLAC SAR
LAC PDU
TRAU frameTRAU frame RLPRLP
CSPUCSPU CEVCCEVC CPPUCPPU
29 Internal Use
CFMR Board AppearanceCFMR Board Appearance
RUN
ALM
ACT
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30 Internal Use
CEVCCEVC
Supports three types of coding: EVRC, QCELP8K andQCELP13K
Perform ISLP rate adaptation for circuit data servicesbelow 64Kbps
Checks and inserts DTMF signals
Provides the echo cancellation function
between BSC & MSC (CEVD could not support this )
31 Internal Use
CIWFCIWF
Asynchronous data processing
Facsimile G3 processing
Analog facsimile processing
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32 Internal Use
CLAPCLAP
Process the A1/A2 signaling (Layer2)
Measure, maintain and troubleshoot the A1/A2 signaling
33 Internal Use
CSPUCSPU
Process the upper-layer signaling including:
Um interface
Abis interface
A1/A2 interface
A3 interface
A7 interface
A9 interface
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34 Internal Use
CAIECAIE
Provide 32 E1/T1 interfaces
Clock extraction
35 Internal Use
CAIE Board AppearanceCAIE Board Appearance
S5 S4 S9 S8
S6
S7
S11
S12S15S18
S3 S2 S16 S17 S10 S13
J18
RUN
ALM
ACT
CLK1
E1/T1
CLK2
E1/T1
E1/T1
E1/T1
MSC
To GCKP
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36 Internal Use
Voice Traffic Flow in CIPSVoice Traffic Flow in CIPS
CBIE CFMR CMUX CEVC CAIE
ATM Bus
Extended TDM Bus
TDM Bus
37 Internal Use
Packet Traffic Flow in CIPSPacket Traffic Flow in CIPS
CMUXCBIE CFMR
CBTSCRPS
ATM Bus
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38 Internal Use
Circuit Traffic Flow in CIPSCircuit Traffic Flow in CIPS
CEVCCIWFCBIE CFMR CMUX
To CBTS
CAIE
ATM Bus
Expand TDM Bus
TDM BUS
39 Internal Use
Voice Signaling Flow in CIPSVoice Signaling Flow in CIPS
CBIE CFMR CSPU CMUX CAIE
ATM BUS
Expand TDM Bus
TDM BUS
CLAP
Out-band signalingIn-band signaling
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40 Internal Use
Packet Signaling Flow in CIPSPacket Signaling Flow in CIPS
CBIE CFMR CSPU
ATM Bus
Outband
signaling
To CRPS
Inband signaling
To CBTS
CMUX
41 Internal Use
Circuit Signaling Flow in CIPSCircuit Signaling Flow in CIPS
CBIE CFMR CSPU
ATM Bus
Out-band signaling
In-band signaling
To CBTS
CIWF
CLAP
CAIECMUX
ATM Bus
Expand TDM Bus
TDM BUS
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42 Internal Use
Functional Diagram of DO CIPSFunctional Diagram of DO CIPS
Abis Physical interface
Service frame selection, frame allocation
Multiplexing/Demultiplxexing
Signalingprocessing
B
T S
B
T S
C R P
S / C P M S
C R P
S / C P M S
P a ck e t t o C R P
S / C P M S
P a ck e t t o C R P
S / C P M S
Overview
43 Internal Use
Boards Position in DO CIPSBoards Position in DO CIPS
1514131211109876543210
CB
IE
CF
MR
CS
PU
CS
PU
CF
MR
CF
MR
CF
MR
CM
UX
CM
UX
CF
MR
CF
MR
CF
MR
CF
MR
CF
MR
CF
MR
CB
IE
Overview
Note: CXIE/CBIE/COIE can provide the Abis interface.
CAIE/CSTU can provide the A1/A2 interface.
Note: CXIE/CBIE/COIE can provide the Abis interface.
CAIE/CSTU can provide the A1/A2 interface.
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44 Internal Use
Chapter 1 Overview
Chapter 2 CSWS
Chapter 3 CIPS
ChapterChapter 4 CRPS4 CRPS
Chapter 5 Clock System
Chapter 6 Windup
45 Internal Use
Functional Diagram of CRPSFunctional Diagram of CRPS
Provide periodicaltime synchronization
Packet dataservice processing
Provide A3/A7
physical interface
Resource
management
From CIPS
From original CIPS
To CIPSFrom CLKM
To PDSN
To target CIPS
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46 Internal Use
Boards Position in CRPSBoards Position in CRPS
1514131211109876543210
C
XIE
C
PPU
C
PPU
C
BPU
C
HAC
C
MUX
C
MUX
C
HAC
C
PCU
C
PCU
C
RMU
C
RMU
C
BPU
C
XIE
47 Internal Use
CMUXCMUX
Manage & maintain the boards in CRPS
Provide RFN for the system
Note:
The CMUX in the CRPS is the same as the CMUX in the CIPS.
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48 Internal Use
CBIECBIE
Provide inter-BSC A3/A7 interface
Offer 32 standard E1s/T1s
Note: The CBIE boards in CRPS and CIPS are the same
49 Internal Use
CRMUCRMU
Process the A3, A7 and A9 interfaces signaling
Maintenance management and distribution of the
A2, A3 and A8 interface resources
Note:
The CRMU hardware structure is the same as that of CSPU, so the
indicator meaning of CRMU are also the same.
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50 Internal Use
CPPUCPPU
Store and transfer the data packets
Work in load sharing to achieve resource
pool mechanism
Note: The CPPU hardware structure is the same as that of CSPU, so the
indicator meaning of CPPU are also the same.
51 Internal Use
CPCUCPCU
A9 Signaling Processing A11
CBPU and PPU Session ID
management
Setup of signaling and traffic
connection
Packet call status maintaining
Note:
The CPCU hardware structure is the same as that of CSPU, so the
indicator meaning of CPCU are also the same.
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52 Internal Use
CBPUCBPU
Downlink data buffering, processing and transferring
Work in load sharing mode to achieve resource pool
mechanism
Re-sequencing the packet sent from PDSN(transferred via CHAC)
Note: The CBPU hardware structure is the same as that of CSPU, so the
indicator meaning of CBPU are also the same.
53 Internal Use
CHACCHAC
Transfer the traffic data (A10 interface) from PDSN to CBPU
Process the traffic data (A8 interface) from CPPU and SDB data
from CPCU, and transfer them to PDSN via the A10 interface
Transfer A11 signaling data from PDSN to CPCU directly
Provide 1000Mb Ethernet interface to PDSN
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54 Internal Use
CHAC Board AppearanceCHAC Board Appearance
RUNALM
RESET
O1GIE
TX
RX
SW1
扣
TX
RX
55 Internal Use
Downlink Data Flow in CRPSDownlink Data Flow in CRPS
CHAC CBPU CPPU CMUX
To PDSN To CIPS
ATM Bus
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56 Internal Use
Uplink Data Flow in CRPSUplink Data Flow in CRPS
CHAC CBPU CPPU CMUX
To PDSN To CIPS
ATM Bus
Bypass the CBPU
57 Internal Use
Signaling Flow in CRPSSignaling Flow in CRPS
CHAC CPCU CRMU CMUX
To PDSN To CIPS
ATM Bus
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58 Internal Use
CPMSCPMS
Connection management, mobility management, charging, shortdata burst & MD5 encryption
Convert A8 interface data to A10 and vice versa
Provides GRE and IP route displacement and forwarding function
CDMA Packet Module Subrack provides PCF functions, it accomplishes the:
Note: If data throughput is less than 40Mb then only CRPS is enough. For more
throughput we need to configure CPMS.
59 Internal Use
Boards Position in CPMSBoards Position in CPMS
1514131211109876543210
C
PC
U
C
PPU
C
MU
X
C
MU
X
C
BPU
C
HA
C
C
HAC
C
BPU
C
BPU
C
BPU
C
BPU
C
PPU
C
PPU
C
PPU
C
PPU
C
PCU
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60 Internal Use
Chapter 1 Overview
Chapter 2 CSWS
Chapter 3 CIPS
Chapter 4 CRPS
ChapterChapter 55 ClockClock SystemSystem
Chapter 6 Windup
61 Internal Use
Types of SynchronizationTypes of Synchronization
Transmission Synchronization Synchronize the transmission between BSC and MSC
Time Synchronization Synchronize the radio frame number (FN) between BSC and
BTS
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62 Internal Use
CLKMCLKM
CLKM (CLocK processing Module ) is composed of two parts: GCKP (GPS/GLONASS & ClocK Processing Board ) GCKB (Backplane of CLKM )
R U N
A L M
ACTCOM IN0 IN1 OUT ANT
CLK_B COM_B ETH_B CLK_A COM_A ETH_A
Panel of GCKB
Panel of GCKP (Active/Standby)
R U N
A L M
ACTCOM IN0 IN1 OUT ANT
63 Internal Use
BSC Clock System StructureBSC Clock System Structure
CLKC
C
N
E
T
C
M
P
U
CSWS
C
L
P
CC
B
P
U
C
M
U
X
C
P
P
U
C
P
C
U
C
B
I
E
C
M
U
X
C
B
P
U
C
R
M
U
C
P
P
U
BITS clock source
2MHz circuit clock extracted from A-Interface
CPMS
CRPS
RFN cell
8k ¡¢32M
8k ¡¢32M
A1/A2
Abis
PDSN
A10/A11
GCKP GCKP
C
S
P
U
C
M
U
X
C
F
M
R
C
B
I
E
CIPS
RFN pulse
8k ¡¢32M
RFN cell
8k
PP16Sabsolute time infomation
C
E
V
C
C
L
A
P
C
A
I
E
BTS
C
H
A
C
C
P
C
U
C
H
A
C
PDSN
A10/A11
MSC
CLKM
A3/A7BSC
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64 Internal Use
Physical ConnectionPhysical Connection
RUNALMACT COM IN0 IN1 TEST ANT
TX
RX
ETH
1PPS
COM1
COM2
RUN
ALM
ACT
RESET
7#CMUX(CRPS/CRMS)
CLK1
CLK2
E1/T1
E1/T1
E1/T1
E1/T1
RUN
ALM
ACT
CAIE
GCKP1
ETH_BCOM_BCLK_B ETH_ACOM_ACLK_A
GCKB
TX
RX
ETH
1PPS
COM1
COM2
RUN
ALM
ACT
RESET
8#CMUX(CRPS/CRMS)
RUNALMACT COM IN0IN1 TEST ANT
GCKP2
CLK1
CLK2
E1/T1
E1/T1
E1/T1
E1/T1
RUN
ALM
ACT
CAIE
ToGPS/Glonassantenna
65 Internal Use
Chapter 1 Overview
Chapter 2 CSWS
Chapter 3 CIPS
Chapter 4 CRPS
Chapter 5 Clock System
ChapterChapter 66 WindupWindup
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66 Internal Use
Software Loading FlowSoftware Loading Flow
BAM
CMUXin CRPS
Other boardsin CRPS
CMUXin CIPS
Other boardsIn CIPS
……
GCKBIn
CLKM
CSWS
67 Internal Use
Voice Signaling FlowVoice Signaling Flow
C
L
P
C
C
N
E
T
C
X
I
E
C
F
M
R
C
M
U
X
C
S
P
U
C
L
A
P
C
A
I
E
C
B
T
S
C
M
S
C
CSWS
CIPS
TDM switching
AAL2 switching
AAL2 termination
TDM bearing
AAL2 bearing
AAL5 bearing
In-bandsignaling SS7
signaling
Abis
A1
In-bandsignaling
MS
Um
Out-bandsignaling
C
R
M
U
C
M
U
X
CRPS
C
X
I
E
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68 Internal Use
Voice Traffic FlowVoice Traffic Flow
C
X
I
E
C
F
M
R
C
M
U
X
C
E
V
C
C
E
V
C
C
A
I
E
C
B
T
S
C
M
S
C
CIPS
TDM switching
AAL2 switching
AAL2 termination
TDM bearing
AAL2 bearing
Abis
A2
MS
Um
69 Internal Use
Packet Data Signaling FlowPacket Data Signaling Flow
C
L
P
C
C
X
I
E
C
F
M
R
C
M
U
X
C
S
P
U
C
L
A
P
C
A
I
E
C
B
T
S
CSWS
CIPS
AAL2 switching
AAL2 termination
AAL2 bearing
AAL5 bearing
In-bandsignaling
Out-bandsignaling
C
N
E
T
Ethernet bearing
AbisMS
Um
SS7signaling
C
M
S
CA1
C
X
I
E
C
R
M
U
C
H
A
C
P
D
S
N
CRPS
C
P
C
U
A11
C
M
U
X
TDM switching
TDM bearing
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70 Internal Use
Packet Data Traffic FlowPacket Data Traffic Flow
C
L
P
C
C
X
I
E
C
F
M
R
C
M
U
X
C
E
V
C
C
E
V
C
C
A
I
E
C
BT
S
CSWS
CIPS
AAL2 switching
AAL2 termination
Ethernet bearing
AAL2 bearing
C
N
E
T
AAL5 bearing
AbisMS
Um
C
P
P
U
C
B
P
U
CRPS/CPMS
C
H
A
C
C
P
C
U
P
D
S
N
A10
C
M
U
X
71 Internal Use
Questions?Questions?
Q. State the traffic flow in BSC system?
Q. State the signaling flow in BSC system?
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