basic knowledge of Telecom Network & SPC

Basic knowledge of telecom network

1. Telecom Network and SPC
Switch

2. PSTN
CATV
DDN
PSPDN
FR
ATM
INTERNET
PLMN
Telecommunication Network

3. Telephony Network
Hierarchical Structure
. .
C1 Large Area Center
C2 Prince Center
C3 City Center
C4 County Center
C5 Local Center
Tm
Int’l Gateway
Phone Set

4. Telecom Network Multi-layer Model
OMC
MMC OMC
OMC
Telecom Databa
xe
TMN
IN
Clock Sych.
Signaling
Network
Switch
Network
Trans.
Network
Assistant
Network
Foundation
Network
Trans.Point
LE Point
Tandem Exchage.
Assistant
Network
Transmission
Links
Traffic Route
Assistant
Network Links

5. No.7 Signaling Network in China
HSTP
LSTP
SP
—China Telecom; China Mobile; China Unicom

6. Reference
clock
2 level
Clock
2 level
Clock
Level
3
Level
3
Level
3
Level
3
Level
4
Master-slave sych.
……
…… ……
……
……
…………
Clock Sych. Network
Level
4
Level
4
Level
4
Level
4
Level
4
Level
4
Level
4

7. Service Service
SwitchSwitch
PSTN/
ISDN
GSM
CDMA
CCS7 Networking
SMP/SMAP
SCP
SCE
SSPSSP
SSPSSP SSPSSP
Data LinkData Link
Service Service
ControlControl
Service Service
ManagementManagement
SCP
Signaling Signaling
SystemSystem
IP
Centralized IN

8. Internet
PSTN
Network Manage
Center
Other network
(DDN,FR,ATM,etc.)
PSTN
E1
LAN n
10/100M
E1
ZXB10-S20
LAN1
V.35
Intelligent Community/SOHO
Business customer/SOHO
PBX
LAN1
CES
10/100M
Office Building/Large Group
Dialup/ IP phone Individual
Total solution of Datacom network
ZXA10-
ADSL8210
ADSL UserLAN User
ZXE10-ES
SERIES
ZXB10-S30
ZXB10-S100
ZXB10-S300
ZXB10-M1000
Access layer
ZXR10-T16
ZXIP10-AS
10/100M
ZXE10-UAS10000
ZXB10-AX
Converging layer
ZXR10-T64/T32
Core layer
ZXB10-BX ZXR10-T128

9. BTS
BTS
(2G)
BSC
(2G)
BTS
BTS
(3G)
BSC
(3G)
MSC
MS
Um IS-95A
Abis
MSC
HLR VLR
EIR
AUC
OMC
MC
SME
PSTN
ISDN
PSPDN
VLR
C
F
E
SME
MC
H
D
G
Pi
Di
Ai
M
M
M
N
B
TCP/IP
TCP/IP
A(IOS4.X)
IS-41
MS
MS
MS
CDMA IS95 System Network
Um IS-2000

10. No.7信令网
ZXC10-
SCEP
ZXC10-
GMSC/SSP
ZXC10-MSC/
VLR/SSP
PSTN
MAP
PLMN
TUP/
ISUP

TUP/

ISUP
数据通路
ZXC10-IN WIN Integrated Solution
ZXC10-SCP ZXC10-VCZXC10-SCP
ZXC10-SMP
ZXC10-
SMAP
ZXC10-IP
ZXC10-
HLR

11. Mobile Network

12. Developing Trend of Telecom
Network
PSTN
INTERNET
CATV
DDN
PSPDN
FR
ATM
PLMN
United Multi-service Network

13. Voice Signaling Digitalization
SampleQuantifying
Filter
Code
Fs = 8KHzA/ Law
Non-line
Speed 64kb/s
Analog
Voice
Digitalized Voice

14. Main Structure of SPC Switch
Switch Matrix
CPU
Memory
Interface Interface
User Trunk
Trunk User
I/O Device
Control Part

15. SPC Switch Composing
Speech Path
System
Control
System • Call Processing
• PP (Peripheral Processor)
• Subscriber Interface Circuit;
• Trunk Interface Circuit;
• Switch Net
• Signaling Parties
O&M System

16. Subscriber Interface
•Analog
Subscriber
•Digital
Subscriber；
• 2B+D
• 30B+D
BORSCHT Functions
• B: Battery feeding;
• O: Over voltage protection;
• R: Ringing;
• S: Supervision;
• C: CODEC;
• H: Hybrid;
• T: Test;

17. Trunk Interface
•Analog Trunk；
•Digital Trunk；
•Digital Optical
Trunk
GAZPACHO Function
• G: Generation of frame code;
• A: Alignment of frame;
• Z: Zero string suppression;
• P: Polarity conversion;
• A: Alarm (TS0);
• C: Clock recovery;
• H: Hunt during reframe;
• O: Office signaling;
Similar to Analog Subscriber
Interface OSCHT

18. Digital Switch Net
Connector Types
•T Connector
•S Connector

19. SM
CM
Input
HW
Output
HW
Working Principle of
T-Type Connector
•Write by Turn
• Read by Selecting
•Write by Selecting
• Read by turn
TS5
TS25
Digital Switch Net-1

20. •Input Conf.

•Output Conf.
Working principle of
S-Type Connector
CM
TS5
TS5
00
1 1
05
10
CM
1
TS5
TS5
5
0
1
0
1
10
Digital Switch Net-2

21. •TST
•TTT
Typical Large
Switch Net
T T
S
Digital Switch Net-3

22. Interfaces
Unit
204M
Optical
fiber
204M
Optical
Fiber
8Kx8K
Switch module
Peripheral Modules
HW
HW
HW
64Kx64K
Single-T Switch
8Kx8K
Switch module
…
…
Central Switch Module
Patent Central Switch Network
Technology In ZXJ10

23. 4Kx4K
Switch
Unit
4Kx4K
Switch
Unit
4Kx4K
Switch
Unit
8Kx8K
Switch
Unit
8Kx8K
Switch
Unit
8Kx8K
Switch
Unit
4Kx4K
Switch
Unit
4Kx4K
Switch
Unit
4Kx4K
Switch
Unit
Interface
module
Interface
module
Fiber
Fiber Fiber
Fiber
.
.
.
.
.
.
.
.
.
.
4Kx4K
Switch module
4Kx4K
Switch module
Central network
Peripheral Modules
.
.
.
.
.
.
.
.
.
.
0#
1#
31#
0#
1#
15#
0#
1#
31#
Fiber
Fiber
Fiber
Fiber
Fiber
Fiber
.
.
.
.
.
HW HW
Common Other Central Network
Technology

24. Controlling Method of SPC
Exchange
•Centralized Control；
•Distributed Control；
•Hierarchical Distributed Control.

25. ZXJ10 Control System
Inter-module Fully Distributed Control
PSM PSM
RSM
RSM
SNM
OMM
MSM
IAM
Intra-module Hierarchical Distributed Control
ASLC
SYCK
M P LAN
COMM MON PEPD
SP
DT
ASIG
SP
T Net
DSLC
RS232
FBI
DSNI
CKDR
POWER

26. ZTE Plaza, Keji Road South, Hi-Tech Industrial Park, Na
nshan District, Shenzhen, P.R. China
Http: //www.zte.com.cn
Thank you!