1. 교환기 변천사

2. 목 차
1. 교환기 개요
2. 기술적인 추세
3. 교환기 변천사
4. 시스템 기능
5. 기능 설명

3. 1. 교환기 개요 1.1. 개념 PSTN - Network Side : 효율적인 Network 관리
Building
사설교환기
C.O
PSTN
Concentration
- Network Side : 효율적인 Network 관리
- User Side : 경제적 (Installation, Operation)
다양한 서비스
유지보수의 용이
** PSTN : Public Service Telephone Network
** C.O : Central Office

4. 1. 교환기 개요 1.2. 시스템 Block Diagram PSTN Trunk Line Interface Switch
Subscriber
Line
Interface
PSTN
Control
Part
Signaling
Part
I/O
Interface
Administrator

5. 2. 기술적인 추세 2.1. 서비스 추세 Visualized Voice Connection Integrated
Personalized
Intelligent

6. 2. 기술적인 추세 2.2. 기능 추세 Switching Solution/ Internet 교환기 Wireless
MIP : Mobile IP
Optic Switching
Broadband Switching
Internet Service
IP Telephony
MIP Telephony
CTI Service
Narrow band Switching
Solution/
Internet
CT-2
DECT
CDMA 2G/3G
WLAN
교환기
현 상황
Wireless
** CTI : Computer Telephony Integration
** CT-2 : Cordless Telephony generation 2
** DECT : Digital European Cordless Telecomm.
** CDMA : Code Division Multiple Access

7. 2. 기술적인 추세 Digital Analog 용량 연도 2.3. 시스템 추세 Voice Data Integrated
WDM
Exchange 용량
ATM
Exchange
Digital
ISDN
Exchange IP
Exchange
Digital
Exchange
Voice
Data
Integrated
Optic
Electronic
Exchange
Automatic
Exchange
Analog
Manual
Exchange 연도
** ISDN : Integrated Service Digital Network
** ATM : Asynchronous Transfer Mode
** WDM : Wavelength Division Multiplex

8. 3. 교환기 변천사
3.1. 기본 구성
교환기
C.O
일반전화기
PSTN
전용선
타 PABX
시스템 운영자
프린터

9. 3. 교환기 변천사 3.2. 기능추가 - Digital 기기 교환기 PSTN 일반전화기 Printer Administrator
2B+D
Digital Trunk (T1,E1)
PSTN
C.O
일반전화기
전용선
Other PABX
Administrator
Printer

10. 3. 교환기 변천사 3.3. 기능추가 - ISDN 교환기 PSTN 일반전화기 Printer Administrator
ISDN PC
교환기
ISDN Phone
ISDN Trunk (PRI,BRI)
2B+D
Digital Phone
2B+D
Digital Trunk (T1,E1)
PSTN
C.O
일반전화기
전용선
Other PABX
Administrator
Printer

11. 3. 교환기 변천사 3.4. 기능추가 - CTI 교환기 PSTN 일반전화기 Agents / Tele-marketer
ISDN PC
교환기
ISDN Phone
ISDN Trunk (PRI,BRI)
2B+D
Digital Phone
Digital Trunk (T1,E1)
2B+D
PSTN
C.O
일반전화기
전용선
CTI
Server
PBX
Driver
Other PABX
LAN DB
Manager
Administrator
Printer
Agents /
Tele-marketer

12. 3. 교환기 변천사 3.5. 기능추가 - Wireless 교환기 PSTN 일반전화기 Agents / Tele-marketer
ISDN PC
교환기
ISDN Phone
ISDN Trunk (PRI,BRI)
2B+D
Digital Phone
Digital Trunk (T1,E1)
2B+D
PSTN
C.O
일반전화기
전용선
Base Station
CTI
Server
PBX
Driver
Other PABX
Hand Held
Phone
LAN DB
Manager
Administrator
Printer
Agents /
Tele-marketer

13. 3. 교환기 변천사 3.6. 기능추가 - Internet 교환기 PSTN Internet 일반전화기 IP 전화기
ISDN PC
교환기
ISDN Phone
ISDN Trunk (PRI,BRI)
2B+D
Digital Phone
PSTN
Digital Trunk (T1,E1)
2B+D
C.O
일반전화기
VOIP
전용선
Call
Manager
Base Station
Other PABX
IP 전화기
CTI
Server
Cordless
Phone
Internet
LAN Switch DB
Manager
Printer
Agents /
Tele-marketer
Administrator
Multimedia PC
** VOIP : Voice Over Internet Protocol

14. 3. 교환기 변천사 3.7. 기능추가 - ATM Backbone 교환기 PSTN ATM network Internet
ISDN PC
교환기
ISDN Trunk (PRI,BRI)
ISDN Phone
PSTN
Digital Trunk (T1,E1)
2B+D
Digital Phone
C.O / Leased Line
2B+D
일반전화기
STM1 (155M)
Cell Switch
ATM network
VOIP
Base Station
Call
Manager
IP 전화기
CTI
Server
Cordless
Phone
Internet
LAN Switch DB
Manager
Printer
Agents /
Tele-marketer
Administrator
Multimedia PC
** STM1 : Synchronous Transfer Mode type 1

15. 4. System 기능 4.1. 시스템 기능 On-line Diagnostics (Fault Detect / Recovery)
과금 / 통계
원격 유지보수 (Remote Polling/ Remote Alarm)
4.2. Networking 기능
Analog / Digital / ISDN / SS7 / Wireless / Internet
4.3. 부가기능
Voice Mail System
Computer and Telephony Integration
Internet Telephony Gateway (VoIP)
Wireless CDMA
** SS7 : Signaling System No.7

16. 5. 기능 설명 5.1. ISDN (Integrated Service Digital Network)
5.2. Wireless CDMA
5.3. Internet Telephony
5.4. CTI (Computer Telephony Integration)

17. 5.1. ISDN PSTN / ISDN 교환기 NT1 ISDN Phone BRI 2B+D PRI 30B+D ISDN PC
ISDN G4 Fax
BRI
2B+D
ISDN Phone
** PRI : Primary Rate Interface (30B+D)
** BRI : Basic Rate Interface (2B+D)
** B : Bearer channel (64Kbps)
** D : Data channel (64 or 16Kbps)
** NT1 : Network Termination Type 1
ISDN Picture Phone

18. 5.2. Wireless CDMA PLMN Hand Off PSTN/ISDN InfoMobile Public Zone MSC
BTS
PLMN
HLR/VLR
Public Zone
IS-634
BSC
MSC
Hand Off
PSTN/ISDN
Office Zone
InfoMobile
BTS
InfoMobile : 삼성 Inforex Mobile 시스템
PLMN : Public Location Mobile Network
HLR/VLR : Home/Visitor Location Registeration
MSC : Mobile Subscriber Controller
BSC : Base Station Controller
BTS : Base Station Transceiver System

19. 5.3. Internet Telephony PSTN 교환기 교환기 IP Network (Internet) Gatekeeper
Internet Phone
Web Video Phone
IP Network
(Internet)
Multimedia PC
교환기
교환기
VOIP
VOIP
Telephone
Telephone
PSTN
Telephone
Telephone

20. 5.4. Computer and Telephony Integration
Internet
PSTN
Gateway
Server
WEB
Server
교환기
L A N DB
Manager
ACD
ARS
PBX Driver
CTI Server
VMS
FMS
Clients type A
Clients type B
** ACD : Automatic Call Distribution ** VMS : Voice Mail System
** ARS : Automatic Response System ** FMS : Fax Mail System

21. 감사합니다