Integrated Services Digital Network Prof Choong Seon HONG
- Slides: 50
Integrated Services Digital Network Prof. Choong Seon HONG Kyung Hee University 1
ISDN 서비스(계속) q. ISDN 서비스 Kyung Hee University 4
16. 2 History q아날로그 네트워크를 통한 음성통신 Kyung Hee University 5
History (cont’d) q종합 디지털 망(IDN: Integrated Digital Network) Kyung Hee University 8
History (cont’d) q종합 정보 통신망 (ISDN) v. ISDN incorporates all communication connections in a home or building into a single interface Kyung Hee University 9
16. 3 ISDN 가입자 Access Channel Bearer(B) Data(D) Hybrid(H) Kyung Hee University Data Rate (Kbps) 64 16, 64 384, 1536, 1920 10
ISDN 가입자 Access (cont’d) q B(Bearer) 채널 v 64 Kbps 전송률 v기본 사용자 채널 v전이중모드 디지털 정보 전송 q D(Data) 채널 v 16 또는 64 Kbps v. B 채널을 위한 제어 신호 전달 v In-band signaling and out-of-band signaling q H(Hybrid) 채널 v고속 데이터 전송률 응용 (화상, 원격회의) v. H 0(384 Kbps), H 11(1536 Kbps), H 12(1920 Kbps) Kyung Hee University 11
ISDN 가입자 Access (cont’d) q사용자 인터페이스 v기본 접속 인터페이스(BRI: Basic Rate Interface) v 1차군 접속 인터페이스(PRI: Primary Rate Interface) Kyung Hee University 12
ISDN 가입자 Access (cont’d) q기본 접속 인터페이스 (BRI) v 2 B + D로 구성된 digital pipe Kyung Hee University 13
ISDN 가입자 Access (cont’d) q 1차군 접속 인터페이스 (PRI) v 23 B+D or 30 B + 2 D (in Europe)로 구성된 digital pipe Kyung Hee University 14
ISDN 가입자 Access (cont’d) q기능 그룹(Function Grouping) v. BRI나 PRI 서비스 접근 장치를 기능별로 분류 Kyung Hee University 15
ISDN 가입자 Access (cont’d) q참조점(Reference Point) v각 요소간의 인터페이스 구분 Kyung Hee University 18
ISDN 가입자 Access (cont’d) q참조점 (reference points) v. U : NT 1과 ISDN 중계국간 인터페이스 v. T : NT 2와 NT 1간의 인터페이스 v. S : TE 1이나 TA와 NT 1, TE 1과 NT 2간의 인터페이스 v. R : TE 2와 TA간 연결 Kyung Hee University 19
16. 4 ISDN 계층 구조 Kyung Hee University 20
ISDN 계층 구조(계속) q. B와 D채널에 대한 ISDN 계층 구조 Circuit-switched Network, Frame Relay Network and ATM Network, etc Kyung Hee University 21
ISDN 계층 구조(계속) q. BRI를 위한 물리층 규격 v. R 인터페이스 : EIA 표준(RS-232) 또는 V, X계열(X. 21) v. S 인터페이스 : ISO 8887 l Four-, six-, or eight- wire connections Kyung Hee University 23
ISDN 계층 구조(계속) q. S 인터페이스 v. ISO 8887 Kyung Hee University 24
ISDN 계층 구조(계속) q. S 인터페이스 핀 Name a b c d e f g h Kyung Hee University TE Power Source 3 Transmit Receive Transmit Power Sink 2 NT Power Sink 3 Receive Transmit Receive Power Source 2 25
ISDN 계층 구조(계속) q부호화 : U 인터페이스 Pseudo-ternary encoding : a version of bipolar AMI with the 0 and 1 levels reversed Kyung Hee University 26
ISDN 계층 구조 (계속) q. U 인터페이스(디지털가입자 or local loop) v 2 B 1 Q부호화 ( two binary and one quaternary) Kyung Hee University 27
ISDN 계층 구조(계속) q. BRI 프레임 Kyung Hee University 28
ISDN 계층 구조(계속) q. PRI를 위한 물리층 규격 Kyung Hee University 30
ISDN 계층 구조(계속) q. PRI 프레임 Kyung Hee University 31
ISDN 계층 구조(계속) q. LAPD 주소지정 SAPI : Service Access Point Identifier 000000 : call control for network layer (Signaling use of D channel) 000001 : call control for upper layer (End-to-end signaling) 010000 : Packet communication (data use of D channel) 111111 : Management Kyung Hee University 33
ISDN 계층 구조(계속) q. SAPI(Service Access Point Identifier) 필드 v 000000 : 네트워크계층을 위한 호 제어 (signaling use of D channel) v 000001 : 상위층을 위한 호제어 (user-to-user signaling) v 010000 : 패킷 통신 v 111111 : Management q. TEI 필드 : TE 주소(128개) q CR : command response (1 or 0) q 0 : meaning next byte is also address Kyung Hee University 34
ISDN 계층 구조(계속) q네트워크층 D채널을 통하여 연결이 확립된 후에 B채널을 통하여 데이터 전 달 가능 (Circuit switching, X. 25 and others) v Network layer packet format Kyung Hee University 35
ISDN 계층 구조(계속) q. Protocol Discriminator(프로토콜 식별) : Q. 931(00001000) q. Call Reference field : the sequence number of the call Kyung Hee University 36
ISDN 계층 구조(계속) q. Message Type (유형) v Call Establishment message v Call Information message v Call Clearing message v Miscellaneous Kyung Hee University 37
ISDN 계층 구조(계속) q. Call Establishment Message v. SETUP ACKNOWLEDGMENT v. CONNECT ACKNOWLEDGMENT v. PROGRESS v. ALERTING v. CALL PROCESSING Kyung Hee University 38
ISDN 계층 구조(계속) q. Call Information message v. RESUME ACKNOWLEDGMENT v. SUSPEND ACKNEWLEDGMENT v. SUSPEND REJECT v. USER INFORMATION Kyung Hee University 39
ISDN 계층 구조(계속) q. Call Clearing message v. DISCONNECT v. RELEASE COMPLETE q. Miscellaneous Kyung Hee University 40
ISDN 계층 구조(계속) q. Information Element v호 설정에 필요한 정보 l ex) sender and receiver addresses , 라우팅 정보, the type of network (such as circuit, X. 25, ATM, or frame relay) Kyung Hee University 41
ISDN 계층 구조(계속) q Information Element Type Kyung Hee University 42
ISDN 계층 구조(계속) q. ISDN 주소지정 NC : national code for identifies of the specific network Kyung Hee University 43
16. 5 BROADBAND ISDN Kyung Hee University 44
BROADBAND ISDN(계속) q. B-ISDN Service Kyung Hee University 45
BROADBAND ISDN(계속) q대화형(Interactive) 서비스 v. Conversational v. Messaging v. Retrieval q분배형(Distributive) 서비스 v. Without User Control v. With User Control Kyung Hee University 46
BROADBAND ISDN(계속) q물리 규격 Kyung Hee University 47
BROADBAND ISDN(계속) q. Access Method v 155. 520 Mbps Full-duplex v 155. 520 Mbps output/622. 080 Mbps input v 622. 080 Mbps Full-duplex Kyung Hee University 48
BROADBAND ISDN(계속) q기능 그룹 (Functional Grouping) v. B-NT 1 v. B-NT 2 v. B-TE 1 v. B-TE 2 v. B-TA Kyung Hee University 49
BROADBAND ISDN(계속) q참조점(Reference Point) ~ the same as N-ISDN Kyung Hee University 50
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