ITU G Series   G 시리즈, G 시리이즈, G 계열

1. ITU의 G 계열 권고 표준

  ㅇ 디지털 전송망에 관한 것들에 대하여 권고하고 있음
     - (Transmission Systems and Media, Digital Systems and Networks)
        . 例) PDH, SDH, 다중화계위구조, 망동기방식 등


2. ITU-T G 계열 권고 체계

  ㅇ International Telephone Connections and Circuits : G.100–G.199
  ㅇ Individual Characteristics of International Carrier Telephone Systems on
     Metallic Lines      : G.300–G.399
  ㅇ General Characteristics of International Carrier Telephone Systems on Radio-
     Relay or Satellite Links and Interconnection with Metallic Lines : G.400–G.449
  ㅇ Coordination of Radiotelephony and Line Telephony : G.450–G.499
  ㅇ Terminal Equipments : G.700–G.799
  ㅇ General             : G.700–G.709
  ㅇ Coding of analogue signals by Pulse Code Modulation  : G.710–G.719
  ㅇ Coding of analogue signals by methods other than PCM : G.720–G.729
  ㅇ Principal characteristics of primary multiplex equipment : G.730–G.739
  ㅇ Principal characteristics of second order multiplex equipment : G.740–G.749
  ㅇ Principal characteristics of higher order multiplex equipment : G.750–G.759
  ㅇ Principal characteristics of transcoder and digital multiplication equipment :
                                                                     G.760–G.769
  ㅇ Operations, administration and maintenance features of transmission equipment :
                                                                     G.770–G.779
  ㅇ Principal characteristics of multiplexing equipment for the synchronous
                                                 digital hierarchy : G.780–G.789
  ㅇ Other terminal equipment : G.790–G.799
  ㅇ Digital Networks         : G.800–G.899
  ㅇ Digital Sections and Digital Line System : G.900–G.999


3. ITU의 G 계열 주요 권고 표준

  ㅇ G.702 :  PDH 관련 다양한 비트율(전송속도)에 대한 규정
     - `Digital hierarchy bit rates`
  ㅇ G.703 :  계층적 디지털 인터페이스의 물리적,전기적 특성
     - `Physical/electrical characteristics of hierarchical digital interfaces`
  ㅇ G.704 :  
     - `Synchronous frame structures used at 1544, 6312, 2048, 8448, 44736 kbit/s
        hierarchical levels`
  ㅇ G.708 :  SDH의 NNI
     - `Network node interface for the synchronous digital hierarch`
  ㅇ G.709 :  광 수송 네트워크 인터페이스  (舊: 동기식 다중화 구조)
     - `Interfaces for the optical transport network(OTN)`

  ㅇ G.801 : 디지털 전송 모델 (1990)
     - `Digital transmission models`
  ㅇ G.803 : 동기식 디지털 계위를 기반으로 한 전달망 구조
     - `Architecture of transport networks based on the SDH`
  ㅇ G.822 : 국제디지털회선에서 제어슬립률 목표
     - `Controlled slip rate objectives on an international digital connection`

  ㅇ G.957 : 동기식 디지털 계위와 관련있는 장비 및 시스템의 광 인터페이스
     - `Optical interfaces for equipments and systems relating to SDH`