Interregister Signalling - Requirements Relating to Transmission Conditions - Specifications of Signalling Systems R1 and R2 (Study Group XI) 1 pp
国外标准现行
标准号:ITU-T Q.452-1989
标准名称: 互相对准信号传输条件相关要求
英文名称:Interregister Signalling - Requirements Relating to Transmission Conditions - Specifications of Signalling Systems R1 and R2 (Study Group XI) 1 pp