Line Signalling, Digital Version - Conversion between Analogue and Digital Versions of System R2 Line Signalling - Specifications of Signalling Systems R1 and R2 (Study Group XI) 21 pp
国外标准现行
标准号:ITU-T Q.430-1988
标准名称: 线路信号,数据翻译-模拟和数据翻译系统的转换
英文名称:Line Signalling, Digital Version - Conversion between Analogue and Digital Versions of System R2 Line Signalling - Specifications of Signalling Systems R1 and R2 (Study Group XI) 21 pp