Characteristics of Circuits on Carrier Systems - General Characteristics of International Telephone Connections and Circuits (Study Groups XII and XV) 1 pp
国外标准现行
标准号:ITU-T G.125-1989
标准名称: 载波系统上的电路的特征 国际电话连接和电路的一般特性(研究12和15组)1pp
英文名称:Characteristics of Circuits on Carrier Systems - General Characteristics of International Telephone Connections and Circuits (Study Groups XII and XV) 1 pp