Home / Standards / GB/T 15940-1995 GB/T 15940-1995 Abolished Basic multiplexing structure for synchronous digital hierarchy signals 同步数字体系信号的基本复用结构 Standard Type GBT ICS 33.040.40 CCS M13 Status 废止 Issue Date 1995-12-21 Implementation 1996-08-01 Responsible Dept 工业和信息化部（通信） Drafting Unit N/A