Home / Standards / GB/T 7611-2001 GB/T 7611-2001 Abolished Characteristics of the electrical interfaceat hierarchical bit rate for digital network 数字网系列比特率电接口特性 Standard Type GBT ICS 33.040.50 CCS M19 Status 废止 Issue Date 2001-12-20 Implementation 2002-12-01 Responsible Dept 工业和信息化部（通信） Drafting Unit N/A