Home / Standards / GB/T 13158-1991 GB/T 13158-1991 Active Compatibility test procedures of clock and synchronization equipment of digital switch introducedinto digital network 数字交换机的时钟和同步设备进入数字网的兼容性测试方法 Standard Type GBT ICS 33.040.40 CCS M13 Status 现行 Issue Date 1991-09-16 Implementation 1992-06-01 Responsible Dept 工业和信息化部（通信） Drafting Unit N/A