Home / Standards / GB/T 14381-1993 GB/T 14381-1993 Active Generic specification for stored program control digital private automatic branch telephone exchange system 程控数字用户自动电话交换机通用技术条件 Standard Type GBT ICS 33.040.60 CCS M40 Status 现行 Issue Date 1993-05-14 Implementation 1994-01-01 Responsible Dept 工业和信息化部（电子） Drafting Unit N/A