Home / Standards / GB/T 7394-1987 GB/T 7394-1987 Abolished Requirements of 600～9600 bit/s baseband modem 600～9600 bit/s基带调制解调器技术要求 Standard Type GBT ICS 33.160 CCS M32 Status 废止 Issue Date 1987-03-12 Implementation 1987-11-01 Responsible Dept 工业和信息化部（电子） Drafting Unit N/A