Home / Standards / GB/T 7610-1987 GB/T 7610-1987 Abolished Characteristics of pulse code modulation for voice-frequencies 音频脉冲编码调制特性 Standard Type GBT ICS 33.160 CCS M19 Status 废止 Issue Date 1987-04-02 Implementation 1987-12-01 Responsible Dept 工业和信息化部(通信) Drafting Unit N/A