ITU-T G.724-1988 Characteristics of a 48-Channel Low Bit Rate Encoding Primary Multiplex Operating at 1544 kbit/s - General Aspects of Digital Transmission Systems; Terminal Equipments (Study Groups XV and XVIII) 6 pp
The 48-channel primary multiplexer provides conversion between 48 voice-frequency channels and one
1544 kbit/s ADPCM stream. In the 1544 kbit/s stream, the voice-frequency signals are coded according to the PCM encoding law defined in Recommendation G.71
ITU-T G.724-1988 history
1988ITU-T G.724-1988 Characteristics of a 48-Channel Low Bit Rate Encoding Primary Multiplex Operating at 1544 kbit/s - General Aspects of Digital Transmission Systems; Terminal Equipments (Study Groups XV and XVIII) 6 pp