The encoding law used is the A-law as specified in Recommendation G.711. The sampling rate, load capacity and the code are also specified in that Recommendation.The number of quantized values is 256. Note-The inversion of bits 2, 4, 6, and 8 is covered by the encoding law and is applicable only to voicechannel time slots.
ITU-T G.732 FRENCH-1993 history
1993ITU-T G.732 FRENCH-1993 CHARACTERISTICS OF PRIMARY PCM MULTIPLEX EQUIPMENT OPERATING AT 2048 kbit/s