ATIS 0100302A:1992 (R2011)
ATIS 0100302A:1992 (R2011) Supplement To Atis 0100302 - Digital Processing Of Voice-band Signals-line Format For 32 Kbit/s Adaptive Differential Pulse-code Modulation (adpcm) (channel-control Templates And Robbed-bit Signaling Alarm Transmission)