IBM NETVISTA 6824 - Manuel (Page 48)

#VBQ? Query Buffer Size
#VBS Bits per sample (ADPCM or PCM)
#VBT Beep Tone Timer
#VCI? Identify Compression Method
#VLS Voice line select
#VRA Ringback goes away timer
#VRN Ringback never came timer
#VRX Voice Receive Mode
#VSDB Silence deletion tuner
#VSK Buffer skid setting
#VSP Silence detection period
#VSR Sampling rate selection
#VSS Silence deletion tuner
#VTD DTMF tone reporting capability
#VTM Enable timing mark placement
#VTS Generate tone signals
#VTX Voice transmit mode
36 User Guide