The VoiceAnswer entries give a sequence of commands Unimodem/V can send to your modem to answer a voice call and monitor for other calling tones. For example, SMPVOICE.INF uses seven VoiceAnswer entries to specify a sequence of commands that answer a voice call.
HKR, VoiceAnswer, 1,, "at#cls=8cr" (select voice)
HKR, VoiceAnswer, 2,, "at#vls=8cr" (route phone line i/f thru modem)
HKR, VoiceAnswer, 3,, "at#vbt=1cr" (beep tone timer)
HKR, VoiceAnswer, 6,, "ats30=60cr" (sampling rate selection)
HKR, VoiceAnswer, 7,, "atacr" (answer)