[gdincoming]
exten => s,1,Answer()
exten => s,2,Set(CALLERID(num)=${PHONENUM})
exten => s,3,GoToIf($["${ISTRANSFER}" = "TRANSFER"]?5:4)
exten => s,4,GoToIf($["${DSPMODE}" = "none"]?5:6)
exten => s,5,GoTo(talk,1)
exten => s,6,GoTo(dsp,1)

exten => dsp,1,GoToIf($["${DSPMODE}" = "backgrounddetect"]?13:2)
exten => dsp,2,GoToIf($["${DSPMODE}" = "amd"]?11:3)
exten => dsp,3,GoToIf($["${DSPMODE}" = "nvfaxdetect"]?9:4)
exten => dsp,4,GoToIf($["${DSPMODE}" = "waitforsilence"]?7:5)
exten => dsp,5,GoToIf($["${DSPMODE}" = "custom"]?10:6)
exten => dsp,6,GoTo(custom,1)
exten => dsp,7,WaitForSilence(500|2)
exten => dsp,8,GoTo(dsp,15)
exten => dsp,9,NVFaxDetect(2||700)
exten => dsp,10,Goto(dsp,17)
exten => dsp,11,AMD()
exten => dsp,12,GoToIf($["${AMDSTATUS}" = "HUMAN"]?15:16)
exten => dsp,13,BackgroundDetect(silence/3|500|300|1050)
exten => dsp,14,GoTo(dsp,17)
exten => dsp,15,GoTo(talk,1)
exten => dsp,16,GoTo(msg,1)
exten => dsp,17,Hangup

;exten => msg,1,hangup
exten => msg,1,GoToIf($["${AMDSTATUS}" = "MACHINE"]?2:3)
exten => msg,2,Playback(confirm-removal)
exten => msg,3,hangup