[inbound]
exten => _NXXNXXXXXX,1,Answer()
exten => _NXXNXXXXXX,2,Set(NUM=${EXTEN})
exten => _NXXNXXXXXX,3,Goto(campaigns,s,1)

[campaigns]
;exten => s,1,Background(/array/${NUM}/welcome)
exten => s,1,Background(welcome)
exten => s,2,Background(please-enter-the) 
exten => s,2,Background(number) 

exten => _XXX,1,Playback(/array/${NUM}/${EXTEN})
exten => _XXX,2,GotoIF($[${PLAYBACKSTATUS}= FAILED]?:nocode,1)
exten => _XXX,3,Wait(1)
exten => _XXX,4,Playback(goodbye)
exten => _XXX,5,Hangup()
exten => *,1,Goto(recording,s,1)

exten => nocode,1,Playback(invalid)
exten => nocode,2,GoTo(s,2)

[recording]
exten => s,1,Background(Enter_code_to_record)
exten => _XX,1,Record(/array/${NUM}/tmp/${EXTEN})
exten => _XX,2,Wait(1)
exten => _XX,3,Playback(/array/${NUM}/tmp/${EXTEN})
exten => _XX,4,Playback(to_confirm_press_pound_or_star_to_record_again)
exten => #,1,System("mv /array/${NUM}/tmp/${EXTEN}.wav /array/${NUM}/${EXTEN}.wav")
exten => #,2,Hangup()
exten => *,1,Goto(s,1)
exten => t,1,hangup()