[from-pri-pstn]
; Calls from BT arrive here for processing
; match  anything that arrives from BT, and send it out on port 2

exten => _2176[6-8]X,1,Dial(ZAP/g2/${EXTEN})
exten => _2176[6-8]X,2,Congestion
exten => _2176[6-8]X,102,Busy

exten => _21769[012345789],1,Dial(ZAP/g2/${EXTEN})
exten => _21769[012345789],2,Congestion
exten => _21769[012345789],102,Busy

exten => 217696,1,Answer()
exten => 217696,n,SayUnixTime(,GMT, R)
exten => 217696,n,hangup