[from-cnet]
exten => _X.,1,NoOp(Incomming call from C*NET: ${CALLERID(all)})
exten => _X.,n,GoTo(from-internal,${EXTEN:-3},1)
exten => _X.,1,NoOp(Incomming call from C*NET: ${CALLERID(all)})
exten => _X.,n,GotoIf($[$["${EXTEN:-3}">"101"]&$["${EXTEN:-3}"<"115"]]?dialext:dialint)
exten => _X.,n(dialext),Dial(DAHDI/1/${EXTEN:-3})
exten => _X.,n(dialext),Busy
exten => _X.,n(dialint),GoTo(from-internal,${EXTEN:-3},1)
exten => _X.,n(dialint),Busy