[gatewy]
exten => _603889XXXX,1,Dial(Zap/g4/${EXTEN},90)
exten => _603529XXXX,1,Dial(Zap/g4/${EXTEN},90)
;g3
exten => _603NXXXXXX,1,Dial(Zap/g3/${EXTEN},90)
;g4
exten => _1NXXNXXXXXX,1,Dial(Zap/g4/${EXTEN},90)
exten => _NXXNXXXXXX,1,Dial(Zap/g4/1${EXTEN},90)

; prevent students from making long distance calls
exten => _011.,1,GotoIf($["${CALLERIDNAME}" = "STUDENT"]?3:2)
exten => _011.,2,Dial(Zap/g4/${EXTEN},90)
exten => _011.,3,Playback(invalid)
exten => _011.,4,Hangup

;g3
exten => 900,1,Dial(Zap/g3/${EXTEN},90)

;; VoIP
;exten => _1NXXNXXXXXX,1,Dial(SIP/${EXTEN}@broadvox,90,t)
;exten => _NXXNXXXXXX,1,Dial(SIP/${EXTEN}@broadvox/1${EXTEN},90,t)
;exten => _011.,1,Dial(SIP/${EXTEN}@broadvox/${EXTEN},90,t)

exten => _NXXXXXX,1,Dial(Zap/g3/${EXTEN},90)
exten => _9NXXX,1,Goto(gateway,56${EXTEN},1)