Mine

[outgoing]

  ignorepat => 0
  exten => _X,1,Dial(Zap/g2/${EXTEN:1},120)
  exten => _X,2,Congestion()
  exten => _X,102,Congestion()

[raus]

  ;PSEUDO DIALTONE abspielen
  exten => s,1,Playtones(busy)

  exten => 0,1,Goto(outgoing,${EXTEN},1)

  exten => 1,1,Goto(isdn-unten,${EXTEN},1)

  exten => 2,1,Goto(isdn-oben,${EXTEN},1)

  exten => 5,1,Goto(analog,${EXTEN},1)

[isdn-unten]
  exten => _X,1,Dial(Zap/g3/${EXTEN})
  exten => _X,2,Congestion()
  exten => _X,102,Congestion()

[isdn-oben]
  exten => _X,1,Dial(Zap/g4/${EXTEN})
  exten => _X,2,Congestion()
  exten => _X,102,Congestion()