[fax]
exten => _NXXXXXX,1,Dial(Zap/g1/${EXTEN}|45);
exten => _9NXXXXXX,1,Dial(Zap/g1/${EXTEN:1}|45);
exten => _91NXXNXXXXXX,1,Dial(Zap/g1/${EXTEN:1}|45);
exten => _1NXXNXXXXXX,1,Dial(Zap/g1/${EXTEN}|45);
exten => _701X,1,Dial(Zap/g2/${EXTEN});