[local]
exten => _NXXXXXX,1,Dial(Zap/g1/1212${EXTEN})

[ld]
exten => _NXXNXXXXXX,1,Dial(Zap/g1/${EXTEN})

[stations]
exten => 100,1,Dial(SIP/100)

[users]
include = stations
include = ld
include = local