[macro-dial]
exten => s,1,Noop(${ARG1})
exten => s,2,Dial(${ARG1},${DIALTIME})
exten => s,3,Goto(s-${DIALSTATUS},1)
exten => s-NOANSWER,1,Hangup
exten => s-BUSY,1,Busy
exten => _s-.,1,Set(PRI_CAUSE=1)
exten => _s-.,2,Hangup