[macro-internal]
exten => s,1,SetVar(CALLEDEXTEN=${EXTEN})
exten => s,2,Dial(sip/${ARG1})
exten => s,3,Background(vc/terminal-busy)
exten => s,4,Background(vc/please-hold)
exten => s,4,WaitMusicOnHold(1)
exten => s,5,Goto(sip,${CALLEDEXTEN},1)