[macro-xten]
exten => s,1,Dial(sip/${ARG})
exten => s,2,Voicemail(u${EXTEN})
exten => s,3,Playback(vm-goodbye)
exten => s,4,Hangup

exten => i,1,Answer
exten => i,n,Playback(the-number-u-dialed,noanswer)
exten => i,n,SayDigits(${ARG})
exten => i,n,Playback(not-yet-assigned,noanswer)
exten => i,n,Busy
exten => i,n,Hangup

[all-exten]
exten => _X,1,Macro(xten,${EXTEN})