[from-pstn]
exten => s,1,Dial(${ARG2},20)                                   ; Ring the interface, 20 seconds maximum
exten => s,2,Goto(s-${DIALSTATUS},1)                            ; Jump based on status (NOANSWER,BUSY,CHANUNAVAIL,CONGESTION,ANSWER)
exten => s-NOANSWER,1,Voicemail(u${ARG1})               ; If unavailable, send to voicemail w/ unavail announce
exten => s-NOANSWER,2,Goto(default,s,1)                 ; If they press #, return to start
exten => s-BUSY,1,Voicemail(b${ARG1})                   ; If busy, send to voicemail w/ busy announce
exten => s-BUSY,2,Goto(default,s,1)                             ; If they press #, return to start
exten => _s-.,1,Goto(s-NOANSWER,1)                              ; Treat anything else as no answer
exten => a,1,VoicemailMain(${ARG1})                             ; If they press *, send the user into VoicemailMain