exten => s,n,Set(SOURCEEXTEN=s)
exten => s,n,Goto(blacklist-call-context,s,1)
exten => s,n(doneblacklist),NoOp()
+exten => s,n,Goto(callback-check-call-context,s,1)
+exten => s,n(donecallback),NoOp()
exten => s,n,Goto(disa-check-call-context,s,1)
exten => s,n(donedisacheck),Dial(|LOCALUSERS|,${RINGTIME},r)
exten => s,n,Goto(context-voicemail,s,1)