The invention permits a calling party on {HEAD ~ a DID line} to {TAIL ~ a desired extension} connected to a PBX to be automatically connected to the called partys mailbox in a VMS when the called extension is busy or does not answer 
to
The invention permits a calling party on { HEAD ~ a DID line } to { TAIL ~ a desired extension } connected to a PBX to be automatically connected to the called partys mailbox in a VMS when the called extension is busy or does not answer
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