{HEAD ~ The invention} permits {TAIL ~ a calling party} on a DID line to 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 
permits
{ HEAD ~ The invention } permits { TAIL ~ a calling party } on a DID line to 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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