作者: Byron Williams , Ralph Straubs , William Roome , Kristin Kocan , Richard Emery
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摘要: The present invention provides a method for providing simultaneous ring and check presence prior to terminating service plurality of called phones in set. set includes wireline or wireless units. A broker intercepts call invitation message generated by calling phone intended the Upon determining that has service, determines status each are members sends an accept responding unit phone, thereby completing between