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PBX selective caller identification authentication

  • US 5,953,399 A
  • Filed: 03/13/1997
  • Issued: 09/14/1999
  • Est. Priority Date: 03/13/1997
  • Status: Expired due to Term
First Claim
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1. A method for supplying calling party information for a telephone call originating from a PBX system, coupled to a public switched telephone network (PSTN) and having a telephone number assigned to its terminal address, to a called party station at a remote location, comprising the steps of:

  • receiving from said PBX, at a location in said PSTN, dialed called party telephone number input and calling party identifying information generated by said PBX;

    determining whether said calling party identifying information contains a telephone number that matches the PBX assigned telephone number;

    in response to a non-matching condition in said determining step, accessing a data base;

    comparing said calling party identifying information with said data base;

    routing the call to said called party station; and

    in response to a match between a number contained in said calling party identifying information and a number found in said data base in said comparing step, transmitting said calling party identifying information to said called party station.

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