PBX selective caller identification authentication
First Claim
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.
4 Assignments
0 Petitions
Accused Products
Abstract
The present invention uses capabilities of the advanced intelligent network (AIN) to control an authentication process of caller ID information data generated at a calling PBX system. The central office switching facility associated with the calling PBX system identifies calls therefrom that contain caller ID numbers that are not the PBX assigned telephone number. For such calls, the switching facility invokes triggers through the AIN common channel signaling network to access data base information in an Integrated Service Control Point (ISCP) and/or system LIDB for authenticating and controllably transmitting caller ID information. Unauthenticated information may be blocked or transmitted with notice that the information has not been authenticated.
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Citations
15 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In a public switched telephone network having a plurality of telephone switching facilities, subscriber telephone lines for connecting said facilities to respective associated subscriber stations, and at least one PBX trunk for connecting one of said switching facilities to an associated subscriber PBX system that serves a plurality of stations connected thereto, the improvement comprising:
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receiving means for receiving called party telephone number input and calling party identifying information generated by said PBX system for a call placed from a calling station connected to said PBX system; determining means for determining whether said received calling party identifying information is a previously authorized representation for identifying the calling station; and routing means for routing said call to its dialed called party destination with said calling party identifying information in response to a determination by said determining means that said calling party identifying information is an authorized representation of the calling station. - View Dependent Claims (14, 15)
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Specification