US5953399A — PBX selective caller identification authentication

Claim 1

Independent Claim 161 words

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.

Claim 2

Independent Claim 161 words

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.

Claim 3

Dependent Claim 67 words

A method as recited in claim 1, wherein said PSTN comprises an advanced intelligent network having at least one integrated services control point (ISCP), and wherein said accessing step comprises: triggering a PSTN switching facility at said location that is associated with said PBX system; and sending a query message from said switching facility to said data base, said data base being remote from said switching facility.

Claim 4

Dependent Claim 33 words

A method as recited in claim 2, further comprising the step of transmitting said calling party identifying information, without accessing said data base, in response to a matching condition in said determining step.

Claim 5

Dependent Claim 50 words

A method as recited in claim 2, further comprising the step of blocking transmission of said calling party identifying information to said called party station, in response to a failure to match a number contained in said received information with a number in said data base in said comparing step.

Claim 6

Dependent Claim 23 words

A method as recited in claim 4, wherein said blocking step comprises sending a response message from said ISCP to said switching facility.

Claim 7

Dependent Claim 89 words

A method as recited in claim 2, further comprising the steps of: transmitting said calling party identifying information to said called party station; and in response to a failure to match a number contained in said calling party identifying information to a number found in said data base in said comparing step, transmitting to said called party station a message indicating that said information is not authenticated; whereby the calling party identifying information generated by said PBX and the unauthenticated status thereof can be displayed at the called station.

Claim 8

Dependent Claim 101 words

A method as recited in claim 2, wherein said ISCP includes said data base and, in response to a failure to match a number contained in said received information with a number in said data base in said comparing step, further comprising the steps of: accessing a line identification data base (LIDB) in said PSTN that is remote from said ISCP; determining from the LIDB whether the number contained in said received information is a working telephone number; and transmitting said calling party identifying information to said called party station in response to a non-working number determination in said determining step.

Claim 9

Dependent Claim 36 words

A method as recited in claim 7, further comprising the step of blocking transmission of said calling party identifying information to said called party station, in response to a working number determination in said determining step.

Claim 10

Dependent Claim 72 words

A method as recited in claim 7, further comprising the steps of: transmitting said calling party identifying information to said called party station; and in response to a working number determination in said determining step, transmitting to said called party station a message indicating that said information is not authenticated; whereby the calling party identifying information generated by said PBX and the unauthenticated status thereof can be displayed at the called station.

Claim 11

Dependent Claim 43 words

A method as recited in claim 2, wherein said data base is a line identification data base (LIDB) in said PSTN that is remote from said ISCP, and wherein said accessing step further comprises initiating a lookup in said LIDB by said ISCP.

Claim 12

Dependent Claim 75 words

A method as recited in claim 1, wherein said PSTN comprises an advanced intelligent network having at least one integrated services control point (ISCP) interconnecting a plurality of PSTN switching facilities via a common channel signaling link, and wherein said accessing step comprises: triggering a PSTN switching facility that is associated with said called party station; and sending a query message from said switching facility to said data base via said common channel signaling link.

Claim 13

Dependent Claim 34 words

A method as recited in claim 11, wherein said PBX system is coupled to switching facility in a local access transport area (LATA) that is different from the called party associated switching facility LATA.

Claim 14

Dependent Claim 150 words

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: 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.

Claim 15

Dependent Claim 150 words

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: 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.

Claim 16

Dependent Claim 55 words

A network as recited in claim 13, wherein said routing means comprises blocking means for blocking transmission of said calling party identifying information in the routed call to the called party in response to a determination by said determining means that said calling party identifying information is not an authorized representation of the calling station.

Claim 17

Dependent Claim 86 words

A network as recited in claim 13, wherein said routing means comprises messaging means for generating message information indicating that said calling party identifying information is not an authorized representation of the calling station in response to a determination of nonauthorization by said determining means, said routing means including said calling party identifying information and said message information in the routed call; whereby the calling party identifying information generated by said PBX and the nonauthorized status thereof can be displayed at the called party subscriber station.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2002-09-13	2003-03-15	2003-09-14	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2006-09-13	2007-03-15	2007-09-14	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2010-09-13	2011-03-15	2011-09-14	$7700.00	Window Closed / Lapsed

PBX selective caller identification authentication

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