Method and apparatus for intercept of wireline communications

A method of intercepting calls for a subject under surveillance (SUS) in a Signaling System 7 (SS7) Intelligent Network (IN) compliant telephone system, wherein the SUS is provided an apparent telephone number that others use to call the SUS on the SUS's subscriber line, comprising:

• in an end office switch, configuring the identity of the line card for the SUS to a surveillance telephone number assigned for surveillance purposes so that calls placed by the SUS identify the calling party by the surveillance telephone number;
• configuring of the end office switch to send messages to the delivery function unit and to receive instructions from the delivery function unit so that the calls placed by the SUS are forwarded to a delivery function unit, and so that calls placed to the SUS using the apparent telephone number are forwarded to the delivery function unit;
• the delivery function unit receiving the forwarded calls, and identifying the SUS by the surveillance telephone number as the calling party or by the apparent telephone number as the called party;
• the delivery function unit forwarding calls placed by the SUS back to the end office switch with the calling party identified with the SUS's apparent telephone number and with the called party telephone number provided by the SUS so that the end office switch forwards calls placed by the SUS to the called party, and forwarding calls placed to the SUS to the end office switch with the surveillance telephone number as the called party telephone number and with the calling party telephone number the same as received from the end office switch so that calls placed to the SUS are connected to the SUS's subscriber line;
• and
• the delivery function unit further obtaining a copy of call content for any calls forwarded through the delivery function unit.

A method of intercepting calls for a subject under surveillance (SUS) in a Signaling System 7 (SS7) Advanced Intelligent Network (AIN) compliant telephone system, comprising:

• arming at least one AIN call processing trigger in an end-office switch for a SUS's telephone line;
• the at least one trigger causing a message to be sent to a delivery function unit upon a call originating from the SUS to a called party on the SUS's telephone line;
• in response to the message, the delivery function unit instructing the end-office switch to forward the call to the delivery function unit;
• the delivery function unit forwarding the respective call back to the end-office switch to be connected to the called party;
• and
• obtaining call content of the call using the delivery function unit while the call is being forwarded through the delivery function unit.

A method of intercepting calls for a subject under surveillance (SUS) in a Signaling System 7 (SS7) Intelligent Network (IN) compliant telephone system, wherein the SUS is provided an apparent telephone number that others use to call the SUS on the SUS's telephone line, comprising:

• in an end office switch, configuring the identity of the line card for the SUS to a surveillance telephone number assigned for surveillance purposes so that calls placed by the SUS identify the calling party by the surveillance telephone number;
• configuring of the end office switch to send messages to the delivery function unit and to receive instructions from the delivery function unit so that the calls placed by the SUS are forwarded to a delivery function unit;
• the delivery function unit receiving the forwarded calls, and identifying the SUS by the surveillance telephone number as the calling party or by the apparent telephone number as the called party;
• the delivery function unit forwarding calls placed by the SUS back to the end office switch with the calling party identified with the SUS's apparent telephone number and with the called party telephone number provided by the SUS so that the end office switch forwards the call to the called party;
• and
• the delivery function unit further obtaining a copy of call content for calls forwarded through the delivery function unit.