Unauthorized call activity detection and prevention systems and methods for a Voice over Internet Protocol environment

  • US 7,916,845 B2
  • Filed: 04/13/2006
  • Issued: 03/29/2011
  • Est. Priority Date: 04/13/2006
  • Status: Active Grant
First Claim
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1. A method for providing call processing in a controlled-environment facility, comprising:

  • receiving a request to place a call from a terminal accessed by a calling party in the controlled-environment facility;

    connecting the call to a called party outside the controlled-environment facility via a Voice over Internet Protocol (VoIP) gateway between the terminal and a public switched telephone network (PSTN) or between the terminal and a wide area network (WAN); and

    detecting three-way call activity in the call by monitoring VoIP signals transmitted between the VoIP gateway and the terminal.

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