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System and method for blocking a telephone call

  • US 20060285676A1
  • Filed: 05/25/2005
  • Published: 12/21/2006
  • Est. Priority Date: 05/25/2005
  • Status: Active Grant
First Claim
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1. A method of blocking a telephone call from a calling party to a called party, the telephone call received at a local-designated trunk group of a service switching point (SSP), comprising:

  • determining if the Local and Access Transport Area (LATA) of the calling party is interLATA with respect to the SSP;

    where the calling party is interLATA with respect to the SSP, determining a screening indicator value, and blocking the telephone call where the screening indicator value indicates that the telephone call is public telecommunications network provided.

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