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E911 call blocking for non-initialized wireless telephones

  • US 20070041516A1
  • Filed: 05/25/2006
  • Published: 02/22/2007
  • Est. Priority Date: 05/26/2005
  • Status: Active Grant
First Claim
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1. A method of blocking an undesirable call from being routed to an intended recipient, comprising:

  • associating a simulated callback phone number with said undesirable call;

    querying a mobile positioning center (MPC) for routing instructions for said undesirable call;

    comparing said simulated callback phone number with a known list of callback phone numbers to be blocked; and

    if a match is made by said comparing, blocking routing of said undesirable call to said intended recipient at said mobile positioning center (MPC).

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