Patent ID: 8116722
Filing Date: 2012-02-14
Classification: H04M,H04W

Abstract:
1. A method of blocking an undesirable emergency voice call from being routed to an intended phone device, comprising: associating a simulated callback phone number with a unique phone device identifier number and an undesirable emergency voice call; querying a mobile positioning center (MPC) for routing instructions for said undesirable emergency voice call, said mobile positioning center (MPC) being distinct and remote from a mobile switching center (MSC); comparing said simulated callback phone number and said unique phone device identifier number with a known list of phone devices to be blocked; and if a match is made by said comparing, blocking routing at said mobile positioning center (MPC) of said undesirable emergency voice call to said intended phone device, by said MPC sending routing instructions including a routing number of a pre-recorded announcement element.