×

Processing of emergency calls in wireless communications system with fraud protection

  • US 6,038,440 A
  • Filed: 06/23/1997
  • Issued: 03/14/2000
  • Est. Priority Date: 06/23/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for processing calls in a wireless communications system, the method comprising the steps of:

  • detecting a call placed from a mobile station in said system to a multi-digit number dialed by a user of said mobile station;

    determining whether said call is indicated to be fraudulent;

    if said call is indicated to be fraudulent, determining whether said dialed number is a predefined multi-digit emergency number by performing a mini B-number analysis that sequentially compares one or more of the digits of said dialed number to the corresponding digits of said emergency number;

    if said call is indicated not to be fraudulent or if said dialed number is determined to be an emergency number, completing said call; and

    if said call is indicated to be fraudulent and if said dialed number is determined not to be an emergency number, invoking a predetermined fraud handling procedure selected by an operator of said system.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×