Patent ID: 6934548

Claim:
A method for determining the location of a radio telephone device, said method comprising the steps of: uniquely assigning a certain destination telephone number to a particular predetermined public safety answering point; receiving a telephone call from said radiotelephone, said telephone call being directed to and uniquely identifying said destination telephone number; identifying said destination telephone number from said received telephone call; providing a first and a second radio finding device; only after identifying said destination telephone number, causing said first and second radio finding devices to attempt to respectively determine the location of said radiotelephone device by use of signal angle information and, upon respectively determining said location, respectively providing location information; determining whether both said first and said second radio finding devices respectively provided location information; determining said location of said radiotelephone device only if said first and said second radio finding devices each respectively generate location information; and communicating said determined location to said public safety answering point.