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Abstract:
In view of the over 20 million cellular E-911 calls placed annually in the United States, the Federal Communications Commission has issued a Report and Order requiring that either the carriers or the manufacturers provide systems which will identify the location of the E-911 caller to within 125 meters, while at the same time providing the PSAPS with the telephone number of the E-911 caller. The Automatic Location Identification (ALI) and the Automatic Number Identification (ANI) are required respectively in five years and eighteen months from the date of the Report and Order. This paper outlines the history of the attempt to solve the Automatic Location Identification problem in terms of triangulation and GPS approaches and indicates the problems and successes of these approaches. |