Patent ID: 6256515
Filing Date: 2001-07-03
Classification: H04L,H04M,H04W

Abstract:
A method of controlling calls from a wireless telephone having a device identifier, the method comprising the steps ofreceiving a call stream from the wireless telephone to a switching center in a first telephone network directed to a destination telephone having a destination telephone number in a second telephone network, wherein the call stream contains the device identifier transmitted with a telephone call made from a wireless telephone;retrieving the device identifier from the call stream;searching for the device identifier that corresponds to a control number in a database maintained at the switching center, wherein the control number identifies an approved wireless telephone;connecting the call with the device identifier across a first communication link to a call management center, if the control number is found in the first database;searching for the control number associated with the device identifier of the wireless telephone in a database containing a plurality of control numbers maintained at the call management center, wherein each control number in the first database point to a set of approved telephone numbers;comparing the destination telephone number against the set of approved telephone numbers associated with the control number in the database;requesting an approved access code from the wireless telephone, if the destination telephone number is not one of the telephone numbers associated with the control number in the databasereceiving the access code from the wireless telephone;comparing the access code received from the wireless telephone with the set of access codes associated with the control number residing in a second database at the call management center;if the access codes is valid, connecting the call across a second communication link to a central office in the second telephone network; andconnecting the call through the second telephone network to the destination telephone.