Patent ID: 6472974
Filing Date: 2002-10-29
Classification: G07G,G08B,H04W

Abstract:
A method of operating a selective call system including a primary station and a secondary station, said method comprising:operating the secondary station to receive a first qualifying call from the primary station, the first qualifying call having a characteristic from which the secondary station determines a first set of data; operating the secondary station using the characteristic in the first qualifying call to update a second set of data stored in a non-volatile store of the secondary station when a checksum of the first qualifying call is valid; operating the secondary station to reset the non-volatile store when the checksum of the first qualifying call is invalid; operating the secondary station to receive a second qualifying call from the primary station when the checksum is invalid, the second qualifying call having a characteristic from which the secondary station determines a third set of data; and operating the secondary station using the characteristic in the second qualifying call to store the third set of data in the non-volatile store.