Importance

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Abstract

A method of transmitting a caller's ID Number received by a home base station located within a predefined home base station area to a mobile instrument or station set to a cellular phone mode is provided. The method comprises the steps of receiving the caller's ID Number along with a ring signal at the home base station, determining whether the mobile instrument is set to the cellular phone mode, transmitting the caller's ID Number to the mobile instrument if the mobile instrument is set to the cellular phone mode, storing the caller's ID Number in the home base station if the mobile instrument is not set to the cellular phone mode while continuously checking to detect whether the mobile instrument is set to the cellular phone mode and transmitting the caller's ID Number to the mobile instrument after detecting the mobile instrument has been set to the cellular phone mode, setting a flag at the home base station to represent receipt of the caller's ID Number by the mobile instrument, performing communication via the mobile instrument after clearing the flag when the mobile instrument is detected to have changed to a communication mode by receiving the ring signal, determining whether the flag has been set in the home base station if the ring signal is terminated without performing communication, transmitting the caller's ID Number to the mobile instrument set to the cellular phone mode upon detecting the flag, and clearing the flag upon completing the transmission of the caller's ID Number.

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First Claim