Patent ID: 6434395
Filing Date: 2002-08-13
Classification: H04W

Abstract:
A telephone handset that communicates with analog cellular signals and with cellular digital packet data (CDPD) signals over frequency channels, comprising:analog cellular signal circuitry that transceivers analog cellular signals; CDPD signal circuitry that transceivers CDPD signals; a discriminating circuit that discriminates between analog cellular signals and CDPD signals; and a control processor, coupled to the discriminating circuit, that controls the analog cellular signal circuitry and the CDPD signal circuitry such that the CDPD signals are transceived over the same frequency channels as the analog cellular signals, wherein the analog cellular signal circuitry and the CDPD signal circuitry are operatively coupled to a single, common radio frequency transceiver, wherein the radio frequency transceiver is responsive to the control processor, and wherein the discriminating circuit is responsive to a difference in paging signals that contain information about analog cellular signals and paging signals that contain information about CDPD signals to cause the control processor to switch between the analog cellular signal circuitry and the CDPD signal circuitry.