Patent ID: 7430441

Claim:
A portable radio communication apparatus comprising: a first communication unit to perform radio communication with a base station of a mobile communication network; a second communication unit to perform radio communication with a handsfree apparatus via a voice channel and a data channel; a mode switching unit to switch an operation mode between a first mode and a second mode, wherein the first mode enables a phone conversation using a microphone and a speaker of the portable radio communication apparatus, and wherein the second mode enables the phone conversation using the handsfree apparatus by transmitting voice data received from the base station through the first communication unit to the handsfree apparatus through the second communication unit and by transmitting voice data received from the handsfree apparatus through the second communication unit to the base station through the first communication unit; a detecting unit to detect a disconnection of the voice channel during the phone conversation in the second mode set by the mode switching unit; a time counting unit to count an elapsed time from when the disconnection of the voice channel is detected by the detecting unit; and a control unit to perform control to end the phone conversation when the control unit receives a control signal indicating a disconnection of the data channel from the handsfree apparatus before the elapsed time counted by the time counting unit exceeds a fixed value, and to perform control to continue the phone conversation by controlling the mode switching unit to switch the operation mode to the first mode when the control unit does not receive the control signal indicating the disconnection of the data channel from the handsfree apparatus before the elapsed time counted by the time counting unit exceeds the fixed value.