Patent ID: 7031656

Claim:
A hands-free telephone conversation system comprising: a communication device; and a relay device, wherein the communication device includes: a first voice input unit operable to receive voice from a user; a voice output unit operable to output voice of an other party of a telephone conversation; and a first wireless communication unit operable to wirelessly send the user's voice to the relay device, and to wirelessly receive the other party's voice from the relay device, and wherein the relay device includes: a second voice input unit operable to receive voice from the user; a second wireless communication unit operable to wirelessly send the other party's voice to the communication device, and to wirelessly receive the user's voice from the communication device; a first wireless communication status detection unit operable to detect a status of the wireless communication between the first wireless communication unit and the second wireless communication unit; a voice input switch unit operable to select either the first voice input unit or the second voice input unit based on a detection result of the first wireless communication status detection unit; a network communication unit operable to send the user's voice that is received by the selected one of the first voice input unit and the second voice input unit to a communication device of the other party of the telephone conversation through a communication network; and a voice input switch message generation unit operable to generate a message that notifies the other party of the telephone conversation of a selection by the voice input switch unit, wherein the network communication unit sends the message generated by the voice input switch message generation unit to the other party's communication device through the communication network.