Patent ID: 8280450

Claim:
A hands-free phone-call device having a sound collecting unit that collects voices and converts the voices to a voice signal, a communication unit that transmits the voice signal to a cellular phone terminal and receives a voice signal from the cellular phone terminal according to a predetermined communication protocol, and a reproducing unit that reproduces the voice signal received in the communication unit and enables the cellular phone terminal to execute hands-free phone call, comprising: a signal processor that subjects the voice signal converted in the sound collecting unit or the voice signal reproduced in the reproducing unit to signal processing to adjust tone quality to a predetermined state; a storage unit having a parameter setting table that is used when the signal processing is executed in the signal processor and stores parameter information representing whether a tone adjusting function of adjusting tone quality during phone call is provided or not and whether the tone adjusting function can be stopped or not, the parameter information being stored in association with the machine type of each cellular phone; and a controller that obtains information on the machine type of a cellular phone terminal from the cellular phone terminal when the cellular phone terminal is connected to communicate through the communication unit, refers to the parameter setting table to determine on the basis of the information in the machine type obtained from the cellular phone terminal whether the tome adjusting function of the cellular phone terminal can be stopped or not, transmits a predetermined command to the cellular phone terminal when it is determined that the tone adjusting function of the cellular phone terminal can be stopped, thereby stopping the tone adjusting function of the cellular phone terminal, and makes the signal processor execute the signal processing.