Patent ID: 8108009

Claim:
An in-vehicle hands free device comprising: a voice line coupling element coupling with an external communication network through a voice line, the external communication network being separate from the in-vehicle hands free device; a communication element providing a communication link with a cell phone, wherein the communication element receives a reception signal from the cell phone when the cell phone receives the reception signal from the external communication network; and a controller controlling reception of the reception signal from the cell phone when the communication element receives the reception signal from the cell phone, wherein the controller determines whether it is possible to control the reception of the reception signal from the cell phone when the communication element receives the reception signal from the cell phone; the controller prohibits reception signal notice action of the cell phone when the controller determines that it is impossible to control the reception of the reception signal from the cell phone; the voice line coupling element is mounted on a vehicle, the voice line coupling element is independent from the cell phone, and the controller determines that it is impossible to control the reception of the reception signal from the cell phone when the voice line coupling element couples with the external communication network through the voice line.