| 摘要 |
An in-vehicle handsfree apparatus establishes a handsfree profile connection with each of a first cellular phone and a second cellular phone at the same time. When the first cellular phone is under telephone call, the second cellular phone receives an incoming call. The in-vehicle handsfree apparatus receives from the second cellular phone a ring tone, which is previously registered in the second cellular phone. Herein, the in-vehicle handsfree apparatus does not output the ring tone registered in the second cellular phone. Instead, the in-vehicle handsfree apparatus generates a ring tone to thereby output it in addition to a reception sound received from the first cellular phone under the telephone call.
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