| 摘要 |
An in-vehicle handsfree apparatus performs a dialing control with a first dialing phone number, which is a phone number included in historical data of outgoing or incoming calls of a cellular phone. If the destination of the dialing with the first phone number does not answer, the handsfree apparatus performs a dialing control by using a different second phone number, if it is available from the cellular phone. The second phone number, e.g., a number of a home telephone, is registered in phone book data of the cellular phone by using the same registration name as that of the first phone number; further, the second phone number is transmitted from the cellular phone to the handsfree apparatus.
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