FIELD: radio engineering, communication.
SUBSTANCE: car navigation device (1) with a loudspeaker function establishes a Bluetooth connection with a cellular telephone (10). Upon receiving from the cellular telephone (10) outgoing call history data and incoming call history data that were stored on the cellular telephone (10) before setting up the Bluetooth connection, the car navigation device (1) stores in working memory (6) the received outgoing call history data and the received incoming call history data the same as outgoing call history data and incoming call history data of the car navigation device (1) itself. When making an outgoing call using outgoing call history data and incoming call history data stored in working memory (6), a display device displays its own outgoing call history data along with data stored in working memory.
EFFECT: wider range of equipment.
10 cl, 31 dwg
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