| 摘要 |
PROBLEM TO BE SOLVED: To provide an on-vehicle visual telephone system which controls an incoming tone in accordance with the driving condition so as not to hinder safe driving. SOLUTION: The on-vehicle visual telephone system is constituted of an on-vehicle navigation device and an on-vehicle visual telephone. The on-vehicle navigation device displays an enlarged picture on a display device at an intersection for right or left turn or the like when guiding the vehicle, for example, along a guide route. The on-vehicle navigation device makes a busy signal active at the time of display of the enlarged picture. The on-vehicle visual telephone doesn't sound the incoming tone regardless of incoming of a call while the busy signal is active, and the on-vehicle visual telephone informs a user of incoming after the busy signal is made non-active. |
