| 摘要 |
An in-vehicle apparatus determines in the vicinity the presence of a portable terminal designated with a device requiring restriction on radio transmission as a device name thereof. Radio transmission from a cellular phone is thereby restricted. In contrast, when determining in the vicinity the absence of the portable terminal designated with a device requiring restriction on radio transmission, the restriction on radio transmission from the cellular phone is removed. In the event of a person with a cardiac pacemaker getting on the vehicle, if the person carries a portable terminal designated with a device requiring restriction on radio transmission as a device name, the concern of the person about a possibility that the cellular phone has a bad influence on the cardiac pacemaker can be prevented.
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