| 摘要 |
PROBLEM TO BE SOLVED: To provide a portable telephone system for protecting a physically handicapped person from the adverse effects to mind and body by electric noise and electromagnetic waves generated by a portable telephone. SOLUTION: This portable telephone system is provided with a radio wave transmission means 102 for informing the presence of the physically handicapped person 504 to the portable telephone 103 and the portable telephone provided with a function for making radio wave transmission by a communication channel impossible at the time of receiving radio waves from the radio wave transmission means. Also, it is provided with the function for informing the user of the portable telephone by vibration of the portable telephone, sound and display to a liquid crystal panel, etc., based on the reception of the radio waves from the radio wave transmission means to inform the presence of the physically handicapped person 504.
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