MOBILE TELEPHONE SYSTEM AND MOBILE RADIO TELEPHONE SET

摘要

PROBLEM TO BE SOLVED: To prevent the occurrence of accident caused by reduction of concentration when driving an automobile while talking by using a mobile radio telephone set. SOLUTION: This mobile radio telephone set (a) is provided with an acceleration sensor 1, a signal processing means 2 for discriminating whether or not acceleration characteristics obtained by the acceleration sensor 1 are approximate to the previously obtained acceleration characteristics in the case of loading the mobile radio telephony equipment on the automobile under traveling, and an acoustic generating means 24 for outputting alarm tone to the telephone set of the opposite side.