| 摘要 |
PROBLEM TO BE SOLVED: To control switching to an automatic incoming response mode regardless of the speed of an automobile, and the elimination of all the display of a display part at the time of loading a portable radio telephone set on an automobile by detecting whether or not the telephone set is in an on-vehicle state or a portable state, and operating the switching of control for allowing the telephone set to operate in the automatic incoming response mode when it is detected that the telephone set is in the on-vehicle state. SOLUTION: In a state that a portable radio telephone set is loaded on an automobile, the radio telephone set is mounted on an on-vehicle holder 14, and the contact of a lead switch 12 is closed by the action of the magnetic field of a magnet 13. When the contact of the lead switch 12 is closed, an incoming mode flag in a storage part 11 is set, and the control of an incoming call in an automatic incoming response mode is set. At the time of the transition of a channel scan state to a waiting state, a control part 3 checks the state of the incoming mode flag, and operates control by reading the program of control in the automatic incoming response mode when the incoming mode flag is in the set state, and eliminates all the display of a display part 9.
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