| 摘要 |
PURPOSE: An accessory device of a mobile terminal equipped with an emergency telephone call function and an originating call screening function is provided to generate a difference alarm according to separation distance from an accessory device and to operate a shortcut key in an emergency. CONSTITUTION: An accessory device(20) transfers an emergency call request signal to a mobile terminal(10) through wireless communication. The mobile terminal originates an emergency call to emergency contact information. The mobile terminal restricts an originating call in an abnormal state of a wireless communication state between the mobile terminal and the accessory device. The accessory device generates the emergency signal through an alarm unit.
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