| 摘要 |
PROBLEM TO BE SOLVED: To allow the user to simply recognize that a key mis-operation prevention function is set. SOLUTION: Basic components of this portable telephone system are an antenna 4, a radio section 5, a transmission/reception section 1, a display section 2, a control section 6, a key depression detection section 8, and a portable set key board 9. When a key of the key board 9 is depressed, a key depression detection section 8 senses the depression of key. The control section 6 receiving the sensing of key depression conducts speech control and state setting control. On the other hand, when a mis-operation prevention key 10 is depressed, a mis-operation prevention detection section 7 sends a mis-operation prevention signal to the control section 6. The control section 6 receiving the mis-operation prevention signal sets a key mis-operation prevention function inactivating the key depression of the key board 9 and lights a light emitting diode 3 when any key is depressed in this state. |
