| 摘要 |
<p>PROBLEM TO BE SOLVED: To make the size of a radio telephone set small. SOLUTION: A telephone set is provided with a user interface and a control unit connecting to the user interface. The user interface is provided with a display 3 and a keypad 2 having at least one operation key. The control unit controls a function of at least one operation key and displays the function to a preset area of the display 3. Plural states of the radio telephone set are assumed, a group of preset operations for a related state is executed by at least one operation key, and the control unit displays the operation from the operation group as a default function.</p> |
