| 摘要 |
A mobile terminal, such as a cellular radiotelephone, is provided with two spaced apart control buttons on the side thereof, operative to control a plurality of controllable functions. In one embodiment, when a call is in progress, pressing either control button adjusts the speaker volume; simultaneously single clicking both buttons toggles a microphone mute control; and simultaneously double clicking both buttons sets the speaker volume to a maximum level. When a call is not in progress, pressing either control button scrolls the menu display; simultaneously single clicking both buttons cancels a highlighted menu choice; and simultaneously double clicking both buttons selects a highlighted menu choice. This provides the user a greater degree of control over the operating parameters of the mobile terminal during a call without interrupting the call by removing the mobile terminal from its operative position, and allows for one-handed navigation of displayed menus when a call is not in progress.
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