| 摘要 |
A communication device has an input keypad having physical input keys arranged in a matrix of rows and columns, a mode input mechanism to select a specific mode, and software or firmware responsive to mode selected through the mode input mechanism, comprising a specific mapping of input keys and process of input to output characters, depending on mode selected. In any specific mode, inputs by the physical input keys are mapped to output characters according to the specific mapping and process associated with the selected mode.
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