8.3.5Function Key
The phone has 8 programmable DSS/Function keys with associated LEDs and 2 programmable Line keys with LEDs. The 4 directional arrow keys and the OK button are also programmable. This screen also sets the LCD contrast and enables the backlight. For additional DSS/Function buttons, up to 5 C10 Expansion modules may be connected.
8.3.5.1Function Keys
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