Cortelco C60 User Manual

62 

 

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.