Operation
Adjusting the LCD Display Contrast
MC3000 Digital Deskset Operator and Installation Manual 3-21
(6880309L15-A)
• Speaker 1—Handsfree (internal speaker)
• Speaker 2—Handset (ear piece)
• Speaker 3—Headset (ear piece)
To increase the volume of all speakers at the same time, turn the Volume control clock-
wise.
To decrease the volume of all speakers at the same time, turn the Volume control counter-
clockwise.
Note: An installation technician can adjust the volume of the mouthpiece or internal micro-
phone.
Adjusting the LCD Display Contrast
To decrease or increase the LCD display contrast:
At any time you can press and hold the Shift button and the Keypad * (decrease) or Key-
pad # (increase) button to adjust the LCD display contrast.
Note: Adjusting the LCD contrast is the same as adjusting the LCD viewing angle.
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