Silent Ringing; Display Contrast - Aastra Dialog 4220 Lite User Manual

Silent Ringing

If you do not want to be disturbed by the ring signal but
still want to be able to answer an incoming call, you can
switch off the ring signal. Incoming are only indicated by
the flashing line lamp and display information.
When the phone is in idle mode or when ringing:
Press to switch off the ring signal
The mute key lamp is switched on to indicate silent
ringing. The ring signal with automatically be switched on
the next time you lift the handset or press any key.

Display Contrast

(Dialog 4222 Office phone only)
You can adjust the contrast of the display.
Press and hold simultaneously until ring signal is
heard.
The display shows "Settings Mode".
Press.
Press repeatedly to adjust the contrast.
Press to save and exit.
Note: To exit the menu without saving changes, press #
before you press any of the adjustment keys.
Ericsson Dialog 4222
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