AASTRA 4425 IP Vision for BusinessPhone User Guide - Manual (Page 100)

Settings
BusinessPhone – Dialog 4425 IP Vision 100
Backlight
(Dialog 4425 v. 2 phone only).
The display backlight level can be changed.
Change the backlight level on the display
Settings Select Settings in the top menu (see display).
E
or
F
Press (see display).
Repeat until the Display Backlight menu is framed.
Select Press (see display).
The displays shows:
- or + Press to decrease or increase the contrast (see display).
Note: The menu key Cancel can be used to leave the menu
without saving the changes.
Save Press to store the contrast level (see display).
Exit Press to return to the previous menu (see display).
or. Æ
Press to return to idle mode.
Settings CallList Contacts CorpDirectory Web
Backlight
Cancel - +