AASTRA 4224 Operator for MX-ONE User Guide - Manual (Page 29)

29 Dialog 4224 Operator
Preparing the terminal
Display backlight
You can adjust the display backlight level.
ê *5
Press and hold simultaneously until a ring signal is heard.
The display shows
Setting Mode
.
Ô
Automatic
answer Press.
ì
Press repeatedly to adjust the backlight level. #
Press to save and exit.
Note: To exit the menu without saving the changes, press
#
before you press any of the adjustment keys.