Yealink SIP-T28P - Manual (Page 32)

User Guide for the SIP-T28P IP Phone
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Contrast is configurable via web user interface at the path Settings->Preference.
You can configure backlight to adjust the brightness of the LCD screen. Backlight active
level is used to adjust to the backlight intensity of the LCD screen. Backlight time
specifies the delay time to turn off the backlight when the IP phone is inactive.
You can configure the backlight status on the LCD screen as the following types:

Always Off: Backlight is turned off permanently.

Always On: Backlight is on permanently.

15, 30, 60, 120, 300, 600 or 1800: Backlight is turned off when the phone is inactive
after the specified time (in seconds).
To configure the backlight via phone user interface:
1. Press Menu->Settings->Basic Settings->Display->Backlight.
2. Press or , or the Switch soft key to select the desired level from the Active
Level field.
3. Press or , or the Switch soft key to select the desired type from the
Backlight Time field.
4. Press the Save soft key to accept the change or the Back soft key to cancel.
Backlight is configurable via web user interface at the path Settings->Preference.