Operation Manual

User Guide for the SIP-T28P IP Phone
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3. Press the Save soft key to accept the change or the Back soft key to cancel.
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 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: 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->Advanced Settings (password: admin) ->Phone
Settings->Backlight.
2. Press or , or the Switch soft key to select the desired level from the
Backlight 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.