Yealink SIP-T4X Administrator's Manual page 57

3. Click Confirm to accept the change.
To change the wallpaper via phone user interface:
1. Press Menu->Basic->Display->Wallpaper.
2. Press or , or the Switch soft key to select the desired wallpaper.
3. Press the Save soft key to accept the change.
Backlight determines the brightness of the LCD screen display, allowing users to read
easily in dark environments. Backlight time specifies the delay time to turn off or dusky
the backlight when the IP phone is inactive. Backlight time is applicable to SIP-T4X IP
phones and EXP40 connected to SIP-T48G/T46G IP phones.
You can configure the backlight time as one of the following types:
Always On: Backlight is turned on permanently.

15, 30, 60, 120, 300, 600 or 1800 (seconds): Backlight is turned off or turned dusky

when the IP phone is inactive after a preset period of time. It is automatically turned
on if the status of the IP phone changes or any key is pressed.
Backlight Active Level is used to adjust the backlight intensity of the LCD screen, and
Backlight Inactive Level is used to turn off or dusky the backlight after a period of
inactivity. Backlight Active Level is only applicable to SIP-T48G and SIP-T46G IP phones
and the connected EXP40. Backlight Inactive Level is only applicable to SIP-T48G and
SIP-T46G IP phones.
Procedure
Backlight can be configured using the configuration files or locally.
Configuration File
Local
To configure the backlight via web user interface:
1. Click on Settings->Preference.
<y0000000000xx>.cfg
Web User Interface
Phone User Interface
Configuring Basic Features
Configure the backlight of the
LCD screen.
For more information, refer to
Backlight on page 268.
Configure the backlight of the
LCD screen.
Navigate to:
http://<phoneIPAddress>/servlet
?p=settings-preference&q=load
Configure the backlight of the
LCD screen.
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