Yealink SIP-T4X Administrator's Manual page 58

Administrator's Guide for SIP-T4X IP Phones
2. Select the desired value from the pull-down list of Backlight Inactive Level.
3. Select the desired value from the pull-down list of Backlight Active Level.
4. Select the desired value from the pull-down list of Backlight Time (seconds).
5. Click Confirm to accept the change.
To configure the backlight via phone user interface:
1. Press Menu->Basic->Display-> Backlight.
2. Press
Backlight Active Level field.
3. Press
Backlight Inactive Level field.
4. Press
Backlight Time field.
5. Press the Save soft key to accept the change.
Some menu options are protected by two privilege levels, user and administrator, each
with its own password. When logging into the web user interface, you need to enter the
user name and password to access various menu options.
A user or an administrator can change the user password. The default user password is
―user‖. For security reasons, the user or the administrator should change the default
user password as soon as possible.
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or , or the Switch soft key to select the desired level from the
or , or the Switch soft key to select the desired value from the
or , or the Switch soft key to select the desired time from the