To configure backlight via web user interface:
1. Click on Settings->Preference.
2. Select the desired value from the pull-down list of Backlight Active Level (only
applicable to SIP-T28P IP phones and the connected EXP39).
3. Select the desired value from the pull-down list of Backlight Time (seconds).
4. Click Confirm to accept the change.
To configure backlight via phone user interface (only applicable to SIP-T28P IP phones
and EXP39 connected to SIP-T26P and SIP-T28P IP phones):
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.
Note
Before you adjust the LCD’s backlight of expansion module, make sure the expansion
module has been connected to the IP phone.