User Guide

Yealink EXP20 User Guide
46
phone-specific user guide .
Adjusting the Backlight
You can adjust the backlight on the LCD screen of the EXP20 LCD expansion module via the host
phone. The backlight on the LCD screen of the EXP20 LCD expansion module is synchronized
with that of the host phone.
Backlight has three options:
Backlight Active Level: The intensity of the LCD screen when the phone is activity. You can
choose a value to represent the intensity.
Backlight Inactive Level: The intensity of the LCD screen when the phone is inactivity. You can
choose a low intensity or turn off the backlight. It is not applicable to SIP-T27P/T27G IP phones.
Backlight Time: The delay time to change the intensity of the LCD screen when the phone is
inactivity. You can choose a designated time to change the intensity or turn on the backlight
permanently.
You can adjust the backlight on the LCD screen of the EXP20 LCD expansion module from the
following options:
 Always On: Backlight is on permanently.
 Always Off: Backlight is off permanently. It is only applicable to SIP-T27P/T27G IP phones.
 15s, 30s, 1min, 2min, 5min, 10min or 30min: Backlight is turned off when the phone is
inactive after the designated time (in seconds).
To adjust the backlight on the LCD screen of the EXP20 LCD expansion module connected
to the host phone (Taking the SIP-T29G IP phone as an example for reference):
1. Press Menu->Basic->Display->Backlight on the host phone.
2. Press or , or the Switch soft key to select the desired level from the Backlight
Active Level field on the host phone.
3. Press or , or the Switch soft key to select the desired level from the Backlight
Inactive Level field on the host phone.
4. Press or , or the Switch soft key to select the desired type from the Backlight
Time field on the host phone.
5. Press the Save soft key to accept the change or the Back soft key to cancel on the host