Yealink SIP-T48G Administrator's Manual page 125

Details of the Configuration Parameter:
Parameter
phone_setting.contrast
Description:
Configures the contrast of the LCD screen.
For T48G/T46G IP phones, it configures the LCD's contrast of the connected EXP40
only.
For T29G IP phones, it configures the LCD's contrast of the connected EXP39/EXP20
only.
For T27P IP phones, it configures the LCD's contrast of the IP phone and the
connected EXP39/EXP20.
For T40P/T23P/T23G/T21(P) E2/T19(P) E2 and CP860 IP phones, it configures the LCD's
contrast of the IP phone.
Note: We recommend that you set the contrast of the LCD screen to 6 as a more
comfortable level.
Web User Interface:
Settings->Preference->Contrast
Phone User Interface:
Menu->Settings->Basic Settings->Display->Contrast
To configure contrast via web user interface:
1. Click on Settings->Preference.
Phone User Interface
Configuring Basic Features
screen.
Navigate to:
http://<phoneIPAddress>/servlet
?p=settings-preference&q=load
Configure the contrast of the LCD
screen.
Permitted Values
Integer from 1 to 10
Default
6
105