Yealink SIP-T48G Administrator's Manual page 78

Microsoft Lync Edition Administrator's Guide for SIP-T2_Series and T4_Series IP Phones
You can configure the backlight time as one of the following types:
Always Off: Backlight is turned off permanently (not applicable to SIP-T48G IP

phones).
Always On: Backlight is turned on permanently.

15s, 30s, 60s, 120s, 300s, 600s or 1800s: Backlight is turned off when the IP phone is

inactive after a preset period of time (in seconds), but it is automatically turned on
if the status of the IP phone changes or any key is pressed. (300s, 600s and 1800s
are not applicable to SIP-T22(P) IP phones.)
Backlight Active Level is used to adjust the backlight intensity of the LCD screen when
the phone is active. Backlight Inactive Level is used to adjust the backlight intensity of
the LCD screen when the phone is inactive. Backlight Active Level and Backlight
Inactive Level are only applicable to SIP-T48G IP phones.
The following table lists available methods and configuration options to configure the
backlight of phone models.
Phone Model
SIP-T48G
SIP-T22(P)
Procedure
Backlight can be configured using the configuration files or locally.
Configuration
File
Local
66
Configuration
Methods
Configuration Files
Web User Interface
Phone User Interface
Configuration Files
Web User Interface
Phone User Interface
<y0000000000xx>.cfg
Web User Interface
Phone User Interface
Configuration Options
Backlight Inactive Level
Backlight Active Level
Backlight Time
Backlight Time
Configure the backlight of the LCD
screen.
Parameters:
phone_setting.active_backlight_level
phone_setting.inactive_backlight_leve
phone_setting.backlight_time
Configure the backlight of the LCD
screen.
Navigate to:
http://<phoneIPAddress>/servlet?p=s
ettings-preference&q=load
Configure the backlight of the LCD
screen.