Yealink SIP-T2 SERIES Administrator's Manual page 154

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
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.
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 is applicable to SIP
VP-T49G IP phones, SIP-T48G/T46G IP phones and the connected EXP40, SIP-T29G/T27P IP
phones and the connected EXP20. Backlight Inactive Level is only applicable to SIP
VP-T49G, SIP-T48G, SIP-T46G and SIP-T29G IP phones.
Note
It is not applicable to SIP-T19(P) E2 IP phones.
Before you adjust the LCD's backlight of expansion module, make sure the expansion
module has been connected to the IP phone.
The following table lists available methods and configuration options to configure the
backlight of phone models/expansion modules.
Phone Model (and the
connected expansion
module)
SIP
VP-T49G/SIP-T48G/T46G/
T29G
SIP
VP-T49G/SIP-T48G(EXP40
)/T46G(EXP40)/T29G(EX
P20)/T27P(EXP20)
SIP-T42G/T41P/T40P/T23P
/T23G/T21(P) E2/CP860
Procedure
Backlight can be configured using the configuration files or locally.
Configuration
File
132
Configuration
Methods
Configuration Files
Web User Interface
Phone User
Interface
Configuration Files
Web User Interface
Phone User
Interface
Configuration Files
Web User Interface
Phone User
Interface
<y0000000000xx>.cfg
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_level