Yealink SIP-T2xP Administrator's Manual page 302

Administrator's Guide for SIP-T2xP and SIP-T19P IP Phones
Parameter-
phone_setting.active_backlight_l
evel
Description
Format
Default Value
Range
Example
Parameter-
phone_setting.backlight_time
Description
Format
Default Value
Range
286
Configuration File
<y0000000000xx>.cfg
Configures the backlight idle intensity used to
adjust the backlight intensity of the LCD
screen
Level 3 is the brightest.
Note: It is only applicable to SIP-T28P IP
phones and the connected EXP39.
Integer
2
1 to 3
phone_setting.active_backlight_level = 2
Configuration File
<y0000000000xx>.cfg
Configures the delay time to turn off the
backlight when the IP phone is inactive.
If it is set to 60 (60s), the LCD backlight is
turned off when the IP phone is inactive for 60
seconds.
Note: It is not applicable to SIP-T19P , SIP-T20P
and SIP-T21P IP phones.
Integer
30
Valid values are:
0-Always off
1-Always on
15-15s
30-30s
60-60s
120-120s
300-300s
600-600s
1800-1800s