User Manual

Appendix
277
For SIP-T19P and SIP-T21P IP phones, it
configures the LCD’s contrast of the IP phone
only.
Note: We recommend that you set the contrast
of the LCD screen to 6 as a more comfortable
level. It is only applicable to SIP-T19P, SIP-T21P
and SIP-T28P IP phones, and EXP39 connected
to SIP-T26P and SIP-T28P IP phones.
Format
Integer
Default Value
6
Range
1 to 10
Example
phone_setting.contrast = 6
Parameter-
phone_setting.active_backlight
_level
Configuration File
<y0000000000xx>.cfg
Description
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.
Format
Integer
Default Value
2
Range
1 to 3
Example
phone_setting.active_backlight_level = 2
Parameter-
phone_setting.backlight_time
Configuration File
<y0000000000xx>.cfg
Description
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