Administrator’s Guide for SIP-T2xP and SIP-T19P IP Phones
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Backlight determines the brightness of the LCD screen display, allowing users to read
easily in dark environments. Backlight time specifies the delay time to turn off the
backlight when the IP phone is inactive. Backlight time is only applicable to SIP-T22P,
SIP-T26P and SIP-T28P IP phones, and EXP39 connected to SIP-T26P and SIP-T28P IP phones.
Backlight turns off quickly if a short backlight time is configured, this may not give users
enough time to read messages. Backlight active level is used to adjust the backlight
intensity of the LCD screen. Backlight active level is only applicable to SIP-T28P IP phones
and the connected EXP39.
You can configure the backlight time as one of the following types:
Always Off: Backlight is turned off permanently.
Always On: Backlight is turned on permanently.
15, 30, 60, 120, 300, 600 or 1800: 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.
The following table lists available methods and configuration options to configure the
backlight of each phone model.
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