Yealink SIP-T2

Administrator’s Guide for SIP-T2 /T3 /T4 /T5 /CP920 IP Phones
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Inactive Level: The brightness of the LCD screen when the phone is inactive. You can select a low brightness or
turn off the backlight.
Backlight Time: The delay time to change the brightness of the LCD screen when the phone is inactive. Backlight
time includes the following settings you can choose from:
l
Always On: Backlight is on permanently.
l
Always Off: Backlight is off permanently. It is not available for the
T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G/T33P/T33G IP phone.
l
15s, 30s, 1min, 2min, 5min, 10min or 30min: Backlight is changed when the phone is inactive after the des-
ignated time (in seconds).
Topics
Supported Backlight Options
Backlight and Time Configuration
Supported Backlight Options
The following table lists available configuration options to configure the backlight of phone models/expansion mod-
ules:
Phone Model (and the connected
expansion module)
Configuration Options
T57W(EXP50)
T54W(EXP50)
T48U(EXP43)
T48S/G(EXP40)
T46U(EXP43)
T46S/G(EXP40)
T33P/T33G
T29G(EXP20)
Inactive Level (not applicable to EXP50/EXP43)
Active Level
Backlight Time (not applicable to EXP50/EXP43)
T53W/T53(EXP50)
T43U(EXP43)
T31P/T31G/T31
T27G(EXP20)
T42U
Active Level
Backlight Time (not applicable to EXP50/EXP43)
T42S/G
T41P/S
T40P/G
T23P/G
T21(P) E2
CP920
Backlight Time
Backlight and Time Configuration
The following table lists the parameters you can use to configure screen backlight and time.