Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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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)
T29G(EXP20)
Inactive Level (not applicable to EXP50/EXP43)
Active Level
Backlight Time (not applicable to EXP50/EXP43)
T53W/T53(EXP50)
T43U(EXP43)
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.
Parameter phone_setting.active_backlight_level
<y0000000000xx>.cfg
Description
It configures the intensity of the LCD screen when the phone is active.
Note: If the expansion module is connected, the backlight on the expansion module automatically
changes to match this setting.
Permitted
Values
Integer from 1 to 10
Default
8
Supported
Devices
T57W, T54W, T53W, T53, T48U, T48S, T48G, T46U, T46S, T46G, T43U, T42U, T29G, T27G
Web UI
T48S/T48G/T46S/T46G/T29G/T27G:
Settings > Preference > Active Backlight Level
T57W/T54W/T53W/T53/T48U/T46U/T43U/T42U:
Settings > Preference > Active Level
Phone UI
Color Screen Phones:
Menu > Basic > Display > Backlight > Active Level
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