Yealink T21PE2 User Manual

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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l Always On: Backlight is on permanently.
l Always Off: Backlight is off permanently. It is not available for the T54S/T52S/T48S/T48G/T46S/T46G/T29G IP phone.
l 15s, 30s, 1min, 2min, 5min, 10min or 30min: Backlight is changed when the phone is inactive after the designated
time (in seconds).
Topics
Supported Backlight Options
Backlight Brightness 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
T54S/T52S(EXP50)
T48S/G(EXP40)
T46S/G(EXP40)
T29G(EXP20)
Inactive Level (not applicable to EXP50)
Active Level
Backlight Time (not applicable to EXP50)
T27G(EXP20)
Active Level
Backlight Time
T42S/G
T41P/S
T40P/G
T23P/G
T21(P) E2
CP920
Backlight Time
Backlight Brightness and Time Configuration
The following table lists the parameters you can use to configure screen backlight brightness 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: It is applicable to the T54S/T52S/T48S/T48G/T46S/T46G/T29G/T27G IP phone. If the expansion mod-
ule is connected, the backlight on the expansion module automatically changes to match this setting.
Permitted
Values
Integer from 1 to 10
Default 8
Web UI Settings->Preference->Active Backlight Level
Phone UI T54S/T52S/T48S/T48G/T46S/T46G/T29G:

Yealink T21PE2 Specifications

General

Brand	Yealink
Model	T21PE2
Category	IP Phone
Language	English