Yealink T4XS Backlight Issue

[Peter_Yealink]

Hello,

There's another parameter available for T46S(only available for T48G/T48S/T46G/T46S/T29G): phone_setting.inactive_backlight_level=
It configures the intensity of the LCD screen when the phone is inactive.
0-Off
1-Low
If it's set as 0, in your case, T46S screen will turn to dark(turn off completely) after 15s inactive. But for T42S, just as you mentioned it's a grayscale screen, it's not able to turn off the screen completely. So that's why you see the difference between these two models. if you want to keep T46S and T42S as the same behavior, please just set it as "1" on T46S.

Thank you!

Best Regards,
Peter