Yealink SIP VP-T49G User Manual page 171

The value of exposure compensation ranges from 1 (lowest)-3 (highest), the default value is
Off.
Select the desired value from the pull-down list of Flicker.
3.
Flicker - Adjusts the flickering of your video captured by the camera sensor. You can set to
50 Hz (flicker avoidance for Europe and Asia) or 60 Hz (flicker avoidance for North America).
The default value is 50 Hz.
Click Confirm to accept the change.
4.
Note Exposure can be configurable via web user interface only.
Basic Phone Features
171