After the monitoring device is set up, you can preview the video image from the monitoring device to see who is standing at the door station, while making a call to the person before you open the door.
Click of the monitoring device to take a preview of the video image.
Click to call the monitoring device.
3. Click to unlock the access-controlling door phone.
In addition, you can re-select the monitoring device after taking a quick view of the full screen video footage.
Click on the upper area highlighted in the red box.
Select the desired monitoring device.