2N IP intercom Configuration Manual page 83

The Camera Preview window displays the current image received from an external
camera. If the external camera is disconnected or configured incorrectly, the N/A
characters are displayed on a blue background.
The External IP Camera Log displays the RTSP communication with the selected
external IP camera including failures and error states if any.
2N TELEKOMUNIKACE a.s., www.2n.cz 83/198