1. Video Loss: An event that occurs when no image is input(live video session disconnected) because of the camera, network, system, etc.
2. Recording Fail: An event that occurs when the recording cannot proceed(recording stream not received and recorded) because of the camera, network, system. etc.
3. Check Recording: An event occurs when the system has been scheduled to record normally but the recording does not take place during scheduled intervals. (Unconditionally occurs regardless of schedule or event)