A weak physical is the number one cause of intermittent video loss. For distances under 100 meters, standard UTP (Unshielded Twisted Pair) works. For distances beyond that (up to 2km), you must convert the link to fiber optic or use a network camera with an SFP slot.
Once your internal is stable, you likely want remote access. This creates an external link. network camera networkcamera link
This identifies if you need wireless flexibility or professional-grade stability. What is your primary goal for the system? A weak physical is the number one cause
When your VMS shows "No Signal" or "Network Camera Disconnected," you have a broken . Here is the diagnostic hierarchy: network camera networkcamera link
The Backbone of Modern Security: Understanding Your Network Camera Link