There are different options to work with CCTV Cameras, Option 1: Connect IP Cameras with KVM Node's system network switch by UTP directly (as in the schematic you sent). IP Camera should support H.264, H.265 protocol with RTSP streaming; It's OK for projects with small quantity cameras; Option 2: Capture the camera's video content via NVR's physical HDMI/DVI port, by connecting our Encoder Node with it. If so, just consider NVR as a regular video source device; Option 3: Capture the camera list and stream via their VMS platform. It's required customized development to work with platform by their SDK, which takes time to develop and additional cost;