Analog cameras are relatively troublesome
Here is a brief introduction to the network cameras, because I have used the Netvision Worry-Free Network Camera, so I know a little bit about it, heh heh
The network cameras are connected to the power supply and the network cable (which can be used on the wide-area network), and the IP settings and the port settings are set up in the manual accordingly, then the client software can be used to watch or the browser to watch. The camera is connected to a power supply and a network cable (which can be connected to a WAN), and the IP and port settings are configured according to the manual.