How do I connect a third party camera?

You will need a PC and the manufacturers IP tool to address the camera(s) IP address within the same scheme as the internal NIC of the NVR (172.16.0.x). Now go to the camera management within the NVR, switch the port that the camera(s) are plugged into from PNP to IP address, protocol will be ONVIF, port will be 80 (HTTP port of the camera) and type in the username and password of the camera and it should connect. Some manufacturers require ONVIF to be enabled within the camera before adding to different unit. Please check their website for information on how to enable ONVIF.