It’s difficult to get a same level of performance with 3rd party cameras. Generally, with regard to transmitting video stream to DirectIP NVRs, 3rd party cameras have lower performance than DirectIP cameras. Because DirectIP protocol has specific multiple stream channels and their video profile and frame rate adjustment technology to satisfy optimal performance of video data transmission for live monitoring, recording, playing, and remote transmitting. So, if you connect 3rd party cameras with our NVRs, the benifits of DirectIP protocols are disappeared.