Hi,
I had a Qihan N6564F-H NVR with 37 IP cams on a wired network, the qihan was becoming troublesome and took an eternity to start up after each time it "locked up" during the darkest hours of the night,
So, i purchased a Tiandy TC-R3880 80ch NVR, set it up with the same configs and i now have choppy/jumpy streams from all the cams, i have checked the POE switch, i've tested all the CAT6 cables,
none of the cams are getting hot, but i do have 4 or 5 cams disconnecting and reconnecting randomly, unplugging these cams does not cure the original issue.