Hello,
I just got 3 Hikvision cameras installed using cat6 RJ45 cables off Amazon. The 75 ft cable works fine. I plugged the Hikvision camera into port #1 on the Hikvision NVR, and it came up after a short time. I've had 2 more Hikvision cameras plugged into the NVR with 50 ft and 100 ft...