I have a CCTV camera which is PoE, and an NVR. I already have two cameras connected fine, and have been trying to add a third today.
All the cameras are the same. The cable is Cat5e outdoor.
I've made up two lengths, 1.5m and 18m, the first for testing and the second will be actually used for this camera.
Both cables pass with all 8 lights on the cable tester.
The 1.5m cable works, the camera connects to the NVR.
The 18m cable does not work, the NVR can't see the camera.
I've re-crimped the 18m cable several times, which always passes the cable tester.
With the 18m cable, I know the camera has power, because you can hear a slight 'click' inside when it switches from normal to night vision.
So I can only assume that the 18m cable have signal issues, and not power issues.
Might I have signal issues because the cable is coiled up on the floor, so each part of the cable is right next to lots of other parts of the cable..??
Here's both ends of the 18m cable: