So, not sure if I’m making myself clear, but I recently just witnessed a female RJ45 jack need to be reterminated since it was only receiving PoE but not data. This is probably because the PoE pairs still function with connectors 1 to 8 reversed. We know this because our cable tester showed each conductor reversed with a reflector plugged in. As in, 1-8 should’ve mapped to 1-8 but instead mapped to 8-1. A coworker of mine pulled the head off and examined the pairs, but each color and stripe matched perfectly.

Not sure what happened here. I think it was probably human error since we encounter that sometimes when repairing work that cable contractors do. However, I could see myself making the same mistake since the pairs were all pushed in correctly.