Really strange scenario. I have an in-wall cat5e cable running between two rooms in my house. The cable is terminated at both ends with a keystone connector and wall plate. For a couple years this worked fine with wireless router + wired PC in Room A and media server in Room B. Recently I wanted to move the router closer to another location in the house to balance the wireless range, so I moved it from Room A to Room B. The wireless still works fine but now the wired connection back to Room A does not work. When I switch it back, it works fine again. I can't figure why this setup only seems to work one way.