We just moved into a new house and I found out they used Cat5 to run the telephone network in the house. I found the junction where all the network/phone lines come together and disconnected all the wires that were capped together.
I put a wire tracker at each wall port to determine which cable end in the junction box belonged to which port and labeled accordingly.
Here's my problem: I swapped out the RJ11 port for an RJ45 and wired it up in the B pattern. I then put another RJ45 port at the end I determined was the matching end and wired it up in the B pattern. I plugged a switch in one end and a router in the other. The switch and router link lights do not come on, but my wire tracker makes it clear that I have the correct wire in the junction box. I tested that the switch and router should be able to talk just fine by taking a long ethernet cable and plugging them in using that- link lights galore.
One last thing to note, it appears that there may be some current running on the line, somehow, even when nothing is plugged in. My wire tracker lights up, but doesn't buzz, over every single wire in the junction box, and even at the outlet in the room before I have plugged anything in to pass a signal.
How is this possible when I've disconnected every wire from each other in the junction? I just assumed that from wall jack to junction box would be a straight shot and this would be easy as cake- 12 hours later, not so much.