Last night I had a ~25m run of cat5e cable suddenly fail, interrupting season 4 of House of Cards! The cable seemed to be sending some sort of spurious signal back to my router as all internet connectivity was lost until the patch cable was unplugged from the router.
I have a digitus LAN cable tester which is working, but as soon as I plug the transmitter into either end of the cable termination the Tx led indicators for the tones stop altogether. I hastily repunched the wires (admittedly in frustration before going to bed) with the same result.
I’m resigned to the fact that I’m probably going to have to replace the entire cable run (not an easy job), but is anyone able to follow what I have just written and have any ideas what has gone wrong?