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this post was submitted on 01 Sep 2023
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Higher end cable testers can show you where the break is, but it will be far more expensive that a new cable.
My TP link switch can detect faults and cable length. I’m not sure it can do both together but it’s possible. Worth checking if you have a switch with those features
Hmm, interesting! I have a Synology switch, gotta read up on its capabilities.
you can rent a time domain reflectometer for this purpose.. it sends out a signal and then listens for the echos back and calculates the distance. problem is they arent accurate the first like 500 feet so you have to add a reel of 500 ft of matching cable to the end first. electrorent.com rents them.
I had an AMD Phenom-II era motherboard that claimed it would be able to do that. OP, you might be able to find an old NIC/mobo that could do this for cheap.