I mean, the simplest answer is to lay a new cable, and that is definitely what I am going to do - that’s not my question.

But this is a long run, and it would be neat if I could salvage some of that cable. How can I discover where the cable is damaged?

One stupid solution would be to halve the cable and crimp each end, and then test each new cable. Repeat iteratively. I would end up with a few broken cables and a bunch of tested cables, but they might be short.

How do the pro’s do this? (Short of throwing the whole thing away!)

@TitanLaGrange@lemmy.world
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1Y

Wire tracker maybe? You might want a higher quality version than that particular one if the cable run is long, one of the reviews suggest that the distance is limited.

@False@lemmy.world
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You can only do 100M runs max anyways, just replace the whole thing? 100M of CAT6 is pretty cheap if you already have a box for it.

Or is this an academic question?

@PlutoniumAcid@lemmy.world
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51Y

Actual, not academic. And I agree that a new cable is cheap, which is what I will do. My question is about avoiding throwing a mostly good cable in the trash.

@cevn@lemmy.world
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Pull it, cut into quarters. Add jacks to each end and test the lines.

Nvm, I see you suggested this…

@SheeEttin@lemmy.world
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The easiest thing to do would just be to pull it out and look at it. The break might be obvious.

@PlutoniumAcid@lemmy.world
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11Y

Yeah, that’s not that easy, unfortunately, because each end of the network cable passes through an insulated wall, through a hole equal to the cable width = smaller than the plug. Even if I find the break, it is likely in the outdoors part of the cable where I would want an unbroken cable without a field repair.

@SheeEttin@lemmy.world
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Sure, but you’re going to be pulling it out either way. When you do, inspect it.

@myogg@lemmy.world
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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

@PlutoniumAcid@lemmy.world
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21Y

Hmm, interesting! I have a Synology switch, gotta read up on its capabilities.

@Num10ck@lemmy.world
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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.

You only need 2 pairs for 100base-t, try forcing a lower negotiation, see if the pairs you need work? Maybe unbundle the other set of pairs and try them?

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