Broken wire number 6 in ethernet cable how to locate breakage.

[amateurSparky]

Hi
I did a tdr test it said the break was 0.1m in. I chopped off a little more than 10cm. Now the tdr test tells me pairs 3 and 6 are 21 meters long which is the same as the others.
I did a continuity test but all passed except for number 6.

Am confused which test is telling the truth and how can fix my cable?

 

[endecotp]

Any external signs of damage to the cable?

I don't know how accurate the TDR tests ought to be, but I'd be surprised if they are as good as 10cm. Gigabit ethernet has a symbol rate of 125 Msymbols/s, i.e. a period of 8 ns. If the PHY chip is using the same circuitry for the TDR, then it might be able to measure a reflection time to an accuracy of 8 ns - which is about 3 meters. I.e. 1.5 meters out-and-back. Maybe it does better than that, but probably not by an order of magnitude. I guess I would interpret "fault at 10cm" as "plug is broken", or similar.

 

[secureiam]

I agree likely to be connectors at 0.1, but chop off just behind the connector, then peel back a bit before putting a new connector on.

It’s likely the cables could be damaged at the pooling the out sheath was cut.