Quote from: BrandyWine on January 21, 2026, 10:30:20 PMThis one says it can do crosstalk tests (but not sure what test for FEXT and NEXT). You can login to Amazon and use Rufus to post a question.
Amazon item B0DSHWHC7R "NOYAFA NF-8601S Network Cable Tester"
Another issue can be Alien Crosstalk, which is much harder to identify.
Crosstalk is an issue because it confuses the transceivers
https://www.flukenetworks.com/blog/cabling-chronicles/cable-testing-101-cross-talk-near-and-far
Thank you, i'll look into that.
Meanwhile, just yesterday, i updated my opnsense appliance to v26.1 , and lo and behold, my wan ethernet connection (between firewall and cablemodem) is up to 1gbs for more then a day now! What has been happening the last months is that it got to 1gbs after a reboot, and after a couple of hours reverted back to 100mbit.
I really hope this is permanent now, since i didnt change anything to my cabling, after the last time when i replaced a piece of cable (which tested ok afterwards) for a factory fresh premium cat7 cable.
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