How do you know that your patch cables are good? For simple jumper wires, a multimeter is about all you need to know for sure. But things can get weird in the RF world, in which case you might want to ...
Plugged into Fluke Networks' DTX cable analyzer, thesepatch-cord test adapters certify both shielded and unshielded Category 5e, 6,and 6a cable assemblies to ANSI/TIA 568-C and ISO 11801:2010 ...
A cable running upstairs to a desktop from the router is only carrying 100Mb/s Full Duplex, even when both endpoints are gigabit. When tested with a cable tester, wire 4 is blank and does not connect.