I have an ethernet tester. It basically energizes one pin at a time and LEDs at the other end indicates whether they are seeing current (so, if there are shorts or miswirings, those are evident). I would really like a time domain reflectometer so that when I screw up a crimp I can tell which end I screwed up. What I do since I don't have the right instrument is to look very closely and guess, then cut off the worst looking end retry the crimp until either it works or I run out of cable.
On Sun, Mar 22, 2020 at 2:52 PM <tomas.kuchta.li...@gmail.com> wrote: > Thanks for the response Rich, > > Reading your suggestion, I realized that I might not check for shorts on > the > final product. I fave rechecked it - no opens, no shorts. > > Multimeter is a device for two point measuring voltage, current, > resistance, > etc. Mine also has a beeper that is what I used. > > So, I clamped the re-crimped ends and measured the continuity and shorts > with > the 2 probes. I did have one bad continuity along the way caused by wire > cut by > my crimping tool wire end cutter. Not anymore. > > Thanks, > Tomas > > On Sun, 2020-03-22 at 14:20 -0700, Rich Shepard wrote: > > On Sun, 22 Mar 2020, tomas.kuchta.li...@gmail.com wrote: > > > > > I have this very special cat5e patch cable - which I am now really > attached > > > to. > > > The cable has good end to end continuity test, but only works at > 100Mb/s. > > > > > > Any ideas what this could be caused by - realistically verifiable > ideas only > > > please? > > > > Tomas, > > > > Did you use a RJ-45 tester? The ones I have will show mis-wired, > shorted, or > > open connections and the speed it's capable of running. What I read in > your > > post is a continuity test with a multi-meter. If you want to send the > cable > > to me I'll test it for you with a specific CAT cable tester. > > > > Rich > > > > _______________________________________________ > > PLUG mailing list > > PLUG@pdxlinux.org > > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ > PLUG mailing list > PLUG@pdxlinux.org > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG mailing list PLUG@pdxlinux.org http://lists.pdxlinux.org/mailman/listinfo/plug