[PLUG] cat 5E patch cable

[Russell Senior]

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.lists at 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.lists at 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
> >
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