michaeljdur@yahoo.com on 4 Oct 2010 14:56:35 -0700

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Re: [PLUG] Networking Cat5e cable question....

  • From: "michaeljdur@yahoo.com" <michaeljdur@yahoo.com>
  • To: plug@lists.phillylinux.org
  • Subject: Re: [PLUG] Networking Cat5e cable question....
  • Date: Mon, 4 Oct 2010 14:56:30 -0700 (PDT)
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I've found some cable is more or less difficult to deal with.
Have you tried a different crimper?  
Have you had someone else try to make a cable with this stuff?

Here are some problems I've witnessed with fabrication technique:

Are you using a standard wiring pinout like EIA/TIA-568a/b?  The cables will be unreliable and lose integrity over distance if you use a funky pinout.  The twists in UTP are important.

When you remove the outer sheath from the cable are you nipping any of the twisted pairs?  This happens a lot if you use the razor on the crimping tool to remove the pvc sheath.  It's ok to do that, but if you're using this method use the pull string in the cable to expose the amount of undisturbed wire you want to work with and cut off from where you originally cut the sheath and above.  A better way is to get a pair of contractor scissors (I prefer Klein 2100-7) that have a handy notch for removing the sheath like a hot knife through butter.  

Once you've arranged the wires trim them relatively straight, and to a length that will allow the connector to bite the sheath when you crimp it.  Straightness will help you make sure each wire is making contact at the end of the cable where it needs to.  If the sheath isn't in the connector doing anything with the cable can pull a wire loose.

Best of luck!

> >  "Mike Sheinberg" <m.sheiny@gmail.com>
> wrote:
> >
> > >I'm having some issues with a new box of 1000'
> cat5e cable and was
> > wondering
> > >if anyone on here could provide some advice. I
> know this isn't exactly a
> > >Linux question but it's general networking and I
> figured it would be in
> > the
> > >same ballpark for many of you :)
> > >
> > >Anywhoo, a lot of the patch cables I am making is
> failing to light up the
> > >'link' lights when I plug them into various
> devices. I have made a couple
> > >successful ones that work but the majority of them
> are a huge headache and
> > >are not working. The weird part is we have two
> cat5 network cable testers
> > >here, both of them confirm that all my lines match
> up and that both ends
> > of
> > >the cable are identical (one of the devices even
> gives me an accurate
> > >reading of the cable lengh). Still though I have
> issues plugging these
> > into
> > >devices. At this point I'm wondering if there's
> something wrong with the
> > >cable, or wrong with the RJ45 end pieces, or a
> weird combination of both.
> > Do
> > >Cat5e cables require a different
> rating/class/whatever of RJ45 ends than
> > >cat5 cables? I don't seem to have this issue when
> I'm making traditional
> > >cat5 patch cable...
> > >
> > >Thanks in advance for any pointers.
> > >-Mike
> >

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