On Fri, 6 Sep 2013 05:25:55 +0100, Mike Tomlinson
wrote:

En el artículo , Graham.
escribió:

Huh indeed, and I'm also having trouble excepting

accepting

Mike's assertion
that kinking UTP seriously affects performance.

plenty of evidence on Google if you can work out how to use it,
including from people who know what they're talking about, like Belden,
who make the cable.

Kinks cause reflections in the cable - too many and you WILL impact
performance. Might work OK at 10/100 but fail at gigabit, for example.

I know it's a view
that's widely held, but I have never fount it to be a problem unless
the conductors or their insulation are damaged.

Well, that marks you out as a cowboy installer then, doesn't it?

Now that's unbecoming of you. I wanted to provoke a technical
argument, not a personal one and in any case I am not involved with
cable installation on a regular basis, and I have respect for those
that are.

Of course you are correct about not kinking *any* cable and observing
minimum radius of curvature, what I am saying is that kinks in UTP
'per se' will cause no practical ill effect to the signals, unlike
coax based systems.

Clearly, kinks are the most likely areas for failure open circuit of,
or short circuit between the conductors, or rupture of the sheath
causing water ingress and leakage.

So I would have no qualms about using a =100m temporary patch cable
on a reel however many kinks and twists are in it.

My position remains that whilst kinks can promote failure, they do not
of themselves cause problems, unlike squashed coax dialectic.



--
Graham.

%Profound_observation%