RE: CAT5 Testing

["Keith Doxey" <ukha@xxxxxxxxxxx>]

Hi John,

Basic testing can be done with a few resistors.

Connect 100R across far end of blue pair
Connect 220R across far end of orange pair
Connect 330R across far end of green pair
Connect 470R across far end of brown pair

Using a multimeter the readings from the patch panel end should be slightly
higher than the resistor values.

If you get a reading of only a few ohms then that pair is short circuit
somewhere due to damage. If you dont get a reading the pair is open circuit
due to damage.

Then check between pair. You shouldnt get any reading at all. If you do,
the
cable is damaged.

Another way if you already have access to a CAT5 tester is to get some
spring clip type speaker terminals and wire them to half of a CAT5 patch
cord. Connect the cable to the terminals and use the tester as if the
sockets were already terminated.

Hope that helps

Keith

> -----Original Message-----
> From: Benfield, John (Penta) [mailto:john.benfield-eds@xxxxxxx]
> Sent: 30 March 2005 11:07
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] CAT5 Testing
>
>
>
> After a long weekend running lots and lots of CAT5 (around 2000m
> I guess (is
> it enough - probably not)), I was wondering if there is any simple way
of
> testing the cables before all of the walls are plaster boarded
> etc? I guess
> the only way to really test them is to terminate and put a tester on,
but
> don't really want to do the terminations yet.
>
> On a separate topic. If I had two patch panels at different ends of a
> building and wanted to joint them together, how would you do
> that? I will be
> running multiple type of signal over the panels (ie telephone, tv) so
a
> direct connection would be required.
>
> JB
>
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