OT: Network Cable Tester

[Roger Neth Jr]

The Fluke 620 is probably the easiest tester to use. You have to wire
correctly by wiring standards. Then you can use the tester to test your wire
connection. The tester will give you the wire map e.g. 12364578 or cross
over 36124578. An open could look like this 123o45o8. The Fluke 620 also
gives you a nice audible sound if a cable passes or not. The Fluke 620 has
always worked for me on cat 5 and 5e.

I also had a more expensive Fluke LinkRunner, but never used it as the Fluke
620 did the job much simpler.

Roger

On Thu, Sep 24, 2009 at 3:23 PM, drew einhorn <drew.einhorn at gmail.com>wrote:

> On Thu, Sep 24, 2009 at 3:44 PM, David Curtis <dcurtis at uniserve.com>
> wrote:
> > On Thu, 24 Sep 2009 15:04:23 -0600
> > drew einhorn <drew.einhorn at gmail.com> wrote:
> >
> >> On Thu, Sep 24, 2009 at 1:37 PM, Roger Neth Jr <baypos at gmail.com>
> >> wrote:
> >> > I have used a Fluke 620 for 8 years and works great for what your
> >> > needs are, look on ebay also.
> >>
> >> Definitely can't afford a new one.
> >> Might be able to afford a used one on ebay.
> >>
>
> Hmm.  The more I look at it, the more I think it's worth it.
>
> >> Looking at the specs.  How do they do that?  I can see some of it.
> >> But, without something connected at the far end, how do they tell
> >> there isn't an open circuit at the connector on the far end of the
> >> cable?
> >
> > http://en.wikipedia.org/wiki/Time_domain_reflectometry
> >
> > and
> >
> > http://en.wikipedia.org/wiki/Time-domain_reflectometer
> >
> > Not exactly sure what improvements have been made over the years, but
> > in the late '90s we would send PCBs to get 'TDR' tested to measure the
> > impedance of certain copper traces that carried either high frequency
> > signals or were part of differential circuits. Same principles apply.
> >
>
> That's what I was thinking in general, but had no idea the resolution was
> good
> enough to see that the connector is wired correctly.  Especially,
> without needing
> to plug in some kind of terminator.  I thought it was just good enough
> to see how
> far down the cable the faults are.
>
> It almost sounds like it has too be able to detect the color of the
> insulation, and
> sense pin numbers for some of its tests.
>
> There's definitely more here than I understand.
>
> I need to go download a manual and get a better idea idea about exactly
> what it can and cannot do.
>
> --
> Drew Einhorn
>
> --
> ubuntu-users mailing list
> ubuntu-users at lists.ubuntu.com
> Modify settings or unsubscribe at:
> https://lists.ubuntu.com/mailman/listinfo/ubuntu-users
>



--
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/ubuntu-users/attachments/20090924/9ccf118e/attachment.html>