OT: Network Cable Tester

[NoOp]

On 09/24/2009 05:35 PM, Douglas Pollard wrote:
> Roger Neth Jr wrote:
>> 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 
>> <mailto:drew.einhorn at gmail.com>> wrote:
>>
>>     On Thu, Sep 24, 2009 at 3:44 PM, David Curtis
>>     <dcurtis at uniserve.com <mailto:dcurtis at uniserve.com>> wrote:
>>     > On Thu, 24 Sep 2009 15:04:23 -0600
>>     > drew einhorn <drew.einhorn at gmail.com
>>     <mailto:drew.einhorn at gmail.com>> wrote:
>>     >
>>     >> On Thu, Sep 24, 2009 at 1:37 PM, Roger Neth Jr
>>     <baypos at gmail.com <mailto: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
>>
>>     --
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>>
>>
>>
>> -- 
>>
> My wife has a Dell mini 9  4g hd drive.  Because she downloaded all 
> updates it completely filled the drive.  So we did a reinstall from the 
> Dell CD  and there was less than 600 Mb space left.  So you can get it a 
> little better than  400mb but not a lot.  We may install puppy Linux I 
> think we will have 1.5 G or a little better  space left. We'll see.
>                                                                          
>                                                          Doug
> 

Not snipped on purpose...

Buy her a Fluke 620 instead :-)