[nSLUG] Cat5 vs Cat6

Jason Kenney jdkenney at gmail.com
Mon Nov 2 11:18:44 AST 2009


People seriously still use cat5?  Why? Can you even buy it?

If you have a speed issues or link problems on a cat5 cable, you go
buy a $2 cat5e cable, not a $$$ cable tester?


Jason

On Mon, Nov 2, 2009 at 7:57 AM, Jim Haliburton <jim at on-site.ns.ca> wrote:
> There was some discussion about Cat5e vs Cat6 for Gigabit.  Gigabit was
> designed to run on Cat5  It does not require Cat5e or Cat6.  If you have a
> speed issue there is a lot more than the cable that is an issue.
>
> Probably the most reliable way to determine the problem is to have the cable
> tested with a cable tester, not the program from a NIC vendor.
>
> Using a meter such as a Fluke DSP 100 or better will determine the quality of
> the connection.
>
> Getting a link light or auto negotiation is not an indication of connection
> quality.
>
> A simple test to see if the wiring is at fault is to make a transfer test.
> Then lock the card in 10 not 100 mbit.  Run the test again.  If the cable is
> the problem then the speed at 10 may be faster.
>
> The likley fault of the cable is poor or incorrect termination, not the wire.
> Gigabit runs just fine on Cat5 that is properly installed and terminated.
>
> The 2nd biggest cause of poor speed is the patch cord from the wall plate to
> the PC.  Gert a new 8 conductor patch cord.  Try it.
>
> Often time Aliant (sic) would supply 4 conductor patch cords with their DSL
> modems.  They work for the miserable speeds they deliver, but not for a gigabit
> network.
>
> Gigabit requires all 4 pairs to work properly.  10 and 100 does not.
>
> I have a Fluke DSP 100 and termination tools as part of my work, and that is my
> experience.
>
> Jim H
>
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