Ethernet Connection Works With/Without Crossover Coupler ?

29 Aug 2006 6:14 AM

abcdhughes@iol.ie

Hello,

I have a Cat.5e Ethernet crossover coupler, pins 1-3 connected, pins
2-6 connected, however my PC to 4 port switch connection works whether
or not I insert the coupler with an extra straight through cable. I
have verified coupler and cable wiring with a continuity tester. The
situation also applies for my laptop. I am however unable to get a PC
to laptop connection working using two straight throught Cat.5e cables
and the crossover coupler.

Any ideas ?

Thank you

Declan Hughes

29 Aug 2006 7:32 AM

Steve Winograd [MVP]

In article <1156832071.890628.241***@p79g2000cwp.googlegroups.com>,
Show quoteHide quote

"abcdhug***@iol.ie" <abcdhug***@iol.ie> wrote:
> Hello,
>
> I have a Cat.5e Ethernet crossover coupler, pins 1-3 connected, pins
>2-6 connected, however my PC to 4 port switch connection works whether
>or not I insert the coupler with an extra straight through cable. I
>have verified coupler and cable wiring with a continuity tester. The
>situation also applies for my laptop. I am however unable to get a PC
>to laptop connection working using two straight throught Cat.5e cables
>and the crossover coupler.
>
> Any ideas ?
>
> Thank you
>
> Declan Hughes

Many recent network switches automatically sense what type of
connection each port has and can handle both straight and crossed
connections. For example, Netgear calls that capability "Auto
Uplink", as described here:

http://www.netgear.com/Products/Switches/DesktopSwitches/FS608.aspx

The Ethernet adapters on your computers can't do automatic connection
type sensing.

--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

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