> 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. Do some Ethernet devices such as the switch
> have auto pin sensing/selecting ? Why does the PC-laptop connection not
> work (it starts to register, however no packets transfer, and then the
> connection fails).
>
>   Any ideas ?
>
>   Thank you
>   
>    Declan Hughes