Would it not depend on what you are connecting to. For example from a switch port to
another switch port both the ports would be the same signalling therefore a cross-over
would be required. From a switch to a router the ports a different a straight cable
should do fine.
What we a trying to achieve is a transmit wire connecting to a recieve. If this does
not occur in the ports then we must do it in the cable (cross-over cable). A transmit
must connect to a receive for a circuit to work.
Lets say from a switch pins 1 RD+; 2 RD-; 3 TD+; 6 TD-
Pins 4, 5, 7 & 8 are not used in ethernet.
If they were connecting to another switch we would need a crossover to have pin 1 RD+
connecting to 3 TD+
In a router or PC the connetions are 1 TD+; 2 TD-; 3 RD+; 6RD-
A straigh cable would connect pin 1 (switch) RD+ to pin 1 (adaptor) TD+ and so on.
A long winded Teunis explanation but this I hope helps.
Teunis
Hobart, Tasmania
Australia
On Wednesday, December 27, 2000 at 07:54:12 PM, sean wrote:
> Hi,
>
> I am just wondering... does trunking use crossover or straight cable?
>
> Thanks
>
>
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