As you probably know, cable length restrictions are about timing
tolerances and Ethernet protocol efficiency / error detection. I do
believe that there is quite a bit of robustness built into Ethernet and
that the tolerances likely have a good degree of safety factor; but I
don't think you can use simple testing to make a very strong conclusions
that it "works correctly". Yes it probably "kinda, mostly works"; but it
may degrade performance or cause intermittent problems that are harder
to detect (e.g. high packet corruption rates, lower transmission rates,
etc due to problems with collision detection and such). These issues
might not matter much if performance isn't an issue - but I wouldn't
want to have to worry about the what-if when things don't go quite
right.

I'd personally stick with the specs and use switches, etc appropriately
to solve distance issues.

-Jeff


-- 
jdoering
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