Yes, all true...

simple rule of thumb.

Long Distance, lower your Baud (if you can !!)
and I have sent 232 over all kinds of cables too(RG6 if I had too), as long as the baud is low enough.

if you need to send 232 over long distance and you want reliability try this product.

Digi One SP
[Link: digi.com]

Cheers guys.