Lpc2000

> > >
> Considering that in one installation, the customer didn't bother to
read 
> the manual and hooked up a long distance RS485 circuit: 14miles @ 1200 
> baud!  We were very surprised that our equipment was working at that 
> distance.  Normally, we would limit at somewhere near 5..7 miles.
> 

At 1200 baud the wavelength of the 7th harmonic is 36Km, so 14 miles
is by no means critical from a transmission line POV.

Of course STP with a good conducter section is required, and at least
one side should be insulated if you are not going to have earthing
problems, especially in thunderstorms!