>
>
>+/- 12 Volts will guarantee clean operation on long wires in noisy
>environments. It is essential.

Well, it was designed to operate in steel mills and such, but in an office
environment a 0-5V swing will do 9600 at about half a mile error free in
normal telephone wire.

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics