Wiring terminals 300 ft. from the computer

[Floyd Davidson]

In article <1142 at atti07.ATT.COM> rjw at atti07.ATT.COM (Ralph J. Winslow x7774) writes:
>->What type of wiring would be needed for this?  Would shielded be ...
>-
>-50 feet is supposed to be the max for serial cable, however I've seen runs
>-up to ~500 feet or so with no problems.  Your milage may vary.  4-wire is
>-usually good enuf, with a breakout box you can play with the signals and
>-figure out which ones your box and tubes require.
>
>That's true, but be careful to use twisted pairs if you use 4-wire.
>Actually, use twisted pair(s) whatever wire you use.
>

Pray tell what does using twisted pair wire do on an unbalanced
circuit?  Nothing.  Twisted pair will do wonders for common mode
rejection on balance telephone lines, maybe on RS-422, but nothing
for RS-232.

Floyd