Re: -5v and -12v Serial Ports

On Sat, 02 Jun 2007 16:09:48 -0700, Don Bowey <dbowey@xxxxxxxxxxx>
wrote:

On 6/2/07 12:47 AM, in article ui6263lhdf814o1q3oo3anp9n3mf44u0vp@xxxxxxx,
"Jonathan Kirwan" <jkirwan@xxxxxxxxxxxxxx> wrote:

(snip)
(3) Signals are MARK, "1", when the cable pin voltage is < -3V and
SPACE, "0", when the cable pin voltage is > +3V and everything else in
between is "not defined."

(snip)

Jon


Jon

I found a few interesting things:

1. You had already posted, correctly) the polarities. (my senior moment).

Thanks! I was starting to wonder about me.

2. A copy of ANSI EIA 232-D, which I thought I had tossed. (another s.m.)

I don't have the actual spec, itself. So I'm interested.

3. An assortment of other Standards and USW Technical Publications.
(I think my ego got in the way of dumping some of these)

Do you want any? I won't toss them until I hear from you.

I think I might. You can write to me at the email address that goes
out with my posts, if you want to let me know what else there may be
or otherwise work out details.

Thanks for considering the idea,
Jon
.

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