RE: RS232 over CAT5 pinouts

["Paul Gale" <groups@xxxxxxxxxxxxxxxx>]

http://www.zytrax.com/tech/layer_1/cables/tech_rs232.htm#rj45

How about that - should be what you're after?

Paul.

-----Original Message-----
From: David Chapman [mailto:david@xxxxxxx]
Sent: 16 February 2005 09:59
To: ukha_d@xxxxxxx
Subject: [ukha_d] RS232 over CAT5 pinouts


I plan to move my APC UPS in to the garage but still want to monitor it via
RS232. Using DB9 to RJ45 modular adaptors I can make this work over CAT5
but
am unsure of pinouts. I know I could just connect pins 1 through 8 of the
RJ45 to pins 1 through 8 of the 9 pin D (no connection on pin 9) and as
long
as it is the same both ends it would work - but it needs to go via a patch
panel and I know there is a pinout scheme whereby if the RS232 was plugged
into a hub it would cause no damage - I think the trick is to make sure
that
the RS232 pins that carry voltage are mapped to pins that are unused by the
hub - anyone know what this pinout scheme is, I haven't been able to
Googlefind it.

David C