Subject: Re: /dev/ttyXX for first serial port on NetBSD?
To: Gilles Gravier <>
From: Thomas Bieg <>
List: netbsd-users
Date: 04/27/2007 17:51:43
Gilles Gravier wrote:
> Now I need to figure out what kind of serial cable APC sent me and talk 
> to my UPS. :)

Please share what you find out. From what you can read there:
it will most probably be a "dumb" signalling cable.

I built the "smart" cable described there myself but it didn't work and
I've read from others with the same UPS model (CS 650) that they also
weren't able to get smart signalling over RS232 working. To me it seems
that APS has removed this (undocumented) ability from the newer models.