Subject: Re: /dev/ttyXX for first serial port on NetBSD?
To: Thomas Bieg <>
From: Steven M. Bellovin <>
List: netbsd-users
Date: 04/27/2007 12:47:16
On Fri, 27 Apr 2007 17:51:43 +0200
Thomas Bieg <> wrote:

> 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.
For what it's worth, with 4.0beta2 and later I'm very happy with the
USB support in apcupsd, once I built the proper custom kernel. 

		--Steve Bellovin,