Date: Fri, 18 Apr 2003 10:21:09 -0500 (CDT) From: "Doug Poland" <doug@polands.org> To: barbish@a1poweruser.com Cc: questions@freebsd.org Subject: RE: help testing serial port Message-ID: <20862.63.104.35.130.1050679269.squirrel@email.polands.org> In-Reply-To: <MIEPLLIBMLEEABPDBIEGCEAGDLAA.barbish@a1poweruser.com> References: <54733.63.104.35.130.1050676381.squirrel@email.polands.org> <MIEPLLIBMLEEABPDBIEGCEAGDLAA.barbish@a1poweruser.com>
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JoeB said: > Doug said: > > > >I'm trying to hook up an APC SmartUPS to a 16450 serial port on an > >old 80486. The box is running 4.8-STABLE and is otherwise > >up-to-date. > > > >apcupsd is telling me that it cannot communicate with the UPS via > >the serial port. Both the cable and UPS are fine, I can commuicate > >with the UPS with the same cable on another 80486 with a 16550A > >serial port. Also, the apcupsd.conf has been successfully tested > >on another machine. > > > >How can I test the serial port itself to see if it's working? I > >tried cu -s 2400 -e -o -h -l /dev/cuaa0 and said it was connected. > >I exited cu but now cannot attach ( cu: /dev/cuaa0: Line in use ). > >Obviously I don't understand the fundamentals and tools necessary > >to communicate with a serial port. The handbook and list archives > >haven't been much help. > > > >Could someone point me to a FAQ/archive/tutorial on how to debug a > >serial port? > > > > Check the motherboard setup bios and make sure you have the serial > ports active. > Thanks, I'll do that. -- Regards, Doug
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