Rusty Carruth wrote:
>
> Second, DO NOT BUY APC! ESPECIALLY DO NOT BUY a BackUps! But I'd
> say just avoid them. (Sorry for yelling, but their supposedly
> RS232-C 'signaling' scheme is not RS232 compliant, and if your
> serial port requires valid RS232 signal levels you wont' be able
> to detect low battery (as it only goes to zero VOLTS - some (most?)
> pc hardware is really sloppy and will take a zero volt as a valid
> level, but that's not according to spec - and some hardware (like,
> say, Sun) actually meets spec and will NOT see LB from the UPS
> without a fair amount of hassle. why do I say all this, and
> where do I get my knowledge? I'm trying to get 4 stupid APC
> BackUPS' to work with our Sun Ultra5s - and if there was any
> way I could SEND THE RETARDED THINGS back and get something
> else I would do it in a nanosecond!)
Not sure if this will help; but since I have several APC UPS which I haven't
setup to monitor (will do when I move my office) I did a quick search for RS232
1488 chips and came across this link:
http://www.kpumis.gdansk.tpnet.pl/etrad/upsd.htm
HTH,
Pierre
