On Thu, 2007-03-08 at 22:02 -0600, Mike McCarty wrote: > I have a UPS which has faithfully served me for a couple of years, > but which I have never tried to control until today. I installed > the Linux software which was downloadable from the website, but > am not satisfied with the level of control afforded me. Essentially, > the software can log an event, play back the log, and wait > some specified period of time (30 sec. default) before initiating > a shutdown. > > What I would like to have happen is this: > > When the power fails, a timer is started, and I get notified, > preferably by a wall and an e-mail. > > If the power resumes before the timer expires, then the timer > is aborted, and I get notified, as above. > > If the timer expires, or the UPS indicates that the battery is > getting low, then I get notified as above, and the machine does a > "suspend to disc" followed by power down. > > Upon power resumption, the machine does a "resume from disc" > if a "suspend to disc" is found. If no "suspend to disc" is > found, then a normal boot ensues. > > The information supplied with the UPS is MS-centric, but should > be adequate to ascertain what needs to be done. First, the > software can find the UPS via a straight-through 9 pin serial cable. > I have verified this, though I uninstalled their software. They > do claim that a "special" cable is needed. I note that not all > functions work with a straight-through cable, so perhaps they > are using the funky TxD on Pin 1. But it can notice that the > UPS is On Battery at least. > > Second, the UPS can be used with MS using the UPS manufacturer's > "special" software, or the "standard MS setup". The MS setup specifies: > > Power Fail/On Battery: Negative > Low Battery: Negative > Remote UPS Shutdown: Positive > > I suppose that this means that Power Fail, Low Battery, > and Shutdown are indicated/controlled by some of the modem > control signals, like DCD, DSR, and DTR, but I don't know what > the associations are, nor how to make something respond > to changes on those lines and take appropriate action. > My guess is Power Fail /DCD, Low Battery /DSR, and > Remote Shutdown DTR. > > Third, I have a desktop, not a laptop, and so I wonder > whether suspend to disc can be done with my machine. > I use FC2 which I realize is not supported, but I suspect > that this aspect of behavior has not changed significantly > in recent times. > > Is it likely that I need a special (APC compatible) cable? > > Would someone please help me to configure my machine? ---- APC - you really need to use an APC cable are you using apc's software or apcupsd? (I heavily recommend apcupsd for apc brand units, but again, you always should use the cable that comes with the unit) Craig
