We have been unsatisfied with the performance of our notification from our ups units. Performance is intermittent at best. What we are looking for is either a software or hardware solution for an alert when power to our computer room goes out. We have ups units that buy us a couple of hours (the room was built without a building generator). We would like to be notified when the power goes out so that we can get in and get the external generator hooked up before we lose battery power. Does any body have any recommendations of what we could put in place?