Just go -48vdc. None of these pesky UPS problems :)
Unfortunately there's a serious lack of PoE switches that are -48. On Nov 13, 2012 8:51 PM, "Jeff Kell" <jeff-k...@utc.edu> wrote: > On 11/13/2012 6:42 PM, Tom Morris wrote: > > Sorry to say, I've used them and had them eat themselves. They just > > die mysteriously and let out lots of smoke when they do. When they do, > > however, they leave behind a perfectly good set of batteries. I'd > > recommend looking elsewhere... Does Eaton/PowerWare still make the > > FerrUPS series? Those were *solid*. > > Interesting. So far the feedback sounds overwhelmingly negative. Heard > some good points on Emerson (I'm assuming Liebert?). We've had much > better luck overall with them, although a couple of incidents where they > don't care to come back online after they were drained. > > We largely use the UPS to survive power glitches without dropping the > network for switch reboot times, we're not after long runs. As such, > the occasional extended outages drain the UPS'es and there are always > the percentage of them that do not come back online and require manual > intervention. > > We were formerly a big TrippLite user, but they seem to be incredibly > fault-intolerant with regard to the scenario above (coming back online > after draining), and to a lesser degree, going offline after a power > glitch. > > Never used an Eaton that I'm aware of however. > > Would be interested in other recommendations for remote / IDF / MDF > environment UPS systems to just "keep the stack up" over power glitches. > > Jeff > > >