We have a Toshiba Strata CHSUB112A2 here at work. It has always been trouble free. Once, our phones all went dead and I found it was a problem with the UPS that it is plugged into not the phone system itself. We had a power outage yesterday and when I came in today, the phones were all dead. But to my dismay, the UPS is still on and both of the lights on the Strata are lit. Is there some type of fuse or circuit breaker that I might be able to locate? Or, is this a problem for a professional?