Check the power/load requirements of the cabinet type you have. Make sure the generator is large enough to handle the load. Make sure the generator is properly grounded. I've seen a couple of places use generators for short term/emergency use to power single carrier G3si systems. As an EPN, your going to alarm every time you run out of gas or shut off the generator. If your on maintenance, have Avaya ignor the alarms for the couple of weeks the power is out.