I have a one cabinet Magix going in soon and need some help sizing a UPS. I only need a safe KW or KVA estimate and I can size batteries from there to get UPS run time. I really only want to eliminate the outages up to a few minutes, maybe 5.

Cabinet will be equipped for 8 incoming POTS lines, T1 card, 16 digital stations, 16 analog stations, and Avaya Messaging R4.0 - 4 port.

Looks like a couple of ways to config this and use 5 slots either way. 2 each 4X12, 1 each 0x16, T1 card and R4 messaging or...1 each 800GSLS, 1 each 0x24, 1 each 0x16, T1 card and R4 messaging.

I was told the size should be 2KVA but that seems a little on the large size (my guesstimate only).

I don't have the equipment yet so don't have the manuals.

Will someone give me their recommendation please?

About me by the way, I started with South Central Bell in '79 in Ky, was forced to LA, got booted in '83 with about 100 other guys. Worked for an interconnect for couple of years, came back home to TN and had my own company for 15 years and now the Telecom Mgr for a large company. Love phones, don't like what's happened to the industry...pet peeve...coiled handset cords..hard for me to walk past one. Thanks, Dennis