The advantage of a UPS
1. Surge protector
2. Backup Power Supply if during power outage.
a. Ooma Hub 15W
b. Cable modem 12W
c. Router 8W
edit: The APC web site indicates a 20 min run time with a 35W load for this UPS model.
Internet: Charter ISP 10Mbs/1Mbs
Port request: 2/21/2010
Port completed: 3/9/2010
The voltage protection rating is also important. The lower the better. Unfortunately, that Belkin supressor is rated at 400v. I've seen others that protect for any surges above 330v.
Currently on UPS are cable modem, router, and ooma telo (in the basement). It has both coaxial and RG11/RG45 protection. I have the cable line going into the 850 before feeding the modem, and also the phone line from telo going to the 850 before feeding into the house wiring.
The spec. says estimate running time is 1min. at full load, and 7min. at haft load. In my situation, it said (the LCD) ERT is 91min. I'll be very happy if it last haft of that 91min.
Remember we take a calculated rist with voip, no internet -> no phone. So extra juice for the modem and telo will help when the power is down due to increment weater. You'll be appreciated that.
Its rated for 600joules but its voltage capacity is at 300v so I will have to buy another one.
I will also investigate getting a UPS.