A rough back-of-the-envelope calculation tells me that if Verizon's curbside equipment takes 96 watts, that is, 2 amps at 48V, it'll take a minimum of twenty (20) 70-amp hour 12-volt batteries to keep it running for a week. A 70-amp hour 12-volt lead acid battery is physically about the size of a car battery.
Some phone companies use an outside enclosure with batteries, hydrogen tanks and hydrogen fuel cells. The batteries are for the few minutes until the fuel cells get going. The ones I saw at a trade show could use a number of H2 tanks to provide the required run time.
Don
