How to run hundreds of phones while being struck by suicide drones
Problem
In Ukraine suicide drones strike critical infrastructure regularly.
Some outages are caused directly by the attacks - destroyed power plants, substations, transformers, power lines, some are scheduled in advance - power grid wasn’t designed to work while some of its power plants and transformers are destroyed and are under repair.
Cold season doesn’t help with outages either, load is increased greatly because people stay home longer, use electric heating which is just pure energy → heat transformer and it’s very consuming.
There even was an official program to replace your old lightbulb for a new LED one for free which is beneficial for both parties. Neat.
Solution
General necessities such as water pumps in apartment buildings, elevators and corridor lights are sometimes backed up if people voted to spend money on a local generator in the building.
Nowadays, on the fourth year of shutdowns, almost every internet provider has implemented some sort of a solution, either batteries for RJ45/copper connections (~12 hours of uptime) or FTTH (Fiber to the Home) which can work even longer, 1-2 days, because with this technology one central node can service thousands of apartments over passive fiber without the need for intermediate switches.
Small businesses often use generators to stay open during an outage, so it gets very noisy during shutdowns.
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