Most, if not all, tower sites have some sort of backup power now, the question is how long do you want them to run unattended? Most companies figure on 3-4 hours of generator power, plenty of time to dispatch a tech with a gas can, if necessary. The tower sites in cities are usually connected to natural gas, so theoretically could run forever, unless the gas lines are cut (granted, could happen in an earthquake, for example).
The bigger issues are when fiber optic lines are cut, the communication shack is flooded, or the system is just plain overloaded. Backup power is fairly well understood and the government should find better things to do.
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Most, if not all, tower sites have some sort of backup power now, the question is how long do you want them to run unattended? Most companies figure on 3-4 hours of generator power, plenty of time to dispatch a tech with a gas can, if necessary. The tower sites in cities are usually connected to natural gas, so theoretically could run forever, unless the gas lines are cut (granted, could happen in an earthquake, for example).
The bigger issues are when fiber optic lines are cut, the communication shack is flooded, or the system is just plain overloaded. Backup power is fairly well understood and the government should find better things to do.