we are 270km from a city, a single fibre optic link that travels across a fault line. There's lots of PTP airfibre links going in and out of the mountains, but we need something that will work when that fibre is down. an emergency sytem, located at the towers, that can communicate with its other nodes, and elect a boss node when the world is disconnected so that we get more than silence.

This is a software issue, really. some kind of failover routing