Fibre still go when the powers out?

Like any self respecting geek I have ups's protecting my gear at home, mainly from voltage fluctuations but the battery backup is helpful too sometimes. I've noticed that Voda HFC goes down in a power outage presumably the gear in the cabinets uses too much power to keep going locally.

We have just recently had chorus digging up the street installing fibre - does fibre internet keep going in a localised power outage ie a street or two, or is it the same as HFC in this regard? How is the network designed re power?

Thanks