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Broadband network resilience to rota disconnection

With a real risk of rota disconnection this winter, I have been looking into UPS and home battery backup solutions (which would also enable me to utilise off-peak tariffs). However, I have been unable to find out whether the broadband distribution cabinets in the road have a priority mains supply which would not be affected by rota cuts. There is no point in providing backup power for computers and routers if the broadband network shuts down. I asked an openreach technician and he didn't know. Can anyone give an authoritative answer?
Since FTP services remove the old analogue phone lines - and hence the ability to make emergency phone calls - I'm assuming a high level of resilience. But FTP subscribers would need mains power to their handsets in such a case, so maybe it's assumed that we will use mobile phones in any emergency during a blackout.
Parents
  • There is a discussion here: https://community.bt.com/t5/Home-phone-including-Digital/Mains-power-cuts-and-DigitalVoice/td-p/2217183

    Interestingly, there is a suggestion that lack of power at the street cabinet, while a problem for FTTC (Fibre To The Cabinet) , might not be either for analogue phone lines (line power is passed through passively from the exchange) , nor with FTTP (Fibre To The Premises) - as the optics again run straight through to the exchange (I'm not sure if that's true or whether the cabinet still has some reshaping/amplification role). Seemingly the cabinets have battery backup which should last for at least 4 hours - after than the batteries may be replaced (but perhaps unlikely if the outage is widespread).

      - Andy.

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  • There is a discussion here: https://community.bt.com/t5/Home-phone-including-Digital/Mains-power-cuts-and-DigitalVoice/td-p/2217183

    Interestingly, there is a suggestion that lack of power at the street cabinet, while a problem for FTTC (Fibre To The Cabinet) , might not be either for analogue phone lines (line power is passed through passively from the exchange) , nor with FTTP (Fibre To The Premises) - as the optics again run straight through to the exchange (I'm not sure if that's true or whether the cabinet still has some reshaping/amplification role). Seemingly the cabinets have battery backup which should last for at least 4 hours - after than the batteries may be replaced (but perhaps unlikely if the outage is widespread).

      - Andy.

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