Ofcom has published a statement mandating battery back-up for fibre provided broadband. The Communication Provider must provide at least 1 hour's battery back-up time.
When broadband is provided over copper (using standard ADSL/2/2+) or even when the service is FTTC (fibre-to-the-cabinet) where cabinet to the premises is over copper (using VDSL/2/2+) then the copper pair is powered from the cabinet and even if the premises suffers a power-cut, then line will still be powered and phone calls can still be made.
With FTTP (fibre-to-the-premises) then fibre goes all the way to the customer premise and there is now power. Telephony services are provided over the fibre, so if there's a power-cut to the premise both broadband and telephony services are lost. If the premise end of the fibre has equipment that is battery backed, then at least calls can be made.
Ofcom recognises that FTTP deployments at are an early stage in the UK and will monitor the situation and amend if necessary.
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