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Openreach Stops Selling New UK Analogue Copper Phone Lines
(www.ispreview.co.uk)
This is a most excellent place for technology news and articles.
I believe a lot of analog phones now transfer to VoIP at the cabinet. Those cabinets don't have a UPS in them. A friend of mine (naively) thought putting his ASDL modem on a UPS would keep his internet working during a power cut. His side worked, unfortunately the street box went dark, till the power came back up.
Even an analog phone will now fall over in a power cut.