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Readying your business for the ISDN & PSTN switch-off

The Public Switch Telephone Network (PSTN) will close in December 2025.


By then, every phone line in the UK will have moved to a fully digital network that uses Internet Protocol (IP) across a fibre-based service.


This won’t just affect voice services, it may also mean you need to upgrade your broadband.

Any equipment that currently uses the PSTN will stop working: alarms, EPOS machines, door entry systems, CCTV, faxes, and so on.


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