Everything your business needs to know — in two short videos.
Two-Part Series
Start with Part 1 to understand what the switch-off means, then watch Part 2 to learn exactly what happens when you migrate.
What the PSTN is, why it's being switched off by January 2027, what replaces your traditional phone line, and what you need if you want to keep your existing system.
Number porting, simultaneous cease and provide, what to expect on migration day, and what else could be affected — alarms, broadband, card terminals and more.
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Get my free migration quote →The UK's traditional copper phone network — the PSTN — is being permanently switched off on 31 January 2027. Every analogue phone line, ISDN2 and ISDN30 circuit stops working on that date, and BT has already stopped selling new connections on all of them. Part 1 explains what is being switched off, why the network is being retired, and which services in your business are affected: phone lines, alarm lines, door entry panels, card machines, fax lines and lift phones all run over the same copper in many premises.
Part 2 walks through the migration itself: how your existing numbers are ported to a new VoIP or hosted service, what happens on migration day, and what simultaneous provide and cease means — your new service goes live and the old line is stopped in a coordinated switch, so you are never left without phones. It also covers the practical points businesses ask about most: broadband requirements, handsets, call quality, and what to check before signing a new agreement.
The full withdrawal date is 31 January 2027. Stop-sell is already in force nationwide, so no new copper phone lines can be ordered anywhere in the UK.
Yes. Business numbers are ported to the replacement service as part of the migration, whether you move to a hosted VoIP system, Microsoft Teams calling, or a SIP service.
Voice moves to the internet: hosted VoIP phone systems for most businesses, delivered over full fibre (FTTP), SoGEA broadband or a leased line depending on size and site.
Ready to plan your migration? Use our PSTN switch-off checklist, read the full switch-off guide, or compare phone systems and get quotes.