If you haven’t heard about the PSTN switch-off yet, now is the time to pay attention. The UK is in the final stretch of one of the most significant telecommunications changes in living memory, and the deadline is inching closer every day.
What Is the PSTN?
The Public Switched Telephone Network, better known as PSTN, has been the backbone of UK telephony for well over a century. Every traditional landline call, fax transmission and dial-up connection has travelled across this copper-wire network. It is what many have grown-up with and are familiar with, but as technology and demands continue to increase it is now time for a change.
What’s Happening and Why?
In the UK, the PSTN is being switched off and replaced with digital alternatives, such as internet-based communication systems like VoIP (Voice over Internet Protocol). The reasons are straightforward: the aging copper network is increasingly expensive to maintain, prone to faults, and cannot support the demands of a modern digital economy. Alarms, lift lines, CCTV, telecare devices and more will shut down once PSTN is withdrawn. Some may already show signs of failure due to declining copper stability, and will be replaced with more reliable VoIP alternatives.
Where Are We Now?
The switchover has been building for years, with a key early milestone already passed. The “Stop Sell” phase has been active since September 2023, preventing the sale of new PSTN-based services. In practice, that means if you’ve tried to get a new traditional phone line in the past couple of years, you’ve already been nudged towards digital alternatives.
By mid February 2026, Openreach’s stop-sell on FTTC and ADSL applies to 1,281 telephone exchanges covering 12.5 million premises, covering 51% of the Openreach FTTP footprint. The final deadline? The UK’s traditional copper phone network will be permanently switched off on 31st January 2027.
What Should You Do?
Whether you’re a homeowner, a business, or responsible for a building, the steps are similar:
- Check what you have. Make a list of every device that connects via a phone line. Not just handsets, but alarms, lifts, payment terminals, intercoms and monitoring systems.
- Talk to your provider. Your telecoms provider should be contacting you about migration. If they haven’t, chase them.
- Don’t assume your alarm is fine. Check with your alarm company that your system is compatible with digital lines. If it isn’t, plan the upgrade now, not in December 2026.
- Think about power resilience. If you or someone you care for relies on a telecare device or personal alarm, make sure there’s a plan for what happens during a power cut once the line goes digital.
- Act now. Leaving planning until the final months of 2026 risks service disruption.
The Opportunity
It’s not all doom and gloom. Transitioning to IP-based services like VoIP and Full Fibre (FTTP) offers faster, more reliable connectivity and lower long-term hardware costs. For businesses, the move to cloud telephony brings flexibility, better call management, and integration with modern tools that a copper line could never offer.
The PSTN has served us well over the years. But January 2027 is when it finally goes dark. The question is simply whether you’ll be ready. Any questions regarding switching to VoIP, please refer to our handy FAQ page or simply get in touch.
