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The clock is ticking. By January 2027, the UK’s PSTN (Public Switched Telephone Network) and ISDN (Integrated Services Digital Network) will be permanently shut down.
That might sound like a long way off — but in the world of business technology, two years can disappear in the blink of an eye. If your organisation is still using traditional phone lines, now is the time to prepare. Waiting too long risks disruption, rushed decisions, and unnecessary costs.
What does the switch-off mean?
BT Openreach is decommissioning the country’s ageing analogue phone infrastructure. This means:
- Landline-based phone systems will stop working
- Fax machines, older broadband services, and alarms using these lines may also be affected
- Businesses will need to upgrade to internet-based solutions
What are the alternatives?
To stay connected, your business will need to switch to modern digital telephony, such as:
🟣 VoIP (Voice over Internet Protocol) – Make and receive calls over the internet, with better sound quality, flexibility, and scalability.
🟣SIP Trunks – A cost-effective option that works with existing phone systems and enables you to retain familiar hardware.
🟣 Cloud-Based Phone Systems – Full-featured, mobile-ready systems that empower hybrid working and customer responsiveness.
Why you shouldn’t wait
While 2027 may seem distant, businesses that wait too long risk:
- Limited support or supply chain delays as the deadline nears
- Increased costs from emergency upgrades
- Disruption to communications and operations
Migrating your phone system isn’t just a compliance task — it’s an opportunity to improve how your team connects, collaborates, and serves customers.
How Onezo can help
At Onezo, we work with businesses to design and deliver tailored telephony solutions that are secure, scalable, and future-ready. We handle the entire transition, from audit to implementation, so you can make the switch with zero downtime and full confidence.
The switch-off is coming — but the solution starts today.
Don’t let your business fall behind. Contact Onezo and get ahead of the 2027 deadline.