Don't Let Your Business Lines Go Dead in 2027
85% of UK businesses haven't started migrating yet. Get your free readiness assessment and personalised migration plan before it's too late.
What is the 2027 PSTN switch-off?
The PSTN switch-off is the UK's planned discontinuation of the traditional analogue phone network by January 2027. All businesses using landlines, ISDN, or copper-based broadband must migrate to digital alternatives like VoIP, SIP trunking, or fibre broadband.
What's Happening in 2027?
Key milestones in the UK's transition to digital communications
Stop Sell begins
Openreach stops selling new PSTN-based products in many exchange areas.
Migration acceleration
Businesses encouraged to migrate to digital alternatives before the deadline.
PSTN Switch-Off
Traditional landlines and ISDN services permanently discontinued.
What's Affected in Your Business?
Check which services and devices you need to review before 2027
Phone Lines
Traditional landlines and ISDN connections will stop working.
Broadband
Services using copper phone lines need upgrading to fibre or SoGEA.
Critical Devices
Alarms, EPOS, lifts, and fax machines may need replacement or adapters.
Choose Your Migration Path
Three proven routes to digital communications, tailored to your needs
Not Sure Which Solution Fits?
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Does your business use Microsoft 365 (Teams, Outlook)?
Your 4-Step Migration Journey
A smooth transition with expert guidance at every stage
Assess
Take our readiness quiz to understand your current setup and what needs to change.
Plan
Work with our experts to design the right solution for your business.
Implement
We handle the technical migration with minimal disruption to your operations.
Support
Ongoing support and training to ensure you get the most from your new system.
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Understanding the PSTN Switch-Off
Everything UK businesses need to know about the biggest telecoms change in decades
The Public Switched Telephone Network (PSTN) has been the backbone of UK telecommunications since the 1800s. Built on copper wiring, it carries traditional analogue voice calls and supports ISDN lines used by thousands of businesses for phone systems, fax machines, alarm systems, and payment terminals. Openreach, the infrastructure arm of BT, has confirmed that the entire PSTN network will be permanently decommissioned by January 2027.
This means every business still relying on analogue phone lines, ISDN2, ISDN30, or copper-based broadband (ADSL) must migrate to an IP-based alternative. The switch-off is not optional — Openreach has already begun the "stop sell" phase, preventing new PSTN orders in hundreds of exchange areas across England, Scotland, Wales, and Northern Ireland.
Who is affected?
Any organisation using traditional landlines, ISDN voice channels, analogue alarm lines, lift emergency phones, EPOS terminals on phone lines, or fax machines connected to the PSTN will need to act. This includes offices, retail premises, warehouses, care homes, schools, GP surgeries, and multi-site enterprises. Even businesses that have already moved to VoIP for voice calls may still have legacy analogue lines powering door entry systems, franking machines, or building management systems.
What are the alternatives?
Businesses have three primary migration paths. Cloud Communications (SelectVoice) replaces your entire phone system with a modern, AI-powered platform hosted in the cloud — ideal for businesses wanting a fresh start with features like voicemail-to-text, call recording, and sentiment analysis. SIP Trunking lets you keep your existing on-premise PBX hardware but connects it to the digital network via internet-based voice channels. Teams Direct Routing adds full PSTN calling to Microsoft Teams, perfect for organisations already invested in Microsoft 365.
What about broadband?
Copper-based ADSL broadband also relies on the PSTN and will cease. Replacement options include SoGEA (Single Order Generic Ethernet Access), which delivers broadband without a phone line, FTTP (Fibre to the Premises) offering gigabit speeds, and Ethernet leased lines for businesses needing guaranteed bandwidth and uptime. Telappliant can survey your premises and recommend the most cost-effective connectivity upgrade for your location.