Prepare for the 2025 PTSN Switch off deadline in the United Kingdom

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Switch to a VoIP-powered phone system and lines to avoid interruptions & downtime

The clock is ticking. By 2025, BT’s PSTN network will switch off, marking the end of traditional landline services in the UK. The Ofcom-backed PSTN switch-off might seem a little daunting, but we’re here to ensure your transition is seamless and worry-free.

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PSTN Switch-off deadline countdown**


** While the PSTN switch-off deadline ends in 2025, in many regions around the United Kingdom customers have already migrated to fully digital networks and future-proof phone systems that rely on fibre or broadband connections.

What Is The PSTN Switch Off?

The Public Switched Telephone Network (PSTN) has been the backbone of the UK’s communication infrastructure for over a century.

However, this outdated technology can’t keep up with the demands of our increasingly digital world.

The PSTN switch-off will result in businesses needing to migrate to internet-based communication solutions.

Submit your enquiry using the contact form to switch to a future-facing phone system today. You can also continue reading about the PSTN switch-off below.

How will the PSTN switch off affect my business’ telecommunications?

The UK PSTN switch-off means that traditional landline services will no longer be operational.

You need to take note that traditional phone services that you’ve relied upon (including BT PSTN and ISDN telephone lines) will be replaced by modern, digital technology.

Regions in the United Kingdom have already made the switch to future-proof VoIP (Voice over Internet Protocol) systems that allow you to make voice calls using broadband services or a fibre network connection instead of a regular phone line.

When switching to a VoIP system, you can retain your current business telephone number, and unlock a range of calling features that enhance productivity and unify workflows, and future-proof company communications at the same time!

Upgrade to a future-proof phone system today

Act now and install a future-proof VoIP phone system before the deadline ends

Install a VoIP phone system to future-proof your communications and ensure uninterrupted service and take advantage of cutting-edge features for managing business communications.

Contact a specialist to discuss your seamless transition to a VoIP phone system.

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A trusted provider of on-premise and cloud-based phone systems for businesses in the United Kingdom

United Telecoms is a provider of reliable and feature-rich on-premise and cloud PBX solutions for business in the United Kingdom.

A specialist from our team can help you find the ideal solution to suit your communication needs

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Examples of future-facing VoIP systems

Cloud hosted PBX

A virtual phone system hosted entirely on servers in off-site data centers. This technology offers flexibility and a range of features without requiring additional hardware including call routing, recording, analytics, integration with CRM systems & more.

Find out if cloud PBX is right for your business

enquire Cloud pbx

SIP Trunking

Connect your premises directly to the Public Telephone Network via broadband, ethernet, or a private circuit. SIP (Session Initiation Protocol) trunk solutions are cost-effective, scalable, and offers advanced call management features.

Find out if a SIP trunk solution is right for your business.


HV Select (Hybrid Voice Select)

 A cutting-edge VoIP-enabled solution replacing traditional PBX. Our cloud-hosted phone systems are scalable, cost-effective, and packed with advanced features, providing unparalleled control over your business communications.

Find out if HV. Select is the right choice for your business.

enquire HV select

Frequently asked questions about the PSTN switch off

The Public Switched Telephone Network (PSTN), sometimes referred to as the ‘Public Switch Telephone Network, is the traditional phone network that uses copper phone lines to carry analogue voice data across long distances. However, the PSTN switch-off, scheduled for 2025, signifies a move to digital voice communications that rely on your internet connection enabled by your broadband service or fibre optic cables, and Voice Over Internet Protocol (VoIP) technology.

No, the PSTN switch-off hasn’t been paused or delayed. This change is part of a UK-wide initiative backed by Ofcom and implemented by BT Openreach to transition to a fully digital network, specifically VoIP phone systems and services, and away from the PSTN and ISDN networks.

The end of traditional landline telephone services in the UK is marked by the PSTN switch-off, set for 2025. This includes all Integrated Services Digital Network (ISDN) lines and services currently in operation.

Analogue PBX systems operate on the PSTN network using traditional copper wiring and telephone lines, whereas digital PBX systems utilise an IP network. This change means phone calls are made over a broadband internet connection and businesses are provided with scalable VoIP services.

There are numerous benefits associated with using a VoIP service, an IP technology-based telephone service. Unlike traditional telephony which relies on a copper telephone line, VoIP operates over the internet. It supports not only voice calls but also video calls, integrating seamlessly into broader internet communications like instant messaging and file sharing.

VoIP is the ideal choice for an ‘all IP future’ when it comes to communications. It provides phone systems that rely on VoIP enhanced flexibility, mobility, and unlocks advanced features that used to require complex installation and costly hardware.

PSTN services, while dependable, can’t match VoIP’s versatility, and it’s important to remember that PSTN-based services are gradually being phased out globally.

This transition to VoIP telephony also leads to significant cost savings, making it an appealing option for UK businesses of all sizes.

Traditional telephony costs can rapidly add up, while VoIP often provides unlimited national calling at a fraction of the cost. This makes VoIP an innovative, cost-effective, and future-proof solution for business communication needs. To ensure you can use your VoIP system effectively, businesses may also need to upgrade from older internet connections, and rely on a high-speed and stable network instead.

Got questions? Contact our experts today.


We service the following locations across London and the United Kingdom

Greater London: City of London, Hounslow, Barking and Dagenham, Islington, Barnet, Kensington and Chelsea, Bexley, Kingston upon Thames, Brent, Lambeth, Bromley, Lewisham, Camden, Merton Croydon, Newham, Ealing, Redbridge, Enfield, Richmond upon Thames, Greenwich, Southwark, Hackney, Sutton, Hammersmith and Fulham, Tower Hamlets, Haringey, Waltham Forest, Harrow, Wandsworth, Havering, Westminster and Hillingdon.

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Tel: 020 3399 8011


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