Openreach analogue and ISDN switch off 2025.

We’re moving all our customers from the old analogue public switched telephone network (PSTN) to a fully digital network. We’ve already started. We plan to have moved everyone over before Openreach stop the PSTN (and ISDN) service in 2025.

Everyone’s switching.

Yes, we mean everyone. Business and home including alarms, EPOS machines, door entry systems and CCTV will be affected.

Sounds Drastic Why Change?

It’s now time to update the UK network with cables in the ground since the 19th century and embrace a digital network.

IS IP Better than ISDN & PSTN?

Yes everyone demands much more today from technology as people switch to mobile and internet communications at lower costs.

Why Upgrade Before 2025?

You need to start planning today it’s not just about calls it’s everything you have connected to your phone lines that will change.

What you need to know

Landline replacement.

Prepare for the PSTN switch off

BT Openreach has announced it intends to switch off the traditional, copper-based telephone network in 2025. This is commonly referred to as the PSTN Switch Off.

While 2025 may seem a while away, from December 2023 you won’t be able to purchase any new ISDN or PSTN-based services, with many locations affected by a stop sell much sooner than that.

BT Openreach PSTN Switch Off
PSTN switch off and landline replacement timeline
November 2017
Announcement is made.

BT Openreach announces its intention to switch off the PSTN in 2025.

December 2020
Salisbury stop sell.

Customers In Salisbury cannot purchase new ISDN lines or add new features.

October 2021
169 exchanges stop sell.

Customers across 169 locations cannot purchase new ISDN lines or add new features.

December 2022
Salisbury end of life.

The PSTN network is completely switched off in Salisbury.

September 2023
UK stop sell.

Customers across the whole country cannot purchase new ISDN lines or add new features.

December 2025
Deadline UK end of life.

The PSTN network is completely switched off across the UK.

Get ahead of the curve and migrate to cloud today

The PSTN Switch Off will affect all businesses currently operating using PSTN and ISDN services. If you fall into this category, you will need to move to the new network to keep your phone and your number working.

The All IP network delivers voice calls using the same infrastructure as data and using VoIP (Voice over Internet Protocol) technology.

Openreach ISDN Switch Off 2025
Power up your business and lower your costs

Simply put, VoIP uses a company’s existing internet connection to transmit voice calls. When it was first introduced, this solution seemed like a dangerous choice, as it completely relies on the quality of the internet connection to guarantee stable calls.

It is delivered by Over the top (OTT) applications to which new features are added regularly, it gives your business more flexibility and it can be used on a variety of devices – from desk phones to mobiles, tablets, and computers.

Nowadays, the speed of most broadband is fast enough to negate any problems around call quality. VoIP telephony is a simpler option than it sounds, requiring a lot less hardware than legacy systems.

Openreach ISDN Switch Off 2025
Take note and get prepared for the PSTN switch off

The migration will also impact services like security and fire alarms, telecare devices, retail payment terminals and equipment for monitoring and controlling networks.

BT have made their testing facility available to manufacturers and despite the pandemic and lock-downs, there is already a list of who has tested their equipment on the new All IP network which can be found here:

These rely on some features of the PSTN that are not fully replicated in VoIP-based platforms and could have implications for both domestic and business customers, as well as public sector users.

BT who's tested external link
Openreach ISDN Switch Off 2025
We support clients worldwide in every industry

VoIP is a much better alternative to traditional landlines, and it will be the industry standard for years to come. This technology offers many opportunities and benefits for your business.

Lower costs.

VoIP solutions are software-based, which means you don’t need any infrastructure, upfront costs, or additional hardware.

Greater scalability.

Internet-based solutions can be easily scaled up or down depending on your needs. For seasonal businesses, adding more lines for peak season can be quick and easy.

Increased productivity.

VoIP solutions can include many more features than your legacy landline, so that you can handle calls more efficiently and your business can be more productive.


VoIP solutions can be accessed from a variety of devices, which means you won’t be tied to a desk phone anymore and you’ll be able to take your calls wherever you are.

Service continuity.

Moving to VoIP is a seamless process that won’t leave you without your business phone for days. Acting now, before there is a huge demand for these services, is advised to ensure a swift and easy deployment.

Keeping your number.

With VoIP, you don’t have to worry about taking out a new number. You can keep your existing one and ensure your customers can always reach you.

Ease of use.

VoIP solutions are easy to use and can be deployed on a variety of devices, from your existing desk phone to your mobile phone, desktop or tablet.

Call quality.

The speed of broadband is now genuinely fast enough to negate any problems around quality. There are hundreds of thousands of businesses that rely solely on VoIP to deliver their business voice calls.

2025 that’s years away, why are we talking about this now?

Many businesses have already started to move their communications to the cloud, embracing an all-digital platform of making calls over the internet and video conferencing. Salisbury and Mildenhall local exchanges have started withdrawing standard PSTN services, with more exchanges expected to follow soon.

We're nice, book a slot & have a chat

Simple landline replacement recipe.

Dash of preparation, spinkle of great connectivity and a fresh internet-based phone system for the perfect telephony solution.

Explore PhoneLine+

No frills, no fuss guide to phone systems.

It’s a fact landlines are out and Voice over IP is in. So exactly what future proof technology does my business need?

Micro guide to phone systems

SoGEA fast broadband no number.

Finally, business broadband that does not require you to pay for a separate line and number and delivers up to 80Mbps.

Explore SoGEA broadband

Get a better business mobile deal.

We can disrupt the mobile business market together with low-cost unlimited calls, texts and data plans designed for business.

Explore unlimited deals

Unified communications built for today’s modern business.

Embrace the future of telephony by replacing your landline with VoiP before the Public Switch Telephone Network (PSTN) is switched off in 2025.

Business phone systems

Are you ready? explore how we help businesses get ahead.

Business cloud phone systems for SME and large business.

Explore how to make your teams more productive with a cloud phone system designed for the modern workplace.

Cloud Business Communications
Explore cloud business phone systems

PSTN switch off, everything you need to know to power ahead.

This article tells you everything you need to know and how to get prepared and what you need to do.

Five Steps to Business Cloud Migration
Read our 5 steps to cloud migration
Future Proof

SoGEA business broadband.

Explore SoGEA broadband

Fast full fibre broadband.

Explore full fibre broadband

Reduce your business costs.

Offering all the cost benefits of a cloud-based IP solution plus plans with unlimited calls, call recording and auto attendant.

Explore line & call options.

Don’t let your business be disrupted by the ISDN switch off. Choose from our range of business lines and call services.

Explore our connectivity options

Explore SME solutions.

Whether you need connectivity for your start-up or you’re established business, we can help you get things moving fast.

Explore solutions for SMEs

Explore push to talk for teams.

Turn your smartphones, tablets and desktop devices into effective walkie-talkies with our next-generation group communications platform.

Explore Airacom push-to-talk

We can help you with the migration to cloud by calling 0330 175 8374

Contact us