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2027 BT Switch Off – PSTN and ISDN

2027 BT Switch Off – Get Switched On
The 2027 BT Switch Off is approaching, is your organisation prepared?

As the 2027 BT Switch Off approaches, the UK is preparing for a significant technological change. Tel Group is here to help your school or business navigate this transition. 

BT Openreach has announced that by January 2027, the Analogue Public Switched Telephone Network (PSTN) and the Integrated Services Digital Network (ISDN) will be switched off entirely, transitioning to a single Internet Protocol (IP) network.

This means that every phone line in the UK will be required to move to a fully digital network, routing calls over IP rather than traditional lines. 

However, it’s not just your phone services you need to consider. Everything that currently utilises PSTN and ISDN will also become obsolete. This may include your broadband (ADSL and FTTC), alarms, door entry systems, CCTV, faxes, and much more. 

Now is the time to get ahead of the change and upgrade your lines before they become obsolete. Get in touch to obtain a free quotation!

Contact us to get started on upgrading before the 2027 BT Switch Off!



Learn more about how your organisation can prepare for the 2027 BT Switch-Off!


2027 BT Switch Off

Prepare your organisation for the 2027 BT Switch Off with Tel Group!

2027 BT Switch Off- Your  school or businesses traditional lines will be switched off by 2027 - Tel Group 2027 BT Switch Off- Your  school or businesses traditional lines will be switched off by 2027 - Tel Group

What is happening?

BT has started to phase out its ISDN and PSTN lines, with the intention to switch off these lines for good by January 2027.

Essentially, this means that your school or business will be forced to replace these lines and all connected equipment in order to make way for the newer, cheaper, and more efficient alternatives: VoIP and SIP.

VoIP and SIP Telephones to replace Analogue & Digital Lines ahead of the 2027 BT Switch Off - Why is this happening? VoIP and SIP Telephones to replace Analogue & Digital Lines ahead of the 2027 BT Switch Off - Why is this happening?

Why is this happening?

Unfortunately, traditional lines no longer meet the demand for new technology, offering a limited number of benefits. Copper connections, which are widely used in schools, do not meet the DfE standards. 

Additionally, traditional phone lines are made up of old technology, which means maintenance is much more frequent and costly.

The new network will provide a future-proof, reliable service, supporting higher quality voice calls with fewer faults and less maintenance.

2027 BT Switch Off- Your traditional lines will be switched off -Broadband - ADSL and FTTP Telephony - digital and analogue 2027 BT Switch Off- Your traditional lines will be switched off -Broadband - ADSL and FTTP Telephony - digital and analogue

What equipment will be affected?

Not only will your telephone systems be affected, but additional connected equipment will also become obsolete. 

The main thing to consider is your broadband. If your current broadband connection operates using the ADSL or FTTC network, you’ll need to switch your broadband over to FTTP or SoGEA. 

Any additional equipment that also uses PSTN and ISDN will stop working, this may include alarms (lift, fire, intruder alarms), door entry systems, CCTV, faxes, and much more.

The 2027 BT switch off will affect all businesses and schools currently on old lines, upgrade to VoIP or SIP ahead of the switch over. The 2027 BT switch off will affect all businesses and schools currently on old lines, upgrade to VoIP or SIP ahead of the switch over.

Who will the 2027 BT Switch-Off affect?

This new digital network is the biggest upgrade to broadband and telephone lines. Everyone using ISDN or PSTN, regardless of provider, will have their lines switched off. This means your school or business will be directly affected.

You will therefore need to accommodate this change to ensure your operations continue to run smoothly.

Transition to VoIP or SIP from ISDN & PSTN before the 2027 BT Switch Off Transition to VoIP or SIP from ISDN & PSTN before the 2027 BT Switch Off

What telephony options do I have?

When looking to upgrade from your obsolete telephone lines, IP Technology is what you need.

VoIP – Voice over Internet Protocol. 

VoIP is the most popular modern alternative to PSTN lines and allows you to make and receive phone calls over the internet.

SIP – Session Initiation Protocol.

SIP is a highly flexible technology which enables you to send and receive multimedia data e.g. video calls and voice calls.

Transition from ADSL or FTTC to a leased line, FTTP or SoGEA before the 2027 BT Switch Off Transition from ADSL or FTTC to a leased line, FTTP or SoGEA before the 2027 BT Switch Off

What broadband options do I have?

If your broadband connection operates using the ADSL or FTTC network, you’ll need to switch your broadband over to FTTP or SoGEA. 

FTTPFibre to the Premise.

FTTP is a pure fibre connection from the exchange into your premises, offering higher broadband speeds. Full fibre services provide the capacity and speed needed for organisations to run effectively.

SoGEA – Single order Generic Ethernet Access.

SOGEA is a standalone broadband-only product, created after Openreach decided to shut down the ISDN and PSTN network. SoGEA provides the internet connection you require within a single order and without a PSTN line, with lower install and rental costs.

The benefits of upgrading to VoIP before the 2027 BT Switch Off The benefits of upgrading to VoIP before the 2027 BT Switch Off

What are the benefits of upgrading?

Moving away from traditional lines to our newer, futureproof and cost-effective technology brings a number of benefits and widens your capabilities:

  • Reduced Costs
  • Robust Connection
  • High Speeds
  • Remote Working
  • Free Calls Between Sites
  • Keep Existing Numbers
  • Call Recording, Queuing and Auto Attendant
  • Voicemail to Email
  • Integrations
  • & Much More

Don’t just take our word for it!

See what our customers have to say about their experience upgrading ahead of the 2027 BT Switch Off!

  • Ramsden Primary School

    “Strategically, we needed to prepare for the BT switch off and Tel Group ticked all the boxes. They promptly came out and gave us a very reasonable quote which enabled us not only to expand our current telephone network, but also provide a comprehensive lockdown system with CCTV and Speakers.

    I am so pleased we chose Tel Group, their advice was spot on and we now have a futureproof system in place which has also saved us money.”

  • Picker Elliott Estate Agents

    We have used Tel Group for over10 years now and have always had any issues resolve quickly and professionally.

    We recently switched to their VOIP service ahead of the looming 2027 BT Switch Off. The whole process was dealt with very quickly and with little disruption to our business.

    The new system was set up professionally and explained to all staff. Customer service has always been a strong point. 

  • Bottlesford Infant School

    “We would just like to thank you for the fast and professional service we received whilst upgrading from our analogue telephone system ahead of the BT Switch Off!

    Having been a customer for several years the upgrade was seamless and the engineer, Darren, was very efficient, worked hard and answered all our questions.

    We would definitely recommend your company to other establishments.”

  • Monks Abbey Primary School

    “We decided to transfer our telephone systems over to digital from analogue ahead of the BT Switch Off and chose Tel Group as our preferred provider.

    David was extremely helpful in recommending the most cost effective solution. The implementation and installation was also very straightforward.

    The system is working well and I would recommend Tel Group without hesitation.”

  • Bushy Hill Junior School

    “We are delighted with our new phone system, it has been revolutionary for the office team and is saving us money.

    Since implementation, we had one morning with no internet and the telephones continued. The install was speedy with no disruption, and the training provided completely fulfilled our needs.

    My only issue…. was that we did not do this 3 years ago! I couldn’t recommend Tel Group enough.”

  • Ashfield Park Primary School

    “We recently transferred our telephone system to digital from analogue in preparation for the 2027 BT Switch Off.

    The transition was easy and happened almost without us knowing, keeping the same numbers so no disruption.

    Tel Group are knowledgeable, friendly and respond quickly to any issues, they are also transparent in terms of costs. I would recommend them without hesitation.”

  • Lydgate Junior and Infant School

    “We joined a group of schools who all purchased upgraded telephone systems from Tel Group ahead of the BT Switch Off. 

    We found the installation process to be efficient. I have not had to contact customer service on many occasions, but when I have response time has been good.

    I have found Tel Group as a whole to be friendly, with knowledgeable staff and our new telephone system meets our requirements.”

    Enquire ahead of the 2027 BT Switch-Off
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