Are you prepared for 2025?


UK WLR Stop Sell (WLR Withdrawal) is now in effect

The switch to internet calling is happening globally. If you have a wired connection to BT Openreach, this is disappearing. As technology and customer behaviour changes, phone companies across the world are moving from analogue to VoIP. Countries like Germany, Japan, and Sweden are ahead of us in making the shift. Estonia and The Netherlands are already there and have already switched off their PSTN networks. 

Criterion Systems Ltd is aiming to help businesses embrace the next generation of UK telephony by replacing landline services with VoIP before the UK’s Public Switch Telephone Network (PSTN) is permanently switched off at the end of January 2027.

UK PSTN End of Life (No more analogue services)

UK PSTN End of Life

The PSTN Network is being switched off


The UK has been using a copper wire telephone network since 1876. This is known as the Public Switched Telephone Network (PSTN). It has been the backbone of our home and business communication systems for years, but this traditional analogue network has reached the end of its usable lifespan. In 2027, BT Openreach will be switching off the PSTN Network in order to implement more modern ‘IP Based’ technologies.

Typical services that will be lost include:

  • Standard landline telephones and associated telephone numbers
  • Fax Machines
  • EPOS Machines
  • Alarm Lines
  • Door Entry Systems
  • Broadband (where provided on a PSTN line)
  • ISDN Services

Next generation IP telephony


In layman’s terms, Voice over IP (VoIP) uses an internet connection to transmit voice calls. VoIP services convert your voice into a digital signal that travels over the internet.

VoIP can allow you to make a call directly from a computer, a special VoIP phone, or a traditional phone connected to a special adapter. In addition, wireless “hot spots” in locations such as airports, parks, and cafes allow you to connect to the Internet and may enable you to use VoIP service wirelessly.

2027 is a long way off - Do i need to act now?


You need to start planning today because there could be a lot to do. Criterion Systems Ltd offers a range of solutions to ensure a seamless transition from analogue to digital services. Your business will also be able to benefit from the lower costs that IP telephony can bring.

It is not as expensive as you may think, as in most cases you can keep your existing telephony equipment, or you can be ahead of the curve by implementing one of our digital IP phone systems.

Hosted VoIP Systems

Horizon VoIP systems can save you money and offer you the best in modern communications.

Avaya IP Systems

Avaya IP Office systems are the benchmark of scalable IP telephony.

Analogue-Digital Gateways

Keep your existing analogue devices by simply adding one of our digital gateway devices.

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Get in touch to find out how we can help your business to embrace the next generation of UK telephony.


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