In December 2025, BT will be switching off its Public Switched Telephone Network (PSTN) and Integrated Services Digital Network (ISDN) phone lines in the UK.Further reading: the PSTN switch-off and your business
Nicknamed ‘the big switch off’ it represents a significant change to the telecoms industry, but also an opportunity for UK businesses for several reasons:
1. Modernisation
The PSTN and ISDN networks are old technologies that have been around for many decades. By switching them off, BT is encouraging businesses to adopt more advanced and modern communication solutions. This opens up new possibilities for you to upgrade your systems if required and take advantage of more efficient and feature-rich communication technologies.2. Cost savings
The switch off presents an opportunity for businesses to reduce communication costs. Traditional telephone networks like PSTN and ISDN can be expensive to maintain and operate. By transitioning to newer alternatives, such as internet-based Voice over IP (VoIP) or cloud-based telephony, you can often benefit from cost savings in terms of hardware, maintenance, and call charges.3. Flexibility and scalability
Newer communication technologies provide businesses with greater flexibility and scalability. VoIP, for example, allows you to make calls over the internet, providing more flexibility in terms of device compatibility and mobility and you can easily scale your communication systems up or down based on your needs.4. Advanced features
The switch off creates an opportunity for businesses to access advanced communication features and tools that were not available on the old networks. These features could include video conferencing, virtual phone numbers, call analytics, call routing, and integration with other software systems. Such capabilities can enhance your productivity, streamline workflows, and improve customer interactions.5. Integration and collaboration
Newer communication technologies often integrate seamlessly with other digital tools and platforms, enabling businesses to streamline their operations and enhance collaboration. For example, integrating telephony with customer relationship management (CRM) systems allows you to have a unified view of customer interactions and data.6. Future-proofing
By embracing the switch off and adopting newer communication technologies, businesses can future-proof their operations. You can stay ahead of technological advancements and be better prepared for future developments and by embracing change now, you can gain a competitive edge.Further reading: the benefits of a modern VoIP telephone system
Further reading: VoIP telephone systems – common deployment challenges
It's important for you to plan and prepare well in advance for the big switch off to ensure a smooth transition and to amplify the opportunities modernisation brings.
You need to consider what you will lose due to the switch off and what you need to directly replace. You also need to consider what technology upgrades will enhance your business the most.
For further information or to discuss your own situation please email us or call us on 01625 613 633.
