PSTN Switch Off – What You Need to Know

What is the PSTN switch off?

The Public Switched Telephone Network (PSTN) has served the UK for many years but is no longer suitable for modern communication needs. To meet the demands of today’s digital world, it is being phased out in favour of a more resilient and future-proof system—fibre. This shift to a full-fibre network is designed to provide faster, more reliable, and cost-effective connectivity.

By 2027, all traditional PSTN lines, including analogue and digital phone lines, ISDN phone systems, and older internet connections like ADSL and FTTC broadband, will be completely obsolete. Openreach is in the process of updating local telephone exchanges across the UK to enable this transition, ensuring that businesses stay connected with modern, all-digital technology.

How will the PSTN switch off affect my business?

Businesses relying on PSTN for telephony, internet services, and other connected equipment need to take action before 2027. This includes upgrading outdated phone systems, broadband connections, and any devices that currently rely on PSTN, such as alarms, EPOS machines, and door entry systems.

The switch off will impact:

Telephony services: Businesses using traditional phone lines (including ISDN) will need to transition to modern solutions, such as VOIP (Voice over Internet Protocol) services.
Broadband: Businesses relying on older ADSL or FTTC broadband will need to upgrade to full-fibre broadband for faster, more reliable internet.
CCTV and security systems: Many businesses don't realise that their CCTV, alarm systems, and other connected devices may also use the PSTN network, meaning they will need to be upgraded to stay operational.

Will the PSTN switch off affect my CCTV and security systems?

Yes, it’s likely that your CCTV and security systems could be impacted by the PSTN switch off. Many security systems rely on traditional phone lines or older broadband connections to transmit data or send alerts. After the switch off, these systems may no longer function as intended.

If your CCTV or alarm systems are still using PSTN infrastructure, it's crucial to upgrade them to modern, IP-based systems that utilise the latest broadband and fibre technology. This will ensure they remain operational and continue providing the security your business needs.

At PCN, we offer tailored CCTV and security solutions designed to integrate with modern, digital networks, ensuring your systems are up to date and ready for the future. Learn more here.

How do I prepare my business for the PSTN switch off?

To future-proof your business and avoid any disruptions when the PSTN network is fully switched off, consider these key steps:

Upgrade your phone system: Switch to VOIP technology for reliable, cost-effective communication. You can learn more about our VOIP solutions here.
Upgrade your broadband: If you're still using ADSL or FTTC broadband, make the transition to full-fibre broadband for faster speeds and greater reliability.
Assess all PSTN-dependent equipment: Review all your systems (such as alarms, EPOS machines, CCTV) that rely on PSTN and plan to upgrade them to modern alternatives.
Get expert advice: The transition to a digital-only network can be complex, but we’re here to help. Our expert team can guide you through the process of upgrading your telecoms and security systems. Contact us to get started.

When is the PSTN switch off happening?

While the full PSTN switch off won't occur until 2027, it’s important to start preparing early to avoid potential issues. The PSTN stop-sell phase began in 2023, meaning new customers will no longer be able to sign up for PSTN-based services.

For more detailed information on the PSTN switch off and the government’s plans, visit this research brief.

What can PCN do for you?

At PCN, we can help you navigate this transition and ensure your business remains connected, secure, and ready for the digital future. Whether you need to upgrade your phone systems, broadband, or CCTV systems, our expert team is here to provide guidance and solutions tailored to your business.

Get in touch today to discuss how we can help you make the switch and keep your business future-ready.