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The PSTN (Public Switched Telephone Network) deadline 2025-2

The Public Switched Telephone Network (PSTN) is an analog system relying on underground copper wires for communication. However, this outdated hardware can no longer meet current demands and is being gradually replaced by cloud-based systems.


We are transitioning to a fully digital phone network powered by IP (Internet Protocol) technology. This process has already begun, with plans to complete the transition before Openreach retires PSTN and ISDN services in 2027. By that time, every phone line in the UK will operate digitally, routing calls over IP instead of PSTN. Any services not migrated to the new network will cease to function.


In addition to PSTN, Integrated Services Digital Network (ISDN) lines are also being retired. Introduced in 1986 as an improvement over analog landlines, ISDN offered features that were unavailable with traditional systems. However, it too is now obsolete and unable to compete with modern IP technology.

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What is the PSTN Switch-Off?

Can I Still Buy Traditional Phone Line Services?

What’s the Difference Between Cloud Telephony and IP Telephony?

Can I Still Buy Traditional Phone Line Services?

No, the sale of traditional phone line services, including copper-based and Fibre to the Cabinet (FTTC) connections, has ended as of September 2023. These older networks are incompatible with the transition to digital. While you can no longer purchase or modify these services, maintenance support will continue until the final switch-off. 

Is IP Technology Better Than PSTN?

What’s the Difference Between Cloud Telephony and IP Telephony?

Can I Still Buy Traditional Phone Line Services?

Absolutely. PSTN was designed for the 20th century and struggles to meet modern communication demands. As reliance on mobile and internet-based technologies grows, transitioning to IP offers significant advantages:


  • Flexibility: Make and receive calls on any device using the same number.


  • Integration: Link calls, video chats, and collaboration tools with business applications.


  • Cloud Access: Store and access systems from anywhere, enabling remote work.


What’s the Difference Between Cloud Telephony and IP Telephony?

What’s the Difference Between Cloud Telephony and IP Telephony?

What’s the Difference Between Cloud Telephony and IP Telephony?

 

Cloud telephony is an internet-based phone service that reduces costs by eliminating the need for on-premises equipment. It uses VoIP (Voice over Internet Protocol) technology to provide advanced features and flexibility via the cloud.


IP telephony includes cloud telephony but also covers SIP (Session Initiation Protocol), which connects legacy on-premises equipment to modern digital networks.

Who Will the PSTN Switch-Off Affect?

Who Will the PSTN Switch-Off Affect?

What’s the Difference Between Cloud Telephony and IP Telephony?

 The digital switch-off will impact everyone—businesses and households alike. This includes not only phone services but also non-voice systems that rely on PSTN or ISDN lines, such as alarms, EPOS machines, door entry systems, CCTV, and fax machines.


Why Is This Happening?

Who Will the PSTN Switch-Off Affect?

Why Start Preparing Now for 2027?

The PSTN network has supported the UK’s communications for decades, but advances in technology have rendered it outdated. Modern innovations like smartphones, cloud services, and the Internet of Things demand infrastructure that PSTN cannot support. The copper wiring that underpins the network, some of which dates back to the 19th century, is no longer adequate. 

Why Start Preparing Now for 2027?

Who Will the PSTN Switch-Off Affect?

Why Start Preparing Now for 2027?

Switching to digital requires careful planning, especially since it affects more than just phone calls. Devices connected to your phone line, such as alarms and door entry systems, may need to be upgraded or replaced. Many businesses have already embraced digital communications by adopting cloud-based solutions, internet calling, and video conferencing. Starting now ensures a smooth transition ahead of the 2027 deadline. 

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