UK’s Analogue PSTN Switch-Off Postponed to 2027

In an era where technological advancements are propelling us towards an increasingly digital future, the United Kingdom’s decision to postpone the phase-out of its analogue phone network marks a significant juncture. Scheduled to transition to a fully digital Public Switched Telephone Network (PSTN) by 2025, the recent announcement indicates a revised deadline extending to January 2027.

This deferment, orchestrated by OFCOM and key industry players, reflects a cautious approach to addressing critical issues that have surfaced. Among the concerns are the compatibility of digital systems with life-critical alarm services and the resilience of these systems during power outages.

As the implications of this delay unfold, it’s prudent to consider not only the technological and logistical aspects of such a sizable undertaking, but also its profound impact on millions of users—including the elderly and those in remote regions who rely extensively on existing analogue services.

The intricate details of this transition and how it plans to accommodate the needs of all users, remain a topic of paramount importance and contemplation.

Analogue to Digital Challenges for 2027

While the transition from analogue to digital telephony promises enhanced features and efficiencies, it also presents significant challenges, particularly regarding the compatibility and reliability of existing alarm systems and the dependence on power for IP-based solutions.

The UK’s shift from the PSTN to digital services has raised concerns among nearly two million users reliant on alarm systems, who face potential risks during power outages, especially in rural regions. OFCOM is actively reviewing mobile resilience strategies to mitigate such service interruptions.

Moreover, the rescheduling of the digital transition to January 2027, with BT and other providers halting non-voluntary migrations, reflects the complexities involved. Openreach has adjusted its Wholesale Line Rental (WLR) withdrawal to coincide with this new deadline, acknowledging the need to sustainably manage the changeover without compromising service quality or user safety.

Alarm System Incompatibilities

Recognising the complexities of updating the UK’s telephony infrastructure, it is critical to address the incompatibilities that alarm systems face with emerging digital services. These systems, which include critical telecare devices, often rely on the soon-to-be-obsolete PSTN and may not function effectively with new digital voice services.

An estimated 2 million individuals in the UK depend on such alarm systems, which necessitates a careful and considerate transition. The postponement of the analogue phase-out to January 2027 allows additional time for telecare providers and consumers to adapt their equipment.

Openreach’s testing of the Single Order Transitional Access Product (SOTAP) is a step towards ensuring continuity of service for vulnerable customers during this technological transition.

Rural Areas Landlines / Phone Service Dependency Risks

The delayed transition to digital telephony systems poses significant risks for rural communities, which are particularly vulnerable to service disruptions during power outages. The reliance on analogue services, which are typically more resilient to power fluctuations, underscores the challenges that the shift to digital telephony systems may bring:

  • Digital systems often require continuous power, risking outages during failures.
  • Emergency services accessibility could be compromised without reliable backup solutions.
  • Telecare services, critical for many rural residents, might face compatibility issues.
  • Rural businesses reliant on analogue systems could experience disruptions impacting their operations.

Addressing these risks is paramount to ensuring a seamless transition, maintaining the safety and well-being of individuals in rural areas, and ensuring the continuity of their daily activities and services.

UK Government and OFCOM’s Resilience Review

OFCOM’s resilience review is set to thoroughly examine the robustness of mobile networks, particularly in the context of the transition from analogue to digital telephony services, to ensure reliable communication during power outages and other disruptions.

This initiative comes as the UK prepares to shift away from legacy analogue systems, impacting millions who depend on these services, including those using life-critical alarm systems. The review will address the vulnerabilities that may arise, especially for individuals in remote areas who are at greater risk during power failures.

In postponing the transition to January 2027, OFCOM has recognised the need for a comprehensive strategy to mitigate service interruptions and safeguard the continuity of communications, emphasising consumer safety and service reliability as paramount.

Extended Digital Phone Service Transition Timeline

In response to numerous challenges faced during the analogue to digital telephony transition, UK authorities have extended the deadline to January 2027, granting additional time for businesses, service providers, and consumers to adapt. The decision reflects the complexity of the nationwide shift from the traditional PSTN to a fully digital network.

Key considerations leading to the extended timeline include:

  • The need to ensure compatibility with critical safety systems, such as alarm and telecare services
  • Addressing the power dependency of IP-based phones, which impacts rural areas during outages
  • Mitigating the potential disruption to the nearly 2 million UK residents dependent on legacy alarm systems
  • Providing sufficient time for the telecommunications industry to manage the logistical aspects of the transition

Move to Digital Voice Services and PSTN Switch-Off Updates

UK authorities have announced that the PSTN closure may extend to 31 January 2027 or later to ensure a smooth transition to digital voice services. This delay reflects the complexities of migrating nearly 2 million UK individuals reliant on alarm systems and addressing the vulnerabilities faced by rural areas during power outages. Openreach has coordinated the withdrawal of Wholesale Line Rental (WLR) products with the updated switch-off timeline, pausing non-voluntary migrations to minimise disruptions.

As the PSTN switch-off progresses, legacy copper-based services are becoming increasingly scarce. Providers continue transitioning users to digital solutions, but the changeover impacts telecare devices dependent on PSTN connections. Ofcom is actively reviewing mobile network resilience and the industry is working to mitigate the effects of this significant infrastructural overhaul.

SOTAP Product Pilot Launch

Openreach is set to commence pilot testing of the Single Order Transitional Access Product (SOTAP), a novel solution designed to maintain analogue services for vulnerable customers during the digital transition period. As the UK moves towards a fully digital telephony infrastructure, the SOTAP initiative represents a critical lifeline for those who may be affected by the switch-off of the PSTN.

Key features of the SOTAP include:

  • It operates independently of a broadband connection.
  • SOTAP is specifically tailored for those reliant on existing analogue services.
  • The pilot aims to ensure continuity of service without disruption.
  • It serves as an interim solution pending full digital migration.

This approach underscores the commitment to a seamless transition, prioritising customer needs and service reliability.

Telecare IP Device Implications

As the SOTAP pilot seeks to accommodate vulnerable customers, the implications for telecare devices, which are heavily reliant on the PSTN, emerge as a critical concern in the analogue to digital shift.

The postponement of the switch-off to potentially January 2027 provides a reprieve for nearly 2 million UK individuals dependent on alarm systems. This delay is crucial as it allows for a more considered transition for telecare services, which are essential for the safety and well-being of the elderly and disabled.

Ofcom’s ongoing review into mobile resilience is also pertinent, ensuring that alternative solutions offer reliable support during power outages, particularly in rural areas. The extended timeframe is expected to facilitate a smoother migration to compatible digital voice services, mitigating the risk of service interruptions for these critical devices.

Traditional Phone Services Infrastructure and Reliability Concerns

While the PSTN network has been the backbone of communication for decades, its ageing infrastructure presents significant reliability concerns as the UK moves towards a digital telecom landscape. The transition to a fully digital telecommunication system is putting a spotlight on several issues:

  • Maintenance Challenges: The cost and complexity of maintaining the old network are becoming unsustainable.
  • Service Disruptions: Transition-related service disruptions could impact critical services such as emergency lines and alarm systems.
  • Rural Area Coverage: Those in rural areas face greater risks due to potential service outages and slower response times.
  • Resilience to Power Outages: Digital systems’ dependency on power sources poses additional risks during power cuts, unlike the more resilient analogue lines.

Addressing these concerns is essential to ensuring a smooth transition and reliable communication infrastructure for the future.


Q: What is the latest update on the BT Business PSTN and ISDN switch-off?

A: The switch-off of BT Business PSTN and ISDN has been postponed until 2027.

Q: Will my current broadband still work after the switch-off in 2027?

A: It is important to upgrade to digital phone lines to ensure your broadband continues to work effectively after the switch-off.

Q: What is the significance of OFCOM in relation to the switch to digital phone lines?

A: OFCOM is overseeing the transition from PSTN and ISDN to digital phone lines to ensure a smooth process for businesses across the UK.

Q: Will my existing phone system work with digital voice services?

A: You may need to upgrade your phone system to work with digital voice services such as VoIP for a seamless transition to digital phone lines.

Q: How can I make sure my business is ready to switch to digital phone lines?

A: Contact Spire Technology Group to discuss the steps needed to transition your business onto digital phone lines before the end of 2026.

Q: How will the switch to digital phone lines benefit my business?

A: Migrating to digital phone lines can enhance your communication capabilities, enable features like video conferencing, and support the digital transformation of your business.

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