Openreach is calling on businesses across the UK to accelerate their migration to digital networks as the January 2027 PSTN switch-off deadline approaches. With the transition now in its final phase, businesses and Communications Service Providers (CSPs) still relying on legacy systems risk being left behind.
From 2027, the public switched telephone network (PSTN) will be switched off by BT, although the original deadline of December 2025 will apply to some. For others, it was pushed to January 2027 in acknowledgement of the complex factors involved in transitioning from PSTN to all-IP network. BT cited its reasons for the switch off as making way for more modern, digital-based phone networks using IP technology as PSTN struggles to keep pace with communication demands today.
Many businesses continuing to rely on outdated PSTN infrastructure risk both their operational effectiveness and bottom lines. As legacy networks are decommissioned, systems such as payment terminals, security alarms, ISDN systems, and landline phones will cease to work, potentially leading to significant disruptions.
“The nationwide transition to an All-IP network is a huge undertaking, and ensuring vulnerable users are protected during the shift has been a priority,” said James Lilley, Director of All IP, Openreach. “Now that we are confident we have addressed those needs and can safely transition vulnerable customers, the deadline is set. It’s time for businesses to act and unchain their networks from legacy infrastructure. The digital world won’t wait for those that stall. Every day of delay risks disruptions, higher costs, and missed opportunities.”
The steps to make the transition are clear: review, test, and switch. Businesses should start by reviewing their connectivity estate to identify any equipment still relying on PSTN.
Testing this equipment can be done for free at Openreach’s test labs, ensuring compatibility with All IP networks. Businesses should switch to a digital solution as soon as possible. Openreach is offering a range of resources to help businesses through the transition, including support for edge cases and temporary solutions if needed.
Businesses still unsure how they are impacted by the switch-off should contact their service provider.
The PSTN switch-off deadline is set for January 2027, although some CSPs have earlier dates including December 2025, and businesses that wait will face mounting costs, security risks, and missed growth opportunities. Openreach is urging all businesses to make the move today and unlock the full potential of next-generation communication technologies that will power the future of business.
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