The PSTN Switch-Off Is Fast Approaching & Your Building's Critical Systems May Be Affected

The UK's analogue telephone network is fast approaching one of its biggest ever changes.

By 31st January 2027, the Public Switched Telephone Network (PSTN) will be permanently switched off as the UK's communications infrastructure transitions to fully digital services. While many organisations view this simply as a telecommunications upgrade, the reality is that it has much wider implications for building safety and resident welfare.

For housing providers, NHS organisations, local authorities and facilities management teams, now is the time to understand which building systems still rely on analogue phone lines and what action is required before the deadline arrives.

Why This Matters

The PSTN has supported communication systems for decades, allowing everything from warden call systems to remote access control to communicate reliably over traditional telephone lines. As analogue infrastructure is withdrawn, those systems may lose their ability to communicate unless they are upgraded to digital alternatives.

Recently, there had been rumblings of delays to the switch off, however, the Technology Enabled Care Services Association (TSA) has warned that organisations should not expect any delay to the January 2027 switch-off. Organisations responsible for buildings and residents have a duty to ensure critical systems remain operational throughout the transition.

As analogue services continue to be retired across the country, delaying migration increases the risk of serious communication failures and places additional pressure on organisations trying to complete upgrades before the deadline.

More Systems May Be Affected Than You Realise

Many people are surprised to discover the number of systems that still depend on analogue connectivity.

In residential buildings, this often includes warden call and telecare systems that vulnerable residents rely upon to call for assistance. Older door entry and access control systems may also use dial-up connections for remote communication, while lift emergency telephones, intruder alarms and some legacy fire alarm signalling equipment can also depend on analogue networks.

Although these systems may continue to function within the building itself, their ability to communicate with monitoring centres or emergency responders could be compromised once analogue services are withdrawn.

Understanding exactly where analogue technology remains across your estate should be one of the first steps in any migration programme.

Warden Call Systems Demand Particular Attention

For many housing providers, the most pressing challenge will be warden call and grouped living systems.

These systems provide an essential lifeline for residents, enabling them to request assistance quickly in an emergency. Where analogue communication remains in place, organisations should already be planning upgrades to fully digital solutions.

With procurement, resident engagement, installation and commissioning all requiring careful planning, waiting until the final months before the switch-off could significantly increase project risks.

Don't Forget Door Entry and Access Control

Access control is another area where analogue technology is often overlooked.

Many older intercom and door entry systems still rely on telephone lines for remote connectivity. Upgrading these systems to IP or 4G connectivity not only ensures continued operation after the PSTN switch-off but also provides opportunities to improve reliability, simplify maintenance and introduce additional functionality such as remote diagnostics and management.

For many organisations, these upgrades can be delivered relatively quickly once affected systems have been identified, making them an effective early step within a wider migration programme.

Planning Ahead Will Reduce Risk

The January 2027 deadline may appear some distance away, but organisations with large or complex property portfolios have relatively little time to complete the work required.

Before any upgrades can begin, building owners need to identify affected systems, prioritise those presenting the greatest risk, secure funding, procure replacement equipment and schedule installation programmes. As demand for digital migration continues to increase, organisations delaying these decisions may face longer lead times and reduced contractor availability.

Reviewing your building portfolio now allows sufficient time to develop a structured migration plan and complete works in a controlled manner rather than responding under unnecessary time pressure.

How Ventro Can Support Your Digital Migration

Ventro works with housing providers, healthcare organisations, local authorities and commercial building owners to upgrade critical building systems and maintain compliance throughout periods of regulatory and technological change.

Our teams can assess existing infrastructure, identify systems that remain dependent on analogue communications and deliver upgrades across access control, door entry, life safety and other building compliance systems. By taking a coordinated approach, organisations can reduce their risk while ensuring critical services remain available long after the PSTN switch-off has taken place.

Ventro's View

The PSTN switch-off is often viewed as a telecommunications project, but for building owners it is fundamentally a building compliance and resident safety issue. Many organisations will have systems across their estate that continue to rely on analogue connectivity without fully realising it. Identifying those systems now provides the opportunity to plan upgrades in a controlled and cost-effective way, rather than responding to increasing pressure as the January 2027 deadline approaches.

At Ventro, we encourage organisations to use the digital migration as an opportunity to review the wider resilience of their building infrastructure. Whether that's upgrading access control, replacing ageing warden call systems or modernising other critical life safety technologies, taking a strategic approach will strengthen compliance and help ensure residents continue to receive the protection and support they depend upon.

The Time to Act Is Now

For building owners and dutyholders, the priority should now be understanding which systems rely on analogue communications and developing a clear migration strategy well before January 2027. Taking action now will help protect residents, maintain and avoid unnecessary disruption as the UK's digital transition reaches its final stages.