BT Urges Migration From Copper Network To Digital Infrastructure

BT is urging providers of Critical National Infrastructure (CNI) to transition away from the ageing copper network, which is becoming increasingly unreliable. The company is particularly focused on the impending shutdown of the Public Switched Telephone Network (PSTN), encouraging organisations to adopt digital alternatives such as VoIP services well ahead of the 2027 deadline.

According to BT, 60% of CNI customers in the UK have yet to formulate a migration strategy. While the complete withdrawal of physical copper lines will take years, the shift from analogue PSTN services to digital communication is an immediate priority. The transition, originally planned for an earlier date, was pushed back to January 31, 2027, to provide more time for businesses, service providers, and vulnerable users—especially the 1.8 million people who rely on home telecare systems—to adapt to the changes.

The ageing PSTN network is experiencing an increasing number of faults, making it a risky foundation for essential public services. Ofcom’s 2024 Connected Nations report revealed a 45% rise in major PSTN-related resilience incidents. If organisations fail to act before the shutdown, critical services could face significant disruptions, including water monitoring sensors, emergency phone lines, medical communication systems, security alarms, and transport infrastructure like lift alarms and train station help points.

Bas Burger, CEO of BT Business, stressed the importance of early action:

“With the copper landline network becoming more fragile, it’s simply too risky to run the UK’s essential public services on outdated systems. BT is committed to modernising these services ahead of the analogue switch-off, but we can’t do it alone. We urge all Critical National Infrastructure providers to act now, ensuring their services remain secure, reliable, and future-proofed.”

Despite the urgency, BT’s latest data shows that while 60% of its CNI customers have yet to begin their transition, some industries are making notable progress. In the energy sector, 80% of BT customers have initiated migration plans, while 64% of water industry clients have also made strides toward digital connectivity.

The Government has recognised the significance of this transition by introducing the PSTN Critical National Infrastructure Charter, which outlines protective measures for organisations moving off the legacy network. BT is a key signatory of this initiative, reinforcing its commitment to ensuring no business is left behind.