For years, migrating to cloud telephony was framed as a destination.
Move users onto a UCaaS platform, retire the PBX, tick the box – and the public switched telephone network would quietly fade into history.
Yet as national switch-off deadlines approach, that neat narrative is collapsing.
Organisations that thought they had completed their cloud voice journey are discovering they merely paused the difficult parts.
Governance was deferred, networks were never fully tuned and identity controls remained disjointed.
The PSTN switch-off is turning these oversights into operational risks. What once looked like a straightforward telecoms upgrade is revealing itself as something deeper: a test of communications hygiene.
Strategy First, Not Afterthought
Alexander Wettjen, EVP Sales and Marketing at NFON, argues that many organisations misunderstood the nature of the transition from the beginning.
“The PSTN switch-off is less a straightforward migration project and more a wake-up call to rethink communications infrastructure in a strategic, integrated and future-proof way,” he says.
“Many organisations have adopted cloud telephony, but often as a standalone solution, without properly aligning it with network readiness, identity management, endpoints, monitoring, operational processes and more.”
In other words, cloud telephony was treated as a product deployment rather than a business capability.
The PBX moved to the cloud, but the organisation around it did not change.
As the PSTN safety net disappears, these shortcuts are becoming visible.
“It is now becoming clear that those who have simply moved telephony into the cloud, without taking a holistic approach, will face challenges around quality, transparency and operations as the PSTN switch-off progresses; ultimately, the future viability of their business communications is at stake.”
Yet he sees opportunity in the disruption.
Cloud voice can be a foundation for automation, analytics and smarter service delivery.
“At the same time, the transition offers an opportunity not only to modernise communications, but to develop them in a more purposeful way,” he says.
“When business telephony is understood as a core component of the overall communications strategy, it creates the foundation for automation, greater transparency and improved service processes.”
AI-driven call summaries, real-time transcription and intelligent routing promise new efficiencies. But these capabilities depend on disciplined implementation.
The PSTN switch-off is essentially forcing organisations to take communications seriously at last.
“The switch-off marks not only the end of a legacy technology, but also a clear impetus to structure communications in a smarter, more coherent and consistently future-oriented way.”
Networks And Reality
If NFON speaks to the strategy, Chris Rolls, Head of UC Experience at Vonage, speaks to operational reality.
He sees organisations struggling with timelines and complexity.
“Enterprises across Europe and North America are facing a tight timeline with PSTN’s impending switch-off, as Germany’s PSTN switch-off is already complete, and the UK’s retirement is set for 2027,” he says.
“The complexity of migration is proving harder than initially expected, since many organisations are still relying on traditional private branch exchange systems.”
Voice traffic is shifting to IP, but expectations have not changed.
Users still expect perfect calls, and that puts pressure on networks never designed for real-time communications.
“Users will always expect a call to function properly, whether it’s carried over VoIP, PSTN, or a mix of both,” he says.
“In practice, this makes it harder on enterprises because VoIP relies on the IP network. So, call quality and reliability are in the spotlight because they depend directly on the internet connection.”
The challenge is not only technical but cultural. Voice is converging with customer experience, contact centre operations and regulatory requirements.
“The PSTN switch-off coincides with another critical shift: the convergence of unified communications and contact centre capabilities,” Rolls says.
“Organisations are discovering that they need to treat voice environments as a complete, end-to-end service.”
