The clock is ticking. In less than 8 months, thousands of UK businesses will lose their phone lines.
The UK’s traditional phone network (PSTN) switches off in January 2027. When it goes, anything still relying on old-style phone lines will simply cease.
That’s not just the phones. It can be alarms, lift lines, card machines, entry systems, and broadband services tied to PSTN. This could result in situations such as customers calling and getting silence, payments failing at the till, and a critical line going dead. If you haven’t planned the move, you’ll likely be acting under pressure, which can lead to all kinds of mistakes.
This is why IP telephony has become the default. It keeps your numbers and calls running over an internet connection, and it’s the route you need to take before the deadline.
So, how is data exchanged on the internet?
Plain and simple: IP moves information over your internet connection, so calls travel like everything else you use every day, like email, Teams and cloud apps. It’s fast, flexible, and built for modern business.
What exactly is IP telephony?
IP telephony is the modern way to run business phone services, and with the January 2027 PSTN switch-off, it’s no longer just an alternative. It replaces traditional phone lines by carrying calls over your internet connection (or a dedicated data connection), enabling modern features and easier management.
For most organisations, moving to IP telephony is now the standard approach for keeping numbers, handsets and call flows working reliably.
Key benefits of switching to IP now (before January 2027)
- Stop paying for outdated systems: Move voice off legacy line rental and consolidate costs into one IP service. The closer we get to January 2027, the less sense it makes to keep investing in infrastructure that’s being switched off.
- Stay reachable, even when plans change: Route calls to mobiles, laptops, or another site if a building has an outage. Keep customer calls flowing during office moves, refurbishments, or unexpected disruptions. As PSTN fallbacks disappear, this resilience becomes essential.
- More features for optimal efficiency: Use auto-attendants, call queues, call recording, and simple reporting to spot missed calls and busy times.
- Make changes with ease: Add users, update call routing, and manage multiple sites without waiting for physical line work. Modern platforms also support stronger security controls and regular updates. This is important as more business communication moves online.
- Scale up (or down) without the headache: New starters, new sites, seasonal peaks, you can adjust quickly without waiting on hardware installs.
Why Should I Move Now and What Steps Do I Need To Take?
You might already be using cloud-based systems, like Teams, CRM and online accounting, but your phone lines can still be quietly tied to the old network, which is what people don’t realise.
The PSTN switch-off turns this into a business continuity issue. You need to identify every line that matters (main numbers, alarms, lifts, payment lines), migrate them, and test them well before January 2027. If you leave it late, you risk supplier lead times, unexpected costs, rushed installs, and avoidable downtime.
Moving now gives you breathing room. You can map every critical line, migrate numbers safely, and test properly, without the panic of a looming cut-off.
If you wait too long, you could risk rushed decisions, limited engineer availability, and avoidable downtime. Once the deadline passes, your customers will still call. Make sure you can answer.
If you’re not sure where to start, Immervox can help you identify what you have today, explain your options in plain English, and build a practical plan for PSTN migration ahead of January 2027. Keep your business reachable, with minimal downtime. Start your migration today.
