Forget your worries with our PSTN switch off support
The Public Switched Telephone Network (PSTN) will be fully retired by the end of 2027. Our migration services help you replace analogue and ISDN lines with modern, digital solutions without disruption.
The challenge
The PSTN has underpinned voice, alarms, lifts, payment devices, and monitoring systems for decades.
Its switch-off means every line and service relying on analogue or ISDN technology must be upgraded. This affects everything from door entry systems to card payment machines. And it’s not just connectivity either, as there’s a good chance voice services will need a fresh too.
Without a clear inventory, project plan, and testing process, businesses risk losing critical services on the cut-off date. Complex estates may have dozens or hundreds of affected lines spread across multiple sites. Left unmanaged, the transition can lead to costly downtime, missed customer calls, and gaps in compliance.
Our solution
Such a significant change must start with a structured, end-to-end migration programme.
First, we audit every connection and phone line to identify what’s connected and what it supports. Then, we recommend the right replacement, from SIP trunks and hosted VoIP migration for telephony to compatible solutions for alarms, lifts, and specialist equipment.
Once that’s agreed, we’ll coordinate with carriers, handle number porting, router replacement and configuration, and train users to ensure a smooth cutover.
Reliability assured
We own the entire process to ensure your services stay online beyond the PSTN switch-off, without unexpected downtime.
Expert support
Our telephony and networking specialists handle everything from porting to device configuration, for a smooth migration.
Full control
Detailed audits, phased cutovers, and coordinated delivery, all to your timeline, putting you in control of the entire transition process.
Scales seamlessly
Easily add or change SIP and hosted VoIP services as your business grows, without costly infrastructure changes.
Who it’s for
Businesses with multiple PSTN or ISDN lines needing a coordinated switch-off and telephony upgrade strategy.
Operations running critical services over analogue connections.
IT teams seeking to manage the transition with minimal disruption.
Key benefits
Complete inventory of all lines with mapped dependencies.
Specialist solutions for alarm lines, lifts, and other non-digital voice services.
Coordinated delivery with carriers, engineers, and internal teams.
User training to ensure adoption of new systems.
Smooth PSTN and ISDN migration to SIP trunks or hosted VoIP with minimal downtime.
Works well with
Explore complementary solutions that will enable your PSTN Switch Off journey:
Unified Communications and Collaboration
Fixed Connectivity
Mobile Connectivity
Wi-Fi and Managed Network
Start your journey
Discover how hard your connectivity is working for you.
Our FREE Connectivity Audit quickly assesses the security, performance and potential for improvement across your existing connectivity services. You’ll get a clear, actionable report with expert recommendations to help you plan your next steps.
Understanding your current state is the first step towards building the right foundations for your future growth.
Our point of view
“The PSTN switch-off the biggest change to business connectivity since the introduction of Broadband. It’s a major operational shift that touches almost every part of a business, but too often, we see organisations focus only on voice, overlooking alarms, lifts, and payment devices that will also stop working.
Our approach ensures no service is left behind. By auditing, planning, and delivering analogue line replacement and connectivity upgrades in structured phases, we make the transition seamless and predictable and ensure there’s no problems on switch-off day.”
How we deliver
Managed Services
Managing today
We take care of the platforms, infrastructure and services your business depends on so your teams can focus on growth, not firefighting. From basic coverage to enterprise-grade assurance, our Managed Services are designed to reduce risk, maintain availability and keep you moving forward.
Strategic Change
Building tomorrow
We deliver change with structure, clarity and confidence helping you reduce risk, increase value and modernise for the future. Our approach is built around real-world outcomes, not theoretical transformation.
The real FAQs for PSTN Switch Off
The PSTN Switch Off raises many more questions than just “what will replace my phone lines?”. From identifying at-risk services to planning the migration timeline, here are the most common questions we hear from businesses in your position.
When is the PSTN being switched off?
Which systems will be affected?
Beyond telephony, PSTN supports alarm systems, emergency lift phones, card payment terminals, faxes, and telecare devices. Any system relying on analogue copper lines must be reviewed and upgraded before 2027.
Can we keep existing phone numbers?
Absolutely. We can port your numbers to modern SIP trunking or hosted VoIP. This ensures continuity, so customers and suppliers can still reach you after migration with no impact.
What are the options replacing PSTN?
There are several connectivity technologies that could replace your PSTN services, which you can find more information on by visiting our [Fixed Connectivity] page.
For any voice services running over those lines, we offer:
- SIP trunking— reliable voice calls over IP using existing or new internet access.
- Hosted VoIP— a cloud-based phone system requiring no on-site PBX hardware.
Both options provide richer features, improved flexibility, and better cost control and you can find more info on those by booking a call with one of our experts, using the button below.
How will we handle alarm lines and lift phones?
These legacy services must be modernised. We assess each system and provide compatible, digital replacements, from VoIP-capable alarm interface units to IP-based emergency systems, that are fully tested before activation.
What about installation downtime?
Our phased cutover approach ensures minimal disruption. We conduct pre-migration testing, have fallback provisions in place, and provide fallback options during the transition to ensure continuity of core services.
Do we need to upgrade our internet?
Possibly. Digital voice services run over your internet. We evaluate your bandwidth and redundancy, recommend upgrades if needed, especially for SIP or hosted VoIP to ensure voice quality and reliability.
Can multi-site businesses migrate smoothly?
Yes. We coordinate migrations across all sites in a schedule that aligns with your operations to minimise disruption, using consistent templates and phased delivery.
Speak to an expert
Not sure where to start? Have a question we haven’t answered?
Our connectivity specialists are here to help.
Talk to us today and find out how we can future-proof your internet access and make managing your connectivity estate even easier.
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