How to Migrate from PSTN Without Disrupting Your Business
Many businesses delay moving away from PSTN because they’re concerned about downtime. It’s the question we hear most often: “What happens to my phones while this is happening?” The honest answer is, with the right provider, none. Here’s exactly how a smooth migration works, and how TTNC keeps your business running throughout.
Why businesses put migration off
With the PSTN and ISDN switch-off deadline of 31 January 2027 now confirmed, every business relying on a traditional phone line needs a plan. But for many, the barrier isn’t understanding that they need to move. It’s fear of what moving will actually involve.
Will there be a gap where the phones stop working? Will the number change? Who carries out the work, and how long does it take? These are reasonable questions, and they deserve straight answers.
The truth about migration downtime
Done properly, migrating from PSTN to a modern digital line doesn’t mean switching your business off. Numbers are ported, not replaced. Lines are provisioned and tested before your old service is switched off, not after. The overlap is what protects you.
The businesses that do experience disruption are almost always the ones who leave it too late, get rushed through a DIY switchover, or use a provider without a proper migration process. All of that can be avoided with the right preparation.
TTNC’s 5-step migration process
Here’s what moving to TTNC actually looks like, from first enquiry to going live.
Step 1: Free consultation and line audit. We start with a free, no-obligation consultation to understand exactly what services, numbers and lines you currently have, and what your business needs. No jargon, no pressure, just a clear picture of your setup.
Step 2: Migration plan and quote. We put together a tailored migration plan and quote, including your number porting details and your 5% price-beat comparison against your current bill.
Step 3: Porting and provisioning. We handle the porting paperwork end-to-end and provision your new systems in parallel with your existing service, so nothing is switched off until your new setup is tested and ready.
Step 4: Testing and switchover. We test your new lines fully before go-live. Once everything checks out, we switch over during a low-impact window agreed with you, with an engineer on hand throughout.
Step 5: Live, checked, and supported. Your numbers and services are live on your new line. We follow up to confirm everything is working as expected, and you have a named contact for any support you need afterwards.
What this means for your business
• No period where your phones simply stop working.
• Your existing number(s) carry across, nothing changes for your customers.
• Clear engineer support throughout, not a call centre queue.
• A clear, agreed plan for your migration, not an open-ended project.
Addressing other common concerns
Downtime isn’t the only worry we hear. Cost is a close second. Specifically, the fear of paying two providers at once during the switch. That’s why every TTNC migration under our Switch-Off Ready offer includes double-billing cover, so you’re not out of pocket for running both services during the handover.
We’ll also beat your current provider’s price by 5% under the 24-month Switch-Off Ready offer, so migrating early is more cost-effective than waiting.
The real risk is waiting
The closer we get to 31 January 2027, the busier every provider’s migration teams will be, including ours. Businesses that migrate early get a calmer, more flexible process. Businesses that leave it to the last few months face queues, tighter timelines, and less room to fix anything that doesn’t go to plan first time.
Moving now, on your own schedule, is the lower-risk option, not the higher-risk one.
Ready to plan your migration?
Book a free consultation with TTNC and we’ll walk you through your options, show you the saving, and set out exactly what your migration would involve, with no obligation to proceed.
Book your free consultation → www.ttnc.app/switch-off-ready
