The copper phone network switches off in January 2027. Is your business ready?
Phone lines, card machines, alarms and lifts can all rely on analogue lines. We find what is affected and move you to a cloud phone system, SIP trunks or digital lines before the deadline.
What is the PSTN switch-off?
The PSTN is the UK's traditional copper phone network. It is due to be retired on 31 January 2027, so business phone lines are moving to internet-based (VoIP) services. DNS Utilities helps you find services that still depend on analogue lines and move them to a cloud phone system, SIP trunks or digital lines, keeping existing numbers where possible.
Reviewed by the DNS Utilities team, October 2026.
What we help you move to
Cloud phone systems
Calls over your internet connection, on desk phones, apps or computers.
SIP trunks
Connect a phone system you already own to the internet.
Digital replacements for landlines
Replace analogue and ISDN lines with digital equivalents.
Business mobile
Mobile plans for staff on the move.
Number porting
We help move your existing numbers across.
Equipment review
Find card machines, alarms and other kit still tied to a phone line.
Old line versus new
| Analogue / ISDN line | Digital voice (VoIP) | |
|---|---|---|
| Runs over | Copper phone network | Your internet connection |
| Future | Being retired | Where the network is heading |
| Features | Basic calling | Call routing, mobile apps and more |
| Moving office | Often needs a new line | Often just plug in at the new site |
A general guide to the move from analogue to digital voice.
Three steps, no jargon
Review
We help list everything at your premises that uses a phone line.
Plan
We choose replacements and plan the move of your numbers.
Switch
We arrange the installation and test everything before the old lines go.
Is your business ready for the switch-off?
Many businesses discover hidden phone-line dependencies only when something stops working.
PSTN switch-off check
Tick anything at your premises that might still use an analogue phone line.
Business telecoms: your questions answered
The UK's traditional copper phone network (PSTN) is being retired, with the final switch-off scheduled for 31 January 2027. Voice services are moving to internet-based technology.
It might if it uses an analogue phone line. Many modern terminals use broadband or mobile data. Check yours now so you are not caught out.
Usually yes. Numbers can generally be moved (ported) to a new provider, though some cases need checking.
Voice over IP means phone calls travel over your internet connection instead of a traditional phone line.
A backup connection or a call-forwarding plan to mobiles can keep you reachable. We can help set one up.
Not always. Existing handsets can sometimes be reused with adapters, or you can use apps on mobiles and computers.
Getting a quote is free and carries no obligation. We will explain how we are paid before you sign anything.
You might also need
Broadband & managed Wi-Fi
Business broadband, leased lines and managed Wi-Fi for one site or many.
Card payment solutions
Countertop, portable and integrated card terminals with a clear view of the fees.
New business setup
Gas, power, water, broadband, phones, card payments and waste, ready for opening day.
Get your business telecoms quote
Tell us what you need and a specialist will get back to you within one working day.