PSTN switch-off 2027 in Northern Ireland

The switch-off applies to Northern Ireland too

The 2027 switch-off is sometimes talked about as a Great Britain story, but it is genuinely UK-wide, and Northern Ireland is part of it. The Public Switched Telephone Network, or PSTN, is the traditional copper landline network that has carried calls for decades, alongside ISDN for businesses with multiple lines and switchboards. Both are being retired, and the national switch-off date is 31 January 2027. The programme is overseen by the regulator, Ofcom, and it applies to Belfast, Derry/Londonderry, Lisburn, Newry, Armagh and every town and county in between.

This is not a recommendation or a sales push. Once the copper network closes, calls no longer route over it, and any line that still depends on it simply goes dead. Sales of new copper lines have already stopped across most of the UK, and some exchanges are switching off ahead of the national date as part of the phased rollout. If you run a business anywhere in Northern Ireland, you need a plan to move your phones, and anything else plugged into a line, off the old network before the deadline.

We have a separate, plain-English explainer of the change itself: our full UK switch-off guide covers the dates, the timeline and the step-by-step preparation in detail. This page focuses on what the switch-off means specifically for Northern Ireland businesses and how to use the move to your advantage.

What it affects beyond your phones

The part NI businesses most often overlook is that the switch-off catches far more than handsets. Anything that has quietly used a phone line for years will be affected once the copper network closes. It is worth treating the deadline as a full audit of everything connected to a line, not just a phone upgrade.

Lead times for replacing alarm and lift equipment can be long, and demand will climb as the date approaches, so speak to each device supplier early. For day-to-day phones, the replacement is a cloud system where calls travel as data over your broadband, with your 028 number living in the cloud rather than tied to a single line at one address.

Why NI businesses should act now

The deadline is fixed, but the work to get ready is not instant, and that matters more in Northern Ireland than people assume. Full-fibre installs can have lead times, alarm and lift upgrades take scheduling, and porting teams get busy exactly when everyone leaves it late. Acting now means you move calmly, on your own timetable, instead of scrambling in January 2027.

There is a local advantage too. Northern Ireland has a single area code, 028, that covers the whole region, so one recognisable local number can front your entire operation from Coleraine to Crossmaglen. When you move to the cloud, that 028 identity comes with you and stops being chained to a physical line, which is ideal if you trade across NI, serve customers in the Republic as well as the UK, or have staff split between an office, home and the road.

Switching early also gives you features the old network never could: an auto attendant that answers and routes calls, ring groups and call queues, voicemail to email, and apps so a colleague in a different town can pick up the main line without anyone noticing where they are. The phone system is the core product. An AI receptionist is an optional add-on you can switch on later if you want callers answered and triaged automatically when the team is flat out.

Keep your 028 number when you switch

Keeping your number is the most common worry, and the answer is reassuring. You do not cancel your old line and hope a new number will do. Instead you move your existing 028 number across through number porting, which is a standard, usually free part of switching. The new provider arranges the port, the old line and the new cloud service run side by side until the transfer completes, and customers carry on dialling the exact same number throughout.

If you are starting fresh or adding a second presence, you can also get a new 028 number in minutes and point it at your team. Because 028 is the single code for all of Northern Ireland, that one number reads as local to a customer anywhere in the region, whether you are based in Belfast or Enniskillen.

Will it work on Northern Ireland broadband?

For the vast majority of teams, yes, including in rural areas. A cloud phone call uses only a modest amount of data, roughly 100 kbps in each direction per simultaneous call, so a standard broadband connection or even a decent 4G signal is usually more than enough. A small office on a typical fibre or superfast line can run several calls at once without any noticeable strain.

If your connection is shared with heavy file transfers, video calls or a busy network, voice traffic can be prioritised so calls stay clear when the line gets busy. If you want to check your own line before you commit, our guide to the internet speed you need for VoIP walks through the numbers and how to test them, including for rural and 4G connections. If you are weighing up a wider move, the Northern Ireland phone system hub brings together everything in one place.