Alarms, EPOS And Oyster: It’s Not Just Phones Affected By The Landline Switch-Off

By Emma Lewis, bOnline

For years, the landline switch-off has sounded like one of those slightly abstract bits of infrastructure news that most people mentally file under “someone else will sort that out”. If your mobile works and your broadband is fine, it can feel like the rest is just background noise.

But the UK’s move away from the old copper-based phone network is starting to land in a much more practical way. And it’s not just about home phones disappearing from kitchen walls. It’s the systems running underneath everyday life; alarms, payment systems, even parts of transport access that are now being forced to adapt.

Once you start looking, it’s everywhere.

The End Of An Era

The UK’s traditional analogue phone network, known as PSTN, is being phased out and replaced with digital, internet-based systems. Openreach has been steadily working towards a full switch-off which will happen in January 2027.

On paper, it sounds great: modernise everything, move to fibre, simplify the network. In reality, the PSTN has been doing a lot more than carrying phone calls. It has been supporting equipment that nobody really thinks of as “telecoms” at all. And that is where the complications start.

Alarms That Still “Phone Home”

Take alarm systems. A large number of older burglar alarms and fire alarm panels still rely on a simple idea: if something goes wrong, they dial out over a landline. No WiFi. No app. Just a straightforward call to an alarm receiving centre.

That worked well when the copper network was universal and stable. But now that network is being retired, those systems suddenly need upgrades; often hardware replacements, not just a software tweak.

The tricky part is scale. These systems are not just in commercial buildings. They are in schools, small shops, care homes, rented flats. In many cases, nobody has touched the alarm panel in years, because there has been no reason to. But now there is.

And alarms are just one layer. Some telecare devices used by elderly or vulnerable people have also relied on landline connections. For those users, the switch is not just inconvenient, it can be disruptive if not managed carefully.

EPOS Systems: The Workhorse Of Retail

Then there is retail.

EPOS systems, electronic point of sale terminals are the backbone of shops, cafés and restaurants. Most modern setups already run over broadband or mobile networks, but older terminals and card machines have often used fixed-line connections or hybrid systems that assumed a landline would always be available.

The shift away from PSTN does not necessarily mean your local coffee shop suddenly stops taking payments. But it can expose hidden dependencies in older setups – backup lines, failover systems, or legacy card terminals that were installed years ago and never updated.

For small businesses especially, this is not just a technical change. It affects timing, cost, and downtime all at once. Upgrading a payment system is not something you want to do on a busy Friday afternoon.

There is also a broader point here: most businesses did not design their systems with “the end of the phone network” in mind. They designed them to be reliable. The assumption was always that the phone line would just be there.

Oyster Top-Ups Are In The Mix Too

Transport payments are also affected in a more indirect but important way.

Many independent retailers that provide Oyster top-up services currently rely on analogue (PSTN) telephone lines for their payment terminals. These terminals may not be compatible with the new digital, broadband-based systems, potentially leading to a loss of top-up facilities in some shops.

That matters more than it might sound at first glance. For a lot of people, especially those who prefer paying cash or who top up in person rather than online, these small local shops are a key part of how they access the transport network.

If those terminals stop working and are not replaced in time, the change will not feel like a technical upgrade. It will feel like a familiar service disappearing from the high street.

The End Of An Invisible Default

The reason this switch-off is so disruptive in places is not because the technology is especially new or complicated. It is because the PSTN became the default for decades.

If a device needed a reliable way to send a signal, whether that was a burglar alarm, a card machine, or a ticketing service, a phone line was the obvious answer. It was everywhere, it worked, and it didn’t really need thinking about, until now.

The Messy Reality Of “Upgrade Everything”

In theory, moving from copper to fibre is a clean upgrade. Faster speeds, better reliability, fewer ageing cables buried under roads and pavements.

In practice, it is a long tail of equipment that was not designed to be replaced quickly. Some systems are deeply embedded in buildings. Others are managed by contractors who only get called when something breaks. And many users simply do not know their device still depends on a landline until they are told it will not work anymore.

That has led to a growing focus on compatibility rather than just connectivity. It is not enough for a building to have broadband, the equipment connected to it has to understand how to use it, which is a subtle but important shift.

What People Tend To Underestimate

One of the most common misunderstandings is assuming this is purely a telecoms story. In reality, it is closer to an infrastructure chain reaction. The phone network supported a surprising amount of everyday technology. Because it was so universal, it became the default way to send a signal, trigger an alert or confirm a transaction.

When that default disappears, everything built on top of it has to choose a new path and not all of those paths are straightforward upgrades.

Some are. Plenty of modern systems already use broadband or mobile networks and will not notice much difference. But others will need physical replacement, rewiring, or full system redesigns.

A Transition Still In Progress

The landline switch-off is not something that happens overnight. It is a gradual process, and in many areas it already feels like it has happened without people noticing. But the remaining edge cases are often the most important ones: safety systems, payment infrastructure, and small everyday services that keep local life running smoothly.

So while the headline might sound like the end of phone calls on copper wires, the real story is broader than that. It is about a reshaping of infrastructure that has been sitting in the background of daily life for decades.