Nearly Half of UK Landline Users Still Confused as Business PSTN Deadline Looms

The United Kingdom has been retiring its analogue telephone network for the better part of a decade, and for most of that time the deadline has felt comfortably distant. It is not distant any more. The legacy Public Switched Telephone Network — the copper-based PSTN that has carried British voice calls since the 1980s, and the Wholesale Line Rental products Openreach sells on top of it — is due to be switched off on 31 January 2027. That is roughly seventeen months from today, 26 August 2026, and for businesses it is not a soft target or an aspiration. It is a hard date.

New survey evidence published this week suggests a large part of the country has not registered that. A OnePoll survey of 2,000 UK adults with a landline, commissioned by the internet service provider CommunityFibre, found that 45% of respondents are still unclear about what the switch-off actually means for them. Almost half — 48% — did not know that the change could affect devices in a building other than telephones: intruder alarms, card payment terminals, lift emergency lines and telecare pendants all commonly ride on the same analogue pair. Only 12% had checked whether their equipment would still work afterwards, and among those yet to switch, 53% had taken no action at all to prepare. Set that against Openreach’s own operational data — around 1.5 million UK lines still on legacy copper at the end of July 2026, including roughly 350,000 business premises — and the shape of the problem becomes clear. This article sets out what the 31 January 2027 deadline actually is, why businesses face a materially stricter version of it than households do, which devices are the ones that break, and what a UK small or medium-sized business should have documented before the migration window narrows.

What the survey actually found

The research was carried out by OnePoll on behalf of CommunityFibre and sampled 2,000 UK adults who have a landline — which is the relevant population, because a household or business with no landline at all has nothing to migrate. Within that group, 45% said they remain unclear about what the switch-off of the ageing PSTN means for them. That is not the same as never having heard of it. Awareness campaigns from providers, Ofcom and the industry have been running for years, and the phrase “digital switchover” has enough public currency that most people recognise it. The gap the survey exposes is between recognition and comprehension: people know something is happening to phone lines, and do not know what it requires of them.

The more consequential finding is the second one. Forty-eight per cent of respondents were unaware that the switch-off could affect other devices in a building beyond the telephone itself. This is the finding that matters most for businesses, because a domestic landline user who does nothing until their provider migrates them will typically discover the change as a mild inconvenience — a handset that needs plugging into a different socket. A business that does nothing may discover it as a monitored intruder alarm that stops signalling to its alarm receiving centre, a lift emergency telephone that no longer connects, or a chip-and-PIN terminal that cannot dial for authorisation on a Saturday morning. The same analogue pair that carries voice has, for thirty years, been the cheapest and most reliable way to give a piece of equipment a route out of the building, and a very large amount of British commercial estate was wired on that assumption.

The third and fourth findings describe the behavioural gap. Only 12% of those surveyed have actually checked whether their equipment will still work after the switch-off — an audit that, for most small businesses, is an afternoon’s work with a torch and a list. And 53% of those yet to switch reported taking no action whatsoever to prepare. Peter Rampling of CommunityFibre, commenting on the results, described the move from analogue to digital phone services as a nationwide change affecting millions of households and businesses, and urged people to check what options are available to them rather than assume their existing provider is offering the best migration path. That last clause is worth sitting with. Migration is a moment at which the incumbent supplier has an unusual amount of leverage and the customer has an unusual amount of choice, and the default — accepting whatever the current provider proposes — is not automatically the right commercial answer.

How the programme reached 31 January 2027

The switch-off is not a sudden decision. It is the end point of a long, publicly signposted engineering programme in which Openreach withdraws its Wholesale Line Rental products and BT retires the underlying PSTN, replacing analogue voice with voice carried over IP — either over a fibre or broadband connection directly, or through an Analogue Terminal Adapter that presents a familiar RJ11 socket to existing equipment. The timeline below sets out the milestones that got the industry here and the ones that still lie ahead.

The numbers behind the deadline

It is worth laying the figures side by side, because the survey percentages and the Openreach line counts describe two halves of the same problem: a large residual estate, and a population that has not yet engaged with what moving it involves. The bars below combine the headline survey findings with two ratios derived directly from Openreach’s reported line counts — the month-on-month reduction between June and July 2026, and the business share of the lines that remain.

Two of those bars deserve a note on how they were calculated. The 21% figure is the reduction from approximately 1.9 million lines in June 2026 to approximately 1.5 million at the end of July 2026 — around 400,000 lines migrated in a month, which is a genuinely rapid clearance rate. The 23% figure is the roughly 350,000 business premises expressed as a proportion of the 1.5 million lines still on copper. Businesses are therefore a minority of the residual estate by count, but they carry a heavily disproportionate share of the risk, because a business premises is far more likely than a home to have a monitored alarm, a lift, a payment terminal or a door entry system hanging off the same line.

The awareness gap in one number

If the entire survey had to be reduced to a single figure, it would be the 45% who remain unclear about what the switch-off means. That number is doing a lot of work. It is not measuring ignorance of the programme — the switchover has been publicised for years, and the surveyed population all have landlines and therefore all have providers who have been writing to them. It is measuring the distance between having heard of something and knowing what it obliges you to do. In a business context that distance is where risk accumulates, because the tasks that migration requires — identifying every device on an analogue line, establishing who owns each one, confirming with each supplier whether the device is IP-capable — are exactly the tasks that never get assigned to anybody in particular.

The corollary is the 12% who have checked their equipment. Read together, those two numbers describe a country in which roughly one landline user in eight has done the one piece of work that actually resolves the uncertainty. Checking is not difficult. For a single-site business it means walking the building, listing everything plugged into a telephone socket or wired into a distribution point, and asking each supplier one question: does this still work when the analogue line goes away, and if not, what replaces it? The reason it does not get done is not difficulty. It is that the deadline has moved before, the consequences are invisible until they are not, and nobody owns the task.

Where the switch-off actually bites in a UK business

The following assessment reflects what typically sits on analogue lines in UK commercial premises and how exposed each category is when the PSTN is retired. The ratings are an editorial judgement of migration risk — how likely the device is to fail, how serious the failure is, and how much lead time replacement usually needs — rather than a vendor statement about any specific product. Every one of these categories falls inside the 48% blind spot the survey identified.

The pattern in that grid is consistent and worth stating plainly: the ordinary telephone is the least of the problem. In most cases the handset upgrade is genuinely simple, and amounts to connecting the existing phone into an Analogue Terminal Adapter or into the telephone port on a broadband router rather than directly into the wall socket. The handset does not need replacing; the thing it plugs into does. Equipment such as alarms and card machines is different, because it often needs separate assessment or outright replacement — and that assessment has to come from the company that maintains it, which means a conversation, a site visit and a lead time.

There is a second-order issue that the device list does not capture. An analogue line drew its power from the exchange, which is why a corded phone kept working in a power cut. A digital voice service depends on equipment inside your building — a router, an ATA, a switch — and that equipment depends on mains power. Any device whose value lies in working during an emergency, which describes lifts, fire alarms, intruder alarms and telecare almost by definition, therefore needs its power resilience reconsidered at the same time as its connectivity. Battery backup for the router and the ATA is a small line item that is very easy to leave out of a migration plan and very awkward to explain afterwards.

What migration typically costs a UK business

Migration cost varies enormously with what is actually connected, and any figure quoted in the abstract is a planning aid rather than a quotation. The bands below are indicative ranges for budgeting purposes, built around the structure most UK SMEs will recognise — the connectivity itself, the adapters or handsets, and the specialist work on alarms, lifts and payment terminals that has to be done by the incumbent maintainer. They are deliberately expressed as ranges because the specialist element dominates the total and is the part nobody can price without a site survey.

Two observations about that table matter more than the numbers in it. The first is that the cost curve is driven by the specialist column, not the telephony column: replacing handsets and lines is broadly commodity work with competitive pricing, while re-engineering alarm signalling or a lift autodialler is specialist work with a limited supplier pool. The second is that the ongoing cost usually falls. A business paying line rental on several analogue lines it barely uses, plus separate rental on dedicated alarm and lift lines, is frequently paying more per month than the digital service that replaces the lot. Migration is a capital exercise that tends to reduce the run rate — which is why treating it purely as a cost to defer is a poor reading of the economics.

Waiting versus planning: two ways to meet the same deadline

Every business on a legacy line will migrate before 31 January 2027, or will find out the hard way that it has not. The variable is not whether the change happens but who controls the timing, the supplier choice and the disruption. The two columns below describe the same destination reached under very different conditions.

At a glance

How this connects to the rest of the UK telecoms picture

The switch-off is not happening in isolation, and readers following the connectivity and voice market will recognise several threads converging. The ownership of the platforms that will carry post-PSTN business voice is itself in motion: our coverage of the Gamma Communications takeover talks examined what a change of control at the wholesale layer means for businesses whose phone systems are delivered through a reseller, which is exactly the position many companies will find themselves in immediately after migrating. On the access side, the fibre capacity that digital voice rides on continues to expand, as set out in our report on the Openreach XGS-PON rollout — the same infrastructure programme that makes the PSTN redundant in the first place.

The security dimension travels with it. Moving voice and device signalling onto an IP network means those devices join the estate that has to be patched, monitored and segmented, a point underlined by our analysis of the Entra ID maximum-severity flaw and of the Sleepwalker Windows backdoor. An alarm panel that used to be an isolated analogue endpoint becomes, after migration, a network-attached device with firmware. And the governance layer keeps moving too — the NCSC’s agentic AI safety guidance is part of the same broader expectation that UK organisations can describe, in writing, what is connected to their networks and who is responsible for it. The PSTN migration is, among other things, an unusually good excuse to produce that inventory.

Frequently asked questions

The practical bottom line

The CommunityFibre survey is a useful piece of evidence not because 45% is a shocking number but because it is an unsurprising one. Long-dated infrastructure deadlines with a history of being moved do not generate urgency, and the consequences of this one are invisible right up until the moment they are not. The Openreach figures point the same way from the other direction: around 1.5 million lines still on copper at the end of July 2026, roughly 350,000 of them business premises, with a hard date seventeen months out.

For a UK business the honest summary is short. The telephone part of this is easy and largely solved by an adapter. The alarm, lift, payment terminal and telecare part is where the work and the risk sit, it depends on third parties with finite capacity, and it cannot be compressed into the final quarter before the deadline. Doing the inventory now converts a hard external deadline into a scheduled internal project — and, more often than not, into a lower monthly bill at the end of it. Doing it in January 2027 converts it into an incident.

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