In short: Hospital pagers survived the Department of Health and Social Care's 2021 phase-out because the paging transmitter in the plant room reaches places that hospital Wi-Fi and public mobile networks do not, such as basements, lifts, theatres and imaging suites. A trust can only retire its crash bleeps once a smartphone gets a reliable signal on every route the emergency team walks, so the replacement project is a coverage project first and an app project second.
Key Takeaways
- 130,000 pagers, one supplier left — In February 2019 DHSC counted around 130,000 NHS pagers costing £6.6 million a year, ordered them out for non-emergency use by the end of 2021, and let trusts keep them for emergencies.
- The bleep reaches rooms the smartphone cannot — Low-frequency on-site paging reaches basements, lift cars and lead-lined imaging rooms where 5 GHz Wi-Fi and macro 4G often drop to nothing.
- Walk the crash routes before switching off — A trust is ready to retire pagers when a test handset receives an emergency alert within seconds at every point on the arrest team's routes, on two independent networks.
In a nutshell
Why do hospitals still use pagers?
Hospitals still use pagers because the bleep is the one device that reliably reaches a doctor anywhere in the building, including the places where smartphones lose signal. In February 2019 the then Health and Social Care Secretary, Matt Hancock, announced that NHS trusts would phase out pagers for non-emergency communication by the end of 2021, with plans and infrastructure in place by September 2020. The DHSC announcement put the NHS estate at around 130,000 pagers costing £6.6 million a year, and noted that the NHS used more than one in ten of the world's remaining pagers.
The same announcement contained the exception that explains why many hospitals still run a paging system today: trusts could keep pagers "for emergency situations, such as when wifi fails or when other forms of communication are unavailable". The cardiac arrest team, the trauma call, the obstetric emergency and the major incident cascade all fall into that category. Those are also the calls where a missed or late message costs most, so clinical safety leads have been understandably reluctant to move them onto a smartphone that drops out in the lift.
Routine bleeping has largely moved to apps in many trusts. The 2017 West Suffolk NHS Foundation Trust pilot of Medic Bleep, which DHSC cited, saved junior doctors 48 minutes per shift and nurses 21 minutes on average, and two-way messaging lets a ward nurse say why they are calling and how urgent it is. Those gains are real. The emergency layer is the part that has stayed on pagers.
Why is replacing hospital pagers harder than it looks?
Replacing hospital pagers is harder than buying an app because the pager and the smartphone sit on very different radio networks. An on-site paging system is a one-way broadcast from a transmitter, usually in the VHF or UHF bands, at frequencies well below Wi-Fi and most mobile spectrum. Low frequencies pass through concrete floors and masonry walls far better than high ones, and a broadcast needs no handshake, so the pager receives the message wherever enough signal arrives. The pager also never has to transmit anything back, which is why its battery lasts weeks.
A smartphone app needs a two-way data connection. It must hold an association with a Wi-Fi access point or a mobile cell, keep that connection alive as the clinician walks, and get an acknowledgement back to the server. Hospital Wi-Fi runs at 2.4 GHz and 5 GHz; the public 4G and 5G networks indoors depend on whatever signal leaks in from masts outside. Both lose far more signal through a hospital's walls than a paging transmitter does.
This gap is the reason "rip out the pagers" turned into a five-year project in many trusts. The app is the easy part. The network under it has to work in the same places the pager did, and in a hospital those places include some of the most radio-hostile rooms in any building type.
Where does smartphone signal fail in a hospital?
Smartphone signal fails in a predictable set of hospital spaces, and they overlap uncomfortably with the routes an emergency team uses. Any trust's estates and IT teams will recognise the list:
- Lift cars and lift lobbies, where the arrest team travels between floors with metal on all sides.
- Basements, where pathology, pharmacy, mortuary, plant rooms and often the link corridors between buildings sit below ground.
- Imaging suites, where X-ray and CT rooms are lead-lined and MRI rooms are built as Faraday cages by design.
- Operating theatres and recovery, often deep in the building with heavy shielding and limited Wi-Fi density.
- Stairwells and fire-compartment corridors, where fire doors with steel frames split coverage zones.
- Older wings, such as Victorian pavilion wards with thick masonry and 1960s and 1970s slab-concrete blocks.
Wi-Fi has a second weakness that pagers never had. Most hospital Wi-Fi was designed for data coverage, which tolerates a laptop pausing for a second while it hops between access points. Voice and real-time alerting need a tighter design, with more overlap between access points and fast roaming configured end to end. A handset walking through fire doors and into a lift will often lose its association, and an emergency alert pushed during that gap waits until the phone reconnects. For a crash call, a delay of 30 seconds is long enough to matter.
The public mobile networks do not fill the gap reliably either. Indoor coverage from EE, Vodafone, Three and O2 masts depends on the building's walls and the distance to the nearest site, and few hospitals have an in-building system carrying all of the operators. Where trusts have paid for a distributed antenna system, it has historically been expensive and slow to agree with every operator.
What are the options for replacing a crash bleep?
There are four practical options for replacing a crash bleep, and most trusts will end up combining at least two of them. Each has a different cost and a different failure mode.
Voice-grade Wi-Fi redesign. A trust can resurvey and densify its Wi-Fi to voice grade in the critical areas, with fast roaming tuned for the handsets in use. This builds on the network the trust already owns and suits the wards well. It struggles most in lifts, imaging suites and basements, where access points are hard to place, and it leaves alerting dependent on a single network in unlicensed spectrum that patients and visitors also share.
Neutral host in-building mobile coverage. Small cells or a distributed antenna system carrying all four public operators, built to the operators' Joint Operator Technical Specification (JOTS) for neutral host in-building systems, give every staff phone a mobile signal indoors. This also fixes patient and visitor mobile coverage, which is a frequent complaint in its own right. Its limit for alerting is that the trust does not control the network; operator core outages and congestion are outside its hands.
Private 5G or 4G on shared spectrum. Since 2019 Ofcom has issued shared access licences, including low-power licences in the 3.8 to 4.2 GHz band at £80 per 10 MHz per year. A private network on that spectrum is licensed, so nobody else transmits on it inside the hospital, and the trust sets the priorities. Higher frequencies do not pass through walls better than Wi-Fi, so private 5G does not cure dead zones by itself; it needs small cells placed in the lift shafts, basements and theatre corridors, like any other network. Its advantages are quality of service the trust controls, a second independent path alongside Wi-Fi, and support for 3GPP mission-critical push-to-talk on the same handsets. The trade-off is a new network to run and a supply of devices with the right bands and SIMs.
Keep pagers for the emergency layer. Retaining a slimmed-down paging system for crash, trauma and major incident calls is a legitimate choice. DHSC allowed for it in 2019, and with one UK wide-area paging provider left, the same announcement noted a single device could cost up to £400. The cost is running two systems and two devices per clinician, and losing the two-way acknowledgement that tells the switchboard the team has seen the call.
How should a trust test whether it can switch off its pagers?
A trust can switch off its emergency pagers when it has measured, room by room, that a smartphone receives an emergency alert within an agreed time on every route the response teams use. The test should be specific and repeatable.
- Map the routes. Take the 2222 cardiac arrest, trauma and obstetric emergency call lists and trace every route from the team's usual locations to every clinical area they cover, including lifts and link corridors.
- Walk them with test handsets. Send timed test alerts every few seconds while walking, recording delivery latency and acknowledgement time against location. Repeat at shift changeover and visiting hours, when load peaks.
- Fail one network deliberately. Turn off Wi-Fi on the handset and repeat the walk on the cellular path alone, then the reverse. If a single network failure leaves any part of a route without alerting, the pagers stay.
- Check the clinical system end to end. Switchboard, alerting platform, integration with the nurse call and resuscitation equipment, and the escalation if nobody acknowledges.
- Record the result in the clinical safety case. DCB0160 requires the trust's clinical safety officer to sign off the hazard log for the deployment, and the walk-test data is the evidence that log needs.
This kind of measurement turns a debate about trust in technology into a coverage map with red patches on it. Each red patch then has a cost attached: an access point, a small cell, or a decision to keep a pager for that team.
What does a pager replacement actually cost?
The handsets and the app are rarely the expensive part of a hospital pager replacement; coverage in the hard rooms is. DHSC's own figures put the pager estate at about £50 per device per year, which makes the paging contract look cheap beside a new in-building network. A like-for-like comparison against the pager budget alone will rarely justify the project.
The case looks different when the trust counts what the same coverage also delivers. A licensed, trust-controlled cellular layer in the basements and corridors also carries electronic patient record sessions on the move, equipment tracking tags, porter and patient-flow apps, and staff voice. A neutral host layer fixes mobile signal for patients and visitors, which shows up in complaints and Friends and Family Test comments. Pagers come off the books as a consequence of building that network, rather than as its sole justification.
For a trust starting this work, we would suggest beginning with the walk test above on the three busiest emergency routes in the main building. It takes a few days with a test handset and a floor plan, and it produces the map that decides whether the answer is more Wi-Fi, a small-cell network, or keeping the bleep for another year.