Warden call systems in sheltered and extra care housing were built for analogue phone lines. Those lines are being switched off, with the switchover due to complete by January 2027. This guide is for housing providers and councils who own grouped schemes. It explains what is at risk, what the standards say, how to choose between adapting and replacing, and how to plan the work.
Key points
- Analogue warden call signals to the monitoring centre using tones, which carry a risk of failure on digital lines.
- The switchover is due to complete for all providers by January 2027, and lines are being moved in stages before then.
- BS 8521-2 is the standard for the digital link between a grouped scheme and the alarm receiving centre.
- Audit every scheme, rank by risk, pilot, then roll out.
- Tell your telephone provider in writing which lines carry alarms.
What is a warden call system?
A warden call system is the alarm system built into a sheltered, retirement or extra care housing scheme. Each flat has a speech unit, pull cords and often a pendant. A call goes to the scheme manager when they are on site and to a monitoring centre when they are not. Industry guidance calls this a grouped alarm system, because many residents raise alarms across one shared communication path, with functions such as queuing and prioritising calls and routing them off site out of hours. It is different from a dispersed alarm, which is a stand-alone unit in one home.
Will an analogue warden call system work after the digital switchover?
It may not work reliably, and that is the risk to plan for. The government’s Telecare National Action Plan says the digital phone switchover will be complete for all providers by January 2027, and warns of a risk that some analogue telecare devices will not perform reliably on digital networks.
The reason is technical but simple. Analogue alarm systems send information about the alarm, such as which flat and what type of call, as sequences of audible tones down the phone line. Industry guidance explains that the obligations on communications providers to support tone-based signalling have been removed and that tone signalling carries a risk of failure on digital networks. Calls inside the building may carry on as before. The call that leaves the building, to the monitoring centre at night, is the one at risk.
Housing providers are responding. Your Housing Group’s market engagement notice says its existing analogue systems need a longer-term digital replacement strategy following the switchover, and that it wants to identify available solutions, assess their suitability and understand the investment involved.
What is the difference between analogue and digital warden call?
| Analogue warden call | Digital warden call | |
|---|---|---|
| How alarms leave the building | Tones over a traditional phone line | Data over broadband, the mobile network or both |
| Calls at once | One call at a time on the line; others queue | Designed to handle alarm data and speech as separate digital streams |
| Fault monitoring | Faults are often found when a call fails or at a routine test | Regular heartbeat messages can report equipment health |
| Power | The phone line carries its own low voltage power | Routers and signalling equipment need mains power and backup |
| Standards | Earlier analogue protocol | BS 8521-2 for the link between a grouped scheme and the alarm receiving centre |
| What it can connect to | Usually limited to the manufacturer’s own devices | Scope to connect door entry, sensors and resident devices, depending on the system |
What standards apply to digital warden call?
BS 8521-2:2020 is the British Standard that defines the digital protocol for communication between an alarm receiving centre and a grouped living scheme. Its purpose is interoperability: a scheme from one manufacturer should be able to talk to a monitoring platform from another. The application guidance that supports it covers how schemes connect, by broadband or mobile network, and the power backup each needs. It also covers heartbeat messages to monitor equipment health, encryption to protect personal data, testing and commissioning checklists, engineer training, and a register showing where interoperability between schemes and monitoring platforms has been tested.
In a specification, ask suppliers to state their conformance with BS 8521-2 and to show where their equipment appears on that register against your monitoring centre’s platform.
Should you replace the system or adapt it?
There are three broad routes, and the right one depends on the age and condition of what you have.
- Adapt the signalling. Keep the equipment in the flats and change how the scheme connects to the monitoring centre. This is the least disruptive route, but only where the manufacturer supports a digital path and the in-flat equipment has years of life left.
- Replace like for like with digital. New digital equipment using the existing cable routes where they are sound. Residents see familiar speech units and pull cords.
- Rethink the scheme. Use the replacement to change what residents get, such as door entry on the same system, sensors, or individual devices that go with the resident. This needs the most consultation and the best connectivity.
Whichever route you take, do not migrate the phone line first and find out afterwards. Under a Charter agreed with government, communications providers have committed not to migrate a telecare user without confirmation that a compatible and functioning telecare solution is in place. That protection depends on the provider knowing the line carries alarms, so tell them in writing.
What affects the cost of replacing warden call?
We do not publish prices, because every scheme is different. The factors that move the cost are consistent:
- the number of flats and communal areas, and how many schemes are in the programme;
- the condition of existing cabling and whether it can be reused;
- the building itself: age, construction, asbestos and any listed status;
- connectivity: whether broadband and mobile signal are good enough, and what backup power is needed;
- what else is connected, such as door entry, smoke detection and access control;
- monitoring centre compatibility and any platform changes needed at their end;
- how residents are supported during the work, including temporary cover;
- maintenance, licences and support over the life of the system.
Ask for whole life costs over the contract term, not only the installation price.
How do you plan a warden call replacement programme?
Start with an audit of every scheme: system age, manufacturer support, how it connects, faults in the past year and resident numbers. Rank schemes by risk, with analogue-only signalling and unsupported equipment first. Pilot on one or two schemes to test the equipment, the monitoring link and the resident experience before committing the estate. Keep residents informed throughout; they need to know what changes, when engineers will be in their homes and how to call for help during the work.
Power and connectivity need their own line in the plan. Digital lines rely on powered equipment in the building, and telephone providers are only expected to keep access to emergency calls going for a minimum of one hour in a power cut. A scheme alarm system needs more thought than that: which equipment is on backup power, for how long, and who tests it. That makes the system part of your IT and network estate.
If your organisation also runs registered care homes, the same switchover affects nurse call diallers and alarm lines there: see what care homes need to check. Our nurse call systems page and nurse call buyer’s guide cover that side, and our technology enabled care page sets warden call in the wider picture alongside telecare equipment.
How can Altus help?
We supply or manage the move from analogue to digital warden call. That can mean surveying your schemes and ranking them by risk, writing the specification, managing the installation, or advising while you run your own procurement.
Warden call switchover checklist
- Have we listed every scheme, its warden call system, age and manufacturer support status?
- Do we know how each scheme signals to the monitoring centre today?
- Has our telephone provider been told in writing which lines carry alarms?
- Has each supplier confirmed in writing how its system works on a digital line?
- Is the monitoring centre’s platform tested with the digital equipment we plan to use?
- Is backup power in place for routers and signalling equipment, and who tests it?
- Have residents been told what is changing and how to call for help during the work?
- Is every scheme tested end to end with the monitoring centre after any change?
Frequently asked questions
Will my warden call system work after the digital switchover?
It may not work reliably. Analogue warden call systems send alarm information as tones over a phone line, and tone signalling carries a risk of failure on digital networks. Calls inside the building may be unaffected, but calls to the monitoring centre are at risk. Ask your supplier to confirm in writing.
When is the digital phone switchover?
The government’s Telecare National Action Plan says the switchover will be complete for all providers by January 2027. Telephone providers are moving customers in stages before then, so a scheme’s line can change earlier. Tell your provider in writing which lines carry warden call or telecare alarms so they are flagged before migration.
What is BS 8521-2?
BS 8521-2:2020 is the British Standard that defines the digital protocol used between a grouped housing scheme’s alarm system and an alarm receiving centre. It exists so that schemes and monitoring platforms from different manufacturers can work together. Ask suppliers to state conformance and to show tested interoperability with your monitoring centre.
How much does a digital warden call system cost?
Cost depends on the number of flats and schemes, whether cabling can be reused, the age and construction of the building, broadband and backup power, links to door entry and smoke detection, monitoring centre changes, and ongoing maintenance and licences. Ask suppliers for whole life costs over the contract, not only installation.
Can an analogue warden call system be upgraded instead of replaced?
Sometimes. If the manufacturer supports a digital signalling path and the equipment in the flats has years of life left, changing how the scheme connects to the monitoring centre can be enough. If parts are scarce or the system is unsupported, replacement on a planned timetable is usually the safer choice.
If you would like help auditing your schemes or planning the move from analogue to digital warden call, we can survey your estate and give you a ranked, practical plan. Request a scheme survey.