- Many telecare alarms, burglar alarms and care-line devices were designed to dial out over the analogue line, so removing or changing the line can stop them working without notice.
- Ofcom requires providers to identify customers who depend on their landline and to protect their ability to contact emergency services through the digital switchover.
- A digital voice line relies on mains power and usually stops working in a power cut unless a battery backup or alternative arrangement is in place.
- The analogue PSTN is being retired as part of the all-IP migration completing in 2027, so equipment dependent on it will need testing or replacement regardless.
- Ofcom rules give customers protections around contract terms and switching, including information about what happens to services when a line is removed or changed.
Before cancelling, check what depends on the line: alarm systems, telecare alerts, power-cut 999 resilience and any elderly relative who relies on it. Confirm alternatives are in place first.
Last reviewed: June 2026
Why removing a landline needs care
Cancelling a landline can look like an easy way to trim a monthly bill, but the line often does more work than its occasional use suggests. A range of equipment and arrangements quietly depend on it, and removing it can disable safety systems or leave a vulnerable person without a reliable way to call for help. The goal here is to make those dependencies visible before you act, so that nothing important is lost the moment the line is switched off.
The most common mistake is treating the landline purely as a voice service. In many homes it also carries alarm signals, telecare alerts and care-line connections that the household may rarely think about. Because these run quietly in the background, they are easy to overlook until they fail. Working through a dependency checklist first turns a risky surprise into a planned change.
It also helps to separate two related but distinct decisions. One is cancelling the landline service entirely so the property has no fixed voice line at all. The other is the wider migration from the old analogue network to digital voice, which is happening across the country whether or not a household chooses to cancel. Equipment that only ever worked because a constant analogue signal was present can be affected by either change, so a household reviewing its bill is, in practice, also reviewing its readiness for the switchover. Treating the two together avoids fixing one problem while leaving the other unaddressed.
What depends on your landline
Burglar and fire alarms are a frequent example. Older monitored alarm systems were built to dial out to a monitoring centre over the analogue line. If the line is removed, the alarm may lose its ability to raise the alert it was installed to send. The bell may still sound locally, but the monitored element can fail silently, which is exactly the kind of failure you do not want to discover during a break-in.
Telecare and personal alarm systems are even more critical. A pendant or pull-cord that connects an older or vulnerable person to a monitoring service often relies on the line to place its call. Removing the landline without arranging a replacement can cut that lifeline. Lift autodiallers, care-line phones and some medical alert devices fall into the same category. Each was designed around the assumption that a working analogue line would always be there.
Less obvious dependencies are worth a mental sweep as well. Some heating, metering and assistive devices were configured years ago to send readings or alerts down the line, and a household that has changed hands may not know what the previous occupant installed. Door-entry systems in flats, certain payment terminals in home businesses, and older fax or franking machines can all sit on the same line. A practical step is to walk the property and trace anything plugged into a phone socket, then ask what that device does when the line is gone. If the answer is uncertain, the device's manufacturer or the firm that monitors it can confirm whether it depends on the analogue signal or can move to a digital or mobile path.
Landline dependency checklist before cancelling
The checklist below covers the items most often connected to a landline. Each one should be confirmed as either not present or safely migrated to an alternative before you cancel.
| Item to check | Risk if overlooked | Action before cancelling |
|---|---|---|
| Telecare or pendant alarm | Lifeline call fails to connect | Confirm a digital or mobile-based replacement |
| Monitored burglar or fire alarm | Alert not sent to monitoring centre | Ask installer about a non-line signalling path |
| Power-cut 999 ability | No way to call help in an outage | Ensure a charged mobile or battery backup |
| Elderly or vulnerable relative | Loss of familiar contact method | Agree an alternative they can use |
| Care-line or lift autodialler | Emergency line stops dialling out | Arrange compliant replacement signalling |
For lifts in particular, the autodialler that lets a trapped passenger speak to a rescue service is a safety feature held to a recognised standard, BS EN 81-28, and a building manager removing or changing the line that serves it should arrange a compliant replacement path rather than leaving the lift phone silent. The same care-before-cancellation logic applies to every row in the table: confirm the replacement is live and tested first, then end the old line.
Power cuts and emergency calls
Power resilience deserves separate attention. The traditional analogue line carried power from the exchange and usually kept working when the mains failed. As services move to digital voice under the all-IP migration completing in 2027, the line depends on your router and mains power, so it goes dead in an outage without a backup. If you remove the landline entirely and rely on a single mobile, an uncharged handset during a long power cut could leave the home with no way to call 999.
Ofcom has set clear expectations here. Providers must identify customers who depend on their landline and offer at least one solution that supports emergency calling for a minimum period during a power cut. The mechanism is usually a battery backup unit that keeps a connected phone working for a defined period, or an alternative such as a mobile arranged for households with no signal of their own. If your household includes anyone who could not quickly use a mobile in an emergency, this protection is a key reason to keep a resilient arrangement rather than simply cancelling.
Alternatives and the cancellation process
If your checks confirm that the line can safely go, the next step is arranging alternatives. For alarms and telecare, the equipment provider or your local authority care service can usually supply a digital or mobile-based device that no longer needs the analogue line. For voice calls, a mobile or an internet-based calling service can replace the landline, provided coverage and power-cut resilience are addressed. The aim is to have each replacement working before the old line is switched off, not afterwards.
On the cancellation itself, contact your provider, confirm any notice period or contract terms, and ask what happens to your number and any bundled broadband. A frequent complication is that broadband and the phone line are sold together, so cancelling the voice element does not always cancel the connection that carries your internet, and removing the wrong part can leave you without broadband. Ofcom rules give customers protections around contract information and switching, and your provider should explain the impact of removing the line. Keep a record of the request and the date the service will end, and tell anyone who relies on the number that it is changing.
Keeping the number and the broadband working
Many households assume that cancelling the landline means losing the number that friends, family and services have used for years. In practice the number can often be retained, either by keeping a voice service in a digital form or, where the provider supports it, by porting the number to a new service. The decision is easier to make calmly before cancellation than to unpick afterwards, because once a number is given up it may not be recoverable. Confirming with the provider whether the number can be ported, and to what kind of service, is therefore part of the same conversation as ending the line.
The broadband relationship deserves the same scrutiny. On modern full-fibre and single-order broadband products the internet no longer needs a separate phone line, so it is possible to keep fast broadband while dropping voice. On older copper-based setups, however, the broadband may still ride on the same physical line, and a poorly worded cancellation can take both away. Asking the provider in plain terms which product you are on, whether broadband survives the change, and whether any new equipment is needed protects against an outage that is far more disruptive than the small saving cancellation was meant to deliver.
Frequently Asked Questions
What should I check before cancelling my landline?
Check for any equipment or arrangement that depends on the line, including telecare alarms, monitored burglar or fire alarms, care-line phones and lift autodiallers. Confirm how you will call 999 during a power cut, and consider any elderly or vulnerable person who relies on the line. Walk the property to trace anything plugged into a phone socket, and arrange replacements before cancelling.
Will my alarm system work without a landline?
It depends on how the alarm signals out. Older monitored systems built to dial over the analogue line may stop sending alerts to the monitoring centre once the line is removed. The local bell may still sound, but the monitored element can fail silently. Ask your alarm installer whether the system can use a non-line signalling path, and arrange that before cancelling.
What happens to my telecare alarm if I cancel my landline?
A telecare or pendant alarm that relies on the analogue line may be unable to place its call once the line is gone, which can cut the user off from their monitoring service. Contact the telecare provider or local authority care service to arrange a digital or mobile-based replacement before any cancellation takes effect, and test the new device before relying on it.
Can I call 999 without a landline?
Yes, you can usually call 999 from a mobile where there is coverage, and in some cases over another available network. The risk is a power cut or an area with no mobile signal, where a resilient landline is more dependable. Ensure a charged mobile or a battery backup is available for emergencies, especially where someone in the home could not quickly reach or use a mobile.
What is the process to cancel a landline?
Contact your provider, check any notice period and contract terms, and ask what happens to your phone number and any bundled broadband. Confirm whether the number can be kept or ported, confirm the date the service ends and keep a record of the request. Ofcom rules require providers to give clear information about switching and the effect of removing the line.
