The big PSTN switch-off

Consumers and businesses who are still using analogue - otherwise known as the Public Switched Telephone Network (PSTN) - are being advised to make the move to digital technology as soon as possible.

Communications providers in the UK are aiming to replace the copper cable telephone network, in service since 1876, with Voice over Internet Protocol (VoIP) by the end of January 2027.

This means that any devices that rely on PSTN, in particular older landline phones and internet connections, will no longer work after the switch off.

This transition to modern digital technology is regarded as essential for improving communication and aims to be as straightforward as possible.

What does this mean at home?

Once a home phone service is moved from PSTN to VoIP, the phone will generally work in the same way as it always has, but will need to be plugged into a broadband router instead of the phone socket on your wall.

What if I want to keep a separate landline?

The move to digital may seem daunting to those who are used to the traditional service, however reassurance has been provided that no one will be forced to lose their landline. There will be an option for a ‘landline only’ service should a customer not wish to purchase a general internet connection.

Ofcom advises that providers are expected to offer a range of options for people who don't want to take out a high-speed broadband package.

You can find out more information here.

What does this mean for businesses?

Businesses are advised to make a move to full digital technology by 31st December 2025 to avoid any disruption.

If broadband is reliant on a traditional phone line, this will need to be upgraded as the Integrated Services Digital Network (ISDN) will stop working when the PTSN switch-off happens.

BT Business provides guidance here.

What if there's a power cut?

For most customers, telecoms companies recommend using a mobile phone as a backup in case of a power cut. If you don’t have a mobile, or live somewhere where there’s no signal, your landline provider should offer a solution such as a battery back-up unit. This will mean that you can still make emergency calls during a power cut.

The government website provides more useful information here. However, the upgrade of telephone lines across the UK is not a government initiative, therefore anyone with concerns or queries should contact their own service provider.

Not all analogue phone services will be switched off by 2027. Depending on your communications provider, you may not be required to move to digital voice services by then, but you should check and note the date to make sure you organise what you need to in time to stay connected.