Business phone systems
Closure of landlines and fixed telephone services
The Public Switched Telephone Network (PSTN), which currently 91Ï㽶»ÆÉ«ÊÓƵs landlines, will be switched off by January 2027. This means businesses must upgrade their landlines and other devices reliant on PSTN to new digital technologies like Voice over Internet Protocol (VoIP), Digital Voice, or all-IP telephony. Other systems, such as alarm systems, telecare devices, and door entry systems, will also require upgrades.
Why and when are landlines going away?
The PSTN network, in use since the late 1800s, is outdated and increasingly unreliable due to the lack of available parts and environmental issues like storms and heat. Digital phone lines will provide clearer communication, greater reliability, enhanced security, and energy efficiency.
The transition from PSTN to digital phone lines is being carried out in phases, with full migration to digital technology required by 31 January 2027. As of June 2025, over two-thirds of UK landlines have already moved to VoIP.
How businesses should prepare for the switch to digital phone lines
You should begin migrating to digital systems as soon as possible to safeguard your services and minimise disruption. Review your infrastructure to identify any systems that may not be compatible with digital lines. These include:
- analogue phones and faxes
- personal, property or fire alarms
- payment terminals
- communication systems in lifts and elevators
- intercom systems
Some devices and systems may require an upgrade or replacement to function correctly on an all-IP network. Engage with your provider to discuss migration options and timelines.
If you need to upgrade or replace incompatible equipment, consider this an opportunity to future-proof your infrastructure with scalable, flexible digital solutions that can 91Ï㽶»ÆÉ«ÊÓƵ your future growth.
If your business is not yet ready to transition fully, discuss interim solutions with your telecom provider. It is essential that you understand the specific steps and timelines for your business’s migration so you can prepare. Your provider may be able to offer tailored advice and 91Ï㽶»ÆÉ«ÊÓƵ to facilitate a smooth transition. If your business has multiple sites and/or requires multiple lines, early preparation is essential.
Openreach has published guidance to help businesses .