The Big PSTN Switch Off

The UK’s telephone network is going digital. The Public Switched Telephone Network (PSTN) is scheduled to be switched off on 31st December 2025, and traditional landline connections will be replaced with Voice over Internet Protocol (VoIP) services.

The PSTN is the analogue copper cable telephone network that’s been in use since 1876. As well as landline services, the PSTN also provides standard ADSL and fibre-to-the-cabinet (FTTC) broadband services via fibre optic cables.

The replacement, VoIP, is entirely digital and uses your internet connection to transmit voice calls and data. It’s the same tech that’s used for messaging and video call services like Skype and WhatsApp.