A guide to the PSTN switch off - Cobweb

A guide to the PSTN switch off

We’ve put together a quick guide to help you understand what the switch off means for your business, and the options for your next steps.

What's inside?

In 2019, it was announced that the Integrated Service Digital Network (ISDN) and Public Switched Telephone Network (PSTN) would be switched off in December 2025.

With 6 years until that date, there was no major rush from businesses to change. Fast forward three years and the more forward-thinking businesses are now starting to make their contingency plans – because as of 2023 - customers will no longer be able to purchase new lines, with the complete switch off taking place in 2025.

Our quick guide will help you understand what the switch-off means for your business and the options for your next steps.

  • A brief introduction to the PSTN and ISDN networks, and what the 2025 switch of means for your business
  • Key dates for your diary
  • An introduction to VOIP (Voice over Internet Protocol) systems - the replacement service for the legacy networks.
  • What do next, and where to get started with updating your phone systems.