what is The PSTN & ISDN Switch Off?
In 2017, Openreach announced that the Public Switched Telephone Network (PSTN) would be phased out by December 2025. However, this deadline has since been extended to January 31, 2027.
​
By this new deadline, all businesses must transition to Voice over Internet Protocol (VoIP) systems in order to continue making calls and to ensure compatibility with other modern communication systems. While the official cut-off date is set for 2027, Openreach has begun gradually phasing out PSTN and ISDN services across the country. This means some businesses may face disruption and be required to switch to newer technologies before the final deadline.
FAQ
Simply put, an ISDN line is the main carrier and most popular way of making phone calls. The Integrated Services Digital Network (ISDN) allows you make phone calls using digital transmission.
Why is ISDN being switched off?
Up until the 2000’s, ISDN was the highest standard of fast digital connections, this have been replaced with Broadband connection which have taken connection speeds to a higher level.
​
Moving away from ISDN to VoIP (Voice over Internet Protocol) allows up to date technology to be used and is a service built for the future.
What are your options?
Telecommunications is now using VoIP and SIP (Session Initiation Protocol) to carry phone calls around the world. This needs nothing other than an active internet connection.
​
Making the switch not only makes calling for cheaper but also allows for an easier setup as there are no physical phone lines to install.
Can I pay to keep my ISDN live?
No.
​
All ISDN services will be switched off so all current lines must be moved to newer alternatives.
As the big switch approaches, businesses need to prepare for significant changes that will impact not just phone systems, but all analogue lines across the UK. This transition affects a wide range of devices connected to these lines, including alarms, CCTV systems, and payment terminals, among others.
​
If you're currently using older broadband services like FTTC or ADSL, which rely on analogue telephone lines, it's essential to upgrade to a more modern solution, such as SoGEA or FTTP. These next-generation services provide more secure, reliable, and future-proof connectivity. For our existing customers, Change Connect will be reaching out soon to assist with transitioning from these soon-to-be obsolete services, ensuring a seamless upgrade to a more robust and secure solution.