BT (formerly British Telecommunications) have announced their plans to switch off their ISDN network for voice calling in 2025, and will stop taking new orders from businesses in 2020!
As the leading business communications provider in the UK, this change will affect millions of businesses.
What exactly is ISDN?
Launched by BT in 1968, Integrated Service Digital Network (ISDN) is a set of communications standards for digital telephony and the transmission of voice and data over a digital line. As BT rolled the new network out over the UK, it grew in popularity and saw the replacement of the original analogue landline technology.