Updated: Jan 26, 2020
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What’s all this talk about BT switching off its ISDN phone service?
BT released a statement in 2015 that it would stop taking new ISDN orders in 2020, with a view to switching-off and deactivating its ISDN network completely in 2025.
So, if you’re determined to get an ISDN phone line installed, you’d better do it quick, and you’d better make sure you won’t have any need for it after 2025!
Let’s wind back a bit. What exactly is ISDN?
ISDN (short for Integrated Service Digital Network) is a circuit-switched telephone network system that allows both voice and data services to be delivered over digital lines simultaneously. It was launched by BT in 1986 as a means to migrate outdated landline technology to digital.
When it launched, businesses got excited about ISDN because it could support both an analogue phone line and early video-conferencing systems. At the time, it also offered the fastest internet access available (128 kbps). Read more