Question: are isdn lines being phased out?
Answer: 2020) BT announced in 2015-16 that from 2020 you will no longer be able to purchase ISDN lines with a target date of 2025 for a switch off date. They have now revised that date and have stated that you can purchase ISDN lines up to September 2023. There will be a forced migration phase between April and December 2025.