Fire Lite 5024UD Phone Line Fault

Just recently, 2 phone line faults have popped up on the panel. I don’t have any connected, so why is this happening? Is there something I need to disable in the settings? Thanks for any help.

Its probably because the panel attemted to test them, but it didnt get a reply from the central station reciver, so to get rid of those you should either disable phone line supervision or reporting.

What happen to the phone line?