Our home phone lline has no dial tone.
Calls to the number from my mobile result in an engaged tone.
I have unplugged home phones and tested them independently with no luck.
My VDSL broadband connection is still working.
Is the phone light on the front of your modem red/green/not on when the phone is plugged into the modem?
None of our phones are plugged into the modem.
They are all plugged into wall sockets.
Is your broadband plan one that includes voice calling over broadband, or has phone as a traditional service i.e. using the socket?