Hi Helsbells666,
A warm welcome and thanks for posting on our community forums. Sorry to hear that your mother's landline has stopped working.
We appreciate you trying another handset already, however the message you are now getting on your line is one when a phone line is disconnected.
Due to this, I will pop you over a private message to take some details and investigate this issue further for you.
Please click on the purple envelope to accept the chat.
Kind regards Jodi.