i have an intermittent dial tone on my landline phone. i have a base phone and 3 handsets. all have the same tone, have tried other phone but same tone.
Doesn't that mean you have voicemail? Try dialling 1571 . The intermittent tone should become constant after listening to any messages.
Thank you for getting in touch emj53
Were you able to check if the change in dial tone was related to a voicemail?
Let me know and I will be happy to help.