If you're experiencing an issue with the current wall socket your phone is plugged into, try another wall socket in your home (if available) to make sure the issue is not with internal cabling.
-
Disconnect the home phone from the current phone socket.
-
Locate all alternate phone sockets and, one at a time, plug the home phone into each of the sockets and check the quality of the dial tone. If clear, attempt to make a phone call. Repeat process until all sockets have been checked/issue is resolved.