What kind of noise is it? If it’s a stuttered dial tone, you may have a voicemail message. Try dialling 1571 to access your message. Once the message has been read and saved or deleted, the stuttered dial tone should disappear.
If you don’t have a voicemail message, but continue to receive a stuttered dial tone, you may have another feature in use. Please refer to the Phone User Guide for further features information.
For any other noise, such as a crackling line, you should check all the wiring around the phone (look for things like carpet grippers embedded in the phone wire). Swap the phone for one that definitely works. Check out our Service status area where you can see if there are any known outages on the telephone network, or if there’s a problem with your own telephone line.