Hello Tom Hughey, 

Thanks for posting. Below are some questions that will help us troubleshoot this issue. I have also sent you a message to further address your issue.

1. What type of phone are you using (Corded / Cordless)?
2. Please power Cycle your Devices and if possible try a new phone/handset and see if the issue persists.
3. Can you please describe the noise that you are hearing? Is it static noise?

Thanks.
-Aedan