Hello all I have a att merlin legend system with a R7 processor, I have a Magix card in a clamshell houseing the card is a ETR 016 card and when I plug a MLS 12D phone into every port to test the ports they all emit a high pitched noise on the handset, the phone works fine but just that noise can be bothersome. If anybody has any clue of what it could be and can it be fixed or is it a bad card. Thanks.