How do I stop the phone line from crackling?

My Cordless phone is a uniden telphone. I am getting bad interference on the line. I have placed filters on the phone as I have ADSL. This problem has just started recentley. Help it is driving me crazy and I cannot hear properly when talking on the telephone. I have also tried plugging in an ordinary telstra telephone and it still has the same interference.

Sharon
April 2008