Static on my phone line. Maybe your inside jack got wet. Your inside jack may have gotten bumped or hit and the lines are not connected as well as they should be. Your line from the cord to the jack could be the problem. Your cord from the handset to the phone base could be the problem. If corded phone. The above could be repaired by you if you have the correct tools, replacement parts,the time and patience. For AVAYA, NORSTAR, NEC, SAMSUNG, MITEL, PANASONIC, TOSHIBA telephone systems and voicemail call (866)206-2316 or email MasterTelephone@gmail.com