Refer to your installation manual. Page 16 & 17. Get in to INSTALLER MODE, press OK, enter code, keep pressing NEXT until displays DEFINE COM press OK, keep pressing NEXT until option 33 LINE FAIL REP is displayed. Press OK then press NEXT until you see DONT REPORT now press OK. You will see a black filled in square next to DONT REPORT. Now keep pressing AWAY until OK TO EXIT is displayed then press OK.