Leaderboard

Most likely they have had a broadband issue since your last visit, star wiring is considered an issue that contributes to interference on the line and poor internet speeds. Generally when this comes to alarms it's because the line has been taken from a spur/star before the line reaches the master socket NTE5. This was never an issue years ago and line engineers would happily spur a line, so it maybe nothing to do with your connection but further within the phone extensions wiring. You will have to work out the layout of the phone lines and where they come from, then how to make sure everything is supplied from the master socket and filtered correctly. This will also depends on which type of master socket you have and the layout of the wiring. If you don't want to get involved, best to tell the customer you need a compatible block terminal fitted adjacent the alarm panel.

Had this a little while ago , again it was broadband issue , only difference I knew when engineer was coming , met him on site and he actually helped reconfigure wiring until his tester was happy end of story But what swb said is spot on