I am just about to investigate why several handsets have different types of connections issues to an audio door entry system. Some buzzers do not work, some can hear but not speak and some have a working door release and some do not. A bit of a mess. Now before i replace the main control unit and handsets i would like to simply test each wire to ensure there are no breaks. I was thinking about using a multimeter on each wire at either end and ask smeonme to press buttons and talk and then measure activity on each wire.
Thanks and thoughts.
Thanks and thoughts.