Tyco Simplex Grinnell’s Simplex TrueAlert addressable fire notification system applicances enable users to select strobe candela settings either in software or through hardware. Each TrueAlert appliance can be tested individually without disrupting an entire area with an audible signal from every appliance on a common circuit. T-Tap wiring replaces parallel-wired reverse polarity circuits, and each appliance can be tested as it is installed, allowing any problem to be identified and corrected on the spot. Appliances include horns, multicandela strobes, horn/strobes, speaker/strobes, a communications isolator module, and adapters for communication to conventional appliances.