Blazon/3 is triggered by the same voltage which lights the normal signal lamps in the intercom system. Whenever any signal lamp button on any station in the same circuit is pressed, the Blazon/3 will be activated. The xenon lamp is permanently connected. The audible annunciator may be switched among constant, pulsed, and off. Circuitry is provided to sustain the Blazon/3 for 4 seconds after being triggered. The xenon lamp has a flash rate of 2Hz, providing 8 flashes per cycle.The Blazon/3 is connected to the headset intercom system in the same manner as a belt pack. It has two 3-pin XLR connectors on the rear panel. By convention (to differentiate from microphone inputs) the female connector is designated as input. The male connector is provided for looping onwards to the next station in the system. Reversing these connections will not affect operation.