TNG1S input module shall be a multiple tone generator input module. The module shall have a 5-pin screw terminal input barrier strip connector to make the trigger connections. The module shall include 8 tones, 512Hz burst/steady, slow whoop, siren, mechanical bell, Klaxon, night ringer, double chime, and doorbell tones. The module shall permit 4 of the 8 tones to be triggered. Momentary and continuous playback modes shall be available. The module shall have a level control. It shall have the ability to mute lower priority modules and be muted by higher priority modules. The module shall be able to assume any of 4 priority levels. The module shall have a gradual fade back from mute when the mute control is deactivated. The module’s output shall be assignable to either or both of two mixing buses.