How to use the comm beltpacks Push the buttons. Hold the talk button to talk, release when done speaking. Double tap talk to latch it in the on state. Tap again to release it. Call will blink a light on all other beltpacks on the current comm line, and will flash a strobe at FOH if on line "A". The volume wheel will only affect the volume in your headset, not the volume you will be heard by other packs.