Cap codes are the codes associated with a certain tone frequency used to activate pagers. I don't have the list with me, but these cap codes are programmed into the console for a specific departments tone out. They are also programmed into the Minitor pagers and when a certain cap code, or frequency of tone, is broadcast over the dispatch channel, the pagers decode it and sound an alert. These tones can be used also in scanners like the 330T or 396T to allow them to stay quiet on a dispatch channel until the receiver detects the tone and opens the audio.