NYPD's Operations Unit usually alerts dispatch (central) of shots being fired at a specific location by utilization of ShotSpotter technology, which detects gunshots. If operations calls into Central and they don’t answer, Operations is just going to disappear. This is known as the “Operations Special Attack” because when Operations comes over the radio, everyone gets excited for a possible man with a gun call, then they disappear, making everyone more disappointed than my mother when I left her womb.
They just did an Operations' Special Attack on the Citywide 1 channel.