![comm-mass](https://abfsecurity.com/wp-content/uploads/2022/04/comm-mass.jpg)
Mass Notification Systems alert visitors facility-wide of impending threats.
For example, a hospital campus can send out a weather alert to everyone in the parking lot and facility of a possible tornado in the area. Another application may be for a school campus to warn of an intruder on the grounds. In fact, the National Fire Protection Association is beginning to require some form of Mass Notification for certain building types.