08/19/2026
A mass notification system nobody can understand is not a safety system.
NFPA 72 Chapter 24 does not ask how loud the speakers are. It asks whether people can understand the words — verified in the finished space, not modeled on a drawing.
What actually determines that:
• Speaker density set by ceiling height and reverberation
• Tap settings tuned per zone at commissioning
• Hard surfaces designed around, not against
• Directional horns for exterior, not indoor speakers aimed out
• Zones that match how the building really evacuates
IP endpoints on PoE+ changed the math. One system runs daily paging and bell schedules, and becomes the emergency system when it has to.
Most failures we get called to fix started at design.
System architecture: AtlasIED IPX endpoints with Singlewire InformaCast. Diagram courtesy of AtlasIED.