NFPA 72 Chapter 21 deals primarily with:

NFPA 72 Chapter 21 focuses on emergency control function interfaces, which are critical components in fire alarm systems that allow for the coordination of various safety and emergency systems. This chapter outlines the criteria for how alarm systems can interface with other systems, such as building automation systems, fire suppression systems, and emergency communication systems. It ensures that these interfaces effectively respond to fire alarms and other emergencies, facilitating the appropriate and timely action during such events.

These guidelines help in the integration and functionality of alarms with other safety measures, ensuring that the overall system works harmoniously to protect life and property. By addressing the rules and requirements for these interfaces, NFPA 72 aims to enhance the reliability and efficacy of emergency response systems in a wide range of environments, which is vital for fire safety and management.