The interface between a fire alarm system and another building system can be code-mandated, such as that for activation of a smoke control system, the supervision of control valves serving fire sprinkler systems, and elevator recall. Integration also can be optional and voluntary. An example of voluntary integration is a combination system where the BAS and the fire alarm system are integrated and share a common infrastructure using a network protocol such as a BACnet or LonWorks. Such integration can include HVAC systems management, lighting systems, security systems, door locks, fire alarms, and more. The application of a common infrastructure on which these systems can operate has allowed integration of systems that historically have required independent network communications. A common infrastructure for communications can provide cost savings, or allow for redundancy and robustness at a reasonable cost.

Systems and functions that are commonly interfaced with fire alarm include:We install and maintain: