What is a defining feature of addressable devices in a fire alarm system?

• A. Dials to set address numbers in the ones and tens places
• B. They require no unique identification for each unit
• C. They automatically connect to a central monitoring station
• D. They have a shared address for all units

Answer: (A)

Addressable devices are defined by their ability to be uniquely identified by the control panel. Each device gets a distinct address, usually set with dials or programmable switches for tens and ones, so the panel can pinpoint exactly which device activated or needs attention. This unique addressing makes location and status information precise, enabling targeted signaling and maintenance. The other ideas don’t fit because without a unique ID, the panel couldn’t tell devices apart; simply connecting to a monitoring station isn’t what defines addressability, and having a shared address would defeat the purpose of identifying each unit separately.