NFPA 72 requires firefighter telephone systems to support no fewer than how many handsets under simultaneous use?

NFPA 72 requires firefighter telephone systems to support no fewer than how many handsets under simultaneous use?

• A. 4
• B. 5
• C. 6
• D. 7

Answer: (B)

NFPA 72 ensures firefighter communications stay reliable during an incident by setting a minimum number of handsets that can be used simultaneously. The standard requires at least five handsets to be available for concurrent use. This supports multiple crews and roles—such as the incident commander, a communications role, and crews on different floors or areas—without the lines getting busy. Four would risk bottlenecks in a typical multi-area building, while the extra numbers beyond five aren’t required by the code, though they can be specified for larger sites. So, the minimum required is five handsets.

NFPA 72 ensures firefighter communications stay reliable during an incident by setting a minimum number of handsets that can be used simultaneously. The standard requires at least five handsets to be available for concurrent use. This supports multiple crews and roles—such as the incident commander, a communications role, and crews on different floors or areas—without the lines getting busy. Four would risk bottlenecks in a typical multi-area building, while the extra numbers beyond five aren’t required by the code, though they can be specified for larger sites. So, the minimum required is five handsets.