What is the primary function of two-way voice communication in emergency scenarios?

The primary function of two-way voice communication in emergency scenarios is to enable direct communication between building occupants and emergency staff. This system is particularly vital during emergencies, as it ensures that occupants can report specific situations in real time, providing crucial information that can assist responders in assessing the situation more efficiently. This interactive communication allows for guidance, reassurance, and instructions from emergency personnel, which can be critical in ensuring the safety of those inside the building.

In contrast, options that focus on access for fire department personnel, transmitting alarm signals, or monitoring security systems do not reflect the core function of two-way communication. While these actions are important in their own right, they do not encapsulate the primary aim of fostering immediate dialogue between those in danger and the responders who can help them.