Emergency Voice Communication (or EVC) Systems provide two-way communication during the evacuation of a building during a fire or other emergency.

EVC systems are installed in building refuge areas in line with Building Regulations. They help protect lives by supporting safe evacuation for people who require assistance to egress a building, Form a building management point of view, using an EVC system helps both understand the locations of people in need of evacuation assistance and minimise risk to help them and the people assisting. 

The system facilitates communication between people waiting for assistance at call points (known as 'outstations') located in refuge areas and responders located at one or more central control points (known as 'master stations' or 'base stations') in the building control room or near to the alarm panel.