The refuge system is designed to provide communication between the master intercom/annunciator station, and up to eight (8) (or more) area of refuge (area of rescue) remote call-in stations.

Calls are indicated at the master by visual and audible signals. The master station also has sensitive two-way communications and tone call functions. Remote call-in stations have sensitive two-way communications, call-placed and call-answered LED Indicators. A maximum of eight (8) remote call-in stations may be connected to the standard master station. Larger capacity masters, or masters with desk or surface mounting, or privacy handsets are available on a special-order basis.