An Auxiliary Radio Communication System Supporting security features such as Man Down and real-time In-Building Location Tracking. The ARC System locations are determined by the engineers overseeing the building in question. An ARCS has several distinctive features: it is wireless and bidirectional, while using frequencies that are exclusive for the FDNY to prevent interference. Its basic components are dedicated radio consoles (DRC), radio amplification units (RAU), radiating cables, antennae and power supplies. The layout of an ARCS includes a base station or transceiver, connected to an antenna system that covers the whole building, plus a radio console on the lobby for ease of access. Like with any major building system, approval from the NYC Dept. of Buildings is required before installation. In the specific case of an ARCS, approval from the NYC Fire Commissioner is also required, given the important role of the system in firefighting.