TR TUNNEL RADIO OF AMERICA

Communication data and wireless systems for confined spaces, namely, mines, railroads and mass transit tunnels, as well as commercial and industrial applications, comprised of base interface units to connect to base radios, network amplifiers, in-tunnel cabling and antennas; distributed antenna systems designed to extend two-way wireless data and voice signals in zones normally shielded from coverage by conventional wireless systems, comprised of interface units to connect to base radios, network amplifiers, repeaters, and signal antennas; wireless RFID systems for tracking personnel and assets, comprised of RFID beacon devices and readers to receive, store and re-transmit data via wireless connection