Data and voice communication systems, and safety and inspection solutions for confined and remote environments, namely, mines, railroad and mass transit tunnels, public works infrastructure, oil platforms, 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; safety and inspection systems, comprised of software applications, wearables, autonomous vehicles, and sensors to ensure worker and environmental safety in rugged, remote, and hazardous environments