Electronic switch and display indicator that communicate data with computers; wireless transmitting and receiving apparatus; wireless transceiver; wireless transmitting and receiving apparatus for relay; wireless transceiver for relay; radio machines and apparatus, namely, antennas; radio communication machines and apparatus, namely, repeaters, extenders, receivers, and transmitters; radio communication modules, namely, wireless data link modules for data communication; telecommunication devices and apparatus for enabling and facilitating radio communication and radio connectivity for use in computer network for radio communication, namely, computing and operating platforms consisting of wireless networks and gateways for collection and management of data; telecommunication devices and apparatus, namely, fiber-optic transceivers, fiber optic repeaters, converters and optimizers, wave division multiplexers, free-space optics transmission systems, switches including Ethernet switches and routers, fiber-to-the-home and ethernet-over-VDSL access aggregators, terminators and repeaters, and remote presence management products, namely, switches, and console, alarm, sensor and power management machine tools to input or output CNC (computer numerical control) data; electronic machines, apparatus and their parts, namely, electronic interface equipment for machine tools to input or output CNC (computer numerical control) data, all for enabling and facilitating radio communication and radio connectivity for use in computer network for radio communication; computer programs for enabling and facilitating radio communication and radio connectivity for use in computer network for radio communication; measuring or testing machines and instruments, namely, communication link testers for testing communication links