Communications headsets for use with communication radios, intercom systems, or other communications network transceivers; Computer card adapter; Computer network adapters; Computer network adapters, switches, routers and hubs; Electronic and optical communications instruments and components, namely, optical transceivers; Ethernet adapters; Ethernet transceivers; Fiber optics; Network cards; Telecommunications equipment, namely, fiber-optic transceivers, fiber optic repeaters, converters and ...