9 Computer component testing and calibrating equipment; Computer heat sinks; Computer network adapters; Electronic and optical communications instruments and components, namely, communication link testers for testing communication links; Electronic testing equipment, namely, telecommunication line integrity testing apparatus; Plug adaptors; Plug connectors; Telecommunications and data networking hardware, namely, devices for transporting and aggregating voice, data, and video communications across multiple network infrastructures and communications protocols; Telecommunications cables; Telephone connectors