Cables for electrical or optical signal transmission; Calibration devices for calibrating ultrasonic testers and optical emission spectrometers; Electronic and optical communications instruments and components, namely, optical receivers; Electronic and optical communications instruments and components, namely, optical transceivers; Electronic and optical communications instruments and components, namely, optical transmitters; Electronic test and measurement devices for use in the fields of networks and telecommunications, namely, instrumentation used to test and certify new and existing data and voice communication cable and coaxial cable; Fiber optic cables; Fiber optic instruments, namely, fiber optic optical time domain reflectometers; Fibre optic couplings; Filters for optical devices; Junction sleeves for fibre optics; Measuring apparatus, namely, laser distance meters; Optical fiber connectors; Optical fibres, telephone receivers, switchboards, telephone and telegraph wires, video telephones; Optical reflectors; Protective sheaths for fiber optical cables; Surveying apparatus and instruments; Telecommunications equipment, 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 devices; Wavemeters