Fiber optics and light emitting diodes for use in connection with communication networks

Cables for electrical and optical signal transmission systems; Cables for electrical or optical signal transmission; Cables for optical signal transmission; Calibration devices for calibrating optical emission spectrometers; Calibration devices for calibrating optical emission spectrometers, atomic absorption spectrometers and X-ray apparatus, other than for medical use; Electronic and optical communications instruments and components, namely, optical transceivers; Electronic and optical comm...

telecommunications services