A device that produces a high-intensity, directional, monochromatic beam of light. A device having a photoelectric property such as the ability to generate a current or change its electrical resistance when exposed to light. A device connected between a computer and a telephone line. It consists of a modulator that converts digital computer signals into audio signals for transmission over the telephone line and a corresponding demodulator to convert the incoming audio signals into digital form. A glass thread that acts as a guide for lightwaves.
Fibres used in telecommunications usually have a cladding of glass of a lower refractive index.
In a communication system, several fibres are made up into a cable. A light-sensitive cell. The light-sensitive cell layers of the inner lining of the back of the eye. The communication of information over a distance by means of radio waves, optical signals or along a transmission line. A coding system used for high speed, reliable data transmission over telephone lines. virtual reality.