infrared transmission

   A method of wireless transmission that uses part of the infrared spectrum to transmit and receive signals.
   Infrared transmissions take advantage of a frequency range just below that of visible light, and they usually require a line-ofsight connection between transmitter and receiver.
   Infrared transmission can be used to send documents from portable computers to printers, to transmit data between portable computers, to exchange information between computers and cellular telephones and faxes, and to connect to home entertainment systems. Almost every manufacturer of portable devices is implementing infrared communications at some level.

Dictionary of networking . 2014.

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