Power supply system to terminal equipment through an optical fib

Details Power supply system to terminal equipment through an optical fib Power supply system to terminal equipment through an optical fib

1980-06-19

1982-04-13

Bookbinder, Marc E.

Multiplex communications

Wide area network

Packet switching

455607, 455614, 455617, H04J 302, H04B 900

Patent

active

043251374

ABSTRACT:
In a communication system between an exchange station and terminal equipment through an optical fiber cable, a power supply for operating the terminal equipment is supplied from the exchange station through the optical fiber cable in a form of an optical energy. The optical fiber cable is utilized both for transmitting a voice signal between terminal equipment and the exchange station, and for transmitting the power supply from the exchange station to terminal equipment on a time divisional basis. When the terminal equipment is inactive, the exchange station transmits no energy, or transmits intermittently an optical pulse. The duration that the optical pulse is transmitted when the terminal equipment is inactive, is less than 1/10 of the total time. When a handset of the terminal equipment is picked-up and the terminal equipment becomes active, the change of the status of the terminal equipment is relayed to the exchange station using that limited amount of energy from the exchange station, or the output of the generator which provides the electricity upon picking-up a handset. When the terminal equipment becomes active, the exchange station is switched to constant transmitting of the power pulse to the terminal equipment for operating the same.

REFERENCES:
Applications of Optical Transmission in Today's and Future Communication Networks--Unterberger et al.--2nd European Conf. on Optical Fiber Communication (1976), Communication XII.3, pp. 383-387.
IEEE Communications Magazine, The IEEE Communications Society, Mar. 1979, vol. 17, No. 2, pp. 33-34.

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