Loop-back control apparatus for a loop network having duplicate

Details Loop-back control apparatus for a loop network having duplicate Loop-back control apparatus for a loop network having duplicate

1987-08-26

1989-05-09

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

H04J 302

Patent

active

048295124

ABSTRACT:
A loop-back control apparatus for use in an optical fiber transmission system, wherein it is possible to compensate for faults in opto-electrical and electro-optical converters contained in the optical fiber transmission system. An electrical switch, an optical switch, and duplicate access controllers are provided, the electrical and optical switches being controlled by a control signal generator to enable selection from among the various electro-optical and opto-electrical converters in the event of fault in one of those devices.

REFERENCES:
patent: 3859468 (1975-01-01), Smith et al.
patent: 4710915 (1987-12-01), Kitahara et al.
Topics in Applied Physics, vol. 39, "Semiconductor Devices for Optical Communication", P. W. Shumar, et al., Springer-Verlag, New York, 1980.
"An Experiment on High-Speed Optical Time-Division Switching", Syuji Suzuki, et al., IEEE Journal of Lightwave Technology, vol. LT-4, No. 7, July 1986.

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