Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1994-09-15
1996-07-09
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359110, 359177, 370 161, H04B 1008, H04B 1012, H04B 1020
Patent
active
055350356
ABSTRACT:
A communications method and an optical fiber ring communications system including multiple devices or ports are provided. The optical fiber ring communications system includes first and second optical link modules (OLMs) coupled to each of the multiple ports. First and second optical fibers extend between adjacent ports in the ring communications system and are coupled at each end to one of the first and second OLMs. The first and second optical fibers define dual fiber channel arbitrated loops during normal operation in the system. If an optical fiber link is disconnected between two ports, then the communications system is configured as a single arbitrated loop. Alternatively, when the communications system includes a ruler port and subject ports, then the communications system can be configured as two separate loops coupled by the ruler port if an optical fiber link is disconnected between two ports. The ring communications system supports a large number of ports and the circumference of the ring can equal hundreds of kilometers.
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DeFoster Steven M.
Thatcher Raymond J.
Truestedt Horst L.
International Business Machines - Corporation
Pascal Leslie
Pennington Joan
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