Optical communications – Fault recovery – Bypass inoperative element
Reexamination Certificate
2005-08-23
2005-08-23
Sedighian, M. R. (Department: 2633)
Optical communications
Fault recovery
Bypass inoperative element
C398S002000, C398S003000, C398S004000, C398S019000, C398S025000, C398S033000
Reexamination Certificate
active
06934469
ABSTRACT:
A collapsed ring fiber optic system includes a service path and a protection path provides at a shallow water portion of the fiber optic system, to deal with any fiber cuts that may occur at the shallow water portion without loss of main trunk bandwidth. The service and protection paths meet at a branch point, which is preferably located at a deep water portion of the fiber optic system. A passive combiner or a 1×2 switch is provided at the branch unit, along with a detector and a processor, to determine whether any signals are being received from the service path, and if not, to reconfigure the system to accept signals from the protection path. At another shallow water portion of the fiber optic system, nearby where a destination is located, the signal provided on the optical path over the deep water portion is split into a service path and a protection path, to provide redundancy to deal with any fiber cuts that may occur. The fiber optic system may also be utilized for a land-based system, having high probability of fiber cut regions and low probability of fiber cut regions.
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Esman Ronald Dale
Feinberg Lee Daniel
Hagopian John
Hayee M. Imran
Johnson Ronald E.
Dorsal Networks Inc.
Sedighian M. R.
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