Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-06-28
1999-05-11
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359117, 359161, 359166, H04B10/24;10/12
Patent
active
059033703
ABSTRACT:
A transmission-based restoration system and method restores a failure of an optical pipe within an optical domain. Restoration occurs in the same domain in which the failed optical pipe is located. First and second optical pipe rings and a first plurality of optical switch platforms are deployed within a domain. The first optical pipe ring carries optical communication signals in first and second opposing directions around the first optical pipe ring. The second optical pipe ring carries optical communication signals in first and second opposing directions around the second optical pipe ring. Each optical switch platform is connected to the first optical pipe ring and the second optical pipe ring for switching the optical communication signals between the first and second optical pipe rings. When the first and second optical pipe rings both fail between adjacent first and second optical switch platforms, the first optical switch platform switches the optical communication signals carried in the first direction in the optical pipe ring to be carried in the second direction in the second optical pipe ring. The second optical switch platform switches the optical communication signals carried in the second direction in the first optical pipe ring to be carried in the first direction in the second optical pipe ring. Preemptive traffic, multiple domain switches, and redundant configurations are used.
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MCI Communications Corporation
Pascal Leslie
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