Connection protection between clients and optical...

Optical waveguides – With optical coupler – Switch

Reexamination Certificate

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Details

C385S024000, C385S015000, C385S017000, C385S147000, C398S017000, C398S021000, C398S020000, C398S036000, C398S050000

Reexamination Certificate

active

06882765

ABSTRACT:
The present invention provides methods, apparatus and systems for protecting connections between optical cross-connect switches and client equipment. A connection failure is detected, signaled, and a switch made by the client equipment and the optical cross-connect switch to a protection connection between them so as to minimize service interruption. An out-of-band channel or an in-band channel can be used to signal the connection failure.

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