Optical network protection switching architecture

Details Optical network protection switching architecture Optical network protection switching architecture

2003-01-21

2008-09-02

Leung, Christina Y. (Department: 2613)

Optical communications

Fault recovery

Bypass inoperative element

C398S007000

Reexamination Certificate

active

07421197

ABSTRACT:
A method for protection switching includes receiving an optical signal from a transponder coupled to a client and optically splitting the signal to a first output and a second output. The first output is coupled by a first optical add-drop multiplexer to a first optical fiber, and the second output is coupled by a second add-drop multiplexer to a second fiber. The method further includes selecting one of the output signals for the working channel, and communicating the selected output signal to an optical network. During communication of the selected output signal to the optical network, the method includes monitoring for a failure condition in the optical network and, if the failure condition is detected, selecting the other output signal as the working channel and communicating the new selected output signal.

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