Optical communications – Diagnostic testing – Determination of communication parameter
Reexamination Certificate
2008-09-26
2009-08-25
Singh, Dalzid (Department: 2613)
Optical communications
Diagnostic testing
Determination of communication parameter
C398S034000, C398S005000, C398S007000
Reexamination Certificate
active
07580633
ABSTRACT:
A method for data-flow protection of an optical interface in data communication equipment includes: receiving an optical-signal from a source-neighboring device, then duplicating the received optical signal into two duplicated optical signals. One of the optical signals is sent to a protected device for processing. According to the protected device working status, either the optical signal having been processed by the protected device or the second duplicated optical signal is selected and sent to a destination-neighboring device. The device includes a first optical-signal duplicating unit and an optical-signal selecting unit. The first optical-signal duplicating unit is used for duplicating an optical signal, and the optical-signal selecting unit is used as a selector. The method and device proposed by the disclosure are independent to network topology and can protect data-flow reliably.
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patent: 6947623 (2005-09-01), Ramaswami et al.
patent: 7079555 (2006-07-01), Baydar et al.
Dong Shuyou
Wang Chongyang
Zhang Zhichun
Huawei Technologies Co. Ltd.
Singh Dalzid
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