Protection switching arrangement for an optical switching...

Details Protection switching arrangement for an optical switching... Protection switching arrangement for an optical switching...

2006-02-14

2006-02-14

Phan, Hanh (Department: 2638)

Optical communications

Fault recovery

Bypass inoperative element

C398S007000, C398S012000, C398S014000, C398S017000, C398S019000, C398S033000, C398S001000, C398S003000, C398S045000, C398S048000, C398S050000, C398S056000, C398S079000, C398S082000, C398S083000, C398S053000, C398S175000, C398S176000, C385S024000, C385S037000, C385S016000, C385S017000, C385S018000

Reexamination Certificate

active

06999677

ABSTRACT:
A protection arrangement for an optical switching system includes protection switching for switch planes in the optical core and for ports in the tributary cards. For a multiple layer switch core protection is also provided between layers. A first layer is for switching optical channels. The protection switches used may be 1×N, 2×N or 3×N MEMS optical switches. The 1×N MEMS provides for protection switching. The 2×N MEMS provides protection switching and testing capability. The 3×N MEMS provides for protection switching, testing and backup of the protection switching. Application of these protection switches is shown in lambda plane switch cores, multiple layer switch cores and combined switch cores.

REFERENCES:
patent: 5457556 (1995-10-01), Shiragaki
patent: 6317529 (2001-11-01), Kashima
patent: 6433900 (2002-08-01), Kuroyanagi et al.
patent: 6498792 (2002-12-01), Johnson et al.
patent: 6570685 (2003-05-01), Fujita et al.
patent: 6579018 (2003-06-01), Li et al.

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