Optical switching apparatus, optical transmission system and...

Details Optical switching apparatus, optical transmission system and... Optical switching apparatus, optical transmission system and...

2005-01-04

2005-01-04

Palmer, Phan T. H. (Department: 2874)

Optical waveguides

With optical coupler

Switch

C385S017000, C385S024000, C398S140000, C398S145000

Reexamination Certificate

active

06839480

ABSTRACT:
In an optical switching apparatus having redundantly-arranged optical switches, a route switching operation mode, an autonomic redundant switching operation mode and a compulsory redundant switching operation mode are discriminated from one another so that these operation modes are prevented from being executed at the same time, and also proper mask processing is performed at every switching operation mode. Therefore, emission of an undesired alarm and thus occurrence of malfunction when each switching operation is carried out can be prevented.

REFERENCES:
patent: 4878726 (1989-11-01), Fatehi
patent: 5764405 (1998-06-01), Alphonsus
patent: 20030118272 (2003-06-01), Tsushima et al.
patent: 20030170028 (2003-09-01), Mori et al.
patent: 6-311112 (1994-11-01), None
patent: 6-350542 (1994-12-01), None

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