Optical switching apparatus and optical communication network system
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United States of America Patent
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Aug 23, 2005
Grant Date -
Jul 10, 2003
app pub date -
Mar 11, 2002
filing date -
Jan 15, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An optical communication network system is disclosed, which includes an optical switching apparatus. The optical switching apparatus includes an optical switch for switching and setting routes of an optical signal without being converted, a control unit for instructing the optical switch to execute a route switching operation, and a performance monitor for detecting performance of the optical signal having a route set by the optical switch. The performance monitor issues an alarm when the performance detected is deteriorated from predetermined performance. The control unit includes an alarm masking unit for masking the alarm issued from the performance monitor at least for a predetermined masking period from a starting time of a switching operation by the optical switch, and thus preventing the alarm from being issued.
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