Automatic protection system for an optical transmission system
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United States of America Patent
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Jun 24, 2003
Grant Date -
N/A
app pub date -
Dec 28, 1999
filing date -
Dec 31, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An optical communication system and method for starting up and shutting down the system to ensure safety during repair of a fiber break are disclosed. A technique for shutting down an optical communication system having spans of optical transmission fiber interspersed serially between optical transformation sites and a plurality of amplifier sites includes shutting down both amplifiers on either side of a fiber disruption and both amplifiers in the same amplifier sites serving transmission in an opposite direction, followed by deactivation of all amplifiers within the same optical line between optical transformation sites. During startup, amplifiers enter an operating mode to ignore a system shutdown signal, an amplifier at a terminal site is forced on, and then successive amplifiers step through an intermediate safe power level before reaching full operating power.
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