PASSIVE ARCHITECTURAL OPTICAL DISTRIBUTION NETWORK
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United States of America Patent
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Issued Date -
Oct 4, 2012
app pub date -
Jul 6, 2011
filing date -
Mar 28, 2011
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Abstract
Passive optical networks can experience faults that are unrecoverable. An embodiments of the present invention is a hybrid passive optical network configured to protect a primary optical path employing a switch to transmit data from the primary path to a secondary path in a passive manner. In an event data flows through both the primary path and the secondary path, the optical switch may be configured to monitor the primary path. In such an embodiment, the optical switch is a protection optical switch that is sensitive to monitoring an optical signal that flows on the primary path. If the switch detects a loss of signal on the primary path, the optical switch automatically switches delivery of the optical signal from the primary path to the secondary path, via the optical switch to allow an optical line terminal to receive optical signals virtually uninterrupted.
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