Optical maintenance signaling in optical data networks
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United States of America Patent
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Issued Date -
Apr 10, 2003
app pub date -
Apr 8, 2002
filing date -
Apr 6, 2001
priority date (Note) -
Abandoned
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Abstract
A method and apparatus are presented for implementing maintenance signaling in an optical data network, said method comprising the use of a finite set of optical symbols to distinguish between different classes of failures. The method is format and bit rate transparent, and a network element does not need to read bits to interpret a signaling message. Faults protected within the network are distinguished from faults originating outside the network, and power glitches are filtered out of incoming alarm signals originating outside the network.
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