Link connectivity verification method
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United States of America Patent
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Mar 8, 2011
Grant Date -
Jan 17, 2008
app pub date -
Jul 11, 2007
filing date -
Jul 14, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A link connectivity verification message to recognize a physical link connection state is transmitted from the WDM to the PXC on a C-plane. The PXC transmits a link connectivity verification ACK message including information representing a physical link connection state, and the WDM transmits a cross-connect instruction message to cross-connect a transmission side and a reception side of a port (port 1) of the PXC. Probe light transmitted from the port (port a) of the WDM is turned back by a cross-connect of the port (port 1) of the PXC. The WDM receives the probe light to verify a link connectivity.
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