Extending SONET/SDH automatic protection switching
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United States of America Patent
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Aug 4, 2009
Grant Date -
Jun 30, 2005
app pub date -
Feb 15, 2005
filing date -
Dec 5, 1997
priority date (Note) -
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Abstract
The invention provides a method and system for coupling a SONET/SDH network to a routing network that does not have a single point of failure. Multiple routers are coupled between the SONET/SDH network and the routing network, one for each data path; for example, a first router for the working data path and a second router for the protection data path. The routers intercommunicate to force APS to switch data paths bidirectionally, so as to allow only a single router for each data path.
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