Operating state control in redundancy protection systems
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United States of America Patent
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Oct 8, 2013
Grant Date -
N/A
app pub date -
Mar 6, 2009
filing date -
Mar 6, 2009
priority date (Note) -
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Abstract
Operating state control in redundancy protection systems is disclosed. One protecting apparatus of a redundant pair is selected to be in a first operating state in the redundant pair. Protected communication equipment for which the redundant pair provides redundancy protection transmits, to only the selected apparatus, communication traffic that includes content for further transmission from both protecting apparatus in the redundant pair. This causes the selected protecting apparatus to transition to or remain in the first operating state and the other protecting apparatus to transition to or remain in a second operating state. A protecting apparatus determines that it is to be in the first operating state if communication traffic received from the protected equipment includes content for further transmission from the protecting apparatus, and determines that it is to be in the second operating state if the received communication traffic includes no such content.
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