FAULT TOLERANT TIME SYNCHRONIZATION
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United States of America Patent
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Issued Date -
Oct 7, 2010
app pub date -
Apr 2, 2010
filing date -
Apr 3, 2009
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Abstract
Systems and methods for distributing accurate time information to geographically separated communications devices are disclosed. Additionally, the desired systems and methods may adjust local time signals to compensate for measured signal drifts relative to more accurate time signals. Moreover, a system may determine a best available time signal based on a weighted average of available time signals or select a best available time signal based on weighted characteristics of various time signals. A system may be further configured to transmit time information embedded in an overhead portion of a SONET frame, including transmission of a standard or common time.
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