Method and system for detecting fault conditions on multiplexed networks
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United States of America Patent
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Dec 23, 1997
Grant Date -
N/A
app pub date -
Sep 9, 1996
filing date -
Sep 9, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for detecting fault conditions on a multiplexed network having first and second busses. The method includes sensing a start of frame delimiter (SOF) for the first bus, and determining the state of the second bus when the SOF is sensed. If the state of the second bus has been passive over a first selected time period, the state of a differential between the first and second busses is determined. If the state of the differential between the first and second busses is not indicative of a pre-qualified start of frame delimiter, then a passive fault is indicated. Additionally, the method includes sensing an end of frame delimiter (EOF) for the first bus, and determining the state of the second bus when the EOF is sensed. If the state of the second bus has been active over a selected time period, then an active fault for the second bus is indicated. A system for performing the method is also disclosed.
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