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Method and apparatus for recovery from faults in a loop network
 
   
Document Number
US Patent 7203161
Issued Date
April 10, 2007
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Abstract
A method and apparatus for recovery from faults in a loop network (500) is provided. The loop network (500) has a plurality of ports (520, 530, 532, 534) serially connected with means for bypassing the ports (520, 530, 532, 534) from the loop network (500). A control device (522, 524) is provided with bypass control over at least one of the ports (530, 532, 534). A host means (502) sends a command to the control device (522, 524) at regular intervals and the control device (522, 524) has a counter which restarts a time period at the receipt of each command. If the time period expires, the control device (522, 524) activates the means for bypassing all the ports (530, 532, 534) under its control. The loop network (500) may have two loops (516, 518) with at least some of the ports (520, 530, 532, 534) common to both loops (516, 518).
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Number of Claims:
8
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Published
April 10, 2007
Application Number
10/150,578
Filed
May 17, 2002
US Classification
370/224  
Int'l Classification
H04J   1/16   (20060101)   H04J   3/14   (20060101)   H04L   1/00   (20060101)   H04L   12/28   (20060101)   H04L   12/56   (20060101)  
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Assistant Examiner
Attorney/Law Firm
Priority Data
Jun 29, 2001 [GB] 0115969.8
USPTO Field of Search
370/222   370/223   370/224  
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