Multiplex communications – Fault recovery – Bypass an inoperative station
Reexamination Certificate
2007-04-03
2007-04-03
Pham, Chi (Department: 2616)
Multiplex communications
Fault recovery
Bypass an inoperative station
C370S225000, C370S245000, C370S463000, C711S114000, C714S004110, C714S025000, C714S717000
Reexamination Certificate
active
10150446
ABSTRACT:
A method and apparatus for recovery from faults in a loop network (400) is provided. The loop network (400) has a host means (402), a first loop and a second loop (406, 408), a plurality of ports (410) connected to each of the loops (406, 408) and a control device (414, 440) on or connected to each loop (406, 408) with bypass control over at least one of the ports (410) connected to the loop (406, 408). In the event of a failure on the first loop (406), the host means (402) instructs the bypassing of at least one port (410) on the first loop (406), the host means (402) sending the instructions via the control device (414, 440) on or connected to the second loop (408). The host means (402) may determine the physical topology of the ports (410) on the first and second loops (406, 408) such that when a failure is reported to the host means (402) by a port (432) on the first loop (406), the host means (402) instructs the bypassing of a port (434) in a specific relationship to the reporting port (432) on the first loop (434). The host means (402) may instruct the bypassing of all ports (416) on the first loop (406) and subsequently selectively un-bypass ports (416) to ascertain the location of a faulty port or ports.
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Beer Reginald
Cashman Paul Nicholas
Hooton Paul
Judd Ian David
Maddock Robert Frank
Harrington & Smith ,LLP
Jagannathan Melanie
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