Multiplex communications – Fault recovery – Bypass an inoperative station
Patent
1995-04-27
1997-09-02
Hsu, Alpus H.
Multiplex communications
Fault recovery
Bypass an inoperative station
370249, 370434, 370502, 39518201, 34082506, H04J 116, H04J 314, H04L 12437
Patent
active
056639503
ABSTRACT:
An apparatus and method for fault isolation and bypass in a dual ring communication system provides a reconfiguration unit capable of attachment to a dual ring communication system having a plurality of reconfiguration units. The disclosed reconfiguration unit has a single adapter to the dual ring communication system and includes isolation and wrap switches capable of isolation and bypass of faults. A reconfiguration unit having a single adapter to the dual ring communication system detects failures on the ring and generates a failure frame which if not received from the ring causes the reconfiguration unit to enter a downstream wrap state. The reconfiguration unit enters an upstream wrap state if a failure frame is received from the nearest downstream reconfiguration unit.
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patent: 5383191 (1995-01-01), Hobogood et al.
patent: 5473752 (1995-12-01), Beistle et al.
patent: 5535192 (1996-07-01), Truby et al.
Lee Nai Po
Smith Jay Lee
Bigel Mitchell S.
Cockburn Joscelyn G.
Hsu Alpus H.
International Business Machines - Corporation
Rao Seema S.
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