Fault-tolerant processing system architecture

Details Fault-tolerant processing system architecture Fault-tolerant processing system architecture

1993-09-01

1995-12-05

Beausoliel, Jr., Robert W.

Excavating

395500, 39520019, 3951821, 39518209, 371 681, 371 682, 3642683, 3642689, 3642285, G06F 1134, G06F 1116, G06F 1120

Patent

active

054737710

ABSTRACT:
A fault-tolerant call-processing adjunct processor comprises a redundant, duplicated, service unit provisioning and maintenance processor), a duplicated LAN connected to both service units, and plurality of served units (voice-processing processors) each connected to both LANs. Each service unit and each served unit has a duplicate copy of mission-critical information (customer records and commands). Both service units are continuously exercised by operating in an active-active configuration. The service units alternate the use of the LANs, thereby continuously exercising both LANs and providing independent duplicate sources of the mission-critical information to the served units. All sending units rely on having their mission-critical communications timely acknowledged by all receiving units. Served units retry with the other service unit those communications that failed with a preferred service unit. All units store failed communications for subsequent retry. Served units either send communications (alarms) to both service units, or rely on service units to exchange communications (call measurements) received from the served units, to ensure that both service units are in possession of the same information.

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