Technique for realizing fault-tolerant ISDN PBX

Details Technique for realizing fault-tolerant ISDN PBX Technique for realizing fault-tolerant ISDN PBX

1997-09-09

1999-12-14

Kizou, Hassan

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

370244, 370250, 379279, G01R 3108, H04M 308

Patent

active

060026650

ABSTRACT:
A technique for realizing a fault tolerance of an integrated services digital network private branch exchange (ISDN PBX), includes: dualizing main control devices of the ISDN PBX into an operating section and a waiting section so as to sustain a subscriber service in progress even when the ISDN PBX has an unexpected problem; allowing the operating section to transfer to the waiting section various information required for performing a section switching to sustain an identical status between the operating section and waiting section, while providing a service requested by a user; and allowing the waiting section to perform the section switching so as to sustain the service as a new operating section when the operating section has an error.

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