Redundancy arrangement for telecommunications system

H - Electricity – 04 – L

Patent

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H04L 1/22 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2280147

A redundancy arrangement for use in connection with a programmable telecommunications switch or other device. An active hardware device, such as an ISDN packet engine card, is paired with a substantially identically configured standby device. During operation, the active device, in addition to performing all of its normal functions, also advises the standby device of all events which have an effect on the operational state of the active device. By ensuring that the standby device processes the same events in the same sequence as the active device, the standby device's operational state continuously tracks that of the active device. Should the active device malfunction or be taken out of service, the standby device becomes active without significant interruption or loss of service.

L'invention concerne une configuration redondante destinée à être utilisée en liaison avec un commutateur de télécommunications programmable ou autre dispositif. Un élément de matériel actif (par exemple, carte de machine par paquets du RNIS), est apparié avec un dispositif de secours à configuration sensiblement identique. En fonctionnement, non seulement le dispositif actif accomplit toutes ses fonctions normales, mais encore il informe le dispositif de secours de tous les événements ayant une incidence sur son propre état opérationnel. En s'assurant que le dispositif de secours traite les mêmes événements suivant la même séquence que le dispositif actif, on parvient à ce que le dispositif de secours calque en permanence son état opérationnel sur celui du dispositif actif. En cas de défaut de fonctionnement ou de mise hors servive du dispositif actif, le dispositif de secours devient actif sans interruption ou perte de service importante.

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