1:n ring-type signal protection apparatus

Details 1:n ring-type signal protection apparatus 1:n ring-type signal protection apparatus

H - Electricity

04

B

H04B 3/46 (2006.01) H04B 3/06 (2006.01) H04J 3/14 (2006.01) H04J 3/16 (2006.01) H04L 12/42 (2006.01) H04L 12/437 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2076844

A system is illustrated that uses a spare or auxiliary add-drop muldem located at each end of N high capacity transport circuits to form a ring-type protection circuit using one additional high capacity transport. This is accomplished by using error detection circuitry to switch all of the auxiliary muldems to be normally in a high speed input/output circuit LOOPed condition but switching the auxiliary muldems on either end of a "bad" circuit to a THRU or open condition upon detection of a problem and allowing signals to be routed through the protection transport mechanism rather than the normal transport mechanism. 37

L'invention est un système qui utilise un muldem d'insertion-extraction de rechange ou auxiliaire installé à chaque extrémité de N circuits de transmission à grande capacité pour former un circuit de protection du type en anneau utilisant un circuit de transmission à grande capacité additionnel. Ceci est réalisé au moyen d'un circuit de détection des erreurs; quand les conditions sont normales, tous les muldems auxiliaires sont connectés en boucle pour former un circuit d'entrée-sortie à grand débit, mais en cas de détection d'un problème, les muldems auxiliaires qui se trouvent à l'une ou à l'autre des extrémités d'un circuit défaillant sont commutés en circuits ouverts et les signaux sont acheminés via le mécanisme de protection plutôt que via le mécanisme de transmission normal.

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