H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 1/00 (2006.01) H04J 3/08 (2006.01) H04J 3/14 (2006.01) H04L 12/437 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 2065471
Misconnections between communications circuits in a bidirectional line-switched ring transmission system are eliminated by deterministically squelching in adjacent ring nodes, i.e., loop-back-switching nodes, communications circuits terminated in failed ring nodes in the ring transmission system. The deterministic squelching is realized by provisioning the ring nodes with all active communications circuits including those passing through the node which are terminated in other ring nodes in the bidirectional line-switched ring transmission system. Then, when one or more adjacent ring nodes fail, all active communications circuits terminated in those failed ring nodes are squelched in the adjacent ring nodes, i.e., in the loop-back-switching ring nodes.
Les mauvaise connexions entre les circuits de communication dans un système de transmission bidirectionnel à anneau de commutation de lignes sont éliminés par un blocage déterministe, dans les noeuds adjacents de l'anneau, c.-à-d. les noeuds de commutation de retour, des circuits de communication qui se terminent aux noeuds défaillants de ce système de transmission. Ce blocage déterministe se fait en mettant à la disposition des noeuds tous les circuits de communication actifs, y compris ceux qui passent par ces noeuds et qui se terminent à d'autres noeuds de l'anneau dans le système de transmission bidirectionnel à anneau de commutation de lignes. Quand survient une défaillance dans un ou plusieurs des noeuds adjacents, tous les circuits de communication actifs qui se terminent à ces noeuds en défaillance sont bloqués dans les noeuds adjacents, c.-à-d. dans les noeuds de l'anneau de commutation de retour.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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