High-speed facility protection in a digital...

H - Electricity – 04 – Q

Patent

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Details

H04Q 1/24 (2006.01) H04J 3/14 (2006.01) H04M 3/32 (2006.01) H04Q 3/00 (2006.01) H04Q 3/52 (2006.01) H04Q 11/04 (2006.01) H04M 3/12 (2006.01)

Patent

CA 2096402

A digital communications system with fast facility protection is disclosed. The system includes at least one digital cross-connect which is in bidirectional communication with east and west routes of the network via east and west transmit ports and east and west receive ports. The cross-connect broadcasts a facility over both the east and west routes, and receives the return facility over one of the routes. The cross-connect monitors the error status of the received facility for hard error conditions and excessive error rates, by way of a distributed processor in communication with the port. In the event of an error, the cross-connect blind switches the facility to the inactive port by way of a receive-end switch, according to a first embodiment. According to another embodiment, a head-end switch is performed, thus allowing for improved flexibility for port assignment in the cross-connect.

Système de communication numérique à protection rapide de ressource. Comprend au moins une interconnexion numérique communiquant dans les deux sens avec les artères est et ouest du réseau par l'intermédiaire de ports de transmission est et ouest et de ports de réception est et ouest. L'interconnexion transmet une ressource sur les artères est et ouest, et la reçoit en retour sur une des deux artères. L'interconnexion contrôle l'état d'erreur de la ressource reçue en ce qui concerne les erreurs non corrigibles et les taux d'erreurs excessifs, au moyen d'un processeur réparti communiquant avec le port. En cas d'erreur, l'interrupteur d'interconnexion fait passer la ressource au port inactif au moyen d'une commutation de fin de ligne, conformément à une première version. Conformément à une autre version, une commutation de tête de ligne est effectuée, ce qui permet d'améliorer la souplesse d'affectation des ports au niveau de l'interconnexion.

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