Patent ID: 6359858
Filing Date: 2002-03-19
Classification: H04J,H04L,H04Q

Abstract:
A redundancy control system comprising:a plurality of tributary cards, each of said cards being outfitted so as to detect failures and one of said plurality of tributary cards being a working tributary card and another of said plurality of tributary cards being a redundant tributary card; a bridge, said bridge being outfitted so as to provide identical traffic to said working and redundant tributary cards; a working STS switching fabric, said working STS switching fabric receiving data frames from said working and redundant tributary cards, said working STS switching fabric comprising a first selector, said first selector being outfitted so as to select received traffic from one of said working and redundant tributary cards to process; a redundant STS switching fabric, said redundant STS switching fabric also receiving said data frames from said card, said redundant STS switching fabric comprising a second selector, said second selector being outfitted so as to select received traffic from one of said working and redundant tributary cards to process; a plurality of ATM switching fabric cards, said plurality of ATM switching fabric cards receiving data frames from said working and redundant STS switching fabrics; a plurality of ATM processor cards, one of said ATM switching fabric cards and one of said ATM processor cards being grouped to form a first redundancy group and another of said ATM switching fabric cards and another of said ATM processor cards being grouped to form a second redundancy group; and an APS hub, said APS hub being outfitted so as to become aware of detected failures on said plurality of tributary cards and switch said selector so as to select received data frames from said redundant tributary card upon becoming aware of a detected failure on said working tributary card, said APS hub further being outfitted so as to select one of said first redundancy group and said second redundancy group to be working and another of said first redundancy group and said second redundancy group to be redundant.