Pmc-sierra, Inc.

Jeffrey Scott Roe

Winston K Mok

Gregory Jacob Erker

Carl Dietz McCrosky

Bernard Guay

Kenneth Evert Sailor

Scott Arthur Muma

Andrew Milton Hughes

Douglas Konkin

Ian Gordon Barrett

Michael James Smith

A data detection system includes, in part, a CID detector, a DC balance monitor and a transition density detector. The CID detector is configured to detect whether the received data stream includes a CID exceeding a predetermined threshold count. The DC balance monitor is configured to detect DC imbalances in the incoming data and that may be indicative of errors in the data. The transition density detector is configured to detect whether a minimum transition density exists during a given time period. If a violation is detected by any one of these three detectors, an out-of-frame signal is asserted. The incoming data stream may be a scrambled SONET or SDH data stream.

Serial data validity monitor

A time:space:time switch fabric incorporating an odd integer number of spatially distributed data switches and a plurality of spatially distributed data serializers. Each data switch has a first plurality of ingress ports, an equal plurality of egress ports, and a space switch for selectably interconnecting any one of the ingress ports to any one of the egress ports. Each data serializer has an input bus for receiving signals to be routed through the switch fabric, an output bus for outputting signals routed through the switch fabric, a plurality of egress ports selectably connectible to any one of the data switch ingress ports, and an equal plurality of ingress ports selectably connectible to any one of the data switch egress ports. The ingress/egress ports are characterized by:

Flexible, self-aligning time and space switch fabrics

Growing community of inventors

Saskatoon, Canada

Jeffrey Scott Roe