Abstract: A system for providing secondary data storage and recovery services for one or more networked host nodes has a server application for facilitating data backup and recovery services; at least one client application for facilitating host node configuration to receive services; a secondary data storage medium; and at least one mechanism for passive acquisition of data from the one or more host nodes for storage into the secondary data storage medium by the server application. In a preferred embodiment secondary storage is streamlined through continuous data backup and enhanced by elimination of redundant write data.

Abstract: A system for providing secondary data storage and recovery services for one or more networked host nodes has a server application for facilitating data backup and recovery services; at least one client application for facilitating host node configuration to receive services; a secondary data storage medium; and at least one mechanism for passive acquisition of data from the one or more host nodes for storage into the secondary data storage medium by the server application. In a preferred embodiment secondary storage is streamlined through continuous data backup and enhanced by elimination of redundant write data.

Abstract: A plurality of transmission circuits transmit data over one or more output lines. A plurality of receiving circuits receive data over one or more of a set of input lines A plurality of parallel-serial conversion circuits coupled to the plurality of transmission circuits and to the plurality of receiving circuits, the plurality of conversion circuits to convert parallel signals to one or more sets of serial signals and to send the converted serial signals to one or more corresponding transmission circuits, and to receive one or more sets of serial signals from one or more of the receiving circuits and to convert the serial signals to parallel signals.

Abstract: An electronic system includes a backplane, a first plurality of slots coupled to the backplane, the first plurality of slots having a first electrical interface to be coupled to electrical circuit cards of a first type, wherein the electrical circuit cards of the first type receive network data and convert the network data to SONET formatted data, and a second plurality of slots coupled to the backplane, the second plurality of slots having a second electrical interface to electrical circuit cards of a second type. The backplane routes data signals between the first plurality of slots and the second plurality of slots.

Abstract: A serial data signal having a predetermined sequence to indicate a start of a frame of data is received. The serial data signal is compared to a plurality of values. The plurality of values include the predetermined sequence and one or more values representing logical rotations of the predetermined sequence. A match signal is generated in response to the serial data signal matching one of the plurality of values.