Data flow control arrangement for local area network

Details Data flow control arrangement for local area network Data flow control arrangement for local area network

H - Electricity

04

L

354/234

H04L 12/00 (2006.01) G06F 13/00 (2006.01)

Patent

CA 1286788

DATA FLOW CONTROL ARRANGEMENT FOR LOCAL AREA NETWORK Abstract In a local data distribution network configuration a plurality of bidirectional data distribution busses are each connected to a bus master control circuit at a terminal end of the bus. Connected to each of the data distribution busses are a plurality of passive outlets to which intelligent connectors or stations may be connected. Each station has a unique address and is utilized for individually coupling data processing devices to the bus. Grouped pluralities of the bus master control circuits are included within a bustermination hub facility. Data from any of the bus master control circuits may be transferred by the bus termination hub via a data trunk as part of a star type configuration, to a central switching circuit such as a virtual circuit switch. Direction of data flow on each of the bidirectional busses and periodic temporary synchronization of the stations is controlled in response to signals transmitted to the bus by the bus master control circuitry associated with that bus. A bus termination hub switching facility cooperates with the included group of bus master control circuits to interconnect data processing stations onthe various busses with the virtual circuit switch via the trunk line and with each other. The bus termination hub facility further includes bus monitoring, status polling and maintenance facilities. A faulty bus will be disconnected if a fault is discovered, during monitoring intervals. It will remain disconnected until the fault is corrected.

541470

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