Redundancy arrangement for a local area network

Details Redundancy arrangement for a local area network Redundancy arrangement for a local area network

1985-03-11

1987-04-14

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 85, H04J 116, H04J 302

Patent

active

046583963

ABSTRACT:
A local area network for a multiple access communication system includes a bidirectional communication bus for providing a bidirectional transmitting medium for data signals. The bus includes at least two segments for providing alternate paths for the data signals. A plurality of stations are connected to the bus. Each station includes transceiver means for transmitting data signals onto the bus and for receiving data signals from the bus. A plurality of controllable switch means are provided each being connected for selectively disabling at least one of the transmitting and receiving functions of a respective one of the transceiver means. The transceiver means include first and second groups of transceiver means. Each group is connected to a respective one of the two bus segments. A central control means is connected to each controllable switch means and has a first mode for causing the plurality of controllable switch means to disable at least one of the transmitting and receiving functions of each transceiver means in only the first group and a second mode for causing the plurality of controllable switch means to disable at least one of the transmitting and receiving functions of each transceiver means in only the second group.

REFERENCES:
patent: 3924077 (1975-12-01), Blakeslee
patent: 4063220 (1977-12-01), Metcalfe et al.
patent: 4099024 (1978-07-01), Boggs et al.
patent: 4129750 (1978-12-01), Mattern
patent: 4423506 (1983-12-01), Kawasaki et al.
patent: 4545049 (1985-10-01), Kammerer et al.
patent: 4568930 (1986-02-01), Livingston et al.
patent: 4608685 (1986-08-01), Jain et al.

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