Multiplex communications – Wide area network – Packet switching
Patent
1980-09-30
1984-09-04
Brigance, Gerald L.
Multiplex communications
Wide area network
Packet switching
370 89, 370 95, 34082505, H04J 316
Patent
active
044701403
ABSTRACT:
A communications system includes a transmission medium for carrying signals divided into frames, with each frame being divided into time slots. At least three interface units interface selected equipment to the transmission medium. Each of the at least three interface units is capable of receiving selected signals carried on the transmission system and of delivering intermediate signals derived from these selected signals to a corresponding one of the selected equipment, and of transmitting second signals to the transmission medium. Each of the interface units is connected in parallel to the transmission medium such that the failure of one or more of the interface units does not prevent the remaining interface units from operating. To make possible the parallel connections, common timing references are provided for the transmit line and common timing references are also provided for the receive line.
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Brigance Gerald L.
Caserza Steven F.
Franklin Richard
MacPherson Alan H.
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