Multiplex communications – Wide area network – Packet switching
Patent
1989-06-09
1991-01-29
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
455 88, 3408255, H04J 304, H04B 138
Patent
active
049892037
ABSTRACT:
A communication system which includes a modem and a plurality of controllers has each controller connected to the modem by an interface apparatus, each controller and the modem complying with a predetermined protocol. The interface apparatus comprises a first component, a bus, which provides a medium to transfer signals between the controllers and the modem. A second component provides an arbitration path between said controllers. A first interface unit, which interfaces the modem to the bus, implements a modem-associated multi-state state machine and responds to signals on the bus maintaining the predetermined protocol between the modem and the first interface unit. A plurality of second interface units interface a corresponding controller to the bus. Each second interface unit implements a controller-associated multi-state state machine which responds to signals on the second component and further responds to signals from the corresponding controller, each second interface unit maintaining the predetermined protocol between the second interface unit and the corresponding controller.
REFERENCES:
patent: 4805168 (1989-02-01), Kata
Bocure Tesfaldet
Honeywell Inc.
Lenkszus D. J.
Medved A.
Safourek Benedict V.
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