Multiplex communications – Wide area network – Packet switching
Patent
1984-06-01
1991-01-15
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370124, H04J 102
Patent
active
049858920
ABSTRACT:
A Local Area Network (LAN) is disclosed which enables a generalized data communication facility to be established over ordinary telephone wiring. The disclosed technique provides a completely general LAN architecture with any access protocol and is well suited to CSMA/CD (carrier sense, multiple access with collision detection). The invention consists of architectural and circuit techniques which enable the construction of a local area network(s) (LAN) over ordinary wiring within a building or between buildings within a short distance of each other (often called a campus). The LAN is implemented without disturbing the normal voice function of the telephone circuits and without the need to string addirional wiring. Implementing a LAN in accordance with this invention only requires three types of hardware functional elements (in the appropriate quantities for the application): (a) a Node Unit (NU), (b) Repeater Unit (RU), and (c) depending on the size of the network, possibly a Pulse Regenerator Unit (PRU).
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Cunha Robert E.
Marcelo Melvin
Olms Douglas W.
Xerox Corporation
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