Multiplex communications – Wide area network – Packet switching
Patent
1992-06-05
1995-10-10
Marcelo, Melvin
Multiplex communications
Wide area network
Packet switching
370 8513, 370 941, H04L 1266
Patent
active
054576814
ABSTRACT:
An ATM-Ethernet portal/concentrator permits a transparent interconnection between Ethernet segments over an ATM network to provide remote connectivity for Ethernet segments. The portal includes an Ethernet controller and an ATM cell processor, both of which receive and transmit data to and from a dual port shared memory under control of a direct memory access controller. A control microprocessor monitors and controls the shifting of data through the dual port memory. In this scheme, original data is written and read directly into and out of the dual port memory to thereby eliminate any requirement for copying of data, to thereby significantly increase the data throughput capability of the portal. In the concentrator embodiment, a plurality of Ethernet controllers, each of which is connected to its own associated Ethernet segment, is multiplexed through the concentrator to an ATM network to thereby provide remote connectivity for each of the Ethernet segments.
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Bubenik Richard G.
Costa Pierre
Gaddis Michael E.
Matsuura Noritaka
Marcelo Melvin
SBC Technology Resources Inc.
Washington University
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