Multi-protocol local area network controller

Details Multi-protocol local area network controller Multi-protocol local area network controller

1994-11-04

1998-07-21

Rinehart, Mark H.

Multiplex communications

Wide area network

Packet switching

395860, 370463, 370466, G06F 1342, H04L 1228

Patent

active

057845735

ABSTRACT:
A local area network ("LAN") controller operable in an IEEE 802.3u network and an IEEE 802.12 network. A common physical connector is used for both standards, attached to an attachment medium such as a card. An 802.3u circuit is attached to the card, implementing the following 802.3u functions: A media access controller ("MAC") layer, and a physical media independent ("PMI") layer that provides the IEEE 802.3u media independent interface ("MII"). An 802.12 circuit is also attached to the card, implementing the following IEEE 802.12 functions: An LLC layer, an MAC layer, and a PMI layer, providing an MII to a device implementing an 802.12 physical media dependent ("PMD") layer. A circuit coupled to the 802.12 circuit multiplexes, according to a predetermined strategy, 802.12 PMI to PMD signals over the physical connector and, alternatively, communicates 802.3u MII signals between the 802.3u circuit and the physical connector.

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EETImes; "Brooktree, DEC, TI Tip Plans to Support 100-MBit/S Spec: Three get behind Fast Ethernet"; Issue 812, Aug. 29, 1994.
CommunicationsWeek; "Compaq TI Team Up Thunder--LAN to handle new and old LAN types"; Issue 521, Aug. 29, 1994.

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