Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent
1997-07-28
1999-11-23
Jung, Min
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
370445, 370463, H04L 12413
Patent
active
059913037
ABSTRACT:
A multi-communication rate switching physical device for a port of a mixed communication rate Ethernet repeater network. The present invention includes a physical device for recovering bits from a wire connection (e.g., fiber, twisted pair, etc.) that is coupled to computer system adapter. The physical device can be implemented on a single chip integrated within an Ethernet repeater hub within each hub port. The physical device chip of the invention includes a front end multiplexer coupled to channel information between a 10 Base T physical device circuit and a 100 Base T physical device circuit, depending on the result of an auto-negotiation circuit also on the physical device chip. The physical device chip also advantageously employs a second, back end multiplexer, that is coupled to channel data between either the 10 Base T physical device circuit or the 100 Base T physical device circuit and one of a multiple of media independent interfaces (MIIs). The back end multiplexer is controlled by a combination of signals including the auto-negotiation circuit result and a system management interface override signal. By providing multiple MII (or giga MII) interface connections, the invention provides a low cost solution to allow the associated port to be automatically associated with a number of different collision domains within the Ethernet network. Port assignment to one domain or another is flexible and can be based on: (1) the result of an auto-negotiation session; (2) a manual override; or (3) detected errors in the fastest attempted rate.
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patent: 5754540 (1998-05-01), Liu et al.
patent: 5754552 (1998-05-01), Allmond et al.
patent: 5771237 (1998-06-01), Kao
patent: 5896417 (1999-04-01), Lau
Conexant Systems Inc.
Jung Min
King Joseph W.
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