Ethernet automatic media selection logic

Details Ethernet automatic media selection logic Ethernet automatic media selection logic

2006-04-07

2009-12-29

Abelson, Ronald (Department: 2419)

Multiplex communications

Pathfinding or routing

Through a circuit switch

C370S384000, C370S469000

Reexamination Certificate

active

07639675

ABSTRACT:
A network device includes a media access controller (MAC) and a physical layer having an interface that communicates with the MAC. A first autonegotiation circuit attempts to establish a link using a first transceiver over a first media. A second autonegotiation circuit attempts to establish a link using a second transceiver over a second media. A media selector communicates with the interface and the first and second autonegotiation circuits. The media selector enables data flow from the first media to the MAC using the interface when a link is established first over the first media. The media selector enables data flow from the second media to the MAC using the interface when a link is established first over the second media.

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IEEE Stadard 802.3, Local and Metropolitan Area Networks: Physical Layer Link Signaling for 10 Mb/s, and 1000 Mb/s Auto-Negotiation on Twisted Pair, 2000 Edition, pp. 698-745; and pp. 1009-1033.
IEEE Standard 802.3 Edition, Local and Metropolitan Area Networks: Sections 28-38, pp. 698-1033.

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