Reversible media independent interface

Details Reversible media independent interface Reversible media independent interface

1997-01-31

1999-11-30

Nguyen, Chau

Multiplex communications

Channel assignment techniques

Details of circuit or interface for connecting user to the...

370469, H04L 1200

Patent

active

059955147

ABSTRACT:
A reversible media independent interface (MII) circuit is disclosed. The MII circuit comprises a first management circuit and a second management circuit. The first management circuit is operating in a first mode, the first mode being an interface between the MII and a media access control (AC) device. The second management circuit is operating in a second mode, the second mode being an interface between the MII and a physical layer (PHY) device. The MII circuit also includes a plurality of signals being provided to and sent from the MII circuit. A first portion of the plurality of signals are operable within either a physical layer device in a first mode or a media access control device in a second mode. A second portion of the plurality of the signals are provided the first management circuit and the second management circuit. The second portion of the plurality of signals are modifiable such that they are operable within the first management circuit in the first mode and are operable within the second management circuit in the second mode. In one embodiment by allowing the portion of the plurality of signals to be in a first and second mode (i.e., forward or reverse). The MII interface can be reversed such that it looks likes the MII interface found on either the PHY or MAC device. Accordingly, then either the MAC device can then be connected directly to the repeater without any PHYs or vice versa.

REFERENCES:
patent: 5673254 (1997-09-01), Crayford
patent: 5734675 (1998-03-01), Leonowich
patent: 5784559 (1998-07-01), Frazier
The IEEE Standard Dictionary of Electrical and Electronics Terms--Sixth Edition IEEE STD 100-1996, ISBN 1-55937-833-6, Dec. 1996.

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