US 2002/0159400 A1Published application

Two-wire ethernet system for digital subscriber line communications

OwnerKyu Ho Park, Hyun Jin Choiinventors

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Abstract

An Ethernet system includes a plurality of LAN cards each of which is embodied in a computing device and a switching hub connected to the LAN cards, each LAN card and the switching hub being connected by one pair of signal lines. In order to perform the data communications between the LAN card and the switching hub through one pair of signal lines, each of the LAN card and the switching hub further includes, in addition to a PHY and a MAC, a first control logic circuit for establishing a data transmission speed, a duplex mode, a link mode and an auto-negotiation activation state to have predetermined states, which are to be stored in the PHY and the MAC, and a second control logic circuit for executing a data collision and loop-back avoidance mechanism.

Claims13

Dependent claims

An Ethernet system for performing data communications between two link partners, which comprises:

a local area network (LAN) card;
a switching hub, connected to the LAN card, for performing the data communications with the LAN card;
and
a pair of signal lines for connecting the LAN card and the switching hub,
wherein the LAN card and the switching hub become the link partners and each of them includes:
a physical layer interface (PHY), containing two output terminals TX+ and TX− and two input terminals RX+ and RX−, for forming an interface with its link partner, wherein the output terminal TX+ and the input terminal RX+ are attached to one of the signal lines and the output terminal TX− and the input terminal RX− are connected to the other of the signal lines;
a controller for transceiving data and control signals with the PHY;
and
a control circuit for establishing a data transmission speed, a duplex mode, a link mode and an auto-negotiation (AN) activation state to be stored in the PHY and the controller.

6 more elements

Dependencies are inferred from the claim text.