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Questions about the electrical implementation of Ethernet; ask another Stack Exchange for software or protocol questions. Specify the speed as 10/100BASE-T is somewhat different from 1000BASE-T, apart form the speed. Those are copper standards; Ethernet over fiber optical cable is also defined.

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Why this evaluation board use different track impedance than the right one? Ethernet PHY, ro...

Im doing a design with a implementation of 1Gb ethernet switch, for that I bought a evaluation board to do it well. … impedance used to link the output of the chip (which has the PHY interface integrated) to the RJ45 connector is different than the right one which is suposed to be 100ohms as many routing guidelines for Ethernet
Jesús Álvarez's user avatar