Ethernet MDI signal termination

From: "Roger" <rogerwilson@xxxxxxxxxxx>
Date: Fri, 27 Jun 2008 22:01:11 +0100

The paired MDI signals from the PHY to the magnetics in a GbE application are each terminated by a 50R resistor and then together to a 10nF capacitor to GND. However some applications connect the 2 resistors to Vcc (2.5V) as well. Can anyone explain why some configurations are like this and others aren't? Is it something specific to the magnetics?

TIA,

Rog.

.

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MDI termination
... The paired MDI signals from the PHY to the magnetics in a GbE application ... are each terminated by a 50R resistor and then together to a 10nF capacitor ...
(comp.dcom.lans.ethernet)
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