CTREF Ethernet Verschaltung

Hi,

kann mir jmd von euch sagen, wie man so ein Signal (GbitE0_CTREF) vom 
Transformator (Ethernet) richtig verschaltet? am Phy???


Hier mal die Erklärung für dieses Signal:

"Reference voltage for carrier board
Ethernet channel 0 magnetics center tap.
The reference voltage is determined by the
requirements of the module's PHY and
may be as low as 0V and as high as 3.3V.
The reference voltage output should be
current limited on the module. In a case in
which the reference is shorted to ground,
the current must be limited to 250mA or
less."


Nur leider hab ich es noch nicht ganz verstanden:

Gruß
Reinhard