No obycajny RTL8139C (http://www.realtek.com.tw/products/p...aspx?modelid=6) ani RTL8139D (http://www.realtek.com.tw/products/p...spx?modelid=10) to nepodporuje. Ale RTL8139C+ (http://www.realtek.com.tw/products/p...aspx?modelid=7) ma MII (Media Independent Interface) a cez to tam moze byt pripojeny transceiver, ktory to podporuje - napr. RTL8201BL (http://www.realtek.com.tw/products/p...odelid=2003073 - auto crossover detection).