The STE101P supports both half-duplex and fullduplex operation at 10 and 100 Mbps operation. Its operating mode can be set using autonegotiation, parallel detection or manual control. It also allows for the support of auto-negotiation functions for speed and duplex detection. The Automatic MDI / MDIX feature compensates for using a cross over cable. With Auto MDIX, the STE101P automatically detects what is on the other end of the network cable and switches the TX & RX pins accordingly.