What is MII
Posted in Networking on January 7th, 2008 by BanbanliThe Media Independent Interface (MII) is a standard interface used to connect a Fast Ethernet MAC-block to a PHY. The MII may connect to an external transciever device via a pluggable connector or simply connect two chips on the same printed circuit board. Being media independent means that any of several different types of PHY devices can be used without redesigning or replacing the MAC hardware. The equivalents of MII for other speeds are AUI (for 10 megabit Ethernet), GMII (for gigabit Ethernet), and XAUI (for 10 gigabit Ethernet).
http://en.wikipedia.org/wiki/Media_Independent_Interface