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media independent interface (MII)

The Media Independent Interface (MII) was originally the interface between the media access method of Fast Ethernet with the physical transmission medium

.In contrast to the Medium Dependent Interface (MDI) used in normal Ethernet, the MII interface is uniformly pronounced for the different physical media and supports data transmission speeds of 10 Mbit/s

and100 Mbit/s and also provides a management interface for monitoring and configuring

thelower layers

.The media independence of the interface means that components with different physical media - TP cable, optical fiber

, etc. - can be connected to it without having to redesign the MAC hardware.- without the need to redesign the MAC hardware. The MII interface of Fast Ethernet is equivalent to the AUI interface in Ethernet. The Medium Independent Interface supports the classic data rate of 10 Mbps as well as that of Fast Ethernet with 100 Mbps. The clock rate is 25 MHz, the number of pins 16. The MII interface can be located both inside and outside network components. With the R version, Reduced Media Independent Interface

(RMII), there is a version with half the number of pins and data lines.

The MII interface of Fast Ethernet

The MII interface of Fast Ethernet

Various variants for the Ethernet versions with higher data rates have emerged from the Media Independent Interface. Thus Gigabit Media Independent Interface (GMII), Reduced Gigabit Media Independent Interface (RMII), Serial Gigabit Media Independent Interface (SGMII), 10 Gigabit Media Independent Interface (XGMII), 10 Gigabit Attachment Unit Interface (XAUI) as well as some small form factor variants.

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Englisch: media independent interface - MII
Updated at: 23.04.2015
#Words: 355
Translations: DE