![]() ![]() Reduced Gigabit Media Independent Interface Table 1 Overview Media Independent Interface MII The standardized interface between the first two OSI-layers is called Media Independent Interface (MII) and is independent of the physical layer. ![]() We provide 10Base-T and 100Base-TX (Fast Ethernet) on our Colibri Modules and 1000Base-T (Gigabit) on the Apalis modules. In accordance with the specific kind of the media, the signals are transformed and sent to the next layer of the OSI-model, the Data Link Layer. ![]() Different physical media have different characteristics. The electrical signals first encounter the Medium Dependent Interface (MDI) of the PHY, a part of the Physical layer. This device converts analog signals from the medium to digital signals for the processor and vice versa. Signals typically arrive through a twisted pair copper cable to an Ethernet jack with magnetics on our Carrier Board, then continue through impedance matched differential traces on the PCB to the Ethernet PHY IC. Figure 1 OSI Reference Model from IEEE Standard for Ethernet ![]()
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