Digi NS9750 - Manual (Page 339)

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Ethernet Communication
Module
C H A P T E R 6
T
he Ethernet Communication module consists of an Ethernet Media Access
Controller (MAC) and Ethernet front-end module. The Ethernet MAC interfaces to an
external PHY through one of two industry-standard interfaces: MII and RMII. The
Ethernet front-end module provides all of the control functions to the MAC.