Medium Dependent Interface/Medium Dependent Interface crossover. The switch, also known as Uplink/Normal, located on the back of an OfficeConnect switch or hub that is used to alter the operation of a specific port. The 'X' stands for crossing the transmit and receive lines of a port. An MDI port (Uplink, uncrossed) connects to the MDI-X (Normal, crossed) port of another hub. Also see Hub MDI Port Switch
Medium dependent interface crossover. A repeater or switch port with an internal crossover function that allows the use of a straight-through UTP cable to connect two ports, reversing the transmit and receive connections. An MDI-X connection is typically required when connecting two switches or connecting a repeater to a switch.