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MDI port

   Also found in: Wikipedia 0.06 sec.

(Medium Dependent Interface port) Also called an "uplink port," it is a port on a network hub or switch used to connect to other hubs or switches without requiring a crossover cable. The MDI port does not cross the transmit and receive lines, which is done by the regular MDI-X ports that connect to end stations (the X stands for "crossed"). The MDI port connects to the MDI-X port on the other device. There are typically one or two ports on a device that can be toggled between MDI (not crossed) and MDI-X (crossed). See crossover cable.

Crossing Over!
The whole idea is to put the transmitted data onto the receive line of the receiving machine.


MDI/MDI-X Port
One port in a hub or switch typically provides the option of not crossing the lines. On this 10/100 switch from Omnitron, the MDI designations have been replaced with diagrams showing the physical configuration of the lines.



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Automatic-MDI/MDIX crossover for 100BASE-TX and 10BASE-T ports is provided, which simplifies and reduces the cost of networking installation by working with any combination of normal or crossed-over cables with MDI ports (typically in end stations like PCs) and MDIX ports (typically in switches).
Marvell Introduces Industry's First Fully Integrated, `Plug and ... by Business Wire
All the hubs in the SohoBasic family are plug-and-play, with an MDI port for daisy chaining, and an LED display for easy-to-read troubleshooting.
SohoBasic rolls out first 10/100 Mbps products for home and remote ... by Business Wire
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