Computer Hardware Terms, Glossary and Dictionary

Medium Dependent Interface (MDI) is an Ethernet port connection that allows network hubs or switches to connect to other hubs or switches without a null-modem, or crossover, cable. In the case of thick coaxial Ethernet, the most commonly used MDI is a type of clamp that is installed directly onto the coaxial cable. For twisted-pair Ethernet, the MDI is an eight-pin connector, which is also referred to as an RJ-45 telephone-style jack. The eight-pin jack provides a connection to the four twisted-pair wires used to carry network signals in the 10-Mbps twisted-pair media system.

Related Terms

MDI: Medium Dependent Interface