Medium Density Fiberboard - cheap wood substitute made of compressed saw dust.

MDF stands for the main distribution facility, usually the biggest, but more certainly the most important, wiring closet. This is usually located at a central point in a star topology network that is then branched off into other wiring closets; routers, patch panels and hubs can usually be located here. An MDF must comply to the ANSI/TIA/EIA-569-A rules governing wiring closets and are usually located close to the POP (point of presence).

2002.11.19@11:24 spiregrain says re mdf: I've normally heard MDF=main distribution frame, where two-pair telephony connections are provided.

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