Mdf definition

A distribution frame on one side of which main cable connect and on the other side of which lesser cable connect. An MDF may connect external lines and trunks from the public network on one side and internal cables on the other. In an end user environment, an MDF may connect lines and trunks from the public network on one side, or perhaps cables from a PBX, and on the other side connect internal cables connecting to intermediate distribution frames, terminal blocks, or directly to terminals within the customer premises. Short jumpers connect one side to the other. In a telecommunications environment, network trunks terminate on one side and local loop lines on the other. The MDF incorporates protectors for protection against power spikes and surges, and serves as a test point. See also distribution frame, frame, and IDF.
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