Intermediate distribution frame
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Intermediate distribution frame (IDF): In a central office or customer premises, a frame that (a) cross-connects the user cable media to individual user line circuits and (b) may serve as a distribution point for multipair cables from the main distribution frame (MDF) or combined distribution frame (CDF) to individual cables connected to equipment in areas remote from these frames.(www.tiaonline.org)
IDFs are used, but are not limited to, telephone exchange central office, customer-premise equipment, Wide Area Network (WAN), and Local Area Network (LAN) environments.
In central office environments the IDF may contain circuit termination equipment from various auxiliary components. In WAN and LAN environments IDFs, can hold devices of different types including, but not limited to, backup systems (Hard Drives or other media as self-contained or as Raid Arrays, CD-ROM, etc.), Networking (Switches, Hubs, Routers), and Connections (Fiber Optics, coaxial, category cables) and so on.
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This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C".
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