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Main distribution frame (MDF)
A distribution frame on one part of which the external trunk cables entering a facility terminate, and on another part of which the internal user subscriber lines and trunk cabling to any intermediate distribution frames terminate. Note 1: The MDF is used to cross-connect any outside line with any desired terminal of the multiple cabling or any other outside line. Note 2: The MDF usually holds central office protective devices and functions as a test point between a line and the office. Note 3: The MDF in a private exchange performs functions similar to those performed by the MDF in a central office. Synonym (in telephony) main frame.
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- Part of Speech: noun
- Synonym(s):
- Blossary:
- Industry/Domain: Telecommunications
- Category: General telecom
- Company: ATIS
- Product:
- Acronym-Abbreviation:
Other Languages:
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