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[?].
Source: from Federal Standard 1037C and from MIL-STD-188
... gestis (Fetmo, 1803)
Hefele, Conciliengeschichte, vol. vii. (Freiburg-im-Breisgau, 1874)
0. Richter, Die Organisation and Geschäftsordnung des Basler Konziis ...
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