In telecommunication, a combined distribution frame (CDF) is a distribution frame that combines the functions of main and intermediate distribution frames and contains both vertical and horizontal terminating blocks.
The vertical blocks are used to terminate the permanent outside lines entering the station. Horizontal blocks are used to terminate inside plant equipment. This arrangement permits the association of any outside line with any desired terminal equipment. These connections are made either with twisted pair wire, normally referred to as jumper wire, or with optical fiber cables, normally referred to as jumper cables.
In technical control facilities, the vertical side may be used to terminate equipment as well as outside lines. The horizontal side is then used for jackfields and battery terminations.
Famous quotes containing the words combined, distribution and/or frame:
“Pregnant women! They had that weird frisson, an aura of magic that combined awkwardly with an earthy sense of duty. Mundane, because they were nothing unique on the suburban streets; ethereal because their attention was ever somewhere else. Whatever you said was trivial. And they had that preciousness which they imposed wherever they went, compelling attention, constantly reminding you that they carried the future inside, its contours already drawn, but veiled, private, an inner secret.”
—Ruth Morgan (1920–1978)
“There is the illusion of time, which is very deep; who has disposed of it? Mor come to the conviction that what seems the succession of thought is only the distribution of wholes into causal series.”
—Ralph Waldo Emerson (1803–1882)
“The warped, distorted frame we have put around every Negro child from birth is around every white child also. Each is on a different side of the frame but each is pinioned there. And ... what cruelly shapes and cripples the personality of one is as cruelly shaping and crippling the personality of the other.”
—Lillian Smith (1897–1966)