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)
“The man who pretends that the distribution of income in this country reflects the distribution of ability or character is an ignoramus. The man who says that it could by any possible political device be made to do so is an unpractical visionary. But the man who says that it ought to do so is something worse than an ignoramous and more disastrous than a visionary: he is, in the profoundest Scriptural sense of the word, a fool.”
—George Bernard Shaw (1856–1950)
“We are not permitted to choose the frame of our destiny. But what we put into it is ours.”
—Dag Hammarskjöld (1905–1961)