In
telecommunication, a combined distribution frame (CDF) is a
distribution frame that combines the functions of
main and
intermediate distribution frame
An intermediate distribution frame (IDF) is a distribution frame in a central office or customer premises, which cross connects the user cable media to individual user line circuits and may serve as a distribution point for multipair cables f ...
s 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
Line most often refers to:
* Line (geometry), object with zero thickness and curvature that stretches to infinity
* Telephone line, a single-user circuit on a telephone communication system
Line, lines, The Line, or LINE may also refer to:
Arts ...
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.
References
Broadcast engineering
Telephony equipment
{{telephony-stub