MDF/lDF DESIGN DEFINITY GENERIC 2 WITH UNIVERSAL MODULES
7-13
1
P
12
500 PR
WIREWAY
13
P
20
––––––––––––
100 PR
24
(SPARE)
Figure 7-6. CPC Wall Field Configuration
Distribution Field
The distribution field uses white labels; it is where all distribution cables terminate. Distribution cables
are the cables that run from the MDF in the equipment room to the IDF in the closets. (They are
sometimes called "house," "backbone," "riser," "campus," or "black" cables. This document calls them
distribution cables.)
The
Premises Distribution System Design Guide
(555-400-602) presents several approaches to sizing the
distribution cables based upon the needs of the customer.
These approaches apply to the sizing of
distribution cables for a Generic 2 universal system, with the following exceptions:
●
Size the distribution cable so that each workstation is allotted a minimum of two cable pairs.
●
Allow the 25th pair in each 25-pair bundle to serve as a spare.
●
Allot three cable pairs for each workstation if the customer requests single-point administration.
●
It is recommended that you terminate large numbers of spare pairs requested by the customer on a
specially designated area of the MDF. This guideline is recommended for efficiency since the spare
pairs artificially increase the size of the distribution field.
Installation Cable Field
The installation cable field uses blue labels; it is where IO cables terminate directly on the MDF.
(Remote-module MDFs require fields labeled purple and blue when installation cables are connected
directly to them.) When the installation cable terminates in the equipment room, size it and plan for its
termination as you would for closet terminations. Allotting one 4-pair D-inside-wiring (DIW) cable for
each workstation. Allot two 4-pair DIW cables for those workstations that use a separate IO for a data
connection.
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