Cisco 7246 - uBR Router, Руководство по установке оборудования

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D-3
Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide
OL-5421-03
Appendix D Industry-Standard Wiring Plans
Optical Fiber Color Codes
Optical Fiber Color Codes
The most common color code for optical fiber is based on the 10 colors that are used for plastic insulated
conductor copper cables. Two other colors have been added to bring the optical fiber color code to
twelve. These colors are now standardized under
TIE/EIA-598—Optical Fiber Cable Color Coding .
The coloring specified in TIA/EIA–598 are used to identify individual optical fibers when the colors are
applied to the surface of the coated fiber or included directly in the fiber’s secondary coating. Buffered
fibers have colored plastic buffering jackets. The standard colors also may be used to identify units
(groups of fibers or loose tubes) or ribbons on a given cable. As well, units and ribbons may be identified
with printed markings.
Telephone Wire Color Codes
To help simplify wire management, AT&T has devised a uniform scheme for dealing with large numbers
of wires for the telephone industry. The scheme uses two color codes—one for large numbers of wires
organized in pairs—and the other for smaller numbers of wires that can also be organized in pairs. Cisco
recommends that you try to implement this wiring scheme whenever possible.
For large numbers of wires, each pair is assigned a two-color code. The colors are selected from two
groups of five, resulting in what is called a
binder-group of 25 pairs. The colors used for a group are
white, red, black, yellow, and violet. The colors used for “pair within a group” are blue, orange, green,
brown, and slate.
Each pair must have a unique color combination. One wire within each pair has a solid background of
its group color and stripes of the “pair within a group” color; the second wire has the colors reversed.
Table D-2 lists the sequences. Note that red-brown and red-orange wires may be easily confused.
Table D-1 TIA/EIA–598 Color Code
Position Color
1 Blue
2 Orange
3 Green
4 Brown
5 Slate
6 White
7 Red
8 Black
9 Yellow
10 Violet
11 Rose
12 Aqua