Cisco 7246 - uBR Router, Hardware Installation Manual

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D-5
Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide
OL-5421-03
Appendix D Industry-Standard Wiring Plans
Telephone Wire Color Codes
Cables with more than 25 pairs of wires are constructed from 25-pair groups. Very large cables have
other variations generally not encountered inside terminal wire plants.
For small wiring groups, such as wires for an individual telephone station or terminal, you may use a
second color-code scheme.
Table D-2 lists this color code and the usual correspondence with the
paired-wire color code. The alternate color code is included, because sometimes the station wire uses
the first three pairs of the standard color code (white-blue, blue-white, and so on), while other times it
uses the six alternate color wires.
19 1 Yellow Brown 44
19 2 Brown Yellow 19
20 1 Yellow Slate 45
20 2 Slate Yellow 20
21 1 Violet Blue 46
21 2 Blue Violet 21
22 1 Violet Orange 47
22 2 Orange Violet 22
23 1 Violet Green 48
23 2 Green Violet 23
24 1 Violet Brown 49
24 2 Brown Violet 24
25 1 Violet Slate 50
25 2 Slate Violet 25
Table D-2 Telephone Industry 25-Pair Color Code and Pin Numbers (continued)
Pair Number Wire Number Solid Color Stripe Color Pin Number
Table D-3 Alternate Color-Code Scheme for Smaller Numbers of Wires
Pair Number Wire Number Solid Color Stripe Color Alternate Color Pin Number
1 1 White Blue Green 4
1 2 Blue White Red 3
2 1 White Orange Black 2
2 2 Orange White Yellow 5
3 1 White Green White 1
3 2 Green White Blue 6