A P P E N D I X
Industry-Standard Wiring Plans C-1
Industry-Standard Wiring Plans
C
When you install more than a few terminals, you face the problem of organizing the wiring. AT&T
has devised for the telephone industry a uniform scheme for dealing with large numbers of wires.
The scheme uses two color codes—one for large numbers of wires organized in pairs and the other
for smaller numbers of wires which may also be organized in pairs. We recommend the use of 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 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 group” color, and the second wire has the colors
reversed. Table C-1 lists the sequences. Note that red-brown and red-orange wires can be easily
confused.
Table C-1
Telephone Industry 25-Pair Color Code and Pin Numbers
Pair Number
Wire Number
Solid Color
Stripe Color
Pin Number
1
1
White
Blue
26
1
2
Blue
White
1
2
1
White
Orange
27
2
2
Orange
White
2
3
1
White
Green
28
3
2
Green
White
3
4
1
White
Brown
29
4
2
Brown
White
4
5
1
White
Slate
30
5
2
Slate
White
5
6
1
Red
Blue
31
6
2
Blue
Red
6
7
1
Red
Orange
32
7
2
Orange
Red
7
8
1
Red
Green
33
8
2
Green
Red
8
Summary of Contents for TelePresence Server 7010
Page 10: ...x Cisco 7010 Hardware Installation and Maintenence ...
Page 14: ...iv Cisco 7010 Hardware Installation and Maintenance Document Conventions ...
Page 148: ...3 36 Cisco 7010 Hardware Installation and Maintenance Using the Flash Memory Card ...
Page 158: ...4 10 Cisco 7010 Hardware Installation and Maintenance Troubleshooting the Processor Subsystem ...
Page 242: ...5 84 Cisco 7010 Hardware Installation and Maintenance Replacing Internal Components ...
Page 258: ...A 16 Cisco 7010 Hardware Installation and Maintenance MIP Interface Cable Pinouts ...
Page 270: ...B 12 Cisco 7010 Hardware Installation and Maintenance Interface Processor LEDs ...
Page 274: ...C 4 Cisco 7000 Hardware Installation and Maintenance ...
Page 287: ...Index 13 ...