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Cablek industries Services News Technical reference

Telco cabling

 


TELCO - WIRING CHART & COLOUR CODES
25 PAIR CABLE
COLOR CODE
TELCO
PIN #
USOC WIRING RJ11 6P4C USOC
WIRING
RJ11
6P6C
USOC
WIRING
RJ61X
8P8C
E.I.A
568-B
WIRING
RJ45
8P8C
ATT
E.I.A
568-A
WIRING
RJ45
8P8C
ISDN
10BASE-T
WIRING
RJ45
8P8C
356A
WIRING
RJ45
8P8C
DEC
WIRING
MMJ
6P4C
DEC
WIRING
MMJ
6P6C
White/Blue
Blue/White
White/Orange
Orange/White
White/Green
Green/White
White/Brown
Brown/White
White/Slate
Slate/White
Red/Blue
Blue/Red
Red/Orange
Orange/Red
Red/Green
Green/Red
Red/Brown
Brown/Red
Red/Slate
Slate/Red
Black/Blue
Blue/Black
Black/Orange
Orange/Black
Black/Green
Green/Black
Black/Brown
Brown/Black
Black/Slate
Slate/Black
Yellow/Blue
Blue/Yellow
Yellow/Orange
Orange/Yellow
Yellow/Green
Green/Yellow
Yellow/Brown
Brown/Yellow
Yellow/Slate
Slate/Yellow
Violet/Blue
Blue/Violet
Violet/Orange
Orange/Violet
Violet/Green
Green/Violet
Violet/Brown
Brown/Violet
Violet/Slate
Slate/Violet

# Of Modular
Jacks Per
Telco Connect'r

26
1
27
2
28
3
29
4
30
5
31
6
32
7
33
8
34
9
35
10
36
11
37
12
38
13
39
14
40
15
41
16
42
17
43
18
44
19
45
20
46
21
47
22
48
23
49
24
50
25
4
3
2
5
4
3
2
5
4
3
2
5
4
3
2
5
4
3
2
5
4
3
2
5
4
3
2
5
4
3
2
5
4
3
2
5
4
3
2
5
4
3
2
5
4
3
2
5
-
-

12

4
3
2
5
1
6
4
3
2
5
1
6
4
3
2
5
1
6
4
3
2
5
1
6
4
3
2
5
1
6
4
3
2
5
1
6
4
3
2
5
1
6
4
3
2
5
1
6
-
-

8

5
4
3
6
2
7
1
8
5
4
3
6
2
7
1
8
5
4
3
6
2
7
1
8
5
4
3
6
2
7
1
8
5
4
3
6
2
7
1
8
5
4
3
6
2
7
1
8
-
-

6

5
4
1
2
3
6
7
8
5
4
1
2
3
6
7
8
5
4
1
2
3
6
7
8
5
4
1
2
3
6
7
8
5
4
1
2
3
6
7
8
5
4
1
2
3
6
7
8
-
-

6

5
4
3
6
1
2
7
8
5
4
3
6
1
2
7
8
5
4
3
6
1
2
7
8
5
4
3
6
1
2
7
8
5
4
3
6
1
2
7
8
5
4
3
6
1
2
7
8
-
-

6

1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
-
-

12
5
4
1
2
3
6
5
4
1
2
3
6
5
4
1
2
3
6
5
4
1
2
3
6
5
4
1
2
3
6
5
4
1
2
3
6
5
4
1
2
3
6
5
4
1
3
3
6
-
-

8

3
2
4
5
3
2
4
5
3
2
4
5
3
2
4
5
3
2
4
5
3
2
4
5
3
2
4
5
3
2
4
5
3
2
4
5
3
2
4
5
3
2
4
5
3
2
4
5
-
-

12

3
2
4
5
1
6
3
2
4
5
1
6
3
2
4
5
1
6
3
2
4
5
1
6
3
2
4
5
1
6
3
2
4
5
1
6
3
2
4
5
1
6
3
2
4
5
1
6
-
-

8
Note: The correlation between pin number and lead wire color may vary differing modular jacks, depending on the application.
Therefore, always refer to pin number and position rather than lead wire color.


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