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EIA/USOC configuration

 

EIA / TIA (ISDN) STANDARD T568A
PAIR PIN # COLOUR CODE  
T1
R1
T2
R2
T3
R3
T4
R4
5
4
3
6
1
2
7
8
White / Blue
Blue / White
White / Orange
Orange / White
White / Green
Green / White
White / Brown
Brown / White
AT & T  T568B
PAIR PIN # COLOUR CODE  
T1
R1
T2
R2
T3
R3
T4
R4
5
4
1
2
3
6
7
8
White / Blue
Blue / White
White / Orange
Orange / White
White / Green
Green / White
White / Brown
Brown / White
USOC  4 PAIRS
PAIR PIN # COLOUR CODE  
T1
R1
T2
R2
T3
R3
T4
R4
5
4
3
6
2
7
1
8

White / Blue
Blue / White
White / Orange
Orange / White
White / Green
Green / White

White / Brown
Brown / White

 
USOC  1-2-3 PAIRS
PAIR PIN # COLOUR CODE  
T1
R1
T2
R2
T3
R3
4
3
2
5
1
6
White / Blue
Blue / White
White / Orange
Orange / White
White / Green
Green / White

1000 BASE T CROSSOVER cablek cables


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