-3-
The RJ-45 indicates an 8-wire plug or jack. There
are many standards which dictate which wire pairs
connect to which pins on a plug or jack. Some of
these standards are listed below.
The telephone line analyzer TWT-1 is designed to
test the standard configurations shown in Figure 9.
The
Electronic Industries Association established
this sequence as a “commercial building
specification”.
Shown below are the wire color codes for an
EIA/TIA-568A, shown in Figure 9.
T
3
White / Green
R
3
Green / White
T
2
White / Orange
R
1
Blue / White
T
1
White / Blue
R
2
Orange / White
T
4
White / Brown
R
4
Brown / White
WIRING CONFIGURATIONS
FOR RJ-45 JACKS
EIA/TIA-568A
EIA/TIA 568B
or AT&T 258A
Token Ring
10 Base T
Figure 9
Different Wiring Standards for RJ-45 8-Wire Jacks
Plug
Polarities
+ = Tip
_ = Ring
Figure 11
Shows detail of how the tip and ring are connected on
a eight connector cable for EIA/TIA-568A standards
on Figure 9.
1
2
3
4
5
6
7
8
Figure 12
Shows how the phone wires relate to the LEDs on
the analyzer for EIA/TIA-568A.
PR 1
Wires 4 and 5
PR 2
Wires 3 and 6
PR 4
Wires 7 and 8
PR 3
Wires 1 and 2
PR1
PR2
PR3
PR4
Figure 10
Typical color
scheme for eight
lines.
EIA/TIA-568A
1 8
RJ-45 Jack
Gray
Red
Brown
Green
Blue
Yellow
Black
Red
Black
Orange
Blue
Orange
Gray
Brown
Yellow
Green
