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EIA/TIA-568A and 568B pinouts
Pin
T568A Pair
T568B Pair
1000BASE-T Signal ID
Wire
T568A Color
T568B Color
Pins on plug face (socket is reversed)
1
3
2
DA
tip
white/green stripe
white/orange stripe
2
3
2
DA-
ring
green solid
orange solid
3
2
3
DB
tip
white/orange stripe
white/green stripe
4
1
1
DC
ring
blue solid
blue solid
5
1
1
DC-
tip
white/blue stripe
white/blue stripe
6
2
3
DB-
ring
orange solid
green solid
7
4
4
DD
tip
white/brown stripe
white/brown stripe
8
4
4
DD-
ring
brown solid
brown solid
RJ45 to balanced audio/XLR
Pin
Analog signal
AES/EBU
T568A Color
T568B Color
Pins on plug face (socket is reversed)
1
L
AES
white/green stripe
white/orange stripe
2
L-
AES-
green solid
orange solid
3
R
n/c
white/orange stripe
white/green stripe
4
Gnd
Gnd
blue solid
blue solid
5
n/c
n/c
white/blue stripe
white/blue stripe
6
R-
n/c
orange solid
green solid
7
-15
-15
white/brown stripe
white/brown stripe
8
15
15
brown solid
brown solid
Power over Ethernet, IEEE 802.3af standards A and B
PINS on Switch
T568A Color
T568B Color
10/100 DC on Spares (mode B)
10/100 Mixed DC & Data (mode A)
1000 (1 Gigabit) DC & Bi-Data (mode B)
1000 (1 Gigabit) DC & Bi-Data (mode A)
Pin 1
white/green stripe
white/orange stripe
Rx
Rx DC
TxRx A
TxRx A DC
Pin 2
green solid
orange solid
Rx -
Rx - DC
TxRx A -
TxRx A - DC
Pin 3
white/orange stripe
white/green stripe
Tx
Tx DC -
TxRx B
TxRx B DC -
Pin 4
blue solid
blue solid
DC
unused
TxRx C DC
TxRx C
Pin 5
white/blue stripe
white/blue stripe
DC
unused
TxRx C - DC
TxRx C -
Pin 6
orange solid
green solid
Tx -
Tx - DC -
TxRx B -
TxRx B - DC -
Pin 7
white/brown stripe
white/brown stripe
DC -
unused
TxRx D DC -
TxRx D
Pin 8
brown solid
brown solid
DC -
unused
TxRx D - DC -
TxRx D -
Ethernet crossover cables
Two pairs crossed, two pairs uncrossed 10BASE-T or 100BASE-TX crossover
Pin
Connection 1: T568A
Connection 2: T568B
Pins on plug face
signal
pair
color
signal
pair
color
1
BI_DA
3
white/green stripe
BI_DB
2
white/orange stripe
2
BI_DA-
3
green solid
BI_DB-
2
orange solid
3
BI_DB
2
white/orange stripe
BI_DA
3
white/green stripe
4
1
blue solid
1
blue solid
5
1
white/blue stripe
1
white/blue stripe
6
BI_DB-
2
orange solid
BI_DA-
3
green solid
7
4
white/brown stripe
4
white/brown stripe
8
4
brown solid
4
brown solid
Gigabit T568A crossover All four pairs crossed 10BASE-T, 100BASE-TX, 100BASE-T4 or 1000BASE-T crossover (shown as T568A)
Pin
Connection 1: T568A
Connection 2: T568A Crossed
Pins on plug face
signal
pair
color
signal
pair
color
1
BI_DA
3
white/green stripe
BI_DB
2
white/orange stripe
2
BI_DA-
3
green solid
BI_DB-
2
orange solid
3
BI_DB
2
white/orange stripe
BI_DA
3
white/green stripe
4
BI_DC
1
blue solid
BI_DD
4
white/brown stripe
5
BI_DC-
1
white/blue stripe
BI_DD-
4
brown solid
6
BI_DB-
2
orange solid
BI_DA-
3
green solid
7
BI_DD
4
white/brown stripe
BI_DC
1
blue solid
8
BI_DD-
4
brown solid
BI_DC-
1
white/blue stripe
Gigabit T568B crossover All four pairs crossed 10BASE-T, 100BASE-TX, 100BASE-T4 or 1000BASE-T crossover (shown as T568B)
Pin
Connection 1: T568B
Connection 2: T568B Crossed
Pins on plug face
signal
pair
color
signal
pair
color
1
BI_DA
2
white/orange stripe
BI_DB
3
white/green stripe
2
BI_DA-
2
orange solid
BI_DB-
3
green solid
3
BI_DB
3
white/green stripe
BI_DA
2
white/orange stripe
4
BI_DC
1
blue solid
BI_DD
4
white/brown stripe
5
BI_DC-
1
white/blue stripe
BI_DD-
4
brown solid
6
BI_DB-
3
green solid
BI_DA-
2
orange solid
7
BI_DD
4
white/brown stripe
BI_DC
1
blue solid
8
BI_DD-
4
brown solid
BI_DC-
1
white/blue stripe
Registered Jack (RJ) 11, 14, 25
Position
Pair
T/R
±
RJ11
RJ14
RJ25
25-pair color code
U.S. Bell System colors
German colors
Australian colors
1
3
T
T3
white/green
white
violet
orange
2
2
T
T2
T2
white/orange
black
green
red
3
1
R
−
R1
R1
R1
blue/white
red
white
blue
4
1
T
T1
T1
T1
white/blue
green
brown
white
5
2
R
−
R2
R2
orange/white
yellow
yellow
black
6
3
R
−
R3
green/white
blue
slate
green
Registered Jack (RJ) 21/21X
Color
Pin (Tip)
Pin (Ring)
Color
White/Blue
26
1
Blue/White
White/Orange
27
2
Orange/White
White/Green
28
3
Green/White
White/Brown
29
4
Brown/White
White/Slate
30
5
Slate/White
Red/Blue
31
6
Blue/Red
Red/Orange
32
7
Orange/Red
Red/Green
33
8
Green/Red
Red/Brown
34
9
Brown/Red
Red/Slate
35
10
Slate/Red
Black/Blue
36
11
Blue/Black
Black/Orange
37
12
Orange/Black
Black/Green
38
13
Green/Black
Black/Brown
39
14
Brown/Black
Black/Slate
40
15
Slate/Black
Yellow/Blue
41
16
Blue/Yellow
Yellow/Orange
42
17
Orange/Yellow
Yellow/Green
43
18
Green/Yellow
Yellow/Brown
44
19
Brown/Yellow
Yellow/Slate
45
20
Slate/Yellow
Violet/Blue
46
21
Blue/Violet
Violet/Orange
47
22
Orange/Violet
Violet/Green
48
23
Green/Violet
Violet/Brown
49
24
Brown/Violet
Violet/Slate
50
25
Slate/Violet
Registered Jack (RJ) 48 48X
Pin
Pair
Signal
Color
1
R
RX Ring
Orange/White
2
T
RX Tip
White/Orange
3
reserved
White/Green
4
R1
TX Ring
Blue/White
5
T1
TX Tip
White/Blue
6
reserved
Green/White
7
shield
White/Brown
8
shield
Brown/White
T-1 (DS-1, DSX-1) cross over cable
Two pairs crossed, two pairs uncrossed T1 crossover