Straight-Through Cable Pin Out for T568A
RJ45 Pin # Wire Color Wire Diagram 10Base-T Signal 1000Base-T Signal
(T568A) (T568A) 100Base-TX Signal
1 White/Green
white/green
Transmit+ BI_DA+
2 Green
green
Transmit- BI_DA-
3 White/Orange
white/orange
Receive+ BI_DB+
4 Blue
blue
Unused BI_DC+
5 White/Blue
white/blue
Unused BI_DC-
6 Orange
orange
Receive- BI_DB-
7 White/Brown
white/brown
Unused BI_DD+
8 Brown
brown
Unused BI_DD
Straight-Through Cable Pin Out for T568B
RJ45 Pin # Wire Color Wire Diagram 10Base-T Signal 1000Base-T Signal
(T568B) (T568B) 100Base-TX Signal
1 White/Orange
white/orange
Transmit+ BI_DA+
2 Orange
orange
Transmit- BI_DA-
3 White/Green
white/green
Receive+ BI_DB+
4 Blue
blue
Unused BI_DC+
5 White/Blue
white/blue
Unused BI_DC-
6 Green
green
Receive- BI_DB-
7 White/Brown
white/brown
Unused BI_DD+
8 Brown
brown
Unused BI_DD-
Cross Over Cable Pin Outs
RJ45 Pin # (END 1) Wire Color Diagram End #1 RJ45 Pin # (END 2) Wire Color Diagram End #2
1 White/Orange
white/orange
1 White/Green
white/green
2 Orange
orange
2 Green
green
3 White/Green
white/green
3 White/Orange
white/orange
4 Blue
blue
4 White/Brown
white/brown
5 White/Blue
white/blue
5 Brown
brown
6 Green
green
6 Orange
orange
7 White/Brown
white/brown
7 Blue
blue
8 Brown
brown
8 White/Blue
white/blue
Power over Ethernet Power Delivery (PoE)
RJ45 Pin # Wire Color Wire Diagram 10Base-T Signal PoE
(T568A) (T568A) 100Base-TX Signal
1 White/Green
white/green
Transmit+ Mode A +
2 Green
green
Transmit- Mode A +
3 White/Orange
white/orange
Receive+ Mode A -
4 Blue
blue
Unused Mode B +
5 White/Blue
white/blue
Unused Mode B +
6 Orange
orange
Receive- Mode A -
7 White/Brown
white/brown
Unused Mode B -
8 Brown
brown
Unused Mode B -
Protocol Details:
  Frequency (MHz) Symbol Encoding Signal Rate (Mbaud) Symbol Rate Data Encoding Data Bits per Symbol Pairs per Channel Pairs Used Minimum Cable Category
10BaseT 10 Manchester 10 10 None 1 1 2 3
100BaseT4 12.5 Multi-level, 2T/Hz 25 25 8B6T 6-Aug 3 4 3
100BaseTX 31.25 MLT-3 125 125 4B5B 5-Apr 1 2 5
100BaseT2 12.5 PAM5x5 (2D-PAM5) 25 12.5 None 4 (2x2) 2 2 3
1000BaseT 31.25 4D-PAM5 125 31.25 None 8 (4x2) 4 4 5*
Cable Category Details:
Cable Category Rated Frequency Bandwidth (MHz) Common Uses
1 None Common Use
2 1 Telephone Wiring
3 16 Telephone Wiring, 10Base-T
4 20 Token-Ring, 10Base-T
5 100 100Base-TX, 10Base-T
5e 100 1000Base-T, 100Base-TX
6 250 1000Base-T, 100Base-TX
6a* 500 10GBase-T
7 600