Ethernet EIA/TIA-568A/B

Pin	Pair		Signal		Wire	Color
Pin	T568A	T568B	10/100Base-T	1000Base-T	Wire	T568A	T568B
1	3	2	TX+	BI_DA+	+/tip	white/green	white/orange
2	3	2	TX-	BI_DA-	-/ring	green	orange
3	2	3	RX+	BI_DB+	+/tip	white/orange	white/green
4	1	1		BI_DC+	-/ring	blue	blue
5	1	1		BI_DC-	+/tip	white/blue	white/blue
6	2	3	RX-	BI_DB-	-/ring	orange	green
7	4	4		BI_DD+	+/tip	white/brown	white/brown
8	4	4		BI_DD-	-/ring	brown	brown

Direct Connection EIA/TIA-568A

Direct Connection EIA/TIA-568B

Cross-over cable pinouts

Cross-over cable EIA/TIA-568A/B (10Base-T, 100Base-TX)

10BASE-T or 100BASE-TX crossover

Pin	Connection 1: T568A			Connection 2: T568B
Pin	signal	pair	color	signal	pair	color
1	BI_DA+	3	white/green	BI_DB+	2	white/orange
2	BI_DA-	3	green	BI_DB-	2	orange
3	BI_DB+	2	white/orange	BI_DA+	3	white/green
4		1	blue		1	blue
5		1	white/blue		1	white/blue
6	BI_DB-	2	orange	BI_DA-	3	green
7		4	white/brown		4	white/brown
8		4	brown		4	brown

Gigabit T568A crossover
10BASE-T, 100BASE-TX, 100BASE-T4 or 1000BASE-T crossover

Pin	Connection 1: T568A			Connection 2: T568A Crossed
Pin	signal	pair	color	signal	pair	color
1	BI_DA+	3	white/green	BI_DB+	2	white/orange
2	BI_DA-	3	green	BI_DB-	2	orange
3	BI_DB+	2	white/orange	BI_DA+	3	white/green
4	BI_DC+	1	blue	BI_DD+	4	white/brown
5	BI_DC-	1	white/blue	BI_DD-	4	brown
6	BI_DB-	2	orange	BI_DA-	3	green
7	BI_DD+	4	white/brown	BI_DC+	1	blue
8	BI_DD-	4	brown	BI_DC-	1	white/blue

Gigabit T568B crossover
10BASE-T, 100BASE-TX, 100BASE-T4 or 1000BASE-T crossover

Pin	Connection 1: T568B			Connection 2: T568B Crossed
Pin	signal	pair	color	signal	pair	color
1	BI_DA+	2	white/orange	BI_DB+	3	white/green
2	BI_DA-	2	orange	BI_DB-	3	green
3	BI_DB+	3	white/green	BI_DA+	2	white/orange
4	BI_DC+	1	blue	BI_DD+	4	white/brown
5	BI_DC-	1	white/blue	BI_DD-	4	brown
6	BI_DB-	3	green	BI_DA-	2	orange
7	BI_DD+	4	white/brown	BI_DC+	1	blue
8	BI_DD-	4	brown	BI_DC-	1	white/blue