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Ethernet EIA/TIA-568A/B
| Pin | Pair | Signal | Wire | Color | |||
|---|---|---|---|---|---|---|---|
| T568A | T568B | 10/100Base-T | 1000Base-T | 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 | ||||
|---|---|---|---|---|---|---|
| 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 | ||||
|---|---|---|---|---|---|---|
| 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 | ||||
|---|---|---|---|---|---|---|
| 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 |
