T568A is the older RJ45 Ethernet wiring standard specified by ANSI/TIA-568 differing from T568B only in pairs 1 and 3 being swapped. Used in US government buildings.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | TX+ | Transmit positive white-green | BUS |
| 2 | TX- | Transmit negative green | BUS |
| 3 | RX+ | Receive positive white-orange | BUS |
| 4 | Bi_DC+ | Bidirectional D+ blue | BUS |
| 5 | Bi_DC- | Bidirectional D- white-blue | BUS |
| 6 | RX- | Receive negative orange | BUS |
| 7 | Bi_DD+ | Bidirectional D+ white-brown | BUS |
| 8 | Bi_DD- | Bidirectional D- brown | BUS |
T568A is the older RJ45 Ethernet wiring standard specified by ANSI/TIA-568 differing from T568B only in pairs 1 and 3 being swapped. Used in US government buildings.