Wiring

Connectors

RJ45 Jack and Plug Pinout.

Ethernet

The TIA/EIA-568-A specifies two wiring standards for a 8-position modular connector such as RJ45. The two wiring standards, T568A and T568B vary only in the arrangement of the colored pairs. We are using T568B.

Straight-Through Cable Pinout for T568B:

RJ45 Pin #       Wire Color      10Base-T Signal       1000Base-T Signal
                   (T568B)      100Base-TX Signal
   1             White/Orange     Transmit+                   BI_DA+
   2             Orange           Transmit-                    BI_DA-
   3             White/Green      Receive+                     BI_DB+
   4             Blue             Unused                       BI_DC+
   5             White/Blue       Unused                       BI_DC-
   6             Green            Receive-                     BI_DB-
   7             White/Brown     Unused                       BI_DD+
   8             Brown            Unused                       BI_DD-