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-