15.9.14

RJ45 Connections...


Pin Number Designations

There are pin number designations for each color in T-568B and T-568A.

                 T-568B                         T-568A
       --------------------------      ------------------------
Pin    Color             Pin Name      Color           Pin Name
---    -------------     --------      -------------   --------
 1     Orange Stripe     Tx+           Green Stripe    Rx+
 2     Orange            Tx-           Green           Rx-
 3     Green Stripe      Rx+           Orange Stripe   Tx+
 4     Blue              Not Used      Blue            Not Used
 5     Blue Stripe       Not Used      Blue Stripe     Not Used
 6     Green             Rx-           Orange          Tx-
 7     Brown Stripe      Not Used      Brown Stripe    Not Used
 8     Brown             Not Used      Brown           Not Used 
 
 
 

RJ45 Color-Coded Scheme

RJ45 cables have 8 color-coded wires, and the plugs have 8 pins and conductors. Eight wires are used as 4 pairs, each representing positive and negative polarity. The most commonly used wiring standard for 100baseT is T-586B stanrard described above. Prior to EIA 568A and 568B standards, the color-coded scheme was used to wire RJ45 cables. The table below depicts pin and color schemes used in traditional and standardized setup. 


Pin Colored Scheme T-568B (Common) T-568A

1 Blue Orange Stripe Green Stripe

2 Orange Orange Green

3 Black Green Stripe Orange Stripe

4 Red Blue Blue

5 Green Blue Stripe Blue Stripe

6 Yellow Green Orange

7 Brown Brown Stripe Brown Stripe

8 White (or Grey) Brown Brown
 

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