We tested them using a TBase cable tester, and they passed just fine. Looking at your diagram for correct wiring, it looks like you have some colored wires in different locations, but it is still pin for pin. Is there a reason why ours would be causing our problems?


A. Regarding your question on RJ45 pinouts, I would say that you are probably experiencing crosstalk problems.

The reason is this, Ethernet uses pins 1 & 2 and 3 & 6 on 10/100BaseT networks (I know it's a funny way to do it but thats how it is!). One pair is used for transmit and the other pair for receive, so pins 1 & 2 at one end will connect to pins 3 & 6 on the other end and vice versa. In the correct wiring configuration each signal path (transmit or receive) is on its own twisted pair of wires, the twists help to eliminate crosstalk. With your wiring, pins 3 & 6 are split between the green and blue pairs making them susceptible to crosstalk (or noise), this also gets worse when using higher speeds (100BaseT or Gigabit Ethernet).