How do I make a serial loopback connector for Lantronix products that have an RJ45 connector?

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When looking at the RJ45 serial port socket with the notch for the locking

tab facing down the pins are numbered 1-8 left to right:


  

                                  12345678  
                                 [||||||||]
                                 [        ]
                                 [__    __]
                                    |__|





1) Take CAT 5 cable and cut approximately 4" off.



2) Strip the plastic from outside of the cable. This leaves you with 8 bare wires of various colors. It is not important which colors you choose, but choose 4 wires.



3) Place four wires in the shape of a "U" into the RJ45 connector to connect 1 to 8; 2 to 7; 3 to 6; 4 to 5



Your serial loopback connector will look like this when done:


  

                                  |------|  (1 TO 8)
                                  ||----||  (2 TO 7)
                                  |||--|||  (3 TO 6)
                                  ||||||||  (4 TO 5)
                                  12345678  

                                 [||||||||]

                                 [        ]

                                 [__    __]

                                    |__|

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[Originally Published On: 03/17/2003 10:19 AM]