the connection cable must be Lan to com pin assignment

2 (DB9) ---> 3 (RJ45)3 (DB9) ---> 2 (RJ45)5 (DB9) ---> 1 (RJ45)

Here are the most important cables you have to connect to have the cable work.

1 (RJ45) ---> 5 (DB9)2 (RJ45) ---> 3 (DB9)3 (RJ45) ---> 2 (DB9)

But you can also connect all the cables and the cable will work, here are the connections:

1 (RJ45) ---> 5 (DB9)2 (RJ45) ---> 3 (DB9)3 (RJ45) ---> 2 (DB9)4 (RJ45) ---> 8 (DB9)5 (RJ45) ---> 7 (DB9)6+8 (RJ45) ---> 4 (DB9)7 (RJ45) ---> 6+1 (DB9)

Side Note: Make sure you are holding the RJ45 in the right orientation to know the 1st cable. Secondly make sure your connections are firm; test for continuity using a multimeter.