Crossover cable:

1 <-> 3 short version: TX+ (1) <-> (3) RX+
2 <-> 6 TX- (2) <-> (6) RX-
3 <-> 1 RX+ (3) <-> (1) TX+
4 <-> 4 RX- (6) <-> (2) TX-
5 <-> 5
6 <-> 2
7 <-> 7
8 <-> 8

Regular end:
|1|2|3|4|5|6|7|8|
^ ^ ^ ^

And at the crossover end:
|3|6|1|4|5|2|7|8|
^ ^ ^ ^

computer2know :: thank you for your visit :: have a nice day :: © 2018