Campbell Scientific NL100 Network Link Interface - Manual (Page 35)

Appendix C. 10 Base-T Cabling
The cable that runs from the computer to the NL100/105 should be a Category
5 twisted pair cable. If the NL100/105 will be connected directly to the
computer, a crossover cable should be used. If the NL100/105 will be
connected to the computer through a hub, a straight through cable should be
used. The pin-outs for each of these cables is shown below.
Straight Through Cable
Twisted Pair 1
1 ⇔ 1
2 ⇔ 2
Twisted Pair 2
3 ⇔ 3
6 ⇔ 6
Crossover Cable
Twisted Pair 1
1 ⇔ 3
2 ⇔ 6
Twisted Pair 2
3 ⇔ 1
6 ⇔ 2
C-1