NEC XN120 - Manual (Page 9)

Connecting to the System
UserPro Manual 3
LAN Cable
Straight through RJ45 patch cable.
LAN Cross Cable
RJ45 cable with cross over Tx and Rx.
Pin Pin
1 1
2 2
3 3
6 6
Pin Pin
1 3
2 6
3 1
6 2