Allied Telesis AT-8400 Series Reference Manual page 39

Note
Auto-MDI is activated as the default on all twisted-pair 10/100 ports
on the switch. To activate Auto-MDI, and set the port manually,
refer to the AT-S60 Management Software User's Guide or the
AT-S60 Command Line User's Guide.
Port Pinouts
For the pinouts of the twisted-pair port when operating at 10 or 100
Mbps in the MDI configuration, refer to Table 6 on page 19. For the
pinouts of the twisted-pair port when operating at 10 or 100 Mbps in the
MDI-X configuration, refer to Table 7 on page 19.
When the port is operating at 1,000 Mbps, all four pairs are used. The
table below lists the port pinouts.
Table 10 Pin Configurations (1,000 Mbps)
MDI Configuration
Pin
1
2
3
4
5
6
7
8
AT-8400 Chassis Installation Guide
Pair
TP0+
TP0-
TP1+
TP2+
TP2-
TP1-
TP3+
TP3-
25