Allied Telesis AT-8550SP - Manual (Page 85)

AT-8500 Series Fast Ethernet Switch Installation Guide
85
Table 12 lists the RJ-45 pin signals for the two 10/100/1000-Base-T ports
on the AT-8550GB switch when the ports are operating at 1000 Mbps.
Table 12 MDI and MDI-X Pin Signals (1000Base-T)
MDI Configuration MDI-X Configuration
Pinout Pair Pinout Pair
1 Pair 1 + 1 Pair 2 +
2 Pair 1 - 2 Pair 2 -
3 Pair 2 + 3 Pair 1 +
4 Pair 3 + 4 Pair 4 +
5 Pair 3 - 5 Pair 4 -
6 Pair 2 - 6 Pair 1 -
7 Pair 4 + 7 Pair 3 +
8 Pair 4 - 8 Pair 3 -