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 -