Allied Telesis AT-8550SP - Manual (Page 21)

AT-8500 Series Fast Ethernet Switch Installation Guide
21
Auto-MDI/
MDI-X
The ports are auto-MDI/MDI-X. They automatically configure themselves
as either MDI or MDI-X. This feature allows you to use a straight-through
twisted pair cable to connect any type of device to a port.
Note
The auto-MDI/MDI-X feature on a 10/100/1000Base-T port is
functional only when the port is set to Auto-Negotiation. If you
disable Auto-Negotiation and set the port’s speed and duplex
mode manually, the port defaults to MDI-X. For instructions on
configuring a port, refer to the AT-S62 Management Software
User’s Guide or the AT-S62 Command Line User’s Guide.
Port Pinouts For the pinouts of these ports when operating at 10 or 100 Mbps, refer to
Table 10 on page 83. For port pinouts when the ports are operating at
1000 Mbps, refer to Table 12 on page 85.