Allied Telesis AT-MC102XLPCI - Manual (Page 18)

Chapter 1: Product Overview
18
Auto MDI/MDIX
An RJ-45 twisted-pair port on an 100 Mbps Ethernet network device can
have one of two possible wiring configurations: MDI or MDI-X. The RJ-45
port on a PC, router, or bridge is typically wired as MDI, while the twisted-
pair port on a switch or hub is usually MDI-X.
The AT-MC102XLPCI Media Converter features automatic MDI/MDI-X.
The 100Base-TX port automatically determines the configuration of the
port on the device to which it is connected and then configures itself
appropriately. For example, if a port on a media converter is connected to
a PC, which is typically wired as MDI, the port on the media converter
automatically configures itself as MDI-X. This feature allows you to use a
straight-through cable when connecting to any type of device.