Auto Mdi/Mdi-X - Allied Telesis AT FS708LE AT-FS708LE AT-FS708LE Installation Manual

Note
Since the AT-FS708LE ports operate in
Auto-Negotiate mode only, the end-nodes
connected to the AT-FS708LE must also
be configured to operate in the Auto-
Negotiate mode. If an end-node is
configured to a specific duplex in a
manual mode, it will not respond to the
Auto-Negotiate protocol from the
AT-FS708LE. (The speed is determined
from the link pulses, however, so the
speed is always detected correctly.) As a
result, the AT-FS708LE port setting will
end up at half-duplex. If the end port is
manually configured to full-duplex, there
will be a duplex mismatch and data will
be lost. If the end port is manual
configured to half-duplex, both ports will
have the speed and duplex match up
correctly.

Auto MDI/MDI-X

An RJ-45 twisted pair port on a 10 Mbps or 100
Mbps Ethernet network device can have one of
two possible wiring configurations: MDI or
MDI-X. A RJ-45 port on a PC, router, or bridge
is typically wired as MDI, while a twisted pair
port on a switch or hubs is usually MDI-X.
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