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MOXA EtherDevice Switch Hardware Installation Guide
4-4
On FX port’s 100 Mbps is active
Blinking
Data is being transmitted at 100 Mbps
100M
(FX)
GREEN
Off 100BaseFX port is inactive
Auto MDI/MDI-X Connection
The Auto MDI/MDI-X function allows users to connect MOXA
EDS-508’s 10/100BaseTX ports to any kind of Ethernet device, without
paying attention to the type of Ethernet cable being used for the
connection. To understand the meaning of this statement, you simply
need to remember that there are two types of Ethernet ports, and two
types of Ethernet cables. See the 10/100BaseTX Ethernet Port Connection
section from Chapter 3 for detailed Pinout and Cable Wiring diagrams. In
this section, we give a short primer of the terminology, and indicate
which cable should be used to connect which types of ports.
There are two types of Ethernet port in use. The first type is called an
MDI (Medium Dependant Interface) port, and is what you find on your
PC’s NIC (Network Interface Card). The second type is called an MDI-X
(Medium Dependant Interface, Crossover) port, and is the type of port
found in a standard HUB or switch. For this reason, we often refer to an
MDI port as being NIC-type, and an MDI-X port as being
HUB/Switch-type.
There are also two types of Ethernet cable in use. The first type is a
straight-through cable, and the second type is a cross-over cable. The
general connection rules are:
?? A straight-through cable is used to connect dislike ports:
MDI ? MDI-X.