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AT-FS713FC/xx and AT-FS717FC/xx Series Installation Guide
Twisted Pair Ports
The AT-FS713FC/xx and AT-FS717FC/xx Series Switches have twelve and
sixteen 10/100Base-TX twisted pair ports, respectively.
Port Speed
The twisted pair ports are compliant with the 10Base-T and 10Base-TX
standards and are capable of either 10 Mbps or 100 Mbps operation. The ports
are IEEE 802.3u auto-negotiation compliant. The speed of the port is set
automatically by the switch after determining the speed of the end-node
connected to the port. Auto-negotiation is designed to ensure that each port on
the switch and the end-node connected to each port are operating at the same
speed and that they are communicating at the highest possible common speed
of the devices.
Duplex Mode
The twisted pair ports on the switches can operated in either half- or full-
duplex mode and are set automatically through auto-negotiation. If the end-
node is capable of full-duplex mode, the twisted pair port is set to full-duplex.
If the end-node is capable of half-duplex mode, the port is set to half-duplex.
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. 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.
To connect two 10 Mbps or 100 Mbps network devices together that have
dissimilar port wiring configurations, such as MDI to MDI-X, you would
usually use a straight-through twisted pair cable. To connect two network
devices that have the same wiring configuration, such as MDI to MDI, you
would usually use a crossover cable.
The AT-FS713FC/xx and AT-FS717FC/xx Series Switches feature automatic
MDI/MDI-X. Each 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 switch is connected to a port on a bridge, which is
typically wired as MDI, the port on the switch automatically configures itself
as MDI-X. This feature allows you to use either crossover cables or straight-
through cables when connecting devices to these switches.
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