Twisted-Pair Port - Allied Telesis AT-8400 Series Reference Manual

Fast Ethernet and Gigabit Ethernet Line Cards
Twisted-pair
Port
24
Type of Connector
The twisted-pair port features an 8-pin RJ-45 connector. (The port uses
four pins when operating at 10 or 100 Mbps and all eight pins when
operating at 1000 Mbps.)
Speed
The twisted-pair port can operate at 10, 100, or 1000 Mbps. You can set
the port speed manually or, since the ports are IEEE 802.3u Auto-
Negotiation compliant, you can let the switch set each port's speed
automatically. With Auto-Negotiation, the switch automatically matches
the highest possible common speed between each switch port and each
end node. For example, if an end node is capable of only 10 Mbps, the
switch sets the port connected to the end node to 10 Mbps.
Note
Auto-Negotiation is activated as the default on all twisted-pair
ports on the switch. To deactivate Auto-Negotiation and set the
speeds manually, refer to the AT-S60 Management Software
User's Guide or the AT-S60 Command Line User's Guide.
Duplex Mode
The twisted-pair port can operate in either half- or full-duplex mode. The
port is IEEE 802.3u-compliant and will Auto-Negotiate the duplex mode
setting. If desired, Auto-Negotiation on the port can be disabled so that
you can set the duplex mode manually through the management
software.
Maximum Distance
The twisted-pair port has a maximum operating distance of 100 meters
(328 feet).
Type of Cabling
For 10 Mbps, the port requires Category 3 or better 100 ohm shielded or
unshielded twisted-pair cabling. For 100 or 1000 Mbps operation, the
port requires Category 5 or Enhanced Category 5 (5E) 100 ohm shielded
or unshielded twisted-pair cabling.
Auto-MDI
For speeds of 10 Mbps and 100 Mbps, the twisted-pair port is auto-MDI
when the port is set to Auto-Negotiation. It automatically configures
itself as either MDI or MDI-X when connected to an end node. This
feature allows you to use either a straight-through or crossover twisted-
pair cable when connecting any network device to the port.