Allied Telesis AT-FS238A/1 User Manual
AT-FS238a/x and AT-FS238b/x Series Installation Guide
7
Twisted Pair Port
The AT-FS238a/x and AT-FS238b/x Series Bridging Converters have one
10Base-T/100Base-TX twisted pair port. The twisted pair port features a
RJ-45 connector.
10Base-T/100Base-TX twisted pair port. The twisted pair port features a
RJ-45 connector.
Port Speed
The twisted pair port is compliant with the 10Base-T and 100Base-TX
standards and is capable of either 10 Mbps or 100 Mbps operation. You can set
the port speed manually or, since the port is IEEE 802.3u auto-negotiation
compliant, you can allow the bridging converter to set the port speed
automatically. With auto-negotiation, the speed of the port is set
automatically by the bridging converter after it determines the speed of the
end-node connected to the port. Auto-negotiation is designed to ensure that
the port on the bridging converter and the end-node are operating at the same
speed and that they are communicating at the highest possible common speed
of the devices.
standards and is capable of either 10 Mbps or 100 Mbps operation. You can set
the port speed manually or, since the port is IEEE 802.3u auto-negotiation
compliant, you can allow the bridging converter to set the port speed
automatically. With auto-negotiation, the speed of the port is set
automatically by the bridging converter after it determines the speed of the
end-node connected to the port. Auto-negotiation is designed to ensure that
the port on the bridging converter and the end-node are operating at the same
speed and that they are communicating at the highest possible common speed
of the devices.
Duplex Mode
Duplex mode refers to how an end-node receives and transmits data. If an
end-node can receive or transmit data, but not both simultaneously, the end-
node is operating in what is referred to as half-duplex mode. If an end-node
can both receive and transmit data simultaneously, the end-node is said to be
operating in full-duplex mode. Naturally, an end-node capable of operating in
full-duplex can handle data much faster than an end-node that can only
operate in half-duplex mode.
end-node can receive or transmit data, but not both simultaneously, the end-
node is operating in what is referred to as half-duplex mode. If an end-node
can both receive and transmit data simultaneously, the end-node is said to be
operating in full-duplex mode. Naturally, an end-node capable of operating in
full-duplex can handle data much faster than an end-node that can only
operate in half-duplex mode.
The twisted pair ports on the AT-FS238a/x and AT-FS238b/x Series Bridging
Converter can operate in either half-or full-duplex mode. They are IEEE
802.3u-compliant and use Auto-Negotiation to set the duplex mode setting for
you automatically.
Converter can operate in either half-or full-duplex mode. They are IEEE
802.3u-compliant and use Auto-Negotiation to set the duplex mode setting for
you automatically.
For Auto-Negotiation to operate properly on a bridging converter, the end-
nodes connected to the converter should also use Auto-Negotiation. If an end-
node does not have this feature and has a fixed duplex mode of full-duplex, the
result will be a duplex mode mismatch between the end-node and a converter
port. A port on the bridging converter connected to an end-node with a fixed
duplex mode of full-duplex will operate at only half-duplex. This results in the
end node using full-duplex and the switch port using half-duplex. This can
produce network performance problems. Should you encounter this situation,
you must configure the port on the end-node to use Auto-Negotiation or, if it
lacks that feature, to half-duplex.
nodes connected to the converter should also use Auto-Negotiation. If an end-
node does not have this feature and has a fixed duplex mode of full-duplex, the
result will be a duplex mode mismatch between the end-node and a converter
port. A port on the bridging converter connected to an end-node with a fixed
duplex mode of full-duplex will operate at only half-duplex. This results in the
end node using full-duplex and the switch port using half-duplex. This can
produce network performance problems. Should you encounter this situation,
you must configure the port on the end-node to use Auto-Negotiation or, if it
lacks that feature, to half-duplex.