Allied Telesis AT-MC1005/4 - Manual (Page 16)

Overview
6
Half- and Full-Duplex Mode
Duplex mode refers to the way an end-node sends and receives data on the
network. An end-node can operate in either half- or full-duplex mode,
depending on its capabilities. An end-node that is operating in half-duplex
mode can either send data or receive data, but it cannot do both at the same
time. An end-node that is operating in full-duplex mode can send and receive
data simultaneously. The best network performance is achieved when an end-
node can operate at full-duplex, since the end-node is able to send and receive
data simultaneously.
The AT-MC1004 and AT-MC1005/x Series Gigabit Ethernet Media Converters
operate in full-duplex mode only. The media converter can operate with end-
nodes capable of either full-duplex mode or that can auto-negotiate the duplex
mode. However, it is important to remember that the two end-nodes connected
to the ports on the media converter must be able to operate in full-duplex
mode.
External AC/DC Power Adapter
An external AC/DC power adapter is included with the media converter for
desktop operation (see Figure 3). The power adapter supplies 12V DC to the
media converter. Allied Telesyn supplies an approved safety compliant AC
power adapter for the 120 and 240V AC versions with an unregulated output
of 12V DC at 1 A. The power required for the media converter is 12V DC,
1000 mA.
Note
The power adapter is not used if you install the media converter in an
AT-MCR12 chassis.
Figure 3 External AC/DC Power Adapter (North American version)