10base-t, management, and rs-232 ports, Duplex mode, 10base-t, management, and rs-232 ports duplex mode – Allied Telesis AT-MCF12VF, SM User Manual
Page 17: At-mcf6xx and at-mcf12xx installation guide 9, Management, 10base-t
AT-MCF6xx and AT-MCF12xx Installation Guide
9
10Base-T, Management, and RS-232 Ports
These ports, as shown in Figure 6, are reserved for future development.
Figure 6 10Base-T, Management, and RS-232 Ports
Duplex Mode
The duplex mode refers to the manner in which a node sends and receives
data on the network. Depending on its capabilities, a node can operate in
either half-duplex mode or full-duplex mode. A node that is operating in half-
duplex mode can either send data or receive data, but not both at the same
time. A node that is operating in full-duplex mode can send and receive data
simultaneously. Naturally, the best network performance is achieved when a
node can operate at full-duplex, since the node is able to both send and receive
data at the same time.
The AT-MCF6xx and AT-MCF12xx Series Multichannel Media Converters are
transparent to the duplex mode of the nodes that are connected to their ports.
That is, the units can operate with nodes operating at either half-duplex or
full-duplex mode. However, the two nodes that are connected to the same
channel on the media converter must operate with the same duplex mode.
For example, assume that you connected a node operating at half-duplex to
the twisted pair port of a channel on the media converter and a node operating
at full-duplex to the fiber optic port of the same channel. This would be an
invalid configuration and could adversely affect the performance of the
network. Either the node connected to the twisted pair port would have to be
changed to full-duplex (if it supports that capability), or the node connected to
the fiber optic port would have to be changed to half-duplex.
RESET
7-12 LINK TEST
NORM
TEST
MCF12SC
10Base-TX/FX Media Converter
MANAGEMENT
LNK
REC
STATION
HUB
OR
10Base-T
RS232
P O W E R
BCKP
MAIN
Ready
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Rx
7
8
9
10
11
12
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Rx
T-LNK
F-LNK
Active
1
2
3
4
5
6
RESET
1-6 LINK TEST
NORM
TEST
MANAGEMENT
LNK
REC
STATION
HUB
OR
10Base-T
RS232
Ready