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3.4 100BASE-FX Module
The 100BASE-FX port module supports a connection to a Fast Ethernet
network segment through a fiber optic connection. The module comes
with two ST connectors. One labeled Tx is used for transmission. The
other one labeled Rx is used for reception.
When connecting to a 100BASE-FX device using fiber cable, make sure
the Tx connector of the module is connected to the Rx connector of the
device and Rx connector is connected to the Tx connector of the device.
The required fiber optic cable for the connection is 1300nm 62.5/125
mm fiber cable. The maximum distance between the module and the
connected device depends on the device connected and the duplex mode
used for the connection as follows:
Device connected
Computer 100BASE-FX port
Computer 100BASE-FX port
100BASE-FX hub port
100BASE-FX switched port
100BASE-FX switched port
Note:
The 100BASE-FX module does not support auto-negotiation function.
When the port is set at auto-negotiation mode, it will operate in half-
duplex mode automatically.
Figure 3-3 100BASE-FX Port Module
Duplex mode
Half-duplex
Full-duplex
Half-duplex
Half-duplex
Full-duplex
15
Maximum length
400 meters
2K meters
185 meters
400 meters
2K meters
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