Installation Guide for the Model FS562 and Model FS566 Fiber Switches
2-8 Physical Description
FDX/HDX Duplex Toggle Switches
The duplex mode (full or half) is controlled by the dip switches on the rear panel of the Model
FS562/FS566 switch. Both the sending port and the receiving port must be set to the same duplex
mode. As illustrated in Figure 2-5 and Figure 2-6, one full-duplex (FDX) or half-duplex (HDX)
toggle switch is assigned to each 100 Mbps fiber port on the switch.
FDX/AUTO Duplex Toggle Switches
Full-duplex mode is supported for all 10/100 Mbps ports and allows a port to transmit and receive
data at the same time. Full-duplex operation applies only to point-to-point access (for example,
when a switch is connected to a PC, a server, or another switch).
Setting the toggle switch to AUTO on the 10/100 Mbps port enables the port to determine duplex
mode automatically. In this mode, the 10/100 Mbps port operates in either full- or half-duplex
mode, depending on the operating mode of the remote port. If the remote port cannot provide the
proper signal to indicate its own capability, the 10/100 Mbps port on the switch will default to
half-duplex mode. Because repeaters and hubs use a common collision domain for all
communications and cannot communicate in full-duplex mode, the associated 10/100 Mbps port
on the switch should be set to auto-duplex operation when connecting to these types of devices.
As Figure 2-5
and Figure 2-6 show, a full-duplex (FDX) toggle switch or an auto-duplex (AUTO)
toggle switch are assigned to each 10/100 Mbps port on the Model FS562/FS566 switch. The
communication mode can be set to either full-duplex or auto-duplex mode.
Note:
In addition to setting the duplex toggle switches to the correct position, make
sure that all Fast Ethernet topology rules are followed.
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