Installation Guide for the Model FS509 Fast Ethernet Switch
2-6
Physical Description
Rear Panel
As illustrated in Figure 2-4, the rear panel has a full-duplex (FDX) and auto-duplex (AUTO)
toggle switch, cooling fan, and a standard AC power receptacle.
Key:
1 = FDX/AUTO duplex toggle switches (for ports 1 through 8)
2 = FDX/AUTO toggle switch (for port 9)
3 = Cooling fan
4 = AC power outlet
Figure 2-4.
Rear Panel of the Model FS509 Switch
FDX/AUTO Duplex Toggle Switches
Full-duplex mode is supported for all 10/100 Mbps ports (ports 1 through 8) 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 supported by the remote node, the
port will establish a 100 Mbps full-duplex link as the default. 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 communica-
tions 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.
Setting the toggle switch to FDX on the 10/100 Mbps port enables the port to determine the speed
but will set the duplex mode to full-duplex.
100-240 VAC 50-60 Hz 0.50A
8932FA
FDX-
AUTO-
1000 Mbps (port () always operate at full duplex
Force port to operate at full duplex
Enable port to determine duplex mode automatically
FDX
AUTO
AUTO OFF
AUTO ON
10/100 Mbps
Gigabit
1
8 9
1
4
2
3
