Installation Guide for the Model FS508 Fast Ethernet Switch
2-4
Physical Description
Rear Panel
As illustrated in
Figure 2-3
, the rear panel has a full-duplex (FDX) toggle switch, an auto-duplex
(AUTO) toggle switch, a standard AC power receptacle, and fans for cooling.
Key:
1 = FDX and AUTO duplex toggle switches
2 = Fans
3 = AC power outlet
Figure 2-3.
Rear panel of the Model FS508 switch
FDX/AUTO Duplex Toggle Switches
Full-duplex mode is supported for all 10/100 Mbps ports and allows the 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 Mbps port on the
switch should be set to auto-duplex operation when connecting to these types of devices.
As illustrated in
Figure 2-3
, one full-duplex (FDX) and auto-duplex (AUTO) toggle switch is
assigned to each 10/100 Mbps port on the Model FS508 switch. The communication mode can be
set to either full-duplex or auto-duplex mode.
798EA
1
2
3
AUTO -
FDX -
Enable port to determine duplex mode automatically
Force port to operate at Full Duplex and Half Duplex mode only
1
FDX
AUTO
8
10/100 Mbps
FS508.BK Page 4 Wednesday, May 7, 1997 10:29 AM
