Installation Guide for the Model SW502 and Model SW507 Ethernet Switches
2-4
Physical Description
Full-duplex mode is supported for all ports. Full-duplex operation only applies to point-to-point
access (such as when a switch is connected to a workstation, a server, or another switch). Repeaters
and hubs use a common collision domain for all communications. When connecting to a repeater or
hub, the associated port should be set to half-duplex operation. When network connection is through
the BNC or AUI interfaces, the Model SW502 switch will operate in half-duplex mode only.
Indicator Panel
The indicator panels on the Model SW502 and Model SW507 switches can be used to monitor and
diagnose the switches. The panel includes a Power LED and port status LEDs.
Power LED
The Power LED indicates if the switch is receiving power (refer to Table 2-1).
Table 2-1. Power LED
Label
Color
Activity
Description
Power
Green
Steady Light
Switch is receiving power and system is running.
No Light
Power is disconnected.
Port Status LEDs
The port status LEDs display the status of the port connections and indicate the result of the
diagnostics tests (refer to Table 2-2). These LEDs indicate when packets are being transmitted or
received, when a valid link has been established, or when a collision is occurring. When the LEDs
blink, they correspond to the amount of packets that are transmitted or received and the amount of
collision at the port.
Collisions occur when two or more devices connected to the switch attempt to transmit data at the
same time on the network. When a collision occurs, devices pause and then transmit again after
waiting a specified time. Because these times differ among devices, successive collisions become
increasingly unlikely.
