Appendix A
Fiber Optic Modules
6
EtherFast® 16-Port and 24-Port 10/100 Ethernet Switches
WARNING:
The fiber module does not
autosense, so you must set it to run at either
full or half duplex. Prior to installing the fiber
module into the expansion port, use the
jumpers on the card as shown in Figure A-1.
Jumper Diagram
WARNING:
Changing connectors must be
done professionally with the proper tools. If
this is your first time working with fiber, consult
a networking professional who is familiar with
fiber.
Reading a Fiber Module’s LED Display
A Fiber Module’s LED Display has two LEDs: the Link/Activity
(Link/Act) LED and the Full Duplex/Half Duplex (FDX) LED.
See the chart below to find out what the status of each
LED denotes.
Front Panel LED Displays
LEDs
Network Status
LEDs
Color
Status
Link/Act
Green
Solid light
Connection
Established
Blinking light Transmitting/
Receiving
FDX
Yellow
Solid light
Full duplex
transfer mode
No light
Half duplex
transfer mode
