Troubleshooting
10
Media Expansion Modules
Fiber Uplink Module
Access MethodCSMA/CD
Standards Conformance
IEEE 802.3u
Communication Rate
100Mbps
Communication Mode
Full duplex
Media Supported
50/125 micron or 62.5/125 micron multimode fiber,
9/125 micron single-mode fiber
Number of Ports
1 100BASE-FX-SC type port or
1 100BASE-FX- ST type port or
1 100BASE-FX-MTRJ type port
Indicator Panel
Included on base unit
Troubleshooting
Diagnosing Switch Indicators
The switch can be easily monitored through panel indicators to assist the network
manager in identifying problems. This section describes common problems you may
encounter and possible solutions.
Symptom:Link indicator does not light up (green) after making a connection.
Cause: Network interface (e.g., a network adapter card on the attached device),
network cable, or switch port is defective.
Solution: Verify that the switch and attached device are powered on. Be sure the
cable is plugged into both the switch and corresponding device. Verify
that the proper cable type is used and its length does not exceed specified
limits. Check the adapter on the attached device and cable connections
for possible defects. Replace the defective adapter or cable if necessary.
Symptom:Power indicator does not light up (green) after power on.
Cause: Defective power outlet, power cord, or internal power supply.
Solution: Check the power outlet by plugging in another device that is functioning
properly. Check the power cord with another device. If these measures
fail to resolve the problem, have the unit’s power supply replaced by a
qualified distributor.
Power and Cooling Problems
If the power indicator does not turn on when the power cord is plugged in, you may
have a problem with the power outlet, power cord, or internal power supply as
explained in the previous section. However, if the unit powers off after running for a
while, check for loose power connections, power losses or surges at the power
outlet, and verify that the fans on the right side of the unit are unobstructed and
running prior to shutdown. If you still cannot isolate the problem, then the internal
power supply may be defective. In this case, contact your distributor for assistance.
