Problem Solving - 3Com OfficeConnect 3CDSG8 Installation Manual

4 PROBLEM SOLVING

The Switch has been designed to aid you when detecting and solving possible prob-
lems with your network. These problems are rarely serious; the cause is usually a dis-
connected or damaged cable, or incorrect configuration. If this section does not solve
your problem, contact your supplier for information on what to do next.
Perform these actions first:
• Ensure all network equipment is powered on.
• Power each piece of network equipment off, wait about five seconds and then
power each one on.
CAUTION: Do not power the Switch off and then immediately on. Wait about
five seconds between power cycles.
Check the following symptoms and solutions:
Power LED not lit.
This is probably because the switch does not have power. Check the following:
• Make sure the power lead from the power adapter is properly connected and the
cord is not damaged.
• Ensure the power adapter is correctly fitted into the power outlet socket and that
the socket switch is turned on if applicable.
• Ensure you are using only the 3Com power adapter supplied with the switch.
If there is still no power, contact 3Com Technical Support and ask for assistance.
Only use the power adapter supplied with the Switch or a replacement
OfficeConnect power adapter. Do not use any other power adapter.
For reference, the part number for the power adapter supplied for your region is:
3C number
3C12VUS
3C12VUK
3C12VME
3C12VAA
3C12VSA
3C12VKR
3C12VRA
Power LED lit but Status LED illuminated yellow.
This indicates that the switch is receiving power, but for some reason the switch is not
operational. This is most likely due to a problem with the operational software in the
unit not loading correctly.
Refer to the diagnostic messages displayed on the command line interface (CLI) to
help identify the problem. If the software is corrupted, you can re-load the software
from the CLI. Please follow the instructions found in the User Guide for this Switch
which can be found on the on the CD which is supplied with your Switch or which
can be downloaded from www.3Com.com.
If a software reload does not resolve the issue, contact 3Com Technical Support and
ask for assistance
Port Status LED not lit for a port that has a TP cable connected.
After connection, it may take several seconds for the Port Status LEDs to illuminate.
The Port Status LED should turn Green or Yellow, for each port that is connected.
If the Port Status LED is not lit after several seconds, ensure that the connected device
is powered on, that the TP cable is not damaged and that it is correctly inserted at
both ends.
You may find that a TP cable works when connected to the Switch, but does not work
if disconnected from the Switch and connected to another device. This may be
because the other device does not have the automatic MDI/MDIX feature.
Region
US and Canada
UK
Europe and Middle East
Australasia
South Africa
Korea
Argentina
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