Problem Solving - 3Com OfficeConnect Hub 8 User Manual

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ROBLEM OLVING
The OfficeConnect hub has been designed to aid you when
detecting and solving possible problems with your network.
These problems are rarely serious; the cause is usually a
disconnected 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 equipment is powered on.
Power each unit off, wait about 5 seconds and then
power them on.
Check the following symptoms and solutions:
Power LED not lit. Check your power adapter connection.
If there is still no power, you may have a faulty power
adapter which needs replacing with another OfficeConnect
power adapter. Do not use any other power adapter
with the hub.
Alert LED continuously lit. There is either continual
excessive use of your network (over 80%) or, more likely, a
100BASE-TX port has partitioned due to a loop in your
network (in which case the corresponding Port Status LED
will be yellow). Examine your connections and remove the
loop. Each piece of equipment needs only one connection
to your OfficeConnect hub.
Port Status LED yellow. It is likely that there is a loop in
your network which has caused this port to partition.
Examine your connections and remove the loop. Each piece
of equipment needs only one connection to your
OfficeConnect hub.
Link between two OfficeConnect hubs not working.
Check your hub connections; follow the information given
in the "Connecting OfficeConnect Hubs Together" section.
It is likely that an Uplink/Normal switch is incorrectly set.
Workstation connection not working. Check that you
are using a 100Mbps adapter in your workstation. If your
adapter can operate at various speeds, ensure that it is set
to operate at 100Mbps.
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