3Com 3C16753 - OfficeConnect Dual Speed Hub 8 User Manual - Roblem
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ROBLEM
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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 network equipment is powered on.
■
Power each piece of network equipment off, wait about
5 seconds and then power each one 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 an identical
OfficeConnect power adapter. Do not use any other
power adapter with the Hub.
10Mbps Port Status LED lit for a port with a 100Mbps
device connected. This may be because the cable is not of
a high enough quality to carry Fast Ethernet signals (we
recommend you use a Category 5 cable), or due to a
problem with the network card (NIC) of the attached
equipment.
Link between the Hub and another OfficeConnect hub
not working. Check your connections; follow the
information given in the “Connecting Another
OfficeConnect Hub” section on page 13. It is likely that an
Uplink/Normal switch is incorrectly set.
Port Status LED not lit for a port that has a
connection. Check the following:
■
You are using a ‘straight-through’ cable which is properly
connected at both ends, and is not damaged. Refer to
“Twisted Pair (TP) Cables” on page 10.
■
The equipment connected to the Hub is powered on,
operating correctly and contains the correct type of
connection. Refer to Figure 6 to compare the wiring of a
straight-through and a crossover cable.
■
Your PCs network drivers have loaded and initialised
correctly.