5 Port 10Base-T Hub User Manual - APC - ExcessUPS

Troubleshooting
Troubleshooting
suggestions
12
Table 2 provides suggestions for troubleshooting your hub.
LED Action Cause Solution
Col Blinking
Col
Link/
Traffic
Blinking
excessively
Off
(even with
a cable
attached)
Normal data
collisions on the
network.
Data collisions
are occurring
because of a
high volume of
traffic on the
network.
Cables used to
connect to the
network are
defective or of
the wrong type.
Successful link
is not being
detected by the
port.
Table 2: Suggestions for Troubleshooting
No action is necessary.
Make sure connected
devices are not
operating in fullduplex
mode; they
must operate in halfduplex
mode.
Segment the network
with an Ethernet
switch.
Verify that the cable is
of the correct type. See
“Communication
cables” on page4 for
more information.
Verify that the hub and
the connected device
are powered.
Verify that the cable is
of the correct type. See
“Communication
cables” on page4 for
more information.
Inspect cables for
damage, cable pairs to
see if they are wired
correctly, and
connectors to see if
they are loose.
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