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Fast EtherHub-12se User’s Guide
A-2 Troubleshooting
System Diagnostics
Installation
Verify that all system components have been properly installed. If one or more
components appear to be malfunctioning, test them in an alternate environment
where you are sure that all the other components are functioning properly.
Cabling
1. Verify that the cabling type is correct. Be sure all cable connectors are
securely seated in the required ports. Straight-through cable should be used
for all standard twisted-pair connections; and multimode cable with SC or
ST type connectors should be used for fiber optic connections.
2. Make sure all devices are connected to the network. Equipment may have
been unintentionally disconnected from the network.
External Adapters
Make sure the network adapter cards installed in the workstations are
compatible with your network media type and are in good working condition.
Configuration
If problems occur after altering the network configuration, restore the original
connections, then try to track the problem down by implementing the new
changes, one step at a time. Ensure that cable distances and other physical
aspects of the installation do not exceed recommendations.
Hub Integrity
As a last resort verify the hub’s integrity with a power-on reset. Turn the
power to the hub off and then on a few times. If the problem still persists and
you have completed all the preceding diagnoses, contact your Accton
distributor for further assistance. (Refer to Appendix E.)