3com 3c16475 User Guide

Refer to the information about LEDs given earlier in this guide to 
see if the problem can be identified and rectified. Here are some 
common problems that can occur:

There is a problem with this connection. Check that:

„

The device being connected to is powered on and operating 
correctly.

„

The cable is connected at both ends.

„

The cable is not damaged.

„

If the connection is to a workstation, that the workstation’s 
network interface is installed and configured correctly.

All ports appear to show continual activity. 

There may be broadcast storms on the network. 

Remove port connections one at a time, waiting a few seconds 
between each port. If the LEDs go off after removing a port 
connection, the device that was connected to that port is 
introducing an excessive amount of broadcast frames to the 
network (some pieces of network equipment operate by sending 
out broadcast frames regularly). Refer to the documentation that 
accompanies the device for information on disabling the 
broadcast operation.

If the problem persists and the unit still does not operate 
successfully, contact your supplier with the following information 
before returning the unit:

„

Product number and serial number (printed on a label 
supplied with the unit)

„

A brief description of the fault