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Page 28
All link problems cause the link to be inoperable. 
If a link problem is indicated, check the indicators 
at both sides of the link, and then consult
Table 6.
Troubleshooting System 
Problems
This section addresses some of the system
problems that can be corrected using the options 
on the 10BASE-FB Transceiver. If problems occur, 
always check the diagnostics indicators on the 
Transceiver.
Excessive Collisions
Collisions can be caused by loops in the
10BASE-FB network. Such loops cause every 
packet to collide with itself. If you cannot locate 
the loop, try segmenting your network (by dis-
connecting Star Couplers, or ONline and ONcore 
Hubs one at a time) until the loop is located.