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Troubleshooting Link Problems
Each full duplex fiber link is monitored at both
ends. The 10BASE-FB Star Coupler and the 3Com
Ethernet 10BASE-FB Modules contain status
indicators (one for each port). The Transceiver
contains a single status indicator. In addition to
signifying link problems, the Transceiver indicator
also indicates a local or remote jabber condition.
5
Blinks
(con’t)
Invalid
data
Broken or
degraded
fiber
Check and fix
RX fiber link
Bad or
degraded
port on other
end
Try another
port or
replace unit
Table 6. Troubleshooting Using the
Status LEDs
LED
Status
Indicates
Possible
Problem
Possible
Solution