ZyXEL Communications ES-105/ES-108 - Manual (Page 11)

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Table 4 Troubleshooting LK/ACT LED
STEPS CORRECTIVE ACTION
3 Verify that proper network cable type is used and its length does
not exceed 100 meters. For more information on network cable
types, see the Rear Panel Ethernet Cable Connections section.
FD/COL LED
The FD/COL LED blinks. Some collisions in the network are normal.
If the FD/COL LED blinks continuously, proceed to the steps below.
Table 5 Troubleshooting FD/COL LED
STEP CORRECTIVE ACTION
1 Verify that proper network cable type is used and its length does
not exceed 100 meters (328 feet). For more information on
network cable types, see the Rear Panel Ethernet Cable
Connections section.
2 Your network is busy. Try sending large files later, reduce the
number of users or segment your network.