Common Problems And Solutions - NEC 1000BASE-T User Manual

4.3. Common problems and solutions

The Connection fails or an error occurs
□ Use a twisted pair cable to connect this adapter. Especially to use for 1000 Mbps, use a twisted pair
cable of CAT 5e or better.
Also, make sure that the cable is securely attached.
□ Make sure that the communication mode (full duplex/half duplex) on the adapter matches that on link
partner.
□ Exchange the network cable.
□ Try another port on the link partner (such as hub/switch).
□ Make sure that there is no noise source (such as a fluorescent light or power line) around the cable.
LINK/SPEED lamp stay off
□ Make sure the OS boot normally.
□ Check all connections at the adapter and link partner.
□ Exchange the network cable (xTP).
□ Try another port on the link partner (such as hub/switch).
□ Make sure the communication rate on the adapter matches that on the link partner.
□ Make sure that the cable between the adapter and link partner is the proper type. If you use this adapter
at 1000 Mbps, use a CAT 5e cable or better.
□ Make sure no foreign object is in LAN port.
□ Confirm that your twisted pair cable is 4 pair type.
If the problem persists even after you checked the above items, something may be wrong with this adapter.
Please contact to reseller, sales agents or service representative.
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