Troubleshooting The Nic; Interpreting The Leds - 3Com EtherLink 3C980C-TXM User Manual

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Interpreting the LEDs

Three diagnostic light-emitting diodes (LEDs) are located
below the cable connector. The LEDs operate as follows:
LED State
10 LNK On
(link)
Off
Blinking The cable polarity is reversed. Try a different network cable or
100 On
LNK
(link)
Off
Blinking The cable polarity is reversed. Try a different network cable or
ACT Blinking Network traffic is present.
(activity)
Steady
Off
If a LNK LED indicates a problem, check the following:
T
ROUBLESHOOTING THE
Meaning
If drivers are installed, the 10BASE-T connection is active.
If drivers are not installed, the NIC is receiving power.
Something is preventing the connection between the NIC and
the hub or switch.
contact the system administrator.
If drivers are installed, the 100BASE-TX connection is active.
If drivers are not installed, the NIC is receiving power.
Something is preventing the connection between the NIC and
the hub or switch.
contact the system administrator.
Heavy network traffic is present.
No network traffic is present.
Ensure that the network hub or switch and the cable
connecting to the NIC comply with the specifications
appropriate for the network connection.
Ensure that the hub or switch is powered on.
NIC