6.TROUBLESHOOTING

SYMPTOM Link LED does not lit after cable is connected to the port.

CHECKPOINT 4 Verify that the other end of the cable is connected to a device that is powered on and on-line.

4For UTP cable connection to another hub, verify that only one end of the cable is connected to a “MDI-II” Uplink port.

SYMPTOM 100Base-TX port Link LED is lit, Collision LED is blinking, but traffic is irregular.

CHECKPOINT 4 Check that the attached device is not set to dedicated full-duplex. (Some devices use a physical or software switch to change duplex modes. Auto-negotiation may not recognize this type of full-duplex setting.

SYMPTOM After setting the DIP-switch of the 100Base-FX module, the attached device doesn’t communicate normally with the port.

CHECKPOINT 4 The attached network device MUST be set to operate in the same duplex mode.

ALWAYS CHECK THAT THE CABLE, LINK DISTANCES, AND OVERALL NETWORK DIAMETER ARE WITHIN SPEC. FOR THE NETWORK TYPE.

FNSW-16/2400S User’s Guide

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