[FST-80x] 10/100Base-TX port link LED is lit, but the traffic is irregular.

1. Check that the attached device is not set to dedicate 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.

2. Check the FST-80x DIP Switch setting and assure the same speed duplex mode setting on FST-80x and attached device.