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CHAPTER 4: TESTING AND TROUBLESHOOTING
4-6 FOT-F3 USER’S MANUAL
Receive (RCV) LED
This yellow LED flashes to indicate that the transceiver is
receiving a frame from the network. The flash of the LED is pulse
stretched for easy viewing.
The LED flashes when traffic is on the network, even if the data
is not intended for the device attached to the FOT-F3.
Transmit (XMT) LED
This green LED flashes to indicate that a frame is being
transmitted onto the network by the device connected to the
transceiver. The flash of the LED is pulse stretched for easy
viewing.
This LED stays off if the device is active, but not transmitting
traffic onto the network.
Signal Quality Error (SQE) Test Function LED
When on, this yellow LED indicates the SQE test function is
enabled in the transceiver. When the LED is off, this indicates
that the SQE test is not enabled.
The SQE test is used to ensure that the collision presence circuit
and path are operational between the FOT-F3 and the Ethernet
device attached to the AUI port. This test is generated by the
transceiver after a data frame is transmitted through the
transceiver.