Cabletron Systems F3 user manual Receive RCV LED, Transmit XMT LED

CHAPTER 4: TESTING AND TROUBLESHOOTING

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.

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