Cabletron Systems FOT-F3 - Manual (Page 40)

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TESTING AND TROUBLESHOOTING
Figure 4-2. LANVIEW LEDs
Receive (RCV) LED
This yellow LED flashes to indicate that the transceiver is
receiving a data packet from the network. The flash of the
LED is pulse stretched for viewing effect.
The LED will flash when traffic is on the network, even if
the data is not intended for the device attached to the
FOT-F3.
LNK
CLN
RCV
XMT
SQE
PWR
SQE
TX
RX
1300nm