Filter
Top Products
Page 4 - 6
TESTING AND TROUBLESHOOTING
4.2 USING LANVIEW
The FOT-F3 Fiber Optic Transceiver uses Cabletron
Systems’ LANVIEW, a built-in visual diagnostic and status
monitoring system. LANVIEW LEDs are more effective
than a network monitor because a network troubleshooter
can quickly scan the LEDs to diagnose network problems
and to determine which node or segment is faulty.
The following discusses the function and purpose of each
LANVIEW LED on the FOT-F3 Fiber Optic Transceiver.
See Figure 4-2.
Optical Link OK (LNK) LED
When lit, this green LED indicates that a link has been
established between the receive circuitry of the FOT-F3
and the transmit circuitry of the fiber optic device at the
other end of the fiber optic link segment. This LED
remains lit as long as the link is maintained.
To ensure that a link is maintained, the transceiver
generates a 1 MHz idle signal when it is not transmitting
data.
Collision (CLN) LED
This red LED flashes to indicate that the FOT-F3 is
detecting a collision condition. The frequency of flashes
increases as the network activity increases since more
collisions are likely to occur. The flash of the LED is
pulse-stretched for viewing effect.