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Gigabit Media Converter – Installation Guide
11
Other Features
Default Operating Mode:
In the default operating mode (all switches up), the media
converter will auto-negotiate on both the fiber and the copper links
at the same time, thus achieving the best end-to-end Ethernet
operating parameters. If the fiber link is not present, it will still
permit the copper link to be established, but will not negotiate a
fiber link if the copper link is not present. Therefore the device
attached to the media converter will not see a loss of link if the
fiber connection is lost.
Auto-MDI-X with Skew Correction:
Auto-MDI-X (automatic medium-dependant interface crossover)
detects the signalling on the 1000BASE-T interface to determine
the type of cable connected (straight-through or crossover) and
automatically configures the connection. The media converter can
also correct for wires swapped within a pair.
Error Recovery:
In certain configurations, and under specific conditions where the
media converter brings down a link to convey status, there is
potential for a deadlock. Recovery is achieved by momentarily
restoring the link to see if the original failure has been resolved. If
it has not, the link will be forced down again, however if the
original problem has been resolved, the link will be restored.
Example: If two converters are setup for FFA. The detection of a
fiber link failure (RX) will cause one media converter to disable its
fiber transmitter (TX). This in turn will cause the other to do the
same, and a deadlock condition has been created. The media
converter will periodically turn on its transmitter (TX) to re-start the
link and see if the original failure has been resolved. If not the TX
is once again turned off.