Perle Systems 5500305-20 Other Features, Default Operating Mode, Auto-MDIX with Skew Correction

Other Features

Default Operating Mode:

In the default operating mode (all switches up), the Media Converter Module 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 Module will not see a loss of link if the fiber connection is lost.

Auto-MDIX with Skew Correction:

Auto-MDIX (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 Module can also correct for wires swapped within a pair.

Error Recovery:

In certain configurations, and under specific conditions where the Media Converter Module 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 Media 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.

Gigabit Media Converter Module – Installation Guide 14