GE DS2020EXTYG2 Switch input module

The twisted pair port and fiber optic port on the media converter can operate in half-duplex, full-duplex, or auto-negotiate the duplex mode. The media converter sets the duplex mode automatically through auto-negotiation. With auto-negotiation, if the end-node is capable of full-duplex, the port is set automatically to full-duplex mode. If the end-node is capable of half-duplex, the port is set automatically to half-duplex mode.

The AT-MC115XL and AT-MC116XL media 

converters can operate in fullduplex, half-duplex, or auto-negotiate the duplex mode. However, the endnodes connected to these media converters must operate in the same duplex mode to avoid a duplex mode mismatch, which can result in poor network performance. Figure 3 shows an example of a duplex mode mismatch. A repeater (Unit 1), capable of operating in half-duplex mode only, is connected to the 100Base-SX port on the media converter, while a switch (Unit 2), capable of either half- or full-duplex mode, is connected to the 10Base-T/100Base-TX port on the media converter.

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