∙Collision—This LED blinks when there are packet collisions on the module link.
∙FDX—This LED is lit when the port is set for full duplex transmit and receive. When the LED is off, the port is in half duplex mode.
The duplex mode DIP switch allows you to set the port to full duplex mode operation. Only the right-hand switch (number 2) is active. Use the DIP switch to set the duplex mode.