To connect a 100Mbps fiber-to-electrical port module, insert a 100BASE-FX SFP into the SFP port, connect the multimode fiber cables to the transmit and receive ports, and link the electrical Ethernet port to your network device.

Step-by-Step Connection

1. Prepare the SFP Module and Fiber Cable Use a 100BASE-FX SFP transceiver designed for 100Mbps Fast Ethernet over multimode fiber, typically operating at 1310nm with LC connectors. Ensure the fiber cable is compatible with the SFP module and supports the required distance (up to 2 km for standard multimode fiber) . 2. Insert the SFP Module Carefully insert the SFP module into the SFP port of your media converter, switch, or router. The module is hot-swappable, so the device does not need to be powered off, but handle it gently to avoid damaging the pins . 3. Connect Fiber Cables

• Connect the transmit (TX) port of the SFP module to the receive (RX) port of the remote module.
• Connect the receive (RX) port of the SFP module to the transmit (TX) port of the remote module. This ensures proper bidirectional communication . 4. Connect the Electrical Ethernet Port If using a media converter (e.g., Comnet CNFE2MC), connect the RJ-45 copper port to your network switch or router using a standard Cat5e or Cat6 cable. The media converter will handle the conversion between electrical and optical signals . 5. Verify Link and Signal Check the link LEDs on both the SFP module and the media converter or switch. A solid link light indicates successful communication. If the link does not establish, verify fiber polarity, module compatibility, and that the PHY is configured for fiber operation if applicable . 6. Optional Configuration Some devices allow configuration of duplex mode or link speed. For 100BASE-FX, ensure the device is set to 100Mbps full-duplex to match the SFP module specifications .

Best Practices

• Keep fiber connectors clean to avoid signal loss.
• Avoid bending fiber cables sharply; maintain the minimum bend radius.
• Use proper SFP modules recommended by the device manufacturer to ensure compatibility.
• Label fiber cables to prevent confusion between TX and RX connections. By following these steps, you can establish a stable 100Mbps fiber link between your electrical Ethernet network and fiber infrastructure, ensuring reliable communication in industrial, enterprise, or legacy network environments .