Gently Disconnect the Cables: Carefully unplug the patch cables from both devices, ensuring not to damage the connectors or cables. Swap the Connections: Switch the connections by plugging the cable that was in the TX port of Device A into the RX port of Device B, and vice versa. This article will guide you through the process of troubleshooting fiber optic connections, with a focus on ensuring proper TX and RX alignment and how to correctly switch patch cables to resolve issues. Is the link light on? A solid link light means Layer 1 is working. Over time, repeated plugging and unplugging can cause microscopic damage, reducing signal quality. Using a Patch. Flipping both ends puts you right back where you started. In 2025, connecting two switches with 1G/10G/25G/100G (SR/LR) fiber is still stupidly simple: Buy any normal duplex LC-LC patch cable → plug it in → if no link, flip one end 180° → done. Common Fibre Optic Cable Issues: - Symptoms: Decreased signal strength, intermittent.
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