It's a fairly simple solution; unplug the LC couplers on the TAPs' network ports A and B and reverse the polarity, only at the end connected to the TAP. 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. Your Fiber cabling is complte and you've inserted brand-new SFPs, cleaned the connectors, and used what looks like a perfect fiber patch cable. yet the link LEDs stay red or amber. In an Ethernet environment, this can. Since most fiber optic links use two fibers transmitting in opposite directions to create a full duplex link, you need to ensure that transmitters are connected to receivers and vice versa. To achieve this goal, international standards (such as TIA-568.
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