High-splice loss or too many connectors in the path. Symptoms: Intermittent connectivity, high error rates, reduced operational distance, link instability. DOM data will show low Rx power. Measure Link Loss: Use an Optical Loss Test Set (OLTS) to certify fiber. Even tiny imperfections scatter or block light, causing signal loss (attenuation), errors (BER increase), or complete link failure. Often manifests as "flapping" links. Always use. Understanding and addressing these errors is key to ensuring reliability and performance. Bit Error Rate (BER) is a measure of signal integrity in data transmission systems, typically defined as the average ratio of the number of erroneously received bits to the total number of bits transmitted. Therefore, it is essential to select optical.
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