How much fiber optic cable is considered a high-loss cable
5 dB loss per connector is common and typically represents the worst case scenario, assuming that a cleaned and polished connector is used. Note that there will always be a minimum of two connectors per fiber segment, so remember to multiply connector loss by two. To be able to judge whether a fiber optic cable plant is good, one does a insertion loss test with a light source and power meter and compares that to an estimate of what is a reasonable loss for that cable plant. The estimate, called a "loss budget" is calculated using typical component losses for. Fiber loss, or attenuation, refers to the reduction in optical power as light travels through a fiber optic cable.
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