This read-only Gauge32 counts cells in the current 15-minute period whose errors were successfully corrected by forward error correction, per the description. It serves as an early-warning signal of degrading signal quality, since a rising corrected-error count often precedes cells becoming uncorrectable. For example, an admin trending hcxPortCurrMinCorrectedFec upward over several intervals schedules a plant inspection before the errors progress to uncorrectable losses.