This integer sets the Errored Seconds count that, if exceeded within the current 15-minute Line-layer interval, triggers a statistical alarm, defaulting to 20 and explicitly applying identically to both near-end and far-end statistics. An admin cares because a single threshold value governs alarming for both directions of the line's error reporting, so tuning it affects near-end and far-end sensitivity together rather than independently. For example, raising this threshold to reduce nuisance near-end alarms on a naturally noisier line will equally relax how sensitive far-end alarming is on that same line.