This read-write integer sets the low-water-mark percentage-times-100 share of Severely Errored Seconds below which the terminal exits its SES alarm state. An administrator configures this below the high threshold to add hysteresis and avoid the SES alarm oscillating around the boundary. For example, requiring the SES ratio to drop well below the trigger point before clearing avoids a flurry of alarm clear-and-reassert events during a marginal storm-affected link.