This is the Severely Errored Seconds the remote terminal reported for one specific completed 15-minute bucket in the far-end interval history. A single interval showing an elevated far-end SES count while neighboring intervals are clean tells an admin the outbound-direction degradation was a short, sharp event rather than a slow drift, useful for correlating against maintenance logs or weather events affecting the outside fiber plant. A reading of 8 in one interval, against the shared threshold of 3, would flag that specific quarter-hour even though the surrounding intervals stayed under threshold.