csDs3StatCurrentLSESs is a read-only PerfCurrentCount counter reporting the number of Line Severely Errored Seconds — a one-second period with a heavy burst of line bipolar violations — that this unchannelized DS3/E3 physical line has recorded in the current 15-minute measurement interval, i.e. right now. (this counter applies to both DS3 and E3 line types) A rising count here is the operational signal that a badly degraded copper/coax DS3 or E3 line, connector, or repeater is happening on that interface, which is exactly the kind of degradation a monitoring admin wants an early warning of before it causes an outage. For example, an admin polling csDs3StatCurrentLSESs on this unchannelized DS3/E3 physical line every few seconds and watching the count jump upward in real time would immediately suspect a badly degraded copper/coax DS3 or E3 line, connector, or repeater, and could start a bit-error-rate test before the fault gets worse.