This counter counts the number of bursty errored seconds (BES) encountered by the DS1 interface during the current day, representing 1-second periods with multiple bit errors but not enough to qualify as severely errored. Bursty errors often indicate intermittent noise bursts or short-lived interference on the line rather than a systemic problem. Monitoring this helps distinguish between random noise (which may be tolerable) and systematic degradation (which requires action).