This read-only Gauge reports the number of Bursty Errored Seconds (BESs) encountered by this DS1 interface in one specific historical 15-minute interval, a category counting seconds with a moderate cluster of errors (more than isolated single-bit errors but not severe enough to qualify as a Severely Errored Second). This fills in the middle ground of the error-severity spectrum between plain Errored Seconds and Severely Errored Seconds, giving a more nuanced historical picture of error character. An engineer distinguishing chronic low-level line noise from occasional severe events would look at the ratio of dsx1IntervalBESs to dsx1IntervalSESs across several intervals to characterize the nature of the DS1's error pattern.