This read-only PerfTotalCount reports the count of aborted frames received on the DSL port, scoped to one specific 15-minute bucket out of the 96 stored for that DSL port. Operationally, aborted frames indicate the far end deliberately or accidentally cut a frame short mid-transmission, a sign of link instability. For example, a cluster of aborted frames in a handful of consecutive 15-minute buckets suggests the line was unstable during that specific window, useful for correlating with a storm or maintenance event.