This read-only PerfTotalCount reports the count of frames successfully transmitted on the DSL port, scoped to the most recent rolling 24-hour period ending at the moment of the poll. Operationally, it's the baseline throughput indicator for outbound traffic and confirms the port is actually pushing data toward the customer. For example, an admin comparing this rolling 24-hour transmitted-frame total across several ports can rank which lines are pushing the most outbound traffic over a full day.