AdslPerfPrevDayCount
A counter associated with interface performance measurements during the most previous 1-day (24 hour) measurement interval. The value of this counter is equal to the value of the current day counter at the end of its most recent interval. In the case where the agent has no valid data available for this interval the corresponding object instance is not available and upon a retrieval request a corresponding error message shall be returned to indicate that this instance does not exist (for example, a noSuchName error for SNMPv1 and a noSuchInstance for SNMPv2 GET operation).