This read-only counter reports the number of incoming voice calls that completed successfully at a specific subscriber voice end point, with rows indexed by the same end-point index used across the device's AAL2, GR303, V52, and POTS subscriber tables. It provides the finest-grained visibility in this MIB, down to an individual subscriber line rather than a card or the whole system. An admin investigating a single customer's call issues would check this counter for that subscriber's end point to confirm calls are actually completing.