This read-only counter reports the number of outgoing voice calls blocked at a specific subscriber voice end point, indexed the same way as the other subscriber-level counters. A rising value isolated to one end point suggests a line-specific issue -- such as a provisioning error or feature restriction -- rather than a card-wide or system-wide fault. An admin uses this counter to confirm whether outbound call failures reported by a customer are actually occurring at the network element for that line.