This read-only five-character string encodes the PVC's current signaling status, with individual character positions flagging conditions such as N for a new PVC, A for active, C for CIR reached, and F or B for forward or backward congestion toward or from the destination PVC. An administrator reads the specific characters present to quickly diagnose congestion or setup issues on the circuit without pulling multiple separate counters. For example, seeing an F in statPvcInfoSignal would tell the administrator the local unit is signaling forward congestion toward the destination PVC and that traffic may need to be throttled.