This read-only Gauge32 reports the current number of frames queued for transmission on this PVC and waiting for space on the device's transmit queue. An admin checks this OID to see real-time evidence of outbound congestion on a specific circuit before frames start getting dropped. For example, a persistently high queued-frame count on one PVC, even as ibmframerelayPVCTxDropped stays low, suggests the circuit is nearing its capacity and heading toward drops.