This rolls together the collided-but-recovered frames transmitted out this port -- single and multiple collisions alike, short of the late or excessive cases tracked separately. Any nonzero trend in this counter during today's still-accumulating 24-hour bin matters on its own, independent of the more severe TxLateCollPkts/TxExCollPkts counters for the same port, because a switched full-duplex Carrier Ethernet trunk should never see collisions at all. For example, a steady 60-count climb for this in-progress 24-hour bin on an interface that used to read a flat zero points at a newly introduced shared-media device or a duplex change somewhere upstream of this port.