This field reports the cumulative count of frames transmitted successfully after exactly one collision, tracked by this particular stats object since it was created or last reset. For a network admin, some background collision activity here is normal on a shared or half-duplex segment, so admins usually only worry when this count grows in step with multiCollision and excessCollision on the same port. For example, a cumulative value of 9 frames since the interface came up would still be within a tolerable range, whereas a rapidly climbing count in the hundreds would justify escalation.