Originally Posted by BillyMac

Not quite. Team A has six players participating. A violation, or a foul is called. During the dead ball time immediately following the violation, or the foul, Team A notices that is has an extra player on the court and pulls that player off the court. At that time, as the sixth player is walking off the court, the infraction is recognized by the official, before the ball becomes live. At this time it is not too late to penalize for the sixth player. If the ball had become live after this situation, and then the table yelled to the officials that there were six Team A players participating a few seconds ago, then it would be too late to penalize.