Description: Additional status information for the port. The value is a sum. It initially takes the value zero, then for each state that is true, 2 raised to a power is added to the sum. The powers are according to the following table: State Power Transmit 0 Receive 1 Collision 2 Transmit state indicates that at least one packet was transmitted by the port in the last polling period. Receive state indicates that at least one packet was received by the port in the last polling period. Collision state indicates that at least one collision was detected on the port in the last polling period. Note that if a state is not applicable to a particular port or additional status is not supported on a particular port, its value is always false for that port.