Packets are out of sequence if they do not arrive in the right order. This indicates issues in the network and may affect audio quality in the same way as jitter and packet loss. The test checks if audio packets arrive in the right order.
Very few packets arrive out of sequence and there is no impact on the audio quality.
The amount of packets arriving out of sequence is higher than expected. Still there should be very little impact on the audio quality.
Too many packets arrive in the correct order causing audible impairments. This may be caused by routing issues in the network.
The amount of packets not arriving in the correct sequence could not be determined, e.g. because packets were blocked.