This counts PW packets that arrived so far out of sequence that the receive buffer could not reorder them and had to discard them. Unlike Reorder, Missorder on this pseudowire represents packets effectively lost from the TDM playback's point of view, so a rising Missorder count means the jitter buffer depth configured for this service is too shallow for the reordering/delay variation the network is actually producing -- and this specific object covers a cumulative counter reset only by an explicit clear rather than on a fixed schedule -- reflecting everything since PM stats were last cleared. For example, since PM counters were last cleared, this pseudowire might show this counter at 40 -- a concrete count the admin can trend against neighboring bins to judge whether the condition it reflects is worsening.