This is a running counter of the total number of packets transmitted (outgoing) on this specific pseudowire toward the remote peer. Comparing this against the incoming packet counter on the same PW gives a rough sense of traffic symmetry for the service, and comparing it against the peer's own incoming counter, if accessible, can help isolate where in a bidirectional flow packets might be getting dropped. A pseudowire with healthy outgoing counts but stalled incoming counts would point specifically to a receive-direction problem rather than a transmit-side one.