This counter tracks the number of STAT PDUs transmitted on this port, per the description, sent in response to a received POLL to report this port's current sequenced-data receive state (including any detected gaps, up to the svcAtmConfigQSaalMaxStat limit). Since a missing STAT reply is what ultimately drives the far end's MaxCC loss-of-connection counter upward, this transmit count relative to NumPollPduRx is a direct measure of this port's responsiveness on the signaling link from the far end's point of view. A shortfall here is a leading indicator of the far end eventually declaring this link down.