This counter tracks the number of STATUS messages, sent either in reply to a STATUS ENQUIRY or unsolicited to report a protocol error or unexpected call state that this port has transmitted, per the description. Because STATUS can be either a solicited reply or a spontaneous error report, a rise in STATUS transmissions on this port that isn't matched by a corresponding rise in STATUS ENQUIRY receipts suggests the switch is spontaneously detecting protocol errors rather than just answering queries. For example, an admin comparing this counter to NumStatusEnqPduRx can tell whether STATUS traffic on this port is routine query-response or a symptom of a deeper signaling problem generating unsolicited error reports.