Wireless Station with QOS disabled
Observer has sensed a station on air that has the QOS (Quality of Service) feature disabled. Wireless QOS (which is not supported by all vendors) allows you to prioritize traffic for devices such as wireless VoIP phones.
Possible reasons for the event:
A rogue station is probing your network for vulnerabilities.
A legitimate user has inadvertently left QoS features disabled on the station.
You are seeing crosstalk from a nearby wireless network unrelated to your network.