This Gauge32 counts NetBIOS packets filtered by the STU during the current 15-minute period. NetBIOS name-service and browsing broadcasts from Windows file/printer sharing were a common source of unwanted upstream chatter on early cable networks, so this count reflects how much of that traffic is being suppressed on this subscriber's link. For example, a household with several Windows PCs doing network-neighborhood browsing would generate a steady trickle of NetBIOS broadcasts that this counter accumulates as filtered.