This read-write INTEGER (0-7) sets the highest Token Ring frame priority value that still gets routed to this port's low-priority transmit queue rather than a higher-priority queue; frames with priority above this threshold get preferential queuing. An admin prioritizing latency-sensitive traffic over bulk data on a congested port would lower this threshold so more priority levels bypass the low-priority queue. Setting this to 3 means priorities 0-3 use the low-priority queue while 4-7 get preferential treatment.