This object is the priority value, 0 through 7, compared against each packet's 3-bit SRP priority field to decide whether it goes into the high-priority or low-priority transmit and transit queue. Since SRP only has two priority queues despite packets carrying 3 bits of priority, this threshold is what actually determines the dividing line: set it too high and traffic an admin intended to get priority treatment, such as voice, ends up in the low-priority queue during ring congestion. Setting srpPriorityThreshold to 4 means packets marked priority 4 through 7 get the high-priority queue on this ring interface, while anything marked 0 through 3 is treated as low priority even during congestion.