Abstract: A method and system for priority access channel allocation within a telecommunication subsystem in which channel access requests are categorized within a prioritization system that includes a first priority level, and a second priority level which is lower than in priority with respect to the first priority level. A targeted blocking rate is first assigned to the first priority level. During active operation of the telecommunication subsystem, a statistical estimation of an actual traffic intensity for the first priority level is performed. Thereafter, the targeted blocking rate and estimated traffic intensity are utilized in computing a blocking threshold for the first priority level. This blocking threshold defines a number of channels, n, to which access by the second priority level will be blocked, such that the first priority level may achieve its assigned targeted blocking rate.