Specifies the relative priority of ATM cells incoming from this LIM or CM slot. A slot's incoming-priority is used to select the appropriate outgoing queue that is associated with the outgoing port from the internal ATM cell processing engine. All ports on this slot and all ATM service categories share the same incoming-priority. An outgoing port (from the internal ATM cell processing engine) can have multiple queues associated with a given QoS. The incoming-priority is used to select which queue to use among all the queues associated with the given QoS.