In military communications, Multilevel Precedence and Preemption (MLPP) is a priority scheme (a) for assigning one of several precedence levels to specific calls or messages so that the system handles them in a predetermined order and time frame, (b) for gaining controlled access to network resources in which calls and messages can be preempted only by higher priority calls and messages, (c) that is recognized only within a predefined domain, and (d) in which the precedence level of a call outside the predefined domain is usually not recognized.
The International Telecommunications Union approved the MLPP recommendation in March 1993.[1]
This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C".