Multilevel precedence and preemption
Encyclopedia
In military communications
Telecommunication
Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded...

, Multilevel Precedence and Preemption (MLPP) is a priority
Priority
Priority may refer to:* Priority date, a concept of establishing waiting times in the immigration process by United States Department of State* Priority level, the priority of emergency communications...

 scheme (a) for assigning one of several precedence
Message precedence
-CCEB military precedence:The Combined Communications-Electronics Board , a five-nation joint military communications-electronics organization , uses the following message precedence designators, in descending order of importance:-FLASH :This precedence is reserved for initial enemy contact...

 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
Telecommunications network
A telecommunications network is a collection of terminals, links and nodes which connect together to enable telecommunication between users of the terminals. Networks may use circuit switching or message switching. Each terminal in the network must have a unique address so messages or connections...

 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
Broadcast domain
A broadcast domain is a logical division of a computer network, in which all nodes can reach each other by broadcast at the data link layer. A broadcast domain can be within the same LAN segment or it can be bridged to other LAN segments....

, and (d) in which the precedence level of a call
Telephone call
A telephone call is a connection over a telephone network between the calling party and the called party.-Information transmission:A telephone call may carry ordinary voice transmission using a telephone, data transmission when the calling party and called party are using modems, or facsimile...

 outside the predefined domain is usually not recognized.

The International Telecommunications Union approved the MLPP recommendation in March 1993.
  • ANSI PRI T1.619a
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