Table of Contents
1Scope
2Introduction
2.1DirectEndpointSignalling
2.2GatekeeperRoutedSignalling
2.3DecomposedGateway
2.4H.248manageddevices
2.5Stimulusdevice
3References
4Definitions
5Abbreviations
6Multi-levelPrecedenceandPreemptionServicedescription
6.1Provisionofprecedencelevels
6.2Preemptionoffacilities
6.3Diversion
6.4Interactionswithotherservices
7SignallingelementsforMLPP
7.1Featureidentifier
7.2Parameter
8Procedures
8.1Registration,AdmissionandStatus(RAS)
8.2CallsignallingproceduresforH.450endpoints
9Dynamicdescription
9.1Operationalmodel
9.2Signallingflows
9.3Callstates
9.4Timers
10SpecificationandDescriptionLanguage(SDL)diagrams
forMLPP
10.1BehaviourofUserA'sendpoint
10.2BehaviourofUserB'sendpoint
10.3BehaviourofUserC'sendpoint
11Protocolinteractionswithotherendpointfeatures
11.1Functionalendpoints
11.2Stimulus-basedendpoints
11.3InterworkingwithSwitchedCircuitNetwork
AnnexA-ASN.1definition Abstract
Describes the procedures and the signalling protocol for Multi-Level Precedence and Preemption (MLPP), which allow the originator of a call in an H.323 environment to specify a precedence level of the call and for an existing lower precedence call to be preempted to release resources needed to complete that higher precedence call.
