Table of Contents
1Scope
2References
3Definitions
4Abbreviations
5Description
5.1Applicationtointerfacestructure
5.2CapabilitiessupportedbythisRecommendation
6Operationalrequirements
6.1Provisionandwithdrawal
6.2Requirementsontheoriginatingnetworkside
6.3Requirementsonthedestinationnetworkside
7Primitivedefinitionsandstatedefinitions
7.1Primitivedefinitions
7.2Statedefinitions
7.2.1Callstates
7.2.2Bearerstates
8Codingrequirements
8.1Messagesforseparatedcallcontrol
8.1.1ALERTING
8.1.2CALLPROCEEDING
8.1.3CONNECT
8.1.4CONNECTACKNOWLEDGE
8.1.5RELEASE
8.1.6RELEASECOMPLETE
8.1.7CALLSETUP
8.1.8STATUS
8.1.9STATUSENQUIRY
8.1.10NOTIFY
8.2Informationelements
8.2.1Messagetype
8.2.2Callidentifier
8.2.3Callcapability
9SignallingproceduresatthecoincidentSBandTB
referencepoint
9.1Establishmentofaseparatedcallatthe
originatinginterface
9.1.1Callrequest
9.1.2Invalidcallcontrolinformation
9.1.3Callproceeding
9.1.4Callconfirmationindication
9.1.5Callacceptance
9.1.6Callrejection
9.2Callestablishmentatthedestinationinterface
9.2.1Incomingcallrequest
9.2.2Callconfirmation
9.2.3Callacceptance
9.2.4Activeindication
9.3Callclearing
9.3.1Exceptionconditions
9.3.2Callclearinginitiatedbytheuser
9.3.3Clearinginitiatedbythenetwork
9.3.4Callclearingcollision
9.3.5Interactionbetweencallcontroland
bearercontrol
9.4Restartprocedures
9.5Handlingoferrorconditions
9.6Errorprocedureswithexplicitactionindication
9.7Notificationprocedures
10SignallingproceduresattheTBreferencepoint
11Interworkingwithothernetworks
12Interactionswithsupplementaryservices
13Parametervalues
14DynamicdescriptionSDLs
AnnexA-Additionalproceduresforpre-negotiation(Optional)
AppendixI-Additionalproceduresforsimultaneous
establishmentofthefirstbearerwiththecall
I.1-Statedefinitions
I.2-Codingrequirements
I.2.1-Messages
I.3-Procedures
I.3.1-Simultaneouscallandbearer
establishment
I.3.2-Firstbearerclearing
I.3.3-Callclearing
AppendixII-Protocolmodelandrelatedentities
II.1-Fieldofapplication
II.2-CallandBearercontrolprotocolsintheDSS2
architecture
II.3-Objectidentifiers
AppendixIII-Guidelinesfortheuseoftheinstruction
indicator
AppendixIV-Examplesofmessageflowsforseparatedcall
andbearercontrol Abstract
This document belongs to the DSS2 family of ITU-T Recommendations and defines extensions to Recommendation Q.2931 to specify the additional DSS2 protocol elements (messages, information elements, procedures and functions) necessary to support the separated control (establishment and clearing) of a point-to-point call. This Q.2931-based separated call control protocol requires the use of the bearer control protocol defined in Recommendation Q.2983 to add and remove bearers to/from the call.
