ITU Q.2931:1995

ITU Q.2931:1995 Digital Subscriber Signalling System No. 2 (dss 2) - User-network Interface (uni) Layer 3 Specification For Basic Call/connection Control Establishes procedures for maintaining and clearing of network connections at the B-ISDN user-network interface.

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Table of Contents

1Scope
1.1Definitions,abbreviationsandreferences
1.2Applicationtointerfacestructure
1.3CapabilitiessupportedbythisRecommendation
2Overviewofcall/connectioncontrol
2.1B-ISDNcall/connectionstates
2.2AdditionalB-ISDNcall/connectionstatesrelatingto
interworkingrequirements
2.3B-ISDNcall/connectionstatesforglobalcall
reference
3Messagefunctionaldefinitionsandcontent
3.1MessagesforB-ISDNcallandconnectioncontrol
3.2Additionalormodifiedmessagesrelatedforthe
supportof64kbit/sbasedISDncircuit-modeservices
3.3Messagesusedwiththeglobalcallreference
4Generalmessageformatandinformationelementscoding
4.1Overview
4.2Protocoldiscriminator
4.3Callreference
4.4Messagetype,andmessagelength
4.5VariablelengthinformationelementsforB-ISDN
environment
4.6Informationelementsforthesupportof64kbit/s
basedISDNcircuit-modeservices
5B-ISDNcall/connectioncontrolprocedures
5.1Call/connectionestablishmentattheoriginating
interface
5.2Call/connectionestablishmentatthedestination
interface-Point-to-pointaccessconfiguration
calloffering
5.3Call/connectionestablishmentatthedestination
-Point-to-multipointaccessarrangementcall
offering
5.4Call/connectionclearing
5.5Restartprocedure
5.6Handlingoferrorconditions
5.7Errorprocedureswithexplicitactionindication
5.8Handlingofmessageswithinsufficientinformation
5.9Notificationprocedures
6Proceduresforthesupportof64kbit/sbased
circuit-modeISDNservicesinB-ISDNandaccess
signallinginterworkingbetweenN-ISDNandB-ISDN
6.1Introduction
6.2InformationelementsforN-ISDNservicesinB-ISDN
6.3InterworkingN-ISDN->B-ISDN
6.4InterworkingB-ISDN->N-ISDN
6.5Overlapsendingandreceiving
6.6Notificationofinterworking
6.7Additionalfeatureswithregardtotheprovisionof
N-ISDNservices
7Listoftimers
7.1Timersinthenetworkside
7.2Timersintheuserside
8Primitives
8.1Introduction
8.2Descriptionoftheprimitives
AnnexA-NetworksideandusersideSDLdiagrams
A.1NetworksideSDLdiagrams
A.2UsersideSDLdiagrams
AnnexB-Compatibilitychecking
B.1Introduction
B.2Callingsidecompatibilitychecking
B.3Calledsidecompatibilityandaddresschecking
AnnexC-Broadbandlowlayerinformationnegotiation
C.1General
C.2Lowlayercompatibilitynotificationtothecalled
user
C.3B-LLInegotiationbetweenusers
C.4Alternaterequestedvalues
AnnexD-Transitnetworkselection
D.1Selectionnotsupported
D.2Selectionsupported
AnnexE-Mappingfunctionstosupport64kbit/sbased
circuit-modeISDNservicesinB-ISDNandinter-
workingbetweenN-ISDNandB-ISDN(DSS1/DSS2)
E.1Introduction
E.2MappingfunctionsforthedirectionDSS2->DSS1
E.3MappingfunctionsforthedirectionDSS1->DSS2
E.4Codepointvaluesofinformationelementstosupport
64kbit/sbasedcircuit-modeISDNservicesinB-ISDN
AnnexF-ATMadaptionlayerparametersindicationand
negotiation
F.1General
F.2ATMadaptionlayerparameterindicationintheSETUP
message
F.3MaximumCPCS-SDUsizenegotiation
F.4MIDrangenegotiation
F.5UseofforwardandbackwardmaximumCPCS-SDUsize
bytheAALentityintheuserplane
AnnexG
AnnexH-Extensionsforsymmetriccalloperation
AnnexI-HandlingoftheOAMtrafficdescriptor
I.1UseoftheOAMtrafficdescriptorinformation
element
I.2HandlingoftheOAMtrafficdescriptorinformation
elementintheSETUPmessage
I.3Procedureatthedestinationuser-networkinterface
AnnexJ-Definitions,AbbreviationsandReferences
J.1Definitions
J.2Abbreviations
J.3References
AnnexK-HandlingoftheEnd-to-endtransitdelayinforma-
tionelement
K.1General
K.2HandlingoftheEnd-to-endtransitdelayinformation
elementintheSETUPmessageattheoriginatingUNI
K.3HandlingoftheEnd-to-endtransitdelayinformation
elementintheSETUPmessageatthedestinationUNI
K.4HandlingoftheEnd-to-endtransitdelayinformation
elementbythecalleduser
K.5HandlingoftheEnd-to-endtransitdelayinformation
elementintheCONNECTmessageatthedestination
UNI
K.6HandlingoftheEnd-to-endtransitdelayinformation
elementintheCONNECTmessageattheoriginating
UNI
AnnexL-ExamplesforMessageStructureandInformation
ElementFormat
L.1Introduction
L.2Structureusingofaninformationsubfield
identifiers
L.3Theorderingofinformationelements
AppendixI-GuidelinesfortheuseofInstruction
indicators
AppendixII-Informationitemsforconnectionestablishment
inISBN
II.1Scope
II.2Informationitemsspecifiedbythecallingterminal
AppendixIII-StatusmonitoringproceduresforSemi-Permanent
VirtualChannelConnections
III.1MessagesusedforSPCstatus
III.2Generalinformationelements
III.3Otherinformationelements
III.4ProceduresacrosstheUNI
III.5Errorconditions
III.6Systemtimers
III.7Systemparameters

Abstract

Establishes procedures for maintaining and clearing of network connections at the B-ISDN user-network interface.

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