ITU Q.764:1999
ITU Q.764:1999 Signalling System No. 7 - Isdn User Part Signalling Procedures Describes the ISDN User Part signalling procedures of the set-up and clear down of national and international ISDN connections used for "ISUP 2000".
Table of Contents
1General1.1Scope
1.2References
1.3Definitions
1.4Abbreviations
2Basiccallcontrolandsignallingprocedures
2.1Successfulcallset-up
2.1.1Forwardaddresssignalling-Enbloc
operation
2.1.2Forwardaddresssignalling-Overlap
operation
2.1.3Callingpartynumber
2.1.4Addresscompletemessageorconnectmessage
2.1.5Callprogress(Basiccall)
2.1.6Informationmessages
2.1.7Answermessage
2.1.8Continuity-check
2.1.9Charging
2.1.10Forwardtransfermessage
2.1.11Transitnetworkselection(nationaluse)
2.1.12Simplesegmentation
2.1.13ProcedureforNx64kbit/sConnection
Type
2.2Unsuccessfulcallset-up
2.2.1Actionsatexchangeinitiatingarelease
message
2.2.2Actionsatintermediateexchange
2.2.3Actionsatthecontrollingexchange(i.e.
theexchangecontrollingthecall)
2.2.4Tonesandannouncements
2.2.5Addressincomplete
2.3Normalcallrelease
2.3.1Releaseinitiatedbyacallingparty
2.3.2Releaseinitiatedbyacalledparty
2.3.3Releaseinitiatedbythenetwork
2.3.4Storageandreleaseofinitialaddress
messageinformation
2.3.5Pre-releaseinformationtransport
2.4Suspend,resume
2.4.1Suspend
2.4.2Resume
2.4.3Expirationoftimer(T6)ortimer(T38)
2.5Signallingproceduresforconnectiontypeallowing
fallback
2.5.1Actionsintheforwarddirection
2.5.2Actionsinthebackwarddirection-
fallbackindicatedbeforeanswer
2.5.3Actionsinthebackwarddirection-fallback
indicatedatanswer
2.5.4Actionsinthebackwarddirection-
fallbackdoesnotoccur
2.6Propagationdelaydeterminationprocedure
2.6.1Procedure
2.7Echocontrolsignallingprocedures
2.7.1Introduction
2.7.2Enhancedechocontrolsignallingprocedures
2.7.3Simpleechocontrolsignallingprocedures
2.7.4Interworkingconsiderations
2.8Networkfeatures
2.8.1Automaticrepeatattempt
2.8.2Blockingandunblockingofcircuitsand
circuitgroups
2.8.3Circuitgroupquery(nationaluse)
2.9Abnormalconditions
2.9.1Dualseizure
2.9.2Transmissionalarmhandlingfordigital
inter-exchangecircuits
2.9.3Resetofcircuitsandcircuitgroups
2.9.4Failureintheblocking/unblockingsequence
2.9.5Receiptofunreasonablesignalling
informationmessages
2.9.6Failuretoreceivea"releasecomplete"
message-TimerT1andT5
2.9.7Failuretoreceivearesponsetoan
informationrequestmessage(national
use)
2.9.8Otherfailureconditions
2.9.9TemporaryTrunkBlocking(TTB)(nationaluse)
2.10ISDNUserPartsignallingcongestioncontrol
2.10.1General
2.10.2Procedures
2.11Automaticcongestioncontrol
2.11.1Receiptofareleasemessagecontainingan
automaticcongestionlevelparameter
2.11.2Actionstakenduringoverload
2.12Unequippedcircuitidentificationcodemessage
(nationaluse)
2.13ISDNUserPartavailabilitycontrol
2.13.1General
2.13.2Procedures
2.14MTPPause/Resume
2.15Overlengthmessages
2.16SupportforTemporaryAlternativeRouting(TAR)
2.17Hopcounterprocedure
2.17.1Actionsattheinitiatingexchange
2.17.2Actionsatanintermediateexchange
2.17.3Actionsatthedestinationlocalexchange
2.18Callcollectrequestprocedure
2.19Supportforhardtoreachnetworkmanagementfunctions
2.19.1ExchangeinitiatingHTRindication
2.19.2ExchangereceivingHTRindication
2.20Callinggeodeticlocationprocedure
2.20.1Introduction
2.20.2Transferofgeodeticinformation
AnnexA
AnnexB-Figuresonbasiccallcontrolsignallingprocedures
AnnexC-Examplesofechocontrolsignallingprocedures
C.0Interworkingmodel
C.1Basiccallset-upforthecasewhereallexchanges
supporttheenhancedechocontrolsignalling
procedures,andhaveechocontrolequipment
available
C.2Callset-upincorporatingmultipleforwardingfor
thecasewhereallexchangessupporttheenhanced
echocontrolsignallingprocedures,andecho
controlequipmentisnotavailableinallexchanges
C.3Basiccallset-upforthecasewhereallexchanges
supporttheenhancedechocontrolsignalling
procedures,andechocontrolequipmentisnot
availableinallexchanges
C.4Interworkingwithsignallingsystemsinthe
precedingnetworkthatdonotsupporttheenhanced
echocontrollogiccontrolsignallingprocedures
C.4.1Interworkingfromthesimpleechocontrol
signallingprocedures
C.4.2InterworkingfromQ.764(1992version)
C.5Interworkingwithsignallingsystemsinthe
succeedingnetworkthatdonotsupportthe
enhancedechocontrollogicsignallingprocedures
C.5.1Interworkingtothesimpleechocontrol
signallingprocedures
C.5.2InterworkingtoQ.764(1992version)
C.6Interworkingbetweenanexchangesupportingthe
simpleechocontrolsignallingprocedures
andQ.764(1992version)
C.6.1Interworkingfromanexchangesupportingthe
simpleechocontrolsignallingprocedures
toQ.764(1992version)
C.6.2InterworkingfromanexchangeusingQ.764
(1992version)toanexchangesupportingthe
simpleechocontrolsignallingprocedures
C.7Exchangessupportingtheenhancedechocontrol
signallingproceduresinteractingwithintelligent
networkentities
AnnexD-Examplesofsignallingproceduresforconnection
typeallowingfallback
AnnexE-Testcalls
E.1Callednumberfortestcalls
E.2Accountingoftestcalls
AnnexF-Causevalues
AnnexG-Startupprocedures
G.1Initialprocedureforputtingthefirstgroupof
circuitsintoservice
G.2Initialprocedureforputtingadditionalcircuits
intoservice
G.3Testprocedures