SIST EN 301 846 V1.1.1:2005
(Main)Private Integrated Services Network (PISN); Profile Standard for the use of PSS1 (QSIG) in Air Traffic Services networks
General Information
- Abstract
Profile Standard specifying the combination of base Standards, together with selection of options and parameter values for the use of QSIG/PSS1 in Air Traffic Management communication networks.
- Status
- Published
- Publication Date
- 28-Feb-2005
- Technical Committee
- SPN - Services and Protocols for Networks
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Mar-2005
- Due Date
- 01-Mar-2005
- Completion Date
- 01-Mar-2005
- Mandate
- M/239
Overview
SIST EN 301 846 V1.1.1:2005 defines the profile standard for using the PSS1 (QSIG) protocol within Private Integrated Services Networks (PISN) specifically engineered for Air Traffic Services (ATS) environments. Developed by SIST in alignment with European and international telecommunications frameworks, this standard specifies the combination of base standards, parameter values, and options necessary to enable standardized, interoperable digital signaling between Private Integrated Services Network Exchanges (PINX) in air traffic management communication networks.
This document aims to ensure reliable and secure voice and data communication by setting clear requirements for physical and electrical interfaces, data link procedures, call control, supplementary services, and network interconnection. It supports the safe and efficient operation of air traffic services by harmonizing ATS PISN implementations, enhancing vendor interoperability, and reducing the risk of miscommunication.
Key Topics
Physical and Electrical Interface Requirements
- Defines connector types, electrical characteristics, and synchronization methods for ATS networks.
- Ensures compatibility across equipment for seamless integration.
Layered Protocol Architecture
- Details the protocol stack at the ‘C’ reference point, which includes the physical layer (based on standards such as ETS 300 290), data link, and network layers.
- Provides error-free links using symmetric LAP-D and manages speech compression for ATS-specific needs.
Call Control and Supplementary Services
- Outlines procedures for establishing, maintaining, and clearing calls between PINXs with QSIG/PSS1.
- Specifies handling of high-priority and safety-critical calls, including call intrusion and priority interruption.
- Defines how system parameters and information elements (e.g., called/calling party numbers, call states) are managed and signaled.
Implementation and Interoperability
- Describes conformance requirements for ATS PISN equipment, including implementation conformance statements and requirements lists.
- Focuses on achieving interoperability between equipment from different vendors within ATS networks.
Mapping and Multiplexing Functions
- Describes adaptation of internal ATS PISN conditions to standardized external leased line connections, including rate adaptation and sub-multiplexing (4x16kbit/s).
Applications
SIST EN 301 846 V1.1.1:2005 is critical for:
Air Traffic Management (ATM) Networks
- Ensuring reliable, interoperable digital signaling between air traffic control centers and remote facilities.
- Supporting critical communication paths for safety-related voice and data services.
Vendor Equipment Integration
- Providing a consistent framework for different manufacturers’ hardware and software to work together effectively within ATS networks.
Compliance and Procurement
- Serving as a baseline for ATS network procurement, helping organizations specify, purchase, and deploy compliant equipment.
Network Modernization
- Enabling gradual upgrades from legacy communication systems to digital PISN solutions while maintaining operational continuity.
Related Standards
To align with international practices and ensure end-to-end ATS network reliability, SIST EN 301 846 V1.1.1:2005 references and complements numerous standards, including:
- EN 300 172 - PISN inter-exchange signalling protocol for circuit-mode basic services
- ETS 300 239 - PISN signalling protocol for supplementary services
- ETS 300 290 & Amendment 1 - Digital unrestricted leased line interfaces
- EN 301 039 - PISN mapping functions for 64kbit/s connections with 16kbit/s sub-multiplexing
- EN 300 402-2, EN 301 656, EN 300 426, EN 301 048 - Signalling protocols and supplementary/priority services
- ITU-T G.728 - Speech coding for low delay applications
By establishing a unified profile for QSIG/PSS1 use in ATS, SIST EN 301 846 V1.1.1:2005 lays the groundwork for robust, future-ready air traffic communication networks.
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Frequently Asked Questions
SIST EN 301 846 V1.1.1:2005 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Private Integrated Services Network (PISN); Profile Standard for the use of PSS1 (QSIG) in Air Traffic Services networks". This standard covers: Profile Standard specifying the combination of base Standards, together with selection of options and parameter values for the use of QSIG/PSS1 in Air Traffic Management communication networks.
Profile Standard specifying the combination of base Standards, together with selection of options and parameter values for the use of QSIG/PSS1 in Air Traffic Management communication networks.
SIST EN 301 846 V1.1.1:2005 is classified under the following ICS (International Classification for Standards) categories: 33.040.35 - Telephone networks. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 301 846 V1.1.1:2005 is associated with the following European legislation: Standardization Mandates: M/239. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 301 846 V1.1.1:2005 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Zasebno omrežje z integriranimi storitvami (PISN) - Standard profila za uporabo PSS1 (QSIG) v omrežjih s storitvami radijskega prometaPrivate Integrated Services Network (PISN); Profile Standard for the use of PSS1 (QSIG) in Air Traffic Services networks33.040.35Telefonska omrežjaTelephone networksICS:Ta slovenski standard je istoveten z:EN 301 846 Version 1.1.1SIST EN 301 846 V1.1.1:2005en01-marec-2005SIST EN 301 846 V1.1.1:2005SLOVENSKI
STANDARD
ETSIEN301846V1.1.1(2001-07)EuropeanStandard(Telecommunicationsseries)PrivateIntegratedServicesNetwork(PISN);ProfileStandardfortheuseofPSS1(QSIG)inAirTrafficServicesnetworksSIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)2ReferenceDEN/ECMA-00189KeywordsPISN,PSS1,QSIGETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frCopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2001.Allrightsreserved.SIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)3ContentsIntellectualPropertyRights.6Foreword.61Scope.72Conformance.73References.74Definitions.84.1Externaldefinitions.85Abbreviations.96Specificationframework.106.1General.106.2TerminalEquipment(TE).106.3PrivateTerminationSystem(PTS).106.4Switching(SW).116.5Mapping(MP).116.6CallControl(CC).117PhysicalinterfaceandprotocolstackattheCreferencepoint.128Switching(SW)functions.128.1Speechcompression.129Mapping(MP)functions.139.1Physicallayerfunctions.139.1.1Physicalandelectricalinterfacerequirements.139.1.2Rateadaptationandsub-multiplexing.139.1.3AlarmIndicationSignal(AIS).139.1.4Synchronization.139.2Datalinklayerfunctions.149.2.1Generalprocedures.149.2.2Systemparameters.149.3Octetsynchronizationprocedure.1510CallControl(CC)functions-EndPINXcase.1510.1Basiccallestablishmentandclearing.1510.2Messagesegmentationandre-assembly.1510.3STATUSENQUIRYprocedure.1510.4Overlapsending/receivingprocedures.1510.5CallrequestandtransmissionoftheSETUPmessage.1510.6Informationchannelselection.1610.7Agreementofchannelandcallproceeding.1610.8Callconfirmationindication.1710.9Callconnected.1710.10UseofthePROGRESSmessage.1710.11Failureofcallestablishment.1710.12Callclearing.1710.13Callcollisions.1710.14Simultaneouscallattempts.1810.15Alternativerouteing.1810.16Timervalues.1810.17Supportofinformationelements.1910.17.1General.1910.17.2Bearercapability.1910.17.3Callstate.2010.17.4Calledpartynumber.20SIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)410.17.5Callingpartynumber.2010.17.6Cause.2110.17.7Channelidentification.2110.18Restartprocedureforlayermanagement.2110.19GenericFunctionalProtocol.2110.19.1ApplicablepartsoftheGenericFunctionalProtocol.2110.19.2Supportofinformationelements.2210.19.3Integerencodingofoperationvalues.2210.20Specificsupplementaryservices.2310.21Priorityinterruptionandintrusion.2310.21.1Signallingprocedures.2310.21.2Callcontrolprocedures.2310.21.3InvocationofpriorityfunctionsatOriginatingPINX.2410.21.4ExecutionofSS-CPI.2510.22Transitcounter.2511CallControl(CC)functions-TransitPINXcase.2511.1General.25AnnexA(normative):RequirementsList(RL).27A.1General.27A.2RelationshipbetweenRLandcorrespondingPICSproformas.27A.3RequirementList.27A.3.1Tablesforthephysicallayer.27A.3.2Tablesforthedatalinklayer(D-channel).28A.3.2.1Majorcapabilities.28A.3.2.2Framesreceived.28A.3.2.3Framestransmitted.28A.3.3Tablesforthenetworklayer.28A.3.3.1BasicCall(EN300172).28A.3.3.1.1Bearerssupported.28A.3.3.1.2StatusandStatusEnquiryprotocolprocedures.29A.3.3.1.3Circuitswitchedcallcontrol.29A.3.3.1.4Proceduresforlayermanagement.29A.3.3.1.5Timers.29A.3.3.1.6Messagesandinformationelementsforgeneralprocedures.30A.3.3.1.7Messagesegmentation/re-assemblyprocedures.30A.3.3.1.8Partycategoryfunctionality.30A.3.3.2GenericFunctionalProtocol.31A.3.3.2.1CallrelatedprotocolcontrolandGFT-Controlrequirements.31A.3.3.2.2ConnectionlessADPUtransportmechanism.31A.3.3.2.3ConnectionorientedAPDUtransportmechanism.31A.3.3.2.4CoordinationFunctionrequirements.31A.3.3.2.5ACSEandDSErequirements.31A.3.3.2.6Implementedparameters.31A.3.3.2.6.1ALERTINGmessage.31A.3.3.2.6.2CONNECTmessage.32A.3.3.2.6.3SETUPmessage.32A.3.3.2.6.4DISCONNECTmessage.32A.3.3.2.6.5RELEASEmessage.32A.3.3.2.6.6RELEASECOMPLETEmessage.32A.3.3.2.6.7FACILITYmessage.32A.3.3.2.6.8NOTIFYmessage.32A.3.3.2.6.9PROGRESSmessage.32A.3.4TablesforSupplementaryServicesandANFs.33A.3.4.1Callintrusion.33A.3.4.1.1General.33A.3.4.1.2Procedures.34A.3.4.1.3Coding.35A.3.4.1.4Timers.36SIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)5A.3.4.2Callpriorityinterruption(protection).36A.3.4.2.1General.36A.3.4.2.2Procedures.36A.3.4.3Transitcounter.37A.3.4.3.1General.37AnnexB(normative):ProfilespecificICSproforma.38B.1General.38B.2InstructionforcompletingtheICSproforma.38B.2.1GeneralstructureoftheICSproforma.38B.2.2AdditionalInformation.39B.2.3ExceptionInformation.39B.3ICSproforma.39B.3.1ImplementationIdentification.39B.3.2Supportedinterfacesandprotocols.40B.3.3Physicallayer.40B.3.4Datalinklayer.40B.3.5Networklayer(BasicCall).41B.3.6Networklayer(GenericFunctionalProtocol).41B.3.7Priorityinterruptionandintrusionsupplementaryservices.41B.3.8TransitcounterANF.41AnnexC(normative):ProceduresfordetectingandresolvingSimultaneousCallAttemptsonasingleInter-PINXLink.42C.1General.42C.2Descriptionofprocedure.42C.2.1Detectionofasimultaneouscallattempt.42C.2.2Callswithoutcallcollision.42C.2.3Callsofequalpriorityandcallcollision.43C.2.4Callsofunequalpriorityandcallcollision.43C.3SpecificationandDescriptionLanguage(SDL)representationofprocedures.43AnnexD(informative):Facilityinformationelementcontentsencoding.50D.1General.50D.2callintrusionRequestinvoke(ciRequest.inv)operation.50D.3callintrusionRequestresult(ciRequest.res)operation.51D.4callintrusionGetCIPLinvoke(ciGetCIPL.inv)operation.52D.5callIntrusionGetCIPLresult(ciGetCIPL.res)operation.53D.6callIntrusionCompletedinvoke(ciCompleted.inv)operation.54D.7Callintrusionnotifications.55D.8Callintrusionerrors.56D.9callInterruptionRequestinvoke(cpiRequest.inv)operation.59D.10callProtectionRequestinvoke(cpipRequest.inv)operation.60D.11Callpriorityinterruptionnotifications.61AnnexE(informative):Bibliography.62History.63SIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)6IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyECMAonbehalfofitsmembersandthoseoftheEuropeanTelecommunicationsStandardsInstitute(ETSI).ThepresentdocumentisoneofaseriesofStandardsdefiningservicesandsignallingprotocolsapplicabletoPrivateIntegratedServicesNetworks(PISNs).TheseriesusesISDNconceptsasdevelopedbyITU-TandconformstotheframeworkofInternationalStandardsforOpenSystemsInterconnectionasdefinedbyISO/IEC.ThepresentdocumentspecifiesthefunctionalprofileforinterconnectingPrivateIntegratedservicesNetworkeXchanges(PINX)inAirTrafficServices(ATS)PISNstopermitinteroperabilitybetweenequipmentfromdifferentvendors.Itresultsfromamandate(M/239)fromtheCommissionoftheEuropeanCommunity(CEC)forstandardizationinthefieldofairtrafficmanagementequipmentandsystems.NationaltranspositiondatesDateofadoptionofthisEN:27July2001DateoflatestannouncementofthisEN(doa):31October2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30April2002DateofwithdrawalofanyconflictingNationalStandard(dow):30April2002SIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)71ScopeThepresentdocumentspecifiesthecombinationofbasestandards,togetherwiththeselectionofappropriateoptionsandparametervalues,necessarytospecifyhowQSIG/PSS1canbeusedtoprovidedigitalsignallingcapabilitiesbetweenPrivateIntegratedservicesNetworkseXchange(PINX)inanAirTrafficServices(ATS)PISN.Thepresentdocumentdefines:-physicalandelectricalcharacteristics(physicallayer)oftheinterfacestothetransmissionsystemstobeemployed;-datalinklayerprocedurestoensureerror-freecommunicationslinks;-networklayerproceduresforcallestablishmentandclearing;and-supplementaryservicestomeetspecificATSrequirements.ThepresentdocumentstatesrequirementsuponimplementationsinordertoachieveinteroperabilitybetweenequipmentinATSPISNs.NOTE1:Implementationofthepresentdocumentdoesnotprecludeamanufacturerfromofferingothermeansofinterconnection.ThepresentdocumentdoesnotspecifyrequirementsrelatedtointerworkingbetweenQSIGandothersignallingsystemsusedinATSPISNs.2ConformanceAsystemconformstothepresentdocumentifitcorrectlyperformsallthemandatorycapabilitiesdefinedintheRequirementList(RL)(annexA)andtheprofilespecificImplementationConformanceStatement(ICS)(annexB).Notethatmorecapabilitiesmaybemandatorythaninthebasestandards.3ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublicationand/oreditionnumberorversionnumber)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.ETSIEN300172:"PrivateIntegratedServicesNetwork(PISN);Inter-exchangesignallingprotocol;Circuit-modebasicservices[ISO/IEC11572(1996)modified]".ETSIETS300239(1995):"PrivateIntegratedServicesNetwork(PISN);Inter-exchangesignallingprotocol;Genericfunctionalprotocolforthesupportofsupplementaryservices[ISO/IEC11582(1995),modified]".ETSIETS300290(1994):"BusinessTeleCommunications(BTC);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Terminalequipmentinterface".ETSIETS300290,Amendment1(1995):"BusinessTeleCommunications(BTC);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Terminalequipmentinterface".ETSIETS300402-2(1995):"IntegratedServicesDigitalNetwork(ISDN);DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Datalinklayer;Part2:Generalprotocolspecification[ITU-TRecommendationQ.921(1993),modified]".SIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)8ETSIEN300402-4(V1.2.3):"IntegratedServicesDigitalNetwork(ISDN);DigitalSubscriberSignallingSystemNo.one(DSS1)protocol;Datalinklayer;Part4:ProtocolImplementationConformanceStatement(PICS)proformaspecificationforthegeneralprotocol".ETSIEN300426:"PrivateIntegratedServicesNetwork(PISN);Inter-exchangesignallingprotocol;Callintrusionsupplementaryservice[ISO/IEC14846(1996),modified]".ETSIETS300475-1:"PrivateTelecommunicationNetwork(PTN);Referenceconfiguration;Part1:ReferenceconfigurationforPTNeXchanges(PTNX)[ISO/IEC11579-1(1994),modified]".ETSIEN301039:"PrivateIntegratedServicesNetwork(PISN);Mappingfunctionsfortheemploymentof64kbit/scircuitmodeconnectionswith16kbit/ssub-multiplexing".ETSIEN301048:"PrivateIntegratedServicesNetwork(PISN);Inter-exchangesignallingprotocol;Transitcounteradditionalnetworkfeature[ISO/IEC15056(1997)modified]".ETSIEN301656:"PrivateIntegratedServicesNetwork(PISN);Inter-exchangesignallingprotocol;Callpriorityinterruptionandcallpriorityinterruptionprotectionsupplementaryservices;[ISO/IEC15992(1998),modified]".ISO/IEC9646-7(1994):"Informationtechnology-OpenSystemsInterconnection-Conformancetestingmethodologyandframework-Part7:ImplementationConformanceStatements".ITU-TRecommendationG.728(1992):"Codingofspeechat16kbit/susinglow-delaycodeexcitedlinearprediction".ITU-TRecommendationT.50(1992):"Informationtechnology-7-bitcodedcharactersetforinformationinterchange".ITU-TRecommendationZ.100(1993):"Specificationanddescriptionlanguage(SDL)".4Definitions4.1ExternaldefinitionsForthepurposesofthepresentdocument,thetermsanddefinitionsgiveninthefollowingapply:Creferencepoint:(ETS300475-1)DestinationPINX:(ETS300239)EndPINX:(ETS300239)GatewayPINX:(EN300172)IncomingCall:(EN300172)Inter-PINXConnection:(EN301039)Inter-PINXLink:(EN301039)Mappingfunctionalgroup:(ETS300475-1)OriginatingPINX:(EN300172)OutgoingCall:(EN300172)PrecedingPINX:(ETS300239)PrivateIntegratedServicesNetwork(PISN):(ETS300475-1)PrivateIntegratedServicesNetworkExchange(PINX):(ETS300475-1)Qreferencepoint:(ETS300475-1)Side,IncomingSideandOutgoingSide:(EN300172)SIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)9SourcePINX:(ETS300239)Sreferencepoint:(ETS300475-1)SubsequentPINX:(ETS300239)TerminatingPINX:(EN300172)TransitPINX:(EN300172)5AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:ACSEAssociationControlServiceElementAISAlarmIndicationSignalANFAdditionalNetworkFeatureAPDUApplicationProtocolDataUnitASN.1AbstractSyntaxNotationOneATSAirTrafficServicesCCCallControlCICLCallIntrusionCapabilityLevelCIPLCallIntrusionProtectionLevelCPICLCallPriorityInterruptionCapabilityLevelCPIPLCallPriorityInterruptionProtectionLevelDSEDialogueServiceElementGFTGenericFunctionalTransportHLCHighLayerCompatibilityiirrelevantICSImplementationConformanceStatementIPCCInter-PINXConnectionControlLD-CELPLowDelayCodeExcitedLinearPredictionLLCLowLayerCompatibilitymmandatoryMPMaPpingn/anotapplicableNFENetworkFacilitiesExtensionooptionalo.ioptional,qualifiedPINXPrivateIntegratedservicesNetworkeXchangePISNPrivateIntegratedServicesNetworkPSS1PrivateSignallingSystemno.1PTSPrivateTerminationSystemQSIGQreferencepointSIGnallingsystemRLRequirementsListROSERemoteOperationsServiceElementSCASimultaneousCallAttemptSCMSignallingCarriageMechanismSS-CISupplementaryServiceCallIntrusionSS-CPISupplementaryServiceCallPriorityInterruptionSS-CPIPSupplementaryServiceCallPriorityInterruptionProtectionSWSWitchingTETerminalEquipmentTEITerminalEndpointIdentifierxeXcludedSIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)106Specificationframework6.1GeneralTheapproachtakeninthepresentdocumentistodefinethedetaileddigitalsignallingfunctionswithintheframeworkoffunctionalgroupingsdefinedinthereferenceconfigurationforPISNeXchanges(ETS300475-1).Thisapproachabstractsthespecificationofthefunctionsfromanyrealizationasarealpieceofequipment.Atthesametimeitprovidesacompletemodelofahypotheticalsystemthatcaneasilybetranslatedtoaphysicalimplementation.NOTE2:Theuseofsuchaframeworkfordescribingtherequiredfunctionsneednotconstrainsolutionsforprovidingthefunctionsnorisitintendedtoimplyanyparticulardesignarchitecture.Itsimplyprovidesaconvenientmethodofspecifyingtherequiredfunctionsand,lateron,theteststoconfirmthatsuchfunctionsaresupportedbyaparticularpieceofequipment.ThemajorPINXfunctionsandtheirrelationshipsareillustratedinfigure1;thefunctionsaredescribedinthefollowingclauses.MPSWTEPINXPTSCQCCSFigure1:MajorPINXfunctionsThemodelinfigure1,andthefunctionalitydefinedbyit,representsasingleinstanceofaserviceinvocation(i.e.acall).APINXclaimingconformancewiththepresentdocumentshallbecapableofprovidingmultiplesimultaneousinstancesofthedefinedfunctions.6.2TerminalEquipment(TE)TheTEfunctionprovidesthenecessarymeansforahumanuser,byactionsattheHumanMachineInterface,toinitiateoutgoingcallstoorrespondtoincomingcallsfromanotherTEfunction.TheTEfunctionmaybesimple(e.g.asimpletelephonehandset)orcomplex(e.g.anATSControllerWorkingPosition).Thedetailedrequirementsofthisfunctionareoutsidethescopeofthepresentdocument.6.3PrivateTerminationSystem(PTS)ThePTSfunctionprovidestransmissionandsignallingcapabilitiesbetweentheTEfunctionandtheSWfunction.ThePTSfunction,ifnecessary,adaptsthephysical,electricalandproceduralconditionsoftheinterfaceusedtoattachaTEtothePINX,totheinternalconditionsofthePINX.Thedetailedrequirementsofthisfunctionareoutsidethescopeofthepresentdocument.SIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)116.4Switching(SW)TheSWfunctionprovidesthecapabilitytoswitchuserinformationandsignallinginformation.UserinformationisswitchedbetweenthePTSfunctionandtheMPfunction.Selectionoftheswitchingpathdependsupontheparametersoftheservicerequest.Signallinginformationisswitchedbetween:-thePTSfunctionandtheCCfunction;and-betweentheCCfunctionandtheMPfunction.NOTE3:Theswitchingfunctionmayalsoswitchbothuserandsignallinginformationbetweenthedescribedfunctionsandotherfunctionsoutsidethescopeofthepresentdocument.Thedetailedrequirementsofthisfunctionarespecifiedinclause8.6.5Mapping(MP)TheMPfunctionprovidesadaptationoftheinternalconditionsofthePINXtothephysical,electrical,andproceduralconditionsoftheinterfaceusedtoattachthePINXtoanexternaltransmissionfacility(e.g.aleasedcircuit)forinter-PINXcommunications.TheMPfunctionalsoprovidesthemultiplexingfunctionsrequiredtoseparateormergetheuserinformationandsignallinginformationfromthePINXtothetransmissionfacilityemployed.Thedetailedrequirementsofthisfunctionarespecifiedinclause9.6.6CallControl(CC)TheCCfunctionprovidesthefunctionsnecessarytocontrolcallsbetweenTEfunctionsattachedtotheATSPISN.ItincorporatesallthecomponentsofthePSS1(QSIG)protocolmodel(i.e.ProtocolControl,CallControl,GFT-Control,theCoordinationfunction,andapplicableSS-Controlentities)describedinEN300172andETS300239.NOTE4:TheCCfunctionalsoprovidesthefunctionsnecessarytocontrolcallsbetweenTEfunctionsattachedtotheATSPISNandothersubscribers(e.g.connectedtothepublictelecommunicationsnetwork).Itcanalsoprovidesignallinginterworkingfunctionswhennecessary.However,theseaspectsareoutsidethescopeofthepresentdocument.NOTE5:Inthepresentdocument,requirementsapplicabletotheCCfunctionarespecifiedseparatelyforeachofthefollowingcases:-OutgoingandIncomingsidesofaATSQSIGCall(EndPINXcase);and-InterworkingbetweenanIncomingsideandanOutgoingside(TransitPINXcase).Thedetailedrequirementsofthisfunctionarespecifiedinclauses10and11.SIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)127PhysicalinterfaceandprotocolstackattheCreferencepointFigure1alsoshows,usingverticaldashedlines,the"referencepoints"atwhichphysicalinterfacesmayoccur.ThepresentdocumentdefinestherequiredbehaviourataphysicalinterfaceattheCreferencepoint.Figure2showstheprotocolstackapplicableattheCreferencepoint.PISNUserPlane(Userinformation)PISNControlPlane(Signalling)DataVoicePISNCallControlandSupplementaryServicesNetworklayerPSS1(QSIG)ProtocolControlEN300172,ETS300239DatalinklayerSymmetricLAP-DETS300402-2(annexZA)PhysicalLD-CELPITU-TRec.G.728layer64kbit/ssub-multiplexed(4x16kbit/s)ETS300290,EN301039PhysicalTransmissionMediumFigure2:Protocolstack8Switching(SW)functions8.1SpeechcompressionFor16kbit/sspeechcallsinwhichthePINXactsasthe"EndPINX",theSWfunctionshallprovideaspeechcompressionanddecompressioncapability(CELPcodec)accordingtotherequirementsofITU-TRecommendationG.728.OutgoingspeechinformationfromthePINXshallbecompressedusingtheencodingalgorithmspecifiedinITU-TRecommendationG.728.SpeechinformationincomingtothePINXshallbedecompressedusingthedecodingalgorithmspecifiedinITU-TRecommendationG.728.NOTE6:TheCELPcodecdescribedinITU-TRecommendationG.728containsselectableoptionstopermitoperationwithmodemorothernon-speechsignals.SuchoperationisnotanticipatedintheATScontext.Thebit-stealingmethod,asspecifiedinITU-TRecommendationG.728/clause3.11,shallbeusedforsynchronizingtheLD-CELPbitstream.Thestolenbitsshallbeanalternatingsequenceofzerosandones(i.e.either010101…or101010…).ForcallsinwhichthePINXactsasa"TransitPINX",speechinformationshallnotbedecompressedandre-compressed.SIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)139Mapping(MP)functions9.1PhysicallayerfunctionsNOTE7:Thephysicalinterfaceandsub-multiplexingtechniquesspecifiedin9.1.1havebeenselectedasappropriateforATSPISNs.Theinclusionofotherphysicalinterfaces(e.g.at2048kbit/s)inafutureeditionofthepresentdocumentisnotprecluded.Oneconsequenceofthisisthatthenumberofchannelsandtheirattributes(e.g.informationtransferrate,userinformationlayer1protocol)attheQreferencepointmaybedifferentfromthatpresentlyspecified.SuchachangeimplieschangestotherequirementstobemetbytheMappingfunctionandtheCallControlfunction.Afurtherconsequenceisthat,whentheinter-PINXconnectionisprovidedbymeansofaleasedcircuit,establishmentoftheconnectionisachievedthroughanadministrativeprocedurewiththeleasedcircuitprovider.Functionsforthecontroloftheconnection(i.e.theIPCCfunctionalgroup,asspecifiedinETS300475-1)areneededonlywhenon-demandconnections(e.g.throughthepublicISDN)areusedastheinter-PINXconnection.Suppliersshouldbeawareofthesepossibilitiesandmaywishtodesigntheirsolutionsaccordingly.9.1.1PhysicalandelectricalinterfacerequirementsTheMPfunctionshallmeettherequirementsforphysicalandelectricalcharacteristicsspecifiedinETS300290anditsamendment.9.1.2Rateadaptationandsub-multiplexingTheMPfunctionshallmeettherequirementsspecifiedinEN301039forsub-multiplexinga64kbit/scircuit-modeinter-PINXconnectioninto4x16kbit/schannels.TheMPfunctionshallprovidearateadaptationcapability.Incomingspeechinformationshallbeadaptedtotheinternalchannelrate.Outgoingspeechinformationshallbeadaptedfromtheinternalchannelratetotheraterequiredbytheexternaltransmissionfacility,asspecifiedinEN301039.9.1.3AlarmIndicationSignal(AIS)IftheMPfunctionreceivesmultipleoctets(i.e.>3octets)containinganallone'sbitpatternfromtheexternaltransmissionfacilityitshallassumethistobeanAlarmIndicationSignal(AIS).TheMPfunctionshallassumethetransmissionfacilityand/orthepeerPINXisoutofserviceandtakeappropriatemanagementaction.TheMPfunctionshallbecapableofsendingAIStowardstheexternaltransmissionfacilitywhenitdetectslossofbitviolationsinthereceivedbitstream.OnresumptionofnormalbitviolationstheMPfunctionshallstopsendingAIS.NOTE8:Theremaybeother,implementationdependant,circumstanceswhentheMPfunctionisrequiredtosendAIS.Theseareoutsidethescopeofthepresentdocument.9.1.4SynchronizationSynchronizationfunctionsoftheMPfunctionshallbecompatiblewiththesynchronizationstrategyofthePINX.Thatistosay,theMPfunctionshallbecapableofboth(butnotsimultaneously):-extractingthetimingreceivedatthereceivesideofthephysicalinterfaceanddeliveringitasanexternalclocksourcefortheentiresystem,andsynchronizingtheMPfunction'sownoutputtimingtothissource;and-synchronizingtheMPfunction'sownoutputtimingtoanotherclocksourcenotderivedfromthephysicalinterfaceassociatedwiththisMPfunction.Selectionoftheoptionshallbebysystemconfigurationandruntimedetermination.SIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)149.2Datalinklayerfunctions9.2.1GeneralproceduresTheMPfunctionshallsupportdatalinklayerproceduresasspecifiedinannexZAofETS300402-2,withmodificationsasspecifiedinthefollowingclauses.NOTE9:Inclause9,referencesoftheform:(clausex.x.x)refertoclausesinETS300402-2.Referencesoftheform(seex.x.x)refertothepresentdocument.APINXshallprovideamanagementmeansofconfiguringtheMPfunctionforeachinter-PINXlinktobeeitherthe"master"sideorthe"slave"side(clauseZA.2.3.2).ThedesignationofanyparticularMPfunctionaseithera"master"ora"slave"shallnotbeinfluencedbynorshallitinfluencetheconfigurationofanyotherMPfunctioninthesamePINX.ThereisnoneedforaPINXtosupporttheunacknowledgedmodeofoperation(clauseZA.4.2).Whennolayer3informationistobetransmitted,thetransmittingdatalinklayerentityshallcontinuouslysendflagsequencesintheD-channel(clauseZA.1.2).NOTE10:Thisrequirementpermitsthereceivingdatalinkentitytoperformoctetsynchronizationfunctions(see9.3)withoutimpactonthetransmittingentity.Thetransmittingdatalinklayerentityshallalwayssendanopeningflagandaclosingflagforeachlayer2frametransmitted(i.e.theclosingflagofoneframeshallnotserveastheopeningflagofthenextframe)(clauseZA.1.2).NOTE11:Thisrequirementpermitsthereceivingdatalinkentitytoperformoctetsynchronizationfunctionswithoutimpactonthetransmittingentity.9.2.2SystemparametersThedefaultvaluesshallapplyforallsystemparameters(clauseZA.4.9),asspecifiedintable1.APINXshouldprovideameansforconfiguringparametersindividuallyforeachinter-PINXlink.Table1:Layer2parametervaluesParameterDescriptionValueDefaultvalue?KMaximumnumberofoutstandingI-frames3YesT200Frametransmissiontimer(minimumtimebetweenframes)1sYesT201Minimumtimebetweenre-transmissionofTEIidentitycheckmessagesNotusedNotusedT202Minimumtimebetweenre-transmissionofTEIidentityrequestmessagesNotusedNotusedT203Maximumtimebetweenframes10sYesN200Maximumnumberofre-transmissions3YesN201Maximumnumberofoctetsinaninformationfield260YesN202MaximumnumberoftransmissionsofTEIidentitycheckmessagesNotusedNotusedSIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)159.3OctetsynchronizationprocedureTheMPfunctionshallprovideanoctetsynchronizationproceduretopermitrecoveryfromslipsinthe64kbit/sbitstream.NOTE12:Suchaprocedureisrequiredforaninterimperiodduringwhichsome64kbit/sleasedcircuitsmaybeunabletoguaranteeoctetintegrity.Itshallbepossibletoenableanddisabletheprocedureonanyinter-PINXlinkbymeansofmanagementactions.Whentheoctetsynchronizationprocedureisenabledforaparticularinter-PINXlink,theMPfunctionshallcontinuouslymonitorthelinkandcorrectforlossofoctetsynchronization.10CallControl(CC)functions-EndPINXcase10.1BasiccallestablishmentandclearingTherequirementsofEN300172shallapply,withmodificationsasspecifiedinthefollowingclauses.NOTE13:Clauses10.2to10.4specifyaspectsofQSIGthatdonotneedtobesupportedbyaPINX.Clauses10.5andonwardsspecifyrequirementsadditionaltothoseinEN300172.Theheadingsusedinclauses10.5onwardscorrespondtoheadingtitlesinEN300172.NOTE14:Inclause10,referencesoftheform:(clausex.x.x)refertoclausesinEN300172.Referencesoftheform(seex.x.x)refertothepresentdocument.10.2Messagesegmentationandre-assemblyAnnexZA(Messagesegmentationandre-assembly)ofEN300172shallnotapply.10.3STATUSENQUIRYprocedureAPINXshallnotsupportinitiationoftheSTATUSENQUIRYprocedure(clause9.3.1).NOTE15:Thismeansthattheoptionsinvariouserrorcases(e.g.whereamessageisreceivedwithamessagetypeormessagesequenceerror(clause9.2.4),orduringdatalinkreset(clause9.2.8)orfailure(clause9.2.9))ofEN300172thatpermitanentitytosendaSTATUSENQUIRYmessageshallnotbesupported.10.4Overlapsending/receivingproceduresAPINX(IncomingSide)neednotsupporttheOverlapReceivingstate(clause7.1.14).SimilarlyaPINXactingasaTransitPINXneednotsupporttheTCC_AwaitAdditionalDigitsstate(clause10.4.3).APINX(OutgoingSide)shallnotinitiatecallsusingstatesandproceduresforoverlapsending.10.5CallrequestandtransmissionoftheSETUPmessageCallrequest(clause10.1.1)andtransmissionoftheSETUPmessage(clause10.5.1)shallbemodifiedaccordingtotherequirementsinthefollowingparagraphs.If,duetocongestion,noB-channelisavailablefortherequestedcall,andifpreviouslyrequested(e.g.bytheTEfunctionduetoClassofServiceorPriorityKeydepression),CallControlshallimmediatelyperformthe"execution"functionoftheCallpriorityinterruptionsupplementaryservice(see10.21.4).Ifnorequestforcallpriorityinterruptionwasmade,CallControlshallinitiatecallestablishmentonanalternativeroute(see10.15).SIST EN 301 846 V1.1.1:2005
ETSIETSIEN301846V1.1.1(2001-07)16If,duetoareasonotherthancongestion,noB-channelisavailable,CallControlshallinitiatecallestablishmentonanalternativeroute(see10.15).TheBearercapabilityinformationelementsentintheSETUPmessageshallbeencoded(see10.17.2)toindicate"Speech16kbit/s"or"Unrestricteddigitalinformation16kbit/s",asappropriate.TheCalledpartynumberinformationsentintheSETUPmessageshallbecomplete.ThetransmittedSETUPmessageshallalwayscontaintheSendingcompleteinformationelement.WithintheCallingpartynumberandCalledpartynumberinformationelements
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