ETSI EN 300 011-1 V1.2.2 (2000-05)

Integrated Services Digital Network (ISDN); Primary rate User Network Interface (UNI); Part 1: Layer 1 specification

REN/TM-06017-2

Digitalno omrežje z integriranimi storitvami (ISDN) – Primarni vmesnik uporabnik-omrežje (UNI) – 1. del: Specifikacija prve plasti

General Information

• Status: Published
• Publication Date: 23-May-2000
• Technical Committee: TM 6 - TM Access Networks
• Current Stage: 12 - Completion
• Due Date: 24-Apr-2000
• Completion Date: 24-May-2000
• Ref Project: SIST EN 300 011-1 V1.2.2:2003 - Integrated Services Digital Network (ISDN); Primary rate User Network Interface (UNI); Part 1: Layer 1 specification

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digitalno omrežje z integriranimi storitvami (ISDN) – Primarni
vmesnik uporabnik-omrežje (UNI) – 1. del: Specifikacija prve plastiIntegrated Services Digital Network (ISDN); Primary rate User Network Interface (UNI); Part 1: Layer 1 specification33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 300 011-1 Version 1.2.2SIST EN 300 011-1 V1.2.2:2003en01-december-2003SIST EN 300 011-1 V1.2.2:2003SLOVENSKI
STANDARD
ETSIEN300011-1V1.2.2(2000-05)EuropeanStandard(Telecommunicationsseries)IntegratedServicesDigitalNetwork(ISDN);PrimaryrateUserNetworkInterface(UNI);Part1:Layer1specificationSIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)2ReferenceREN/TM-06017-2KeywordsISDN,layer1,primary,rate,transmission,UNIETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°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:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)3ContentsIntellectualPropertyRights.6Foreword.61Scope.72References.73Definitions,symbolsandabbreviations.83.1Definitions.83.2Symbols.103.3Abbreviations.104Typeofconfiguration.114.1Point-to-point.114.2Locationofinterface.114.3Interfacewiring.114.4Interfaceconnector.115Functionalcharacteristics.125.1Summaryoffunctions(layer1).125.2Interchangecircuits.135.3Activation/deactivation.135.4Definitionofprimitives.155.5Framestructure.155.5.1Numberofbitspertimeslot.155.5.2Numberoftimeslotsperframe.155.5.3Assignmentsofbitsintimeslot0.165.5.4DescriptionoftheCRC-4procedureinbit1oftheframe.165.5.4.1Allocationofbit1to8oftheframeforacompletemultiframe.165.5.4.2Sub-Multiframe(SMF).165.5.4.3Useofbit1in2048kbit/sCRC-4multiframe.175.5.5CyclicRedundancyCheck(CRC).175.5.5.1Multiplication/divisionprocess.175.5.5.2Encodingprocedure.175.5.5.3Decodingprocedure.175.6Bitsequenceindependence.175.7Linecode.175.8Timingconsiderations.186Interfaceprocedure.186.1Definitionofsignalsattheinterface.186.2Definitionsofstatetablesatnetworkandusersides.196.3Layer1statesontheusersideoftheinterface.206.4Layer1statesatthenetworksideoftheinterface.216.5Statetables.226.6Allocationoftimeslots.246.7Interframe(layer2)timefill.256.8FramealignmentandCRC-4procedures.256.8.1Lossandrecoveryofbasicframealignment.256.8.1.1Lossofbasicframealignment.256.8.1.2Strategyforbasicframealignmentrecovery.256.8.2CRCmultiframealignmentusinginformationinbit1ofthebasicframe.256.8.3CRCbitmonitoring.266.8.3.1Monitoringprocedure.266.8.3.2Monitoringforfalsebasicframealignment.266.8.3.3ErrorperformancemonitoringusingCRC-4.277Maintenanceattheinterface.277.1Definitionsofmaintenancesignals.27SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)47.2UseofCRCprocedure.277.2.1Introduction.277.2.2LocalizationoftheCRCfunctionsfromtheuserpointofview.287.2.2.1NoCRCprocessinginthetransmissionlink.287.2.2.2CRCprocessinginthedigitaltransmissionlink.287.3Maintenancefunctions.287.3.1Generalrequirements.287.3.2Maintenancefunctionsontheuserside.297.3.2.1Anomaliesanddefectdetection.297.3.2.2Detectionofdefectindicationsignals.297.3.2.3Consequentactions.297.3.3Maintenancefunctionsonthenetworkside.307.3.3.1Defectdetection.307.3.3.2Detectionofdefectindicationsignals.307.3.3.3Consequentactions.308Electricalcharacteristics.318.1Typeofinterface.318.2Specificationsattheoutputports.318.2.1Bitrate.318.2.2Waveformshape.328.2.3Returnlossattheoutputport.338.2.4Impedancetowardsgroundoftheoutputport.338.3Specificationattheinputports.338.3.1Receiversensitivity.338.3.2Returnlossattheinputport.338.3.3Inputportimmunityagainstreflections.338.3.4Tolerablelongitudinalvoltage.348.3.5Impedancetowardsgroundoftheinputport.348.4Jitter.348.4.1Generalconsiderations.348.4.2MinimumtolerancetojitterandwanderatTEinputs.358.4.2.1TolerableinputjitterwhenconnectedatT,SorS/Treferencepoint.358.4.2.2Tolerableinputjitterwhenconnectedtoleasedlines.368.4.3TEandNT2outputjitteratinterfaceIA.368.4.3.1TEandNT2withonlyoneUNI.368.4.3.2TEandNT2withmorethanoneUNItothesamepublicISDN.378.4.3.3TEandNT2designedforinterconnectionvialeasedlines.378.4.4MinimumtolerancetojitterandwanderatNTinputs.378.4.4.1TolerableinputjitteratTreferencepoint.378.4.4.2Tolerableinputjitteratleasedlinesinput.389Powerfeeding.389.1Provisionofpower.389.2PoweravailableattheNT.399.3Feedingvoltage.399.4Protectionrequirements.39AnnexA(normative):ApplicationofthepresentdocumenttotheSreferencepoint.40A.1Scope.40A.2Requirements.40A.2.1Timingconsiderations.40A.2.2Jitter,generalconsiderations.40A.2.3FramealignmentandCRC-4procedures.40SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)5A.3Interfacewiring.41A.4LoopbacksrequiredatSreferencepoint.41AnnexB(normative):Characteristicsofloopbacks.42B.1Introduction.42B.2Characteristicsofloopbackatthenetworkside.42B.3Characteristicsofloopbacksforprimaryratecustomerinstallations.42AnnexC(informative):Overviewoftechnicalchangestoedition1.43Bibliography.44History.45SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)6IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinSR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinSR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSITechnicalCommitteeTransmissionandMultiplexing(TM).ThepresentdocumentaimstomeeturgentrequirementsofnetworkoperatorsandequipmentmanufacturerswhoaredesigningequipmenttooperatewithanIntegratedServicesDigitalNetwork(ISDN)primaryrateaccessUserNetworkInterface(UNI).ThepresentdocumentisbaseduponITU-TRecommendationI.431[14]andprovidesmodificationsandfurtherrequirementstothatdocument.ItalsoisaffectedbyITU-TRecommendationsG.703[15],G.704[16]andG.706[17],andmodificationstotheseITU-TRecommendationsareprovidedwithinthepresentdocument.ThepresentdocumentalsotakesintoaccountrequirementscontainedinECMA104[13]:"Physicallayerattheprimaryrateaccessinterfacebetweendataprocessingequipmentandprivateswitchingnetworks(1985)",whicharegiveninannexA.Thepresentdocumentconsistsof3partsasfollows:Part1:"Layer1specification";Part2:"ConformancetestspecificationforinterfaceIAandIB";Part3:"ImplementationConformanceStatement(ICS)andImplementationeXtraInformationforTesting(IXIT)proformaspecificationforlnterfaceIAandIB".Thepresentdocumentincludeseditorialimprovementsofthesafetyrelatedclauses.NationaltranspositiondatesDateoflatestannouncementofthisEN(doa):31August2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):29February2001DateofwithdrawalofanyconflictingNationalStandard(dow):29February2001SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)71ScopeThepresentdocumentspecifiesrequirementsandtestprinciplesfortheISDN2048kbit/sprimaryrateUNIincludingthephysical,electricalandfunctionalcharacteristicsandtheinformationexchangewithhigherlayers.Compliancewiththepresentdocumentensuresthat,withregardtolayer1interfaceaspects,equipmentforusewithISDNprimaryrateaccessisportablewithincountriesthatadheretothepresentdocumentand,furthermore,thatinterworkingwithhigherlayerprotocolsforISDNissupported.ThepresentdocumentisapplicabletoequipmenthavinginterfaceIAorIBfortheconnectiontotheISDNprimaryrateUNIintendedtobeinstalledoncustomers'premises.InaccordancewithITU-TRecommendationI.411[1],thepresentdocumentistobeappliedtointerfacesatreferencepointsS,TandS/T(coincidentSandT)oftheISDNreferenceconfiguration.ThepresentdocumentisapplicableforISDNchannelarrangementsasdefinedinITU-TRecommendationI.412[2],asfarastheprimaryrateat2048kbit/sisconcerned.AnnexAspecifiesadditionalrequirementsforinterfacesatreferencepointS.Thepresentdocumentdoesnotspecify:-safetyrequirements;-interfaceorequipmentovervoltageprotectionrequirements;-immunityrequirementsagainstelectromagneticinterferences;-emissionlimitationrequirements.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[1]ITU-TRecommendationI.411(1993):"ISDNuser-networkinterfaces-Referenceconfigurations".[2]ITU-TRecommendationI.412(1988):"ISDNuser-networkinterfaces-Interfacestructuresandaccesscapabilities".[3]ITU-TRecommendationO.151(1992):"Errorperformancemeasuringequipmentoperatingattheprimaryrateandabove".[4]EN60603-7(1993):"Connectorsforfrequenciesbelow3MHzforusewithprintedboards-Part7:Detailspecificationforconnectors,8-way,includingfixedandfreeconnectorswithcommonmatingfeatures".[5]ITU-TRecommendationO.162(1992):"Equipmenttoperformin-servicemonitoringon2048,8448,34368and139264kbit/ssignals".[6]ITU-TRecommendationM.20(1992):"Maintenancephilosophyfortelecommunicationnetworks".[7]ETSIETR001:"IntegratedServicesDigitalNetwork(ISDN);Customeraccessmaintenance".SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)8[8]ETSIETS300166(1993):"TransmissionandMultiplexing(TM);Physicalandelectricalcharacteristicsofhierarchicaldigitalinterfacesforequipmentusingthe2048kbit/s-basedplesiochronousorsynchronousdigitalhierarchies".[9]ETSIETS300233(1994):"IntegratedServicesDigitalNetwork(ISDN);AccessdigitalsectionforISDNprimaryrate".[10]ETSIETS300247(1995):"BusinessTelecommunications(BT);OpenNetworkProvision(ONP)technicalrequirements;2048kbit/sdigitalunstructuredleasedline(D2048U)Connectioncharacteristics".[11]ETSIETS300419(1995):"BusinessTeleCommunications(BTC);2048kbit/sdigitalstructuredleasedlines(D2048S);Connectioncharacteristics".[12]CCITTRecommendationX.200(1994):"Informationtechnology-OpenSystemsInterconnection-Basicreferencemodel:Thebasicmodel".[13]ECMA104:"PhysicalLayeratthePrimaryRateAccessInterfacebetweenDataProcessingEquipmentandPrivateSwitchingNetworks".[14]ITU-TRecommendationI.431(1993):"Primaryrateuser-networkinterface-Layer1specification".[15]ITU-TRecommendationG.703(1991):"Physical/electricalcharacteristicsofhierarchicalinterfaces".[16]ITU-TRecommendationG.704(1995):"Synchronousframestructuresusedat1544,6312,2048,8488and44736kbit/shierarchicallevels".[17]ITU-TRecommendationG.706(1991):"Framealignmentandcyclicredundancycheck(CRC)proceduresrelatingtobasicframestructuresdefinedinRecommendationG.704".[18]CCITTRecommendationG.811(1988):"Timingrequirementsattheoutputsofprimaryreferenceclockssuitableforplesiochronousoperationofinternationaldigitallinks".[19]ITU-TRecommendationG.823(1993):"Thecontrolofjitterandwanderwithindigitalnetworkswhicharebasedonthe2048kbit/shierarchy".[20]CCITTRecommendationI.604(1988):"ApplicationofmaintenanceprinciplestoISDNprimaryrateaccesses".[21]ITU-TRecommendationO.9(1999):"Measuringarrangementstoassessthedegreeofunbalanceaboutearth".[22]CCITTRecommendationO.171(1992):"Timingjittermeasuringequipmentfordigitalsystems".3Definitions,symbolsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingdefinitionsapply:AlternateMarkInversion(AMI):isacodewhereONEsarerepresentedbyalternatepositiveandnegativepulses,andZEROsbyspaces.High-DensityBipolar3(HDB3):isamodifiedAMIcode.Anexceptionoccursforblocksof4successiveZEROs.Eachblockof4successiveZEROsisreplacedbyOOOVorBOOVwhereBrepresentsaninsertedpulseconformingtotheAMIandVrepresentsanAMIviolation.ThechoiceofOOOVorBOOVismadesothatthenumberofBpulsesbetweenconsecutiveVpulsesisodd.Inotherwords,successiveVpulsesareofalternatepolaritysothatnodirectcurrent(dc)componentisintroduced.SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)9interfaceIA:usersideoftheISDNUNIfortheprimaryrateaccess.interfaceIB:networksideoftheISDNUNIfortheprimaryrateaccess.networkside:NT1,LTandETfunctionalgroupsincaseofaninterfaceattheTreferencepoint;orrelevantpartsoftheNT2functionalgroupincaseofaninterfaceattheSreferencepoint.networkoption1:thedigitallinkbetweeninterfaceattheTandVreferencepointdoesnotprovideaCRC-4processing,i.e.theCRC-4isterminatedintheTEandtheET.Thisdigitallinkiscalledtobe"withoutCRCprocessing"(seesubclause7.2.2.2).NOTE1:ThisoptionisnotprovidedbythepublicISDNattheTreferencepoint.HoweveritmightbeusedforPrivateTelecommunicationsNetworkExchange(PTNX)interconnectionusingunstructured2048kbit/sleasedlines.networkoption2:thedigitallinkbetweeninterfaceattheTandVreferencepointprovidesCRC-4processingintheNT1andtheETaccordingETR001[7].ThereforethecombinationsofCRC-4errorinformationandRemoteAlarmIndication(RAI)indicatethefaultcondition;FC1orFC4(seesubclause7.2.2.1).NOTE2:Option3ofCCITTRecommendationI.604[20]withCRC-4processinginNT1,LTandETisnotrelevantforthepresentdocument.NetworkTermination(NT):anequipmentprovidinginterfaceIB.NOTE3:Thistermisusedinthepresentdocumenttoindicatenetwork-terminatingaspectsofNT1andNT2functionalgroupswherethesehaveanIBinterface.NetworkTerminationType1(NT1):thisfunctionalgroupincludesfunctionsbroadlyequivalenttolayer1(physical)oftheOpenSystemInterconnection(OSI)referencemodel.Thesefunctionsareassociatedwiththeproperphysicalandelectromagneticterminationofthenetwork.NT1functionsare:-linetransmissiontermination;-layer1maintenancefunctionsandperformancemonitoring;-timing;-layer1multiplexing;-interfacetermination.NetworkTerminationType2(NT2):thisfunctionalgroupincludesfunctionsbroadlyequivalenttolayer1andhigherlayersoftheCCITTRecommendationX.200[12]referencemodel.PrivateTelecommunicationNetworkExchanges(PTNXs),localareanetworksandterminalcontrollersareexamplesofequipmentorcombinationsofequipmentthatprovideNT2functions.NT2functionsinclude:-layer2andlayer3protocolhandling;-layer2andlayer3multiplexing;-switching;-concentration;-maintenancefunctions;-interfaceterminationandotherlayer1functions.PrivateTelecommunicationNetworkExchange(PTNX):anodalidentityinaprivatetelecommunicationnetworkwhichprovidesautonomousandautomaticswitchingandcallhandlingfunctionsusedfortheprovisionoftelecommunicationserviceswhicharebasedonthedefinitionsforthoseofthepublicISDN.PrivateNetworkTermination(PNT):aremoteunitofequipmentwhichterminatesatransmissionsystememployedbetweenthePTNXandtheinterfaceIBandtheSreferencepoint.SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)10TerminalAdapter(TA):anequipmentwithinterfaceIAandoneormoreauxiliaryinterfacesthatallownon-ISDNterminalstobeservedbyanISDNUNI.TerminalEquipment(TE):anequipmentprovidinganinterfaceIA.NOTE4:Thistermisusedinthepresentdocumenttoindicateterminal-terminatinglayer1aspectsofTE1,TAandNT2functionalgroups,wherethesehaveanIAinterface.NOTE5:InannexA,thisdefinitionapplieswiththeexceptionthattheNT2functionalgroupingisnotcovered.TerminalEquipmentType1(TE1):thisfunctionalgroupincludesfunctionsbelongingtothefunctionalgroupTE,andwithaninterfacethatcomplieswiththeISDNUNIstandard.userside:terminalterminatinglayer1aspectsofTE1,TAandNT2functionalgroups.3.2SymbolsForthepurposesofthepresentdocument,thefollowingsymbolsapply:ONEbinary"1"ZERObinary"0"3.3AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:AISAlarmIndicationSignalAMIAlternateMarkInversionCRCCyclicRedundancyCheckdcdirectcurrentEMCElectroMagneticCompatibilityETExchangeTerminationFCFaultConditionHDB3High-DensityBipolar3(linecode)ISDNIntegratedServiceDigitalNetworkLOSLossOfSignalMPHManagement(entity)-PHysical(layer)[primitive]MPH-AIMPHActivateIndicationMPH-EIMPHErrorIndicationMTIEMaximumTimeIntervalErrorNOFNormalOperationalFramesNTNetworkTerminationPHPHysical(layer)PH-AIPH-ActivateIndicationPH-DIPH-DeactivateIndicationPNTPrivateNetworkTerminationPRBSPseudo-RandomBinarySequencePTNPrivateTelecommunicationsNetworkPTNXPrivateTelecommunicationsNetworkExchangeRAIRemoteAlarmIndicationSMFSub-MultiFrameTATerminalAdapterTETerminalEquipmentUNIUserNetworkInterfaceSIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)114TypeofconfigurationThetypeofconfigurationappliesonlytothelayer1characteristicsoftheinterfaceanddoesnotimplyanyconstraintsonmodesofoperationathigherlayers.4.1Point-to-pointTheprimaryrateshallsupportonlythepoint-to-pointconfiguration.Point-to-pointconfigurationatlayer1impliesthatforeachdirectiononlyonesource(transmitter)andonesink(receiver)areconnectedtotheinterface.Themaximumreachoftheinterfaceinthepoint-to-pointconfigurationislimitedbyspecificationfortheelectricalcharacteristicsoftransmittedandreceivedpulsesandthetypeofinterconnectingcable.4.2LocationofinterfaceTheelectricalcharacteristicsapplytotheinterfacepointsIAandIBoffigure1.TENTIAIBNOTE:IAislocatedattheinputandoutputportsoftheTE.IBislocatedattheinputandoutputportsoftheNT.Figure1:Locationofinterfaces4.3InterfacewiringThemagnitudeofthecharacteristicimpedanceofsymmetricaltypeinterfacecableshallbe120Ω±20%inafrequencyrangefrom200kHzto1MHzand120Ω±10%at1MHz.Theuseofshieldedinterfacecablesmayberequiredtomeetradiationemissionandimmunityrequirements.ThereforetheTerminalEquipment(TE)andtheNetworkTermination(NT)shallhaveprovidedapointontheequipmentwhereashieldoftheinterfacecablecan,andifprovidedshallbeconnectedto.ThispointshallbedesignedrespectingEMCrequirementsprovidingaccesstothesignalreferenceforthetransmitterandreceiveroftheequipmentinterface.Applicationofinterfacecablewithindividuallyshieldedpairsorwithacommonshieldforbothpairsshallbepossible.4.4InterfaceconnectorTheinterfaceconnectorandcontactassignmentsisspecifiedinEN60603-7[4]andthecontactassignmentsintable1.HoweverpermanentwiringconnectionsfromTEtoNTarealsopermitted.SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)12Table1:contactassignmentsContactNetworkinterface1&2Transmitpair3Unused4&5Receivedpair6Unused7Unused8UnusedNOTE:Thetransmitpairistheoutputfromthenetworkinterface.Thereceivepairistheinputtothenetworkinterface5Functionalcharacteristics5.1Summaryoffunctions(layer1)TENTB-,H0-orH1-channels<--->B-,H0-orH1-channels1D-channel64kbit/s<--->1D-channel64kbit/sBittiming<--->BittimingOctettiming<--->OctettimingFramealignment<--->FramealignmentPowerfeeding<---->PowerfeedingMaintenance<--->MaintenanceCRCprocedure<--->CRCprocedureNOTE:Thispowerfeedingfunctionusesaseparatepairofwires.Figure2:FunctionalcharacteristicsB-channel:Thisfunctionshallprovideforthebi-directionaltransmissionofindependentB-channelsignalseachhavingabitrateof64kbit/s.AB-channelmaybeassignedtoanytimeslot,excepttimeslots0and16.D-channel:Thisfunctionshallprovideforthebi-directionaltransmissionofoneD-channelsignalatabitrateof64kbit/s.TheD-channelshallbeassignedtotimeslot16.H0-Channel:Thisfunctionshallprovideforthebi-directionaltransmissionofupto5independentH0signal,eachhavingabitrateof384kbit/s.AnH0-channelmaybeassignedtoany6timeslots,excepttimeslots0and16.H1-channel:Thisfunctionshallprovideforthebi-directionaltransmissionof1H1channelhavingabitrateof1920kbit/s.AnH1-channelshallbeassignedtotimeslots1to15and17to31.Bitriming:Thisfunctionshallprovidebit(signalelement)timingtoenabletheTEorNTtorecoverinformationfromtheaggregatebitstream.Octettiming:Thisfunctionshallprovide8kHztimingtowardsTEorNTforthepurposeofsupportinganoctetstructureforvoicecodersandforothertimingpurposesasrequired.Framealignment:ThisfunctionshallprovideinformationtoenabletheTEorNTtorecoverthetime-division-multiplexedchannels.Timeslot0shallprovidetheframealignmentinaccordancewithsubclause6.8.1.Powerfeeding:ThisfunctionshallprovideforthecapabilitytotransferpoweracrosstheinterfacetowardstheNT1.Maintenance:Thisfunctionshallprovideinformationconcerningoperationalorfailureconditionsoftheinterface.ThenetworkreferenceconfigurationformaintenanceactivitiesonprimaryratesubscriberaccessisgiveninETR001[7].CyclicRedundancyCheck(CRC)-4procedure:Thisfunctionshallprovidefortheprotectionagainstfalseframingandmayprovideforerrorperformancemonitoringoftheinterface.SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)135.2InterchangecircuitsTwointerchangecircuits,oneforeachdirection,shallbeusedforthetransmissionofdigitalsignals.Allthefunctionslistedabove,withtheexceptionofpowerfeedingandpossiblymaintenance,arecombinedintotwocompositedigitalsignals,oneforeachdirectionoftransmission.Ifpowerfeedingviatheinterfaceisprovided,anadditionalinterchangecircuitshallbeusedforpowerfeeding.Thetwowiresofthepairscarryingthedigitalsignalmaybereversed.5.3Activation/deactivationTheinterfacesfortheprimaryrateUNIshallbeactiveatalltimes.Noactivation/deactivationproceduresshallbeappliedattheinterface.However,forconsistencyinthelayermodelbetweenprimaryrateandbasicratethesamesetofprimitivesshallbeused.Theexchangeoftheseprimitivesandstatechangesareillustratedinfigure3.SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)14InformationtransfernotavailableInformationtransferavailablePH-DIPH-DATAPH-DATAPH-AIPH-DIPH-AIInformationtransfernotavailable,maintenanceMPH-AIMPH-EIMPH-LxARMPH-AIa)Layer1-Layer2b)Layer1-Management;Usersidec)Layer1-Management;NetworksidePH-ARInformationtransfernotavailableInformationtransferavailableMPH-DIMPH-AIMPH-AIMPH-DIMPH-EIInformationtransfernotavailableInformationtransferavailableMPH-DIMPH-AIMPH-DIMPH-EIMPH-DRrequestindicationNOTE:Allpossibletransitionsareshown;refertoETS300233[9]forfurtherinformationaboutmaintenanceprocedures.Figure3:ExchangeofprimitivesSIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)155.4DefinitionofprimitivesTheprimitivesgivenintable2shallbeusedbetweenlayers1and2andbetweenlayer1andthemanagemententity.Table2:PhysicallayerprimitivesSpecificnameParameterParameterdatacontentREQUESTINDICATIONPriorityindicatorParameterdataLayer1<->Layer2PH-DATAU/NU/NX(seenote2)XDL-PDUPH-ACTIVATEU/N(seenote3)U/N--PH-DEACTIVATE-U/N--Layer1<->ManagementMPH-ERROR-U/N-XTypeoferrorMPH-ACTIVATE-U/N--MPH-DEACTIVATEN(seenote4)U/N--MPH-LxACTIVATEN(seenote1)--XLoopbackindicatorU=Existsatuserside;N=Existsatnetworkside;X=Exists;-=DoesnotexistNOTE1:Thisisusedinassociationwithaccessdigitalsectionfunctionswithinthenetworkside;seeETS300233[9].NOTE2:Priorityindicatorappliesonlytotherequesttype.Thepriorityindicatorshallbeusedtogiveprioritytoinformationbelongingtopriorityclass1ifqueuesforDL-PDUsareimplementedatlayer1.NOTE3:Thisprimitiveisgivenforconsistencywithlayer2butnotusedinthelayer1interfacestatusproceduresbecausetheproceduresaredefinedforpermanentlayer1activation.NOTE4:Thisprimitiveistorequestaloopbackreleasewithinthenetworkside,whichwasinvokedbyanMPH-LxACTIVATE,refertoETS300233[9].5.5Framestructure5.5.1NumberofbitspertimeslotAtimeslotshallconsistofeightbits,numberedfrom1to8.5.5.2NumberoftimeslotsperframeAframeshallconsistofthirty-twotimeslots,numberedfrom0to31.Thenumberofbitsperframeis256andtheframerepetitionrateis8000frames/s.SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)165.5.3Assignmentsofbitsintimeslot0Bits1to8oftheframe(timeslot0)shallbeasshowntable3.Table3:Allocationofbits1to8oftheframeBitnumberAlternateframes12345678FramecontainingtheSi0011011framealignmentsignalFramealignmentsignalFramenotcontainingtheSi1ASa4Sa5Sa6Sa7Sa8framealignmentsignal(seenote1)(seenote2)(seenote3)(seenote4)NOTE1:SibitsareusedforCRC-4multiframe.NOTE2:ThisbitisfixedatONEtoassistinavoidingsimulationsoftheframealignmentsignal.NOTE3:A=RAI.Inundisturbedoperation,settoZERO;inalarmcondition(RAI),settoONE.NOTE4:BitsSa4toSa8shallbesettoONEbyTEs.Sa4andSa8arereservedforinternationalstandardizationSa5toSa7arereservedfornationaluse.TEsshallignoreanyreceivedpattern.5.5.4DescriptionoftheCRC-4procedureinbit1oftheframe5.5.4.1Allocationofbit1to8oftheframeforacompletemultiframeTheallocationofbits1to8oftheframeisshownintable4foracompleteCRC-4multiframe.Table4:CRC-4multiframestructureSub-multiframeFrameBits1to8oftheframe(SMF)number123456780C10011011101ASa4Sa5Sa6Sa47Sa82C200110111301ASa4Sa5Sa6Sa47Sa84C30011011511ASa4Sa5Sa6Sa47Sa86C40011011Multi-701ASa4Sa5Sa6Sa47Sa8frame8C10011011911ASa4Sa5Sa6Sa47Sa810C2001101121111ASa4Sa5Sa6Sa47Sa812C3001101113E1ASa4Sa5Sa6Sa47Sa814C4001101115E1ASa4Sa5Sa6Sa47Sa8NOTE1:E=CRC-4errorindicationbits(seesubclause5.5.4.3).SMF(block)witherror:E=ZERO,SMF(block)withouterror:E=ONE.NOTE2:Sa4toSa8=Sparebits(seenote4totable3).NOTE3:C1toC4=CRC-4bits(seesubclause5.5.5).NOTE4:A=RAI(seetable3).5.5.4.2Sub-Multiframe(SMF)EachCRC-4multiframe,whichiscomposedof16framesnumbered0to15,isdividedintotwo8-framesub-multiframes,designatedSMF1andSMF2,whichsignifiestheirrespectiveorderofoccurrencewithintheCRC-4multiframestructure.TheSMFistheCRC-4blocksize(i.e.2048bits).SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)175.5.4.3Useofbit1in2048kbit/sCRC-4multiframeInthoseframescontainingtheframealignmentsignal(definedinsubclause5.5.3)bit1isusedtotransmittheCRC-4bits.TherearefourCRC-4bits,designatedC1,C2,C3,andC4ineachSMF.Inthoseframesnotcontainingtheframealignmentsignal(seesubclause5.5.3),bit1isusedtotransmitthe6-bitCRC-4multiframealignmentsignalandtwoCRC-4errorindicationbits(E).TheCRCmultiframealignmentsignalhastheform"001011".TheEbitsshallbeusedtoindicatereceivederroredsub-multiframesbysettingthebinarystateofoneEbitfromONEtoZEROforeacherroredsub-multiframe.Anydelaybetweenthedetectionofanerroredsub-multiframeandthesettingoftheEbitthatindicatestheerrorstateshallbelessthan1second.TheEbitsshallalwaysbetakenintoaccounteveniftheSMF,whichcontainsthem,isfoundtobeerrored,sincethereislittlelikelihoodthattheEbitsthemselveswillbeerrored.5.5.5CyclicRedundancyCheck(CRC)5.5.5.1Multiplication/divisionprocessAparticularCRC-4word,locatedinsub-multiframeN,istheremainderaftermultiplicationbyx4andthendivision(modulo2)bythegeneratorpolynomialx4+x+1,ofthepolynomialrepresentationofsub-multiframeN-1.Whenrepresentingthecontentsofthecheckblockasapolynomial,thefirstbitintheblock,i.e.frame0,bit1orframe8,bit1,shallbetakenasbeingthemostsignificantbit.Similarly,C1isdefinedtobethemostsignificantbitoftheremainderandC4theleastsignificantbitoftheremainder.5.5.5.2Encodingprocedurea)theCRC-4bitsintheSMFarereplacedbyZEROs;b)theSMFisthenacteduponbythemultiplication/divisionprocessreferredtoinsubclause5.5.5.1;c)theremainderresultingfromthemultiplication/divisionprocessisstored,readyforinsertionintotherespectiveCRC-4locationsofthenextSMF.NOTE:TheCRC-4bitsthusgenerateddonotaffecttheresultofthemultiplication/divisionprocessinthenextSMFbecause,asindicatedina),theCRC-4bitpositionsinanSMFareinitiallysettoZEROduringthemultiplication/divisionprocess.5.5.5.3Decodingprocedurea)areceivedSMFisacteduponbythemultiplication/divisionprocessreferredtoinsubclause5.5.5.1,afterhavingitsCRC-4bitsextractedandreplacedbyZEROs;b)theremainderresultingfromthisdivisionprocessisthenstoredandsubsequentlycomparedonabit-by-bitbasiswiththeCRCbitsreceivedinthenextSMF;c)iftheremaindercalculatedinthedecoderexactlycorrespondstotheCRC-4bitsreceivedinthenextSMF,itisassumedthatthecheckedSMFiserrorfree.5.6BitsequenceindependenceInterfaceIBshallprovidebitsequenceindependenttransmissionintimeslots1to31.5.7LinecodeThelinecodeshallbeHigh-DensityBipolar3(HDB3).SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)185.8TimingconsiderationsTheNTshallderiveitstimingfromthenetworkclock.TheTEshallsynchronizeitstiming(bit,octet,framing)fromthesignalreceivedfromtheNTandshallsynchronizeaccordinglythetransmittedsignal.Inanunsynchronizedcondition(e.g.whentheaccessthatnormallyprovidesnetworktimingisunavailable)thefrequencydeviationofthefree-runningclockshallnotexceed±50ppm.AnyTE,whichprovidesmorethanoneinterface,isdeclaredtobeamultipleaccessTEandshallbecapableoftakingthesynchronizingclockfrequencyforitsinternalclockgeneratorfrommorethanoneaccess(orallaccesslinks)andsynchronizethetransmittedsignalsateachinterfaceaccordingly.ATE(PTNX),whichisdesignedtoactasasynchronizationmasterinaprivatenetworkapplication,shallhaveaclockaccuracybetterthan±32ppm.APrivateTelecommunicationsNetworkExchange(PTNX)withahighclockaccuracyclassofbetterthan±1ppmmaynotbeabletosynchronizeitsinternalclocktoaninputfrequencywithatoleranceof±32ppm.ThetimingnegotiationfunctionbeingspecifiedforprivatenetworksshallguaranteethatthePTNXwiththehigherclockaccuracyshallactasthemasterafterre-establishmentoftheconfiguration.ATE,whichisdesignedtobeconnectedtotheTreferencepointonlyoraTEwithafreerunningclockaccuracybetterthan±1ppm,shallbeabletosynchronizeatthenominalbitrate±1ppm.OtherTEsshallbeabletosynchronizeatthenominalbitrate±32ppm.Inordertolimittheimpactontheserviceperformancefollowingthelossofsynchronization,themaximumtimeforresynchronizationtothenetworkclockshallbelessthan30s,withthefrequencydeviationappliedtotheinputportlimitedto±1ppm.6Interfaceprocedure6.1DefinitionofsignalsattheinterfaceSignalsexchangedbetweenthenetworkandusersideundernormalandfaultconditionsarelistedintable5.Furtherinformationonthesesignalsisgiveninsubclause7.1.Thedetectionalgorithmforsignalsgivenintable5andothersisdefinedasfollows:-normaloperationalframes:thealgorithmshallbeinaccordancewithsubclauses6.8.1.2and6.8.2;-lossofframealignment:thealgorithmshallbeinaccordancewithsubclause6.8.1.1;-RAI:thisisdetectedwhenbothofthetwofollowingconditionsoccur:-framealignmentcondition;-receptionofonebitAsettoONE.-LossOfSignal(LOS):theequipmentshallassumelossofsignalwhentheincomingsignalamplitudeismorethan20dBbelowthenominaloutputamplitudeforthisinterfaceformorethan1ms;NOTE:Thedetectionofthiseventisnecessaryifanimplementationcannotdetectlossofframealignmentincaseoflossofincomingsignal.-AlarmIndicationSignal(AIS):thisisdetectedwhenbothofthetwofollowingconditionsoccur:-lossofframealignment;-receptionof512bitperiodscontaininglessthan3ZEROs(referenceismadetoITU-TRecommendationO.162[5],paragraph3.3.2).SIST EN 300 011-1 V1.2.2:2003

ETSIETSIEN300011-1V1.2.2(2000-05)19-CRCerrorinformation:receptionofoneEbitsettoZEROaccordingtotable5;-RAIandcontinuousCRCerrorinformation:thiseventisidentifiedwhenAbitsettoONEandEbitsettoZEROarecontinuouslyreceivedwithinapersistencechecktimeperiodofbetween10msand50ms;-nosignal:itistobeunderstoodthatthetermnosignalcharacterizesarangeoftransmittedsignallevelswhichdonotnecessarilyhaveazeropulseamplitudebutmaybeinterpretedbyareceiveraslossofsignal;-lossofpowerorreturnofpower:theseareequipmentinternaleventsanddonotrequirefurtherdefinitionofthedetectionmechanism.Table5:SignalsbetweenthenetworkandusersideundernormalandfaultconditionsNameListofthesignalsNormaloperationalframeOperationalframeswith:-ActiveassociatedCRCbits;-CRCerrorinformation(seesubclause5.5.4.3);-nodefectindication.RAIOperationalframewith:-ActiveassociatedCRCbits;-CRCerrorinformation(seenote);-withremotealarmindication,(seetable3).LOSNoreceivingincomingsignalAISContinuousstreamofONEs(ITU-TRecommendationM.20[6])CRCerrorinformationEbitaccordingtosubclausetable4,setto"ZERO"ifCRCblockisreceivedwitherror.NOTE:ContiguousCRCblockswitherrorsshallresultincontiguousCRCerrorinformation.6.2DefinitionsofstatetablesatnetworkandusersidesTheusersideandnetworksideoftheinterfacehavetoinformeachotheronthelayer1statesinrelationtothedifferentde
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