SIST EN 300 011-1 V1.2.2:2003

• Abstract:

  Maintenance work : update of safety provisions

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.080 - Integrated Services Digital Network (ISDN)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: 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

Overview

SIST EN 300 011-1 V1.2.2:2003 outlines the Layer 1 specification for the Primary Rate User Network Interface (UNI) in Integrated Services Digital Networks (ISDN). Developed by the Slovenski inštitut za standardizacijo (SIST), this standard is harmonized with EN 300 011-1 and based on relevant ITU-T Recommendations (such as I.431, G.703, G.704). The document is essential for manufacturers, network operators, and system integrators deploying or maintaining ISDN primary rate interfaces, particularly concerning the physical, electrical, and functional characteristics necessary to ensure compatibility, interoperability, and robust operation within ISDN frameworks.

Key Topics

• Layer 1 Specification: The standard defines the physical and electrical parameters for primary rate access (2048 kbit/s) to ISDN, including interface configurations, wiring, and connectors.
• Interface Types: Specifications for both IA (user side) and IB (network side) interfaces, identifying connection points in the ISDN reference configuration.
• Frame Structure and Timing: Rules for timeslot allocation (32 per frame, 8 bits each), frame alignment, cyclic redundancy check (CRC-4) procedures, octet and bit timing, and error detection mechanisms.
• Functional Requirements:
  • Bi-directional transfer of B-channels (64 kbit/s), D-channel (64 kbit/s), H0 (384 kbit/s), and H1 (1920 kbit/s) as appropriate.
  • Power feeding capability for network termination equipment.
  • Maintenance functions, including performance monitoring and support for operational/failure condition reporting.
• Wiring and Connectors: Uses connectors as specified by EN 60603-7; contact assignments facilitate the correct linking of transmit and receive pairs.
• Point-to-Point Configuration: Layer 1 supports only point-to-point connections, ensuring simplicity and reliability.
• Error Detection and Maintenance: CRC-4 based error checks, maintenance signaling, and procedures for the detection and reporting of interface anomalies.

Applications

• Equipment Design and Testing: Provides a blueprint for ISDN terminal equipment (TE) manufacturers and network termination (NT) device designers to ensure interoperability.
• Primary Rate Interface Deployment: Used in public and private ISDN deployments for voice and data, guaranteeing consistent communication between customer premises equipment and telecommunication networks.
• Network Maintenance: Supports network operators in performing diagnostics, monitoring interface status, and detecting transmission errors, ensuring ongoing service quality.
• International Compatibility: By adhering to this standard, organizations ensure their equipment can be used across various countries that implement the standardized primary rate ISDN interface.
• Customer Premises Installations: Guides system integrators and network planners in setting up and certifying ISDN primary rate access with appropriate wiring, connectors, and interface characteristics.

Related Standards

• EN 300 011-2: Conformance test specification for interface IA and IB.
• EN 300 011-3: Implementation conformance statement (ICS) for interface IA and IB.
• ITU-T I.431: Layer 1 specification for primary rate user-network interface.
• ITU-T G.703 & G.704: Physical and frame structure specifications for digital interfaces.
• EN 60603-7: Connector and contact assignment standard for interface wiring.
• ECMA-104: Additional requirements for S reference point application.
• ETSI ETS 300 233: Digital access maintenance procedures at primary rate.

Summary

SIST EN 300 011-1 V1.2.2:2003 is a vital ISDN standard detailing the primary rate UNI Layer 1 specifications needed for reliable communication and network compatibility. Following its provisions supports equipment interoperability, facilitates effective network maintenance, and ensures smooth integration of ISDN services at the primary access level. This standard is central to high-quality, standards-based ISDN deployments.

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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