SIST EN 300 686 V1.2.1:2004

Access and Terminals (AT); 34 Mbit/s and 140 Mbit/s digital leased lines (D34U, D34S, D140U, D140S); Network interface presentation

Revision to improve safety related text following a liaison from TC Safety. Specification of the public network interface and test methods for compliance.

Dostop in terminali (AT) - Digitalni zakupljeni vodi za prenosni hitrosti 34 Mbit/s in 140 Mbit/s (D34U, D34S, D140U, D140S) - Omrežni vmesnik

General Information

• Status: Published
• Publication Date: 30-Sep-2004
• ICS: 33.040.50 - Lines, connections and circuits
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Oct-2004
• Due Date: 01-Oct-2004
• Completion Date: 01-Oct-2004
• Mandate: T-297
• Ref Project: ETSI EN 300 686 V1.2.1 (2001-07) - Access and Terminals (AT); 34 Mbit/s and 140 Mbit/s digital leased lines (D34U, D34S, D140U, D140S); Network interface presentation

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Dostop in terminali (AT) - Digitalni zakupljeni vodi za prenosni hitrosti 34 Mbit/s in 140 Mbit/s (D34U, D34S, D140U, D140S) - Omrežni vmesnikAccess and Terminals (AT); 34 Mbit/s and 140 Mbit/s digital leased lines (D34U, D34S, D140U, D140S); Network interface presentation33.040.50Vodi, zveze in tokokrogiLines, connections and circuitsICS:Ta slovenski standard je istoveten z:EN 300 686 Version 1.2.1SIST EN 300 686 V1.2.1:2004en01-oktober-2004SIST EN 300 686 V1.2.1:2004SLOVENSKI
STANDARD



SIST EN 300 686 V1.2.1:2004



ETSIEN300686V1.2.1(2001-07)EuropeanStandard(Telecommunicationsseries)AccessandTerminals(AT);34Mbit/sand140Mbit/sdigitalleasedlines(D34U,D34S,D140U,D140S);NetworkinterfacepresentationSIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)2ReferenceREN/AT-020008Keywordsinterface,leasedline,networkETSI650RoutedesLuciolesF-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.©EuropeanTelecommunicationsStandardsInstitute2001.Allrightsreserved.SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)3ContentsIntellectualPropertyRights.5Foreword.5Introduction.61Scope.72References.73Definitionsandabbreviations.83.1Definitions.83.2Abbreviations.84Requirements.94.1Mechanicalcharacteristics.94.2Electricalcharacteristics-34Mbit/s.104.2.1Outputport.104.2.1.1Signalcodingattheoutputport.104.2.1.2Waveformshape.104.2.1.3Outputtimingunderfailureconditions.114.2.1.4Outputreturnloss.114.2.1.5Outputtimingandjitter.114.2.2Inputport.124.2.2.1Signalcodingattheinputport.124.2.2.2Inputreturnloss.124.2.2.3Inputlosstolerance.124.2.2.4Immunityagainstreflections.124.2.2.5Inputtimingandjittertolerance.124.3Electricalcharacteristics-140Mbit/s.134.3.1Outputport.134.3.1.1Signalcodingattheoutputport.134.3.1.2Waveformshape.134.3.1.3Outputtimingunderfailureconditions.154.3.1.4Outputreturnloss.154.3.1.5Outputtimingandjitter.164.3.2Inputport.164.3.2.1Signalcodingattheinputport.164.3.2.2Inputreturnloss.164.3.2.3Inputlosstolerance.164.3.2.4Inputtimingandjittertolerance.164.4Safety.164.5Overvoltage.164.6ElectroMagneticCompatibility(EMC).17AnnexA(normative):Testmethods.18A.1General.18A.1.1Additionalinformationtosupportthetest.18A.1.2Equipmentconnection.18A.2Testmethods.19A.2.1Signalcodingattheoutputport.19A.2.1.1Signalcodingattheoutputport-34Mbit/s.19A.2.1.2Signalcodingattheoutputport-140Mbit/s.20A.2.2Waveformshapeattheoutputport.20A.2.2.1Waveformshapeattheoutputport-34Mbit/s.20A.2.2.2Waveformshapeattheoutputport-140Mbit/s.21A.2.3Outputtimingunderfailureconditions.22A.2.4Inputsignalcoding,losstoleranceandimmunityagainstreflections.23SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)4A.2.4.1Inputsignalcoding,losstoleranceandimmunityagainstreflections-34Mbit/s.23A.2.4.2Inputsignalcodingandlosstolerance-140Mbit/s.24A.2.5Inputreturnloss.25A.2.6Outputreturnloss.26AnnexB(normative):DefinitionofHDB3code.27B.1General.27B.2Definition.27AnnexC(normative):DefinitionofCMIcode.28C.1General.28C.2Definition.28AnnexD(informative):Bibliography.29History.30SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)5IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.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)hasbeenproducedbyETSITechnicalCommitteeAccessandTerminals(AT).ThepresentdocumentresultedfromamandatefromtheCommissionoftheEuropeanCommunity(CEC)toprovidestandardsforthesupportoftheDirectiveonOpenNetworkProvision(ONP)ofleasedlines(92/44/EEC).Therearefourotherstandardsdirectlyrelatedtothepresentdocument:-EN300687:"AccessandTerminals(AT);34Mbit/sdigitalleasedlines(D34UandD34S);Connectioncharacteristics";-EN300688:"AccessandTerminals(AT);140Mbit/sdigitalleasedlines(D140UandD140S);Connectioncharacteristics";-EN300689:"AccessandTerminals(AT);34Mbit/sdigitalleasedlines(D34UandD34S);Terminalequipmentinterface";-EN300690:"AccessandTerminals(AT);140Mbit/sdigitalleasedlines(D140UandD140S);Terminalequipmentinterface".ThepresentdocumentisbasedoninformationfromITU-TRecommendationsandETSIpublicationsandtherelevantdocumentsarequotedwhereappropriate.NationaltranspositiondatesDateofadoptionofthisEN:29June2001DateoflatestannouncementofthisEN(doa):30September2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31March2002DateofwithdrawalofanyconflictingNationalStandard(dow):31March2002SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)6IntroductionTheCouncilDirectiveontheapplicationofOpenNetworkProvision(ONP)toleasedlines(92/44/EEC)(seeannexD)concernstheharmonizationofconditionsforopenandefficientaccessto,anduseof,theleasedlinesprovidedoverpublictelecommunicationsnetworks,andtheavailabilitythroughouttheEuropeanUnionofaminimumsetofleasedlineswithharmonizedtechnicalcharacteristics.The34Mbit/sand140Mbit/sunstructuredandstructuredleasedlinesarenotpartoftheminimumsetofleasedlinesundertheleasedlineDirective,howeverthesestandardsarebeingwrittenwiththeintentionthatwhere34Mbit/sor140Mbit/sleasedlinesareoffered,theywillbeinaccordancewiththeseharmonizedstandards.UndertheDirective91/263/EEC(seeannexD),laterreplacedby98/13/EC(seeannexD),terminalequipmentforconnectiontotheseleasedlineswasrequiredtofulfilcertainessentialrequirements.Thepresentversionofthepresentdocumenthasbeenproducedtointroducesomenecessarychanges.ETS300166(seeannexD)andITU-TRecommendationG.703[4]wereusedasthebasisfortheinterfacepresentationrequirements.SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)71ScopeThepresentdocumentspecifiesthetechnicalrequirementsandconformancetestsforthenetworkinterfacepresentationsof34Mbit/sand140Mbit/sdigitalleasedlines.Thisincludes:-the34Mbit/sDigitalUnstructuredleasedlineoperatingat34368kbit/s;-the140Mbit/sDigitalUnstructuredleasedlineoperatingat139264kbit/s;-the34Mbit/sdigitalstructuredleasedlineoperatingat34368kbit/sforthesupportofanunstructured33920kbit/sinformationtransferrate;-the140Mbit/sdigitalstructuredleasedlineoperatingat139264kbit/sforthesupportofanunstructured138240kbit/sinformationtransferrate.AconnectionispresentedviainterfacesatNetworkTerminationPoints(NTPs).Thepresentdocumentdefinesthenetworkinterfaceaspresentedbytheleasedlineproviderandshouldbeusedinconjunctionwiththeappropriatecompanionstandard,EN300687[6](34Mbit/s)orEN300688[7](140Mbit/s),whichspecifiestheconnectioncharacteristicsbetweenNTPsoftheleasedline.Thepresentdocumentandtheappropriateconnectioncharacteristicsstandardtogetherdescribethetechnicalcharacteristicsoftherelevantleasedline.Thepresentdocumentisapplicabletoleasedlines,includingparttimeleasedlines,whoseestablishmentorreleasedoesnotrequireanyprotocolexchangeorotherinterventionattheNTP.Thepresentdocumentcoversthemechanicalandelectricalcharacteristics(exceptsafety,overvoltageandEMCaspects)ofthenetworkinterfaceandspecifiestheconformancetestsforequipmentofthekindthatprovidestheinterfacepresentation.Someofthetestsdescribedinthepresentdocumentarenotdesignedtobeappliedtotheinterfaceofaninstalledleasedline;suchtestsmaybeappliedtoequipmentofthekindusedtoprovidetheinterface.Thepresentdocumentdoesnotincludedetailsconcerningtheimplementationofthetestsnordoesitincludeinformationonanyregulationsconcerningtesting.Thereisnorequirementforeachleasedlinetobetestedinaccordancewiththepresentdocumentbeforeitisbroughtintoserviceorreturnedintoservicefollowingrepair.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]IEC60169-8(1978):"Radiofrequencyconnectors-Part8:R.Fcoaxialconnectorswithinnerdiametersofouterconductor6,5mm(0,256in)withbayonetlock-Characteristicimpedance50ohms(TypeBNC)".[2]IEC60169-13(1976):"Radiofrequencyconnectors-Part13:R.F.coaxialconnectorswithinnerdiameterofouterconductor5,6mm(0,22in)-Characteristicimpedance75ohms(Type1,6/5,6)-Characteristicimpedance50ohms(Type1,8/5,6)withsimilarmatingdimensions".[3]ISO/IEC10173(1998):"Informationtechnology-Telecommunicationsandinformationexchangebetweensystems-InterfaceconnectorandcontactassignmentsforISDNprimaryrateaccessconnectorlocatedatreferencepointsSandT".[4]ITU-TRecommendationG.703(1998):"Physical/electricalcharacteristicsofhierarchicaldigitalinterfaces".SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)8[5]ITU-TRecommendationO.151(1992):"Errorperformancemeasuringequipmentoperatingattheprimaryrateandabove".[6]ETSIEN300687:"AccessandTerminals(AT);34Mbit/sdigitalleasedlines(D34UandD34S);Connectioncharacteristics".[7]ETSIEN300688:"AccessandTerminals(AT);140Mbit/sdigitalleasedlines(D140UandD140S);Connectioncharacteristics".[8]ETSIEN300689:"AccessandTerminals(AT);34Mbit/sdigitalleasedlines(D34UandD34S);Terminalequipmentinterface".[9]ETSIEN300690:"AccessandTerminals(AT);140Mbit/sdigitalleasedlines(D140UandD140S);Terminalequipmentinterface".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:leasedlines:telecommunicationsfacilitiesprovidedbyapublictelecommunicationsnetworkthatprovidedefinedtransmissioncharacteristicsbetweennetworkterminationpointsandthatdonotincludeswitchingfunctionsthattheusercancontrol,(e.g.on-demandswitching)NetworkTerminationPoint(NTP):allphysicalconnectionsandtheirtechnicalaccessspecificationswhichformpartofthepublictelecommunicationsnetworkandarenecessaryforaccesstoandefficientcommunicationthroughthatpublicnetworkPRBS(223-1):PseudoRandomBitSequence(PRBS)(asdefinedinclause2.2ofITU-TRecommendationO.151[5])3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:acalternatingcurrentAMIAlternateMarkInversionBNCBayonetNutConnectorCMICodedMarkInversionD140S140Mbit/sDigitalStructuredleasedlineD140U140Mbit/sDigitalUnstructuredleasedlineD34S34Mbit/sDigitalStructuredleasedlineD34U34Mbit/sDigitalUnstructuredleasedlinedcdirectcurrentEMCElectroMagneticCompatibilityHDB3HighDensityBipolarcode3NTPNetworkTerminationPointONPOpenNetworkProvisionppmpartspermillionPRBSPseudoRandomBitSequenceRXRXisasignalinput(ateithertheleasedlineinterfaceorthetestequipment,seefigure1)TXTXisasignaloutput(ateithertheleasedlineinterfaceorthetestequipment,seefigure1)SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)94RequirementsTheserequirementsdefinethenetworkinterfacepresentationfor:-the34Mbit/sDigitalUnstructuredleasedline(D34U)whichprovidesabi-directionalpoint-to-pointdigitaltransmissioncapabilitywithausablebitrateof34368kbit/s-nostructuringofthedataisprovided,orshallberequired,bythenetworkandanystructuringistheresponsibilityoftheuser;-the140Mbit/sDigitalUnstructuredleasedline(D140U)whichprovidesabi-directionalpoint-to-pointdigitaltransmissioncapabilitywithausablebitrateof139264kbit/s-nostructuringofthedataisprovided,orshallberequired,bythenetworkandanystructuringistheresponsibilityoftheuser;-the34Mbit/sDigitalStructuredleasedline(D34S)whichprovidesabi-directionalpoint-to-pointdigitaltransmissioncapabilityforthesupportofanunstructured33920kbit/sinformationtransferrate;theframestructureinthe34368kbit/sbitstreamisdefinedinEN300687[6]-anystructuringofthedatawithinthetransparent33920kbit/spartoftheframeistheresponsibilityoftheuser;-the140Mbit/sDigitalStructuredleasedline(D140S)whichprovidesabi-directionalpoint-to-pointdigitaltransmissioncapabilityforthesupportofanunstructured138240kbit/sinformationtransferrate;theframestructureinthe139264kbit/sbitstreamisdefinedinEN300688[7]-anystructuringofthedatawithinthetransparent138240kbit/spartoftheframeistheresponsibilityoftheuser.Theprovisionoftimingistheresponsibilityoftheuser,howeverincertaininstallations,theleasedlineprovidermaybeabletoofferaservicewhichissynchronizedtothenetwork.NOTE1:Thenetworkinterfaceisnotdesignedforpowerfeedingcapabilities.NOTE2:Ifequipmentprovidingtheinterfacerequiresamainssupply,theleasedlineprovidershouldbringthistotheattentionoftheusersothattheusercanprovidemainssupplyback-upfacilities,ifrequired.Themechanicalcharacteristics,safety,overvoltageprotectionrequirementsandElectroMagneticCompatibility(EMC)requirementsarecommonforthe34Mbit/sand140Mbit/sleasedlines.Theelectricalcharacteristicsaredifferentandaredefinedinseparateclauses.4.1MechanicalcharacteristicsRequirement:Thenetworkinterfaceshallprovidetwocoaxial75Ωsockets,oneeachfortransmitandreceive,thesesocketsbeingeither:a)75Ωsockets(type1,6/5,6)complyingwithIEC60169-13[2];orb)75ΩBNCsocketscomplyingwiththegeneralrequirementsofIEC60169-8[1]withthematingdimensionsspecifiedinannexBofISO/IEC10173[3].Theouterconductorofthecoaxialpairshallbeconnectedtosignalgroundbothattheinputportandattheoutputport.NOTE1:WhenconnectingtheterminalequipmenttotheNetworkTerminationPoint(NTP),anydifferenceingroundpotentialbetweenthetwoequipmentsmayproduceavoltageacrossthesignalgroundconnectionandmaycausedamage.SeeEN50310(seeannexD)fordetailsofearthingrequirementswithinthecustomer'spremises.NOTE2:Thetransmitpairistheoutputfromthenetworkinterface.Thereceivepairistheinputtothenetworkinterface,asshowninfigure1.Wheretheterms"output"and"input"areusedwithoutqualificationinthepresentdocument,theyrefertothenetworkinterface.SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)10TXRXRXTXTERMINALEQUIPMENTINTERFACENETWORKINTERFACEOUTPUTINPUTINPUTOUTPUTFigure1Test:Thereshallbeavisualinspectionthatthesocketsareofthecorrecttype.4.2Electricalcharacteristics-34Mbit/s4.2.1Outputport4.2.1.1SignalcodingattheoutputportRequirement:ThesignaltransmittedattheoutputportshallcomplywiththeHighDensityBipolarcode3(HDB3)encodingrules(seeannexB).Test:ThetestshallbeconductedaccordingtoclauseA.2.1.1.4.2.1.2WaveformshapeRequirement:Thepulseattheoutputportshallcomplywiththerequirementsgiveninfigure2andtable1,basedonITU-TRecommendationG.703[4].Test:ThetestshallbeconductedaccordingtoclauseA.2.2.1.Table1:WaveformshapeatoutputportPulseshape(nominallyrectangular)Allmarksofavalidsignalshallconformtothemask(seefigure2).ThevalueVcorrespondstothenominalpeakvoltageofamark.Testloadimpedance75Ωnon-reactiveNominalpeakvoltageVofamark1,0VPeakvoltageofaspace0±0,1VNominalpulsewidth14,55nsRatiooftheamplitudesofpositiveandnegativepulsesatthecentreofthepulseinterval0,95to1,05Ratioofthewidthsofpositiveandnegativepulsesatthenominalhalfamplitude0,95to1,05SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)1117ns(14,55+2,45)8,65ns(14,55-5,90)14,55ns12,1ns(14,55-2,45)V1,00,50Nominalpulse29,1ns(14,55+14,55)0,20,10,10,20,20,10,10,10,124,5(14,55+9,95)Figure2:Pulsemaskfor34Mbit/spulse4.2.1.3OutputtimingunderfailureconditionsRequirement:Whenthereisafailurewithinthenetworkandifasignalispresentedatthenetworkinterfaceoutput,theoutputtimingshallbe34368kbit/s±20ppm.Test:ThetestshallbeconductedaccordingtoclauseA.2.3.4.2.1.4OutputreturnlossRequirement:Theoutputreturnlossatthenetworkinterface,withrespectto75Ω,shallbegreaterthanorequaltothevaluesgivenintable2,whichisbasedonannex3ofETS300166(seeannexD).Table2:OutputportminimumreturnlossFrequencyrangeReturnloss860kHzto1720kHz1720kHzto51550kHz6dB8dBTest:ThetestshallbeconductedaccordingtoclauseA.2.6.4.2.1.5OutputtimingandjitterNOTE:OutputtimingrequirementsandjitterlimitsfortheD34UandD34SleasedlinesarespecifiedintheconnectionstandardEN300687[6].SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)124.2.2Inputport4.2.2.1SignalcodingattheinputportRequirement:TheinputportshalldecodeHighDensityBipolarcode3(HDB3)encodedsignalswithouterrorinaccordancewithHDB3encodingrules(seeannexB).Test:ThetestshallbeconductedaccordingtoclauseA.2.4.1.4.2.2.2InputreturnlossRequirement:Theinputreturnlossatthenetworkinterface,withrespectto75Ω,shallbegreaterthanorequaltothevaluesgivenintable3,whichistakenfromclause8.3.3ofITU-TRecommendationG.703[4].Table3:InputportminimumreturnlossFrequencyrangeReturnloss860kHzto1720kHz1720kHzto34368kHz34368kHzto51550kHz12dB18dB14dBTest:ThetestshallbeconductedaccordingtoclauseA.2.5.4.2.2.3InputlosstoleranceRequirement:Theinputportshallcorrectlydecodewithouterrorsa34368kbit/ssignalasdefinedin4.2.1.1and4.2.1.2abovebutmodifiedbyacableorartificialcablewiththefollowingcharacteristics:a)attenuationthatfollowsa√flawwithvaluesthroughouttherange0dBto12dBat17184kHz;andb)characteristicimpedanceof75Ωwithatoleranceof±20%overthefrequencyrange860kHzto51550kHz.Test:ThetestshallbeconductedaccordingtoclauseA.2.4.1.4.2.2.4ImmunityagainstreflectionsRequirement:Whenasignalcomprisingacombinationofanormalsignalandaninterferingsignalisappliedtotheinputport,viaanartificialcablewithalossintherange0dBto12dBat17184kHz,noerrorsshallresultduetotheinterferingsignal.ThenormalsignalshallbeasignalencodedaccordingtoHDB3,shapedaccordingtothemaskoffigure2,withabinarycontentinaccordancewithaPRBS(223-1).Theinterferingsignalshallbethesameasthenormalsignalexceptthatthelevelshallbeattenuatedby20dB,thebitrateshallbewithin34368kbit/s±20ppmandthetimingshallnotbesynchronizedtothenormalsignal.Test:ThetestshallbeconductedaccordingtoclauseA.2.4.1.4.2.2.5InputtimingandjittertoleranceNOTE:InputtimingrequirementsandjittertolerancefortheD34UandD34SleasedlinesarespecifiedintheconnectionstandardEN300687[6].SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)134.3Electricalcharacteristics-140Mbit/s4.3.1Outputport4.3.1.1SignalcodingattheoutputportRequirement:ThesignaltransmittedattheoutputportshallcomplywiththeCodedMarkInversion(CMI)encodingrules(seeannexC).Test:ThetestshallbeconductedaccordingtoclauseA.2.1.2.4.3.1.2WaveformshapeRequirement:Thepulseattheoutputportshallcomplywiththerequirementsgiveninfigures3and4andtable4,basedonITU-TRecommendationG.703[4].Table4:WaveformshapeatoutputportPulseshapeNominallyrectangularandconformingwiththemasksshowninfigures3and4Testloadimpedance75Ωnon-reactivePeaktopeakvoltage1,0±0,1VRisetimebetween10%and90%amplitudesofthemeasuredsteadystateamplitude≤2nsTransitiontimingtolerance(referredtothemeanvalueofthe50%amplitudepointsofthenegativetransition)Negativetransitions:±0,1nsPositivetransitionsatunitintervalboundaries:±0,5nsPositivetransitionsatmid-interval:±0,35nsSIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)14NOTE1:Themaximum"steadystate"amplitudeshallnotexceedthe0,55Vlimit.Overshootsandothertransientsarepermittedtofallintothedottedarea,boundedbytheamplitudelevels0,55Vand0,60V,providedtheydonotexceedthesteadystatelevelbymorethan0,05V.NOTE2:Therisetimeanddecaytimeshallbemeasuredbetween-0,4Vand0,4Vandshallnotexceed2ns.Figure3:Maskofapulsecorrespondingtoabinary0SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)15NOTE1:Themaximum"steadystate"amplitudeshallnotexceedthe0,55Vlimit.Overshootsandothertransientsarepermittedtofallintothedottedarea,boundedbytheamplitudelevels0,55Vand0,60V,providedtheydonotexceedthesteadystatelevelbymorethan0,05V.NOTE2:Theinversepulseshallhavethesamecharacteristics,notingthatthetimingtoleranceatthelevelofthenegativeandpositivetransitionsare±0,1nsand±0,5nsrespectively.NOTE3:Therisetimeanddecaytimeshallbemeasuredbetween-0,4Vand0,4Vandshallnotexceed2ns.Figure4:Maskofapulsecorrespondingtoabinary1Test:ThetestshallbeconductedaccordingtoclauseA.2.2.2.4.3.1.3OutputtimingunderfailureconditionsRequirement:Whenthereisafailurewithinthenetworkandifasignalispresentedatthenetworkinterfaceoutput,theoutputtimingshallbe139264kbit/s±15ppm.Test:ThetestshallbeconductedaccordingtoclauseA.2.3.4.3.1.4OutputreturnlossRequirement:Theoutputreturnlossatthenetworkinterface,withrespectto75Ω,shallbegreaterthanorequaltothevaluesgivenintable5,whichistakenfromclause9.2ofITU-TRecommendationG.703[4].Table5:OutputportminimumreturnlossFrequencyrangeReturnloss7MHzto210MHz15dBTest:ThetestshallbeconductedaccordingtoclauseA.2.6.SIST EN 300 686 V1.2.1:2004



ETSIETSIEN300686V1.2.1(2001-07)164.3.1.5OutputtimingandjitterNOTE:OutputtimingrequirementsandjitterlimitsfortheD140UandD140SleasedlinesarespecifiedintheconnectionstandardEN300688[7].4.3.2Inputport4.3.2.1SignalcodingattheinputportRequirement:TheinputportshalldecodeCMIencodedsignalswithouterrorinaccordancewithCMIencodingrules(seeannexC).Test:ThetestshallbeconductedaccordingtoclauseA.2.4.2.4.3.2.2InputreturnlossRequirement:Theinputreturnlossatthenetworkinterface,withrespectto75Ω,shallbegreaterthanorequaltothevaluesgivenintable6,whichistakenfromclause9.3ofITU-TRecommendationG.703[4].Table6:InputportminimumreturnlossFrequencyrangeReturnloss7MHzto210MHz15dBTest:ThetestshallbeconductedaccordingtoclauseA.2.5.4.3.2.3InputlosstoleranceRequirement:Theinputportshallcorrectlydecodewithouterrorsa139264kbit/ssignalasdefinedin4.3.1.1and4.3.1.2abovebutmodifiedbyacableorartificialcablewiththefollowingcharacteristics:a)attenuationthatfollowsa√flawwithvaluesthroughouttherange0dBto12dBat70MHz;andb)characteristicimpedanceof75Ωwithatoleranceof±20%overthefrequencyrangefrom7MHzto210MHz.Test:ThetestshallbeconductedaccordingtoclauseA.2.4.2.4.3.2.4InputtimingandjittertoleranceNOTE:InputtimingrequirementsandjittertolerancefortheD140UandD140SleasedlinesarespecifiedintheconnectionstandardEN300688[7].4.4SafetyRequirementsforsafetyareoutsidethescopeofthepresentdocument.SafetystandardsarepublishedbyCENELEC.NOTE1:AnexampleofsuchaCENELECproductsafetystandardisEN60950(seeannexD).
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