SIST EN 300 452 V1.2.1:2004
(Main)Access and Terminals (AT); Special quality voice bandwidth 4-wire analogue leased line (A4S); Connection characteristics and network interface presentation
General Information
- Abstract
Specification of the public network side of the interface and the performance of the leased line service, including test procedures for compliance Revision of ETS 300 452 to improve the safety related text following a liaison from TC Safety.
- Status
- Published
- Publication Date
- 30-Sep-2004
- 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-147-2
Overview
SIST EN 300 452 V1.2.1:2004 is an international telecommunications standard that specifies requirements for the connection characteristics and network interface presentation of special quality voice bandwidth 4-wire analogue leased lines (A4S). Developed by the Slovenski inštitut za standardizacijo (SIST), this standard harmonizes the interface and performance criteria on the public network side for A4S leased line services. It establishes parameters and test procedures to ensure reliable, high-quality voice transmission over analogue leased lines, aligning with EU Directives on open network provision (ONP) and supporting seamless integration across diverse telecommunications infrastructures.
Key Topics
Connection Characteristics
- Defines bidirectional, symmetrical, point-to-point 4-wire connections suitable for high-quality voice bandwidth applications.
- Parameters include overall loss, frequency distortion, signal power, transmission delay, group delay distortion, circuit noise, impulsive noise, phase jitter, and harmonic distortion.
Network Interface Presentation
- Describes both physical and electrical characteristics for network termination points (NTPs), supporting either standardized 8-contact sockets (per ISO/IEC 8877) or hardwired options upon request.
- Specifies contact assignments to separate transmit and receive pairs, ensuring clear signal routing.
Test Principles and Compliance
- Outlines principles for testing interface compliance, focusing on physical, mechanical, and electrical characteristics.
- Provides methods for measuring attenuation, distortion, noise, delay, and return loss, supporting consistent service quality.
Scope of Application
- Applies to leased lines as part of the EU-mandated minimum set for open network provision, wherever the establishment or release of the line does not require protocol exchange or intervention at the NTP.
- Excludes in-service, real-time monitoring by the provider; tests are primarily suited for pre-service validation.
Applications
The SIST EN 300 452 standard is crucial for:
- Telecommunications Operators: Ensuring uniform connection quality and interface compatibility in fixed public networks, particularly for cross-border and national leased line offerings.
- Equipment Manufacturers: Designing terminal and network equipment for compliance with European standards, supporting interoperability and ease of deployment.
- Enterprise Networks: Facilitating reliable analogue leased line services for high-quality voice transmission, commonly used by financial institutions, broadcasters, emergency services, and utilities requiring assured, low-latency analog voice paths.
- Network Maintenance: Providing a basis for acceptability during commissioning tests or when returning circuits to service after maintenance.
Related Standards
- EN 300 453: Focuses on the terminal equipment interface for both ordinary and special quality voice bandwidth 4-wire analogue leased lines, complementing SIST EN 300 452.
- ITU-T Recommendations (e.g., M.1020, O.71, O.81, O.91, O.95, O.132): Provide referenced methods and limits for measuring delay, noise, distortion, and other relevant performance criteria.
- ISO/IEC 8877: Specifies the physical interface connectors and contact assignments.
- CENELEC EN 60950: Covers product safety requirements for telecommunications equipment, referenced for aspects beyond the scope of SIST EN 300 452.
By following SIST EN 300 452 V1.2.1:2004, stakeholders can achieve standardized leased line performance, increased interoperability, and regulatory compliance across the European telecommunications sector, meeting demands for quality and reliability in specialized voice applications.
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Frequently Asked Questions
SIST EN 300 452 V1.2.1:2004 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Access and Terminals (AT); Special quality voice bandwidth 4-wire analogue leased line (A4S); Connection characteristics and network interface presentation". This standard covers: Specification of the public network side of the interface and the performance of the leased line service, including test procedures for compliance Revision of ETS 300 452 to improve the safety related text following a liaison from TC Safety.
Specification of the public network side of the interface and the performance of the leased line service, including test procedures for compliance Revision of ETS 300 452 to improve the safety related text following a liaison from TC Safety.
SIST EN 300 452 V1.2.1:2004 is classified under the following ICS (International Classification for Standards) categories: 33.040.50 - Lines, connections and circuits. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 452 V1.2.1:2004 is associated with the following European legislation: Standardization Mandates: T-147-2. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 300 452 V1.2.1:2004 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Access and Terminals (AT); Special quality voice bandwidth 4-wire analogue leased line (A4S); Connection characteristics and network interface presentation33.040.50Vodi, zveze in tokokrogiLines, connections and circuitsICS:Ta slovenski standard je istoveten z:EN 300 452 Version 1.2.1SIST EN 300 452 V1.2.1:2004en01-oktober-2004SIST EN 300 452 V1.2.1:2004SLOVENSKI
STANDARD
ETSIEN300452V1.2.1(2001-07)EuropeanStandard(Telecommunicationsseries)AccessandTerminals(AT);Specialqualityvoicebandwidth4-wireanalogueleasedline(A4S);ConnectioncharacteristicsandnetworkinterfacepresentationSIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(2001-07)2ReferenceREN/AT-010005KeywordsONP,leasedlineETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frCopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2001.Allrightsreserved.SIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(2001-07)3ContentsIntellectualPropertyRights.5Foreword.5Introduction.51Scope.62References.63Definitionsandabbreviations.73.1Definitions.73.2Abbreviations.74Requirementsandtests.84.1Connectioncharacteristics.84.1.1Tabulationofconnectioncharacteristics.84.1.2Overallloss.84.1.3Loss/frequencydistortion.94.1.4Transmissionsignals.94.1.4.1Maximummeaninputpower.94.1.4.2Maximuminstantaneouspower.104.1.4.3Maximumsignalpowerat10Hzbandwidth.104.1.4.4Maximuminputpoweroutsidethevoiceband.104.1.5Transmissiondelay.104.1.6Group-delaydistortion.114.1.7Variationofoveralllosswithtime.124.1.7.1Amplitudehits.124.1.7.2Othervariations.124.1.8Randomcircuitnoise.124.1.9Impulsivenoise.124.1.10Phasejitter.124.1.11Distortion.134.1.11.1Quantizingdistortion.134.1.11.2Totaldistortion.134.1.12Singletoneinterference.134.1.13Frequencyerror.134.1.14Harmonicdistortion.134.2Interfacepresentation.134.2.1Connectorspecification.144.2.2Hardwiredpresentation.144.2.3Returnloss.144.2.4Powerfeeding.154.3Safety.154.4Overvoltage.154.5ElectroMagneticCompatibility(EMC).154.6Availability.15AnnexA(normative):Testmethods.16A.1General.16A.1.1Equipmentconnection.16A.1.2Referenceimpedance.16A.1.3Measurementfrequency.16A.2TestMethods.17A.2.1Overallloss.17A.2.2Loss/frequencydistortionandmaximummeaninputpower.18A.2.3Transmissiondelay.19A.2.4Groupdelaydistortion.19SIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(2001-07)4A.2.5Amplitudehits.20A.2.6Randomcircuitnoise.21A.2.7Impulsivenoise.21A.2.8Phasejitter.22A.2.9Totaldistortion.23A.2.10Singletoneinterference.23A.2.11Frequencyerror.24A.2.12Harmonicdistortion.24A.2.13Maximuminstantaneouspower.25A.2.14Returnloss.26A.2.15Powerfeeding.27AnnexB(informative):Weightedreturnlossmeasurements.28B.1Introduction.28B.2Weightingfunction.28B.2.1Calculation(trapezoidalrule).28B.2.2Calculation(tabulateddata).29AnnexC(informative):Overalllossandquantizingdistortion.30C.1Introduction.30C.2Overallloss.31C.3Quantizingdistortion.32AnnexD(informative):Availability.33D.1General.33D.1.1Unavailability.33D.1.2Availability.33D.2Definitionofunavailabilityperiods.33D.3Availabilityfigures.35AnnexE(informative):Bibliography.36History.37SIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(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)toprovidestandardsforsupportoftheDirectiveonOpenNetworkProvision(ONP)ofleasedlines(92/44/EEC).Thereisanotherstandarddirectlyrelatedtothepresentdocument:-EN300453:"AccessandTerminals(AT);OrdinaryandSpecialqualityvoicebandwidth4-wireanalogueleasedlines(A4OandA4S);Terminalequipmentinterface".ThepresentdocumentisbasedoninformationfromITU-TRecommendationsandETSIpublicationsandtherelevantdocumentsarequotedwhereappropriate.NationaltranspositiondatesDateofadoptionofthisEN:29June2001DateoflatestannouncementofthisEN(doa):30September2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31March2002DateofwithdrawalofanyconflictingNationalStandard(dow):31March2002IntroductionTheCouncilDirectiveontheapplicationofONPtousedlines(92/44/EEC)(seeannexE),concernstheharmonizationofconditionsforopenandefficientaccessto,anduseof,theleasedlinesprovidedoverpublictelecommunicationsnetworksandtheavailabilitythroughouttheEuropeanUnion(EU)ofaminimumsetofleasedlineswithharmonizedtechnicalcharacteristics.TheconsequenceoftheDirectiveisthattelecommunicationsorganizationswithintheEUshallmakeavailableasetofleasedlineswithinandbetweenpointsinthesecountrieswithspecifiedconnectioncharacteristicsandspecifiedinterfaces.UndertheDirective91/263/EEC(seeannexE),laterreplacedby98/13/EC(seeannexE),terminalequipmentforconnectiontotheseleasedlineswasrequiredtofulfilcertainessentialrequirements.Thepresentversionofthepresentdocumenthasbeenproducedtointroducesomenecessarychanges.ITU-TRecommendationM.1020(seeannexE)wasusedasthebasisfortheconnectioncharacteristics.SIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(2001-07)61ScopeThepresentdocumentspecifiesthetechnicalrequirementsandtestprinciplesfortheconnectioncharacteristicsandthephysicalandelectricalcharacteristics(exceptsafety,overvoltageandEMCaspects)ofthenetworkinterfacepresentationofspecialquality,voicebandwidth,4-wire,analogueleasedlines,providedaspartoftheminimumsetundertheCouncilDirectiveontheapplicationofOpenNetworkProvision(ONP)toleasedlines(92/94/EEC)(seeannexE).AconnectionispresentedviainterfacesatNetworkTerminationPoints(NTPs)andincludesanyequipmentthatmayprovidetheNTP.Signalsbetweenterminalequipmentsaresubjecttoimpairmentsduringtheirtransferovertheconnection.Thelimitstotheseimpairmentsarestatedinthepresentdocumentalthoughinpracticetheoverallperformancemaybeconsiderablybetter.Theleasedlineprovidesaccesstothevoicebandwidth(300Hzto3400Hz)withnorestrictionsontheuseofthefrequencies.Therequirementsofthepresentdocumenthavebeenchosenprimarilyforthetransmissionofdatabetweenterminalequipmentswithoutequalizersalthoughthereisnorestrictionontheuseoftheleasedlineforothertypesoftraffic.Thepresentdocumentisapplicableforleasedlines,includingparttimeleasedlines,forwhichtheestablishmentorreleasedoesnotrequireanyprotocolexchangeorotherinterventionattheNTP.Thetestsspecifiedinthepresentdocumentcannotbecarriedout,norcanperformancebemonitoredbytheleasedlineprovider,whiletheleasedlineisinservice,i.e.carryinguser'straffic.Thusthetestsaredesignedforbringingintoandreturningintoservicealthoughthereisnoobligationtoperformthesetestseachtimetheleasedlineisbroughtintoorreturnedintoservice.Thepresentdocumentcoversthephysical,mechanicalandelectricalcharacteristicsofthenetworkinterfaceandspecifiestheconformancetestsfortheconnectioncharacteristicsandnetworkinterface.Someofthetestsdescribedinthepresentdocumentarenotdesignedtobeappliedtotheinterfaceofaninstalledleasedline;suchtestsmaybeappliedtoequipmentofthekindusedtoprovidetheinterface.Thepresentdocumentdoesnotincludedetailsconcerningtheimplementationofthetestsnordoesitincludeinformationonanyregulationsconcerningtesting.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ITU-TRecommendationO.71(1988):"Impulsivenoisemeasuringequipmentfortelephone-typecircuits".[2]ITU-TRecommendationO.81(1988):"Group-delaymeasuringequipmentfortelephone-typecircuits".[3]ITU-TRecommendationO.91(1988):"Phasejittermeasuringequipmentfortelephone-typecircuits".[4]ITU-TRecommendationO.95(1988):"Phaseandamplitudehitcountersfortelephone-typecircuits".[5]ITU-TRecommendationO.132(1988):"Quantizingdistortionmeasuringequipmentusingasinusoidaltestsignal".SIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(2001-07)7[6]ISO/IEC8877(1992):"Informationtechnology.Telecommunicationsandinformationexchangebetweensystems.InterfaceconnectorandcontactassignmentsforISDNBasicAccessInterfacelocatedatreferencepointsSandT".[7]ITU-TRecommendationO.41(1994):"Psophometerforuseontelephone-typecircuits".[8]ETSIEN300453:"AccessandTerminals(AT);OrdinaryandSpecialqualityvoicebandwidth4-wireanalogueleasedlines(A4OandA4S);Terminalequipmentinterface".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:groupdelay:measureofthepropagationtimethroughtheleasedline.Foragivenfrequencyitisequaltothefirstderivativeofthephaseshiftthroughtheleasedline,measuredinradians,withrespecttotheangularfrequencymeasuredinradianspersecondgroupdelaydistortion:differencebetweengroupdelayatagivenfrequencyandminimumgroupdelay,inthefrequencybandofinterestleasedlines:telecommunicationsfacilitiesprovidedbyapublictelecommunicationnetworkthatprovidedefinedtransmissioncharacteristicsbetweennetworkterminationpointsandthatdonotincludeswitchingfunctionsthattheusercancontrol,(e.g.on-demandswitching)NetworkTerminationPoint(NTP):allphysicalconnectionsandtheirtechnicalaccessspecificationswhichformpartofthepublictelecommunicationsnetworkandarenecessaryforaccesstoandefficientcommunicationthroughthatpublicnetworkreferenceimpedanceZR:thisis600Ω.SeealsoclauseA.1.2terminalequipment:equipmentintendedtobeconnectedtothepublictelecommunicationnetwork;i.e.:-tobeconnecteddirectlytotheterminationofapublictelecommunicationnetwork;or-tointerworkwithapublictelecommunicationnetworkbeingconnecteddirectlyorindirectlytotheterminationofapublictelecommunicationnetwork,inordertosend,process,orreceiveinformationvoicebandwidth:bandoffrequenciesovertherange300Hzto3400Hz3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:aReturnlossindBaf()ReturnlossatfrequencyfindBawWeightedreturnlossindBAf()ReturnlossatfrequencyfexpressedasaratioA4SSpecialqualityvoicebandwidth4-wireanalogueleasedlineADPCMAdaptiveDifferentialPulseCodedModulationEMCElectroMagneticCompatibilityffrequencyNTPNetworkTerminationPointONPOpenNetworkProvisionqduquantizingdistortionunitrmsrootmeansquareSIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(2001-07)8RXReceiveisasignalinputateithertheleasedlineinterfaceorthetestequipmentTXTransmitisasignaloutputateithertheleasedlineinterfaceorthetestequipmentZRReferenceimpedance4Requirementsandtests4.1ConnectioncharacteristicsThespecialqualityvoicebandwidth4-wireanalogueleasedlineisabidirectionalline,configuredpoint-to-point,nominallycoveringthevoicebandwidth.Theconnectionis,ingeneral,symmetrical,i.e.eachdirectionoftransmissionhasthesamenominalcharacteristics,althoughtheactualvaluesareindependent.4.1.1TabulationofconnectioncharacteristicsTheparametersdefiningthecharacteristicsoftheconnectionaregivenintable1.Thesecharacteristicsdefinetheserviceoffered.Table1:NetworkperformancecharacteristicsDescriptionNatureReferenceclauseOverallloss0≤overallloss≤13dB4.1.2Loss/frequencydistortiontable2,figure14.1.3Transmissionsignals-maximummeaninputpower-maximuminstantaneouspower-signalpowerina10Hzbandwidth-maximuminputpoweroutsidevoiceband-13dBm0dBmnorequirementnorequirement4.1.44.1.4.14.1.4.24.1.4.34.1.4.4Transmissiondelay-terrestrial(fordistanceGinkilometres)-viasatellite<(15+0,01G)ms<350ms4.1.5Groupdelaydistortiontable3,figure24.1.6Variationofoveralllosswithtime-amplitudehits-othervariations≤10ina15minuteperiod±4dBofthatat1020Hz4.1.74.1.7.14.1.7.2Randomcircuitnoise<-41dBm0p(seenote)4.1.8Impulsivenoise≤18peaks≥-21dBm0ina15minuteperiod(seenote)4.1.9Phasejitter≤10°peaktopeak4.1.10Totaldistortion-quantizingdistortion-totaldistortion≤3qdu;noADPCM>28dBsignaltodistortionratio4.1.114.1.11.14.1.11.2Singletoneinterference≤-44dBm0(seenote)4.1.12Frequencyerror≤±5Hz4.1.13Harmonicdistortion≥25dBbelowfundamental4.1.14NOTE:Wheretheoutputrelativelevelisnotdefined,analternativevalueisspecifiedinthereferenceclause.4.1.2OveralllossRequirement:Theoverallloss,includinglongtermvariations,presentedtoasignalfrequencyof1020Hzsentatapowerlevelof-13dBmineachdirectionoftransmissionwiththelineterminatedin600Ωateachendshallbeintherange:0≤overallloss≤13dB.NOTE:Theoveralllossineachdirectioncanbedifferent.Test:ThetestshallbeconductedaccordingtoclauseA.2.1.SIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(2001-07)94.1.3Loss/frequencydistortionRequirement:Theoveralllossrelativetothatdefinedinclause4.1.2abovefortheconnection,presentedtoasignalsentatapowerlevelof-13dBmwiththelineterminatedin600Ωateachendshallliebetweenthelimitsgivenintable2andfigure1.Below300Hzandabove3600Hztherelativelossshallnotbelessthan-2dBand0dBrespectively,butisotherwiseunspecified.Table2:Limitsforlossofthecircuitrelativetothatat1020HzUpperlimitLowerlimitPoint(seefigure1)FrequencyHzRelativelossdBPoint(seefigure1)FrequencyHzRelativelossdBA3006G500-2B5006H500-1C5003I2800-1D28003J2800-2E28006K3600-2F30006L36000300500FrequencyHz0-1-236RelativelossdB2800360030001020ABCDEFGHIJKLFigure1:Limitsforoveralllossofthecircuitrelativetothatat1020HzTest:ThetestshallbeconductedaccordingtoclauseA.2.2.4.1.4Transmissionsignals4.1.4.1MaximummeaninputpowerRequirement:Theleasedlineshallbecapableofcarryinganysignalpresentedattheinputwithaoneminutemeanpowerlevelof-13dBmwithinavoicebandwidthof300Hzto3400Hzwiththelineterminatedin600Ωateachend.Test:ThetestshallbeconductedaccordingtoclauseA.2.2.SIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(2001-07)104.1.4.2MaximuminstantaneouspowerRequirement:Theleasedlineshallbecapableofcarryingasignalattheinputhavingamaximumvalueequaltoaninstantaneouspowerwhichis13dBabovethemeanvalueof-13dBm(i.e.0dBm).NOTE:ThisvalueisbaseduponaprovisionalITU-Tvalue.SeeITU-TRecommendationV.2(seeannexE).Test:ThetestshallbeconductedaccordingtoclauseA.2.13.4.1.4.3Maximumsignalpowerat10HzbandwidthThereisnorequirementformaximumpowerina10Hzbandwidth.NOTE:However,thereisacorrespondingrequirementontheterminalequipmentspecifiedinEN300453[8].4.1.4.4MaximuminputpoweroutsidethevoicebandNOTE:Theleasedlineinterfaceisnotsuitableforthehandlingofsignalsbelow300Hzandabove3400Hz.Outofbandsignalsfromtheterminalequipmentarelimitedtoavoidtroubleinthenetwork(seeterminalequipmentinterfacerequirementinEN300453[8]).4.1.5TransmissiondelayRequirement:Therequirementdependsuponwhethersatellitetransmissionisinvolvedintheconnectionornot:1)a)forconnectionswheresatellitetransmissionisnotinvolvedtheonewayend-to-enddelayshallbelessthan(15+0,01G)ms,whereGisthegeographicaldistanceinkilometres,asshowninfigure2;orDelay(ms)Geographicaldistance(km)100090003000600010015Figure2:Upperlimitofdelayb)forconnectionswheresatellitetransmissionisinvolvedtheonewayend-to-enddelayshallbelessthan350ms.NOTE:Requirementsa)andb)arebasedonannexA.2andA.3ofITU-TRecommendationG.114(seeannexE),withsuitableadjustmenttorequirementa)toallowforthepossibleuseofloadedcable.Test:ThetestshallbeconductedaccordingtoclauseA.2.3.SIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(2001-07)114.1.6Group-delaydistortionRequirement:Theconnectionshallconformtothelimitsforgroupdelaydistortiongivenintable3andfigure3inwhichthelimitingvaluesoverthefrequencybandareexpressedasvaluesrelativetotheminimummeasuredgroupdelayinthe500Hzto2800Hzfrequencyband.NOTE:Figure3isbasedonfigure2ofITU-TRecommendationM.1020(seeannexE).Table3:Limitsforgroupdelayrelativetotheminimummeasuredgroupdelayinthe500Hzto2800HzbandUpperlimitPoint(seefigure3)FrequencyHzGroupdelaydistortionmsA5003,0B6003,0C6001,5D10001,5E10000,5F26000,5G26003,0H28003,0300500FrequencyHz2800260001234Groupdelaydistortionms56001000ABCDEFGHFigure3:Limitsforgroupdelayrelativetotheminimummeasuredgroupdelayinthe500Hzto2800HzbandTest:ThetestshallbeconductedaccordingtoclauseA.2.4.SIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(2001-07)124.1.7Variationofoveralllosswithtime4.1.7.1AmplitudehitsRequirement:WhenmeasurementsaremadeusinganinstrumentcomplyingwithITU-TRecommendationO.95[4]withthesendlevelsetat-13dBmatafrequencyof1020Hz,thenumberofamplitudehitsgreaterthan±2dBshallnotexceed10inany15minutemeasuringperiod.NOTE:Phaseoramplitudehitsaredefinedassuddenpositiveornegativechangesinphaseoramplitudeofanobservedtestsignalwhichexceedaspecifiedthresholdandpersistforaperiodoftimegreaterthanaspecifiedduration.Test:ThetestshallbeconductedaccordingtoclauseA.2.5.4.1.7.2OthervariationsRequirement:Foraparticularimplementationvariationswithtimeoftheoveralllossat1020Hz(includingdailyandseasonalvariationsbutexcludingamplitudehits)shallnotexceed±4dBvariationfromthevalueestablishedbythetestforoverallloss,seeclause4.1.2.Anysuchvariationshallnotresultinanoveralllossgreaterthanthemaximumspecifiedinclause4.1.2.Test:Thereisnotestforthisbuttherecordoftheresultsofsuccessivetestsofoveralllossmaybeusedtocheckcompliance.ThetestshallbeconductedaccordingtoclauseA.2.1.4.1.8RandomcircuitnoiseRequirement:Thelevelofthepsophometricnoisepowerattheoutputoftheleasedlineshallbelessthan-41dBm0p.Inorderthatthisparametercanbetested,theleasedlineprovidershoulddeclaretheplannedvalueoftheoutputrelativeleveloftheleasedline.Wheretheoutputrelativeleveleitherisnot,orcannotbe,declaredbytheleasedlineprovider,thepsophometricallyweightedrandomcircuitnoiselevelshallbe28dBbelowareceivedtestsignalwhichissentatalevelof-13dBmatafrequencyof1020Hzintothefarendoftheleasedline.Test:ThetestshallbeconductedaccordingtoclauseA.2.6.4.1.9ImpulsivenoiseRequirement:Withaninputsignallevelof-13dBmappliedatafrequencyof1020Hztotheinputoftheleasedline,thereshallnotbemorethan18impulsivenoisepeaksexceedingathresholdlevelof-21dBm0withinaperiodof15minutes.Inorderthatthisparametercanbetested,theleasedlineprovidershoulddeclaretheplannedvalueoftheoutputrelativeleveloftheleasedline.Wheretheoutputrelativeleveleitherisnot,orcannotbe,declaredbytheleasedlineprovider,thethresholdlevelshallbe8dBbelowthereceivedsignallevel.Thus,ifasignallevelof-13dBmisappliedattheinputandthelinelossis13dBthenthereceivedsignallevelwillbe-26dBmandthethresholdforimpulsivenoisepeakswillbe-34dBm.Test:ThetestshallbeconductedaccordingtoclauseA.2.7.4.1.10PhasejitterRequirement:Thephasejittershallbelessthanorequalto10°peak-to-peakwhenmeasuredatafrequencyof1020Hz.Test:ThetestshallbeconductedaccordingtoclauseA.2.8.SIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(2001-07)134.1.11Distortion4.1.11.1QuantizingdistortionRequirement:Thequantizingdistortionshallnotexceed3quantizingdistortionunit(qdu).Moreover,AdaptiveDifferentialPulseCodedModulation(ADPCM)systemsshallnotbeused.NOTE:Insomecases(e.g.internationalleasedlinesspanningseveraltransitcountries,particularnetworkconfigurations),anallocationof4qdumaybeneeded.Test:Thereisnotest.Thisrequirementshallbecheckedbycalculationusinginformationfromthenetworkplans.4.1.11.2TotaldistortionRequirement:Withapowerlevelof-13dBmappliedatafrequencyof1020Hztotheinputoftheleasedline,thesignaltototaldistortionratioshallbegreaterthan28dB.Test:ThetestshallbeconductedaccordingtoclauseA.2.9.4.1.12SingletoneinterferenceRequirement:Thepowerlevelofsingletoneinterferenceintheband300Hzto3400Hzshallnotexceed-44dBm0,thatis3dBlessthanthepermittednoisepowerlevel(seeclause4.1.8).Inorderthatthisparametercanbetested,theleasedlineprovidershoulddeclaretheplannedvalueoftheoutputrelativeleveloftheleasedline.Wheretheoutputrelativeleveleitherisnot,orcannotbe,declaredbytheleasedlineprovider,thepowerlevelofanysingletoneshallbe31dBbelowareceivedtestsignalwhichissentatalevelof-13dBmatafrequencyof1020Hzintothefarendoftheleasedline.Test:ThetestshallbeconductedaccordingtoclauseA.2.10.4.1.13FrequencyerrorRequirement:Thefrequencyerrorintroducedbytheconnectionshallbelessthanorequalto±5Hzwhenmeasuredatafrequencyof1020Hz.Test:ThetestshallbeconductedaccordingtoclauseA.2.11.4.1.14HarmonicdistortionRequirement:Whena700Hztestfrequencyof-13dBmisinjectedattheinputoftheleasedline,thelevelofanyindividualharmonicfrequencyattheoutputshallbeatleast25dBbelowthereceivedlevelofthefundamentalfrequency.Test:ThetestshallbeconductedaccordingtoclauseA.2.12.4.2InterfacepresentationThephysicalconnectionarrangementsshallnormallybebyasocketasspecifiedinclause4.2.1;howeveratthespecificrequestoftheusertheconnectionarrangementsspecifiedinclause4.2.2shallbeprovided.SIST EN 300 452 V1.2.1:2004
ETSIETSIEN300452V1.2.1(2001-07)144.2.1ConnectorspecificationRequirement:Thenetworkinterfaceshallprovidean8-contactsocketofthetypespecifiedinISO/IEC8877[6]andwithcontactassignmentsasspecifiedintable4.Table4:ContactassignmentContactNetworkinterface1Unused2Unused3&6Receivepair4&5Transmitpair7Unused8UnusedNOTE:Thetransmitpairistheoutputfromthenetworkinterface.Thereceivepairistheinputtothenetworkinterfaceasshowninfigure4.Wheretheterms"output"and"input"areusedwithoutqualificationinthepresentdocument,theyrefertothenetworkinterface.TXRXRXTXTERMINALEQUIPMENTINTERFACENETWORKINTERFACEOUTPUTINPUTINPUTOUTPUTFigure4:LeasedlineconfigurationconventionsTest:Thereshallbeavisualinspectionthatthesocketisofthecorrecttype.ThecontactassignmentsaretestedindirectlythroughthetestsinannexA.4.2.2HardwiredpresentationRequirement:Thenetworkinterfaceshallprovideasetofconnectioncontacts(e.g.aninsulationdisplacementconnectororascrewterminalblock)towhichsolidconductorswithwirediametersintherange0,4mmto0,6mmmaybeconnected.Theleasedlineprovidershallprovideinformationontheconfigurationoftheconnectioncontactsusedforeachleasedlineinterface.Test:Thereshallbeavisualinspectionthatboththeconnectionmethodprovidedsuitablefortakingsolidconductorsasdefinedintherequirementandthatinformationontheconfigurationisprovided.NOTE:Allsubsequenttestsarecarriedoutviatheappropriateconnectionmethod.4.2.3ReturnlossRequirement:Thereturnlosspresentedbythenetworkinterfaceagainstthereferenceimpedance,whe
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