SIST EN 300 449 V1.2.1:2004
(Main)Access and Terminals (AT); Special quality voice bandwidth 2-wire analogue leased line (A2S); 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 300 449 to improve the safety related text following a liaison received 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 300 449 V1.2.1:2004 is a Slovenian adaptation of the European standard EN 300 449, produced by the European Telecommunications Standards Institute (ETSI) and adopted by the Slovenski inštitut za standardizacijo (SIST). This standard specifies the network side requirements and interface characteristics for special quality voice bandwidth 2-wire analogue leased lines, also known as A2S lines. It provides detailed technical requirements, test methods, and conditions for service compliance, focusing on the delivery of reliable leased line services for voice and data communication.
The standard addresses connections and network interface presentations at the Network Termination Point (NTP), aligning with regulations under the European Council Directive on Open Network Provision (ONP) for leased lines. It ensures that providers offer harmonized leased line services with consistent technical performance across the European Union.
Key Topics
- Connection Characteristics: Outlines required parameters such as overall loss, transmission delay, group delay distortion, circuit noise, phase jitter, echo, and stability for 2-wire analogue leased lines.
- Network Interface Presentation: Specifies physical and electrical characteristics of the network-side interface, typically provided by an 8-contact socket (as per ISO/IEC 8877) or alternatively, via hardwired terminal blocks for solid conductors.
- Compliance Testing: Describes test methods for confirming requirements, including frequency, power, noise, and signal distortion, ensuring consistent leased line performance and interoperability.
- Service Applications: Tailored primarily for transmission of data and voice signals with no requirement for protocol exchange at the NTP during connection establishment or release.
- Safety and EMC: Safety, overvoltage, and electromagnetic compatibility (EMC) aspects are outside the scope of this document, referencing CENELEC and other relevant standards for these issues.
Applications
SIST EN 300 449 is widely applicable in scenarios where high-quality, reliable, and standardized voice or data transmission over analogue leased lines is required. Typical use cases include:
- Business Communications: Supporting critical business functions that depend on uninterrupted voice or data transmission between sites.
- Telecommunications Providers: Enabling operators to offer a minimum set of leased line services in compliance with EU ONP directives.
- Terminal Equipment Integration: Facilitating manufacturers of terminal equipment to ensure products are compatible at the network interface, improving interoperability and ease of deployment.
- Test and Commissioning: Providing guidance for test procedures during service installation and maintenance, ensuring that leased lines deliver the required quality and performance.
- Migration and Modernization: Supporting gradual transitions from analogue infrastructure to digital technologies, while maintaining service quality for existing analogue leased lines.
Related Standards
- EN 300 450: Defines the terminal equipment interface for ordinary and special quality 2-wire analogue leased lines, providing complementary requirements to EN 300 449.
- ITU-T Recommendations: The standard references key ITU-T documents (e.g., M.1020, O.71, O.81, O.91, O.95) for measurement methods and technical definitions.
- ISO/IEC 8877: Specifies connector and contact assignments for ISDN and similar network interfaces.
- CENELEC Standards (e.g., EN 60950): Recommended for safety aspects relating to leased line interfaces, even though these are out of scope for EN 300 449.
SIST EN 300 449 V1.2.1:2004 ensures interoperability, service quality, and regulatory compliance for special quality 2-wire analogue leased line services, supporting both legacy and modern telecommunications environments across the EU and Slovenia. Its rigorous approach to interface and network characteristics is essential for network operators, equipment vendors, and businesses relying on leased line solutions.
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Frequently Asked Questions
SIST EN 300 449 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 2-wire analogue leased line (A2S); 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 300 449 to improve the safety related text following a liaison received 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 300 449 to improve the safety related text following a liaison received from TC Safety.
SIST EN 300 449 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 300 449 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 300 449 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 2-wire analogue leased line (A2S); Connection characteristics and network interface presentation33.040.50Vodi, zveze in tokokrogiLines, connections and circuitsICS:Ta slovenski standard je istoveten z:EN 300 449 Version 1.2.1SIST EN 300 449 V1.2.1:2004en01-oktober-2004SIST EN 300 449 V1.2.1:2004SLOVENSKI
STANDARD
ETSIEN300449V1.2.1(2001-07)EuropeanStandard(Telecommunicationsseries)AccessandTerminals(AT);Specialqualityvoicebandwidth2-wireanalogueleasedline(A2S);ConnectioncharacteristicsandnetworkinterfacepresentationSIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)2ReferenceREN/AT-010002KeywordsONP,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 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)3ContentsIntellectualPropertyRights.5Foreword.5Introduction.51Scope.62References.63Definitions,symbolsandabbreviations.73.1Definitions.73.2Symbolsandabbreviations.74Requirements.84.1Connectioncharacteristics.84.1.1Tabulationofconnectioncharacteristics.84.1.2Overallloss.94.1.3Loss/frequencydistortion.94.1.4Transmissionsignals.104.1.4.1Maximummeaninputpower.104.1.4.2Maximuminstantaneouspower.104.1.4.3Maximumpowerina10Hzbandwidth.104.1.4.4Maximuminputpoweroutsidethevoiceband.104.1.5Transmissiondelay.104.1.6Groupdelaydistortion.114.1.7Variationofoveralllosswithtime.124.1.7.1Amplitudehits.124.1.7.2Othervariations.124.1.8Randomcircuitnoise.124.1.9Impulsivenoise.134.1.10Phasejitter.134.1.11Distortion.134.1.11.1Quantizingdistortion.134.1.11.2Totaldistortion.134.1.12Singletoneinterference.134.1.13Frequencyerror.144.1.14Harmonicdistortion.144.1.15Echoandstability.144.1.15.1Echo.144.1.15.1.1Echocontroldevices.144.1.15.1.2Talkerecho.144.1.15.1.3Listenerecho.144.1.15.2Stability.144.2Interfacepresentation.144.2.1Connectorspecification.154.2.2Hardwiredpresentation.154.2.3Returnloss.154.2.4Powerfeeding.164.3Safety.164.4Overvoltage.164.5ElectroMagneticCompatibility(EMC).164.6Availability.16AnnexA(normative):Testmethods.17A.1General.17A.1.1Equipmentconnection.17A.1.2Referenceimpedance.17A.1.3Non-reactivelinetermination.18SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)4A.1.4Measurementfrequency.18A.2Testmethods.18A.2.1Overallloss.18A.2.2Loss/frequencydistortionandmaximummeaninputpower.19A.2.3Maximuminstantaneouspower.19A.2.4Groupdelaydistortion.20A.2.5Amplitudehits.20A.2.6Randomcircuitnoise.21A.2.7Impulsivenoise.21A.2.8Phasejitter.22A.2.9Totaldistortion.22A.2.10Singletoneinterference.23A.2.11Frequencyerror.23A.2.12Harmonicdistortion.24A.2.13Stability.24A.2.14Returnloss.25A.2.15Powerfeeding.26AnnexB(informative):Weightedreturnlossmeasurements.27B.1Introduction.27B.2Weightingfunction.27B.2.1Calculation(trapezoidalrule).27B.2.2Calculation(tabulateddata).28AnnexC(informative):Overalllossandquantizingdistortion.29C.1Introduction.29C.2Overallloss.30C.3Quantizingdistortion.31AnnexD(informative):Availability.32D.1General.32D.1.1Unavailability.32D.1.2Availability.32D.2Definitionofunavailabilityperiods.32D.3Availabilityfigures.34AnnexE(informative):Bibliography.35History.36SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(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:-EN300450:"AccessandTerminals(AT);OrdinaryandSpecialqualityvoicebandwidth2-wireanalogueleasedlines(A2OandA2S);Terminalequipmentinterface".ThepresentdocumentisbasedoninformationfromITU-TRecommendationsandETSIpublicationsandtherelevantdocumentsarequotedwhereappropriate.NationaltranspositiondatesDateofadoptionofthisEN:29June2001DateoflatestannouncementofthisEN(doa):30September2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31March2002DateofwithdrawalofanyconflictingNationalStandard(dow):31March2002IntroductionTheCouncilDirectiveontheapplicationofONPtoleasedlines(92/44/EEC)(seeannexE)concernstheharmonizationofconditionsforopenandefficientaccessto,anduseof,theleasedlinesprovidedoverpublictelecommunicationsnetworks,andtheavailabilitythroughouttheEuropeanUnion(EU)ofaminimumsetofleasedlineswithharmonizedtechnicalcharacteristics.TheconsequenceoftheDirectiveisthattelecommunicationsorganizationswithintheEUshallmakeavailableasetofleasedlineswithinandbetweenpointsinthesecountrieswithspecifiedconnectioncharacteristicsandspecifiedinterfaces.UndertheDirective91/263/EEC(seeannexE),laterreplacedby98/13/EC(seeannexE),terminalequipmentforconnectiontotheseleasedlineswasrequiredtofulfilcertainessentialrequirements.Thepresentversionofthepresentdocumenthasbeenproducedtointroducesomenecessarychanges.ITU-TRecommendationM.1020(seeannexE)wasusedasthebasisfortheconnectioncharacteristics.SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)61ScopeThepresentdocumentspecifiesthetechnicalrequirementsandtestprinciplesfortheconnectioncharacteristicsandthephysicalandelectricalcharacteristics(exceptsafety,overvoltageandEMCaspects)ofthenetworkinterfacepresentationofspecialquality,voicebandwidth,2-wire,analogueleasedlines,providedaspartoftheminimumsetundertheCouncilDirectiveontheapplicationofOpenNetworkProvision(ONP)toleasedlines(92/44/EEC)(seeannexE).AconnectionispresentedviainterfacesatNetworkTerminationPoints(NTPs)andincludesanyequipmentthatmayprovidetheNTP.Signalsbetweenterminalequipmentsaresubjecttoimpairmentsduringtheirtransferovertheconnection.Thelimitstotheseimpairmentsarestatedinthepresentdocumentalthoughinpracticetheoverallperformancemaybeconsiderablybetter.Theleasedlineprovidesaccesstothevoicebandwidth(300Hzto3400Hz)withnorestrictionsontheuseofthefrequencies.Therequirementsofthepresentdocumenthavebeenchosenprimarilyforthetransmissionofdatabetweenterminalequipmentswithoutequalizersalthoughthereisnorestrictionontheuseoftheleasedlineforothertypesoftraffic.Thepresentdocumentisapplicabletoleasedlines,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 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)7[6]ISO/IEC8877(1992):"Informationtechnology.Telecommunicationsandinformationexchangebetweensystems.InterfaceconnectorandcontactassignmentsforISDNBasicAccessInterfacelocatedatreferencepointsSandT".[7]ITU-TRecommendationO.41(1994):"Psophometerforuseontelephone-typecircuits".[8]ETSIEN300450:"AccessandTerminals(AT);OrdinaryandSpecialqualityvoicebandwidth2-wireanalogueleasedlines(A2OandA2S);Terminalequipmentinterface".3Definitions,symbolsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:groupdelay:measureofthepropagationtimethroughtheleasedline.Foragivenfrequencyitisequaltothefirstderivativeofthephaseshiftthroughtheleasedline,measuredinradians,withrespecttotheangularfrequencymeasuredinradianspersecondgroupdelaydistortion:differencebetweengroupdelayatagivenfrequencyandminimumgroupdelay,inthefrequencybandofinterestleasedlines:telecommunicationsfacilitiesprovidedbyapublictelecommunicationnetworkthatprovidedefinedtransmissioncharacteristicsbetweennetworkterminationpointsandthatdonotincludeswitchingfunctionsthattheusercancontrol,(e.g.on-demandswitching)NetworkTerminationPoint(NTP):allphysicalconnectionsandtheirtechnicalaccessspecificationswhichformpartofthepublictelecommunicationsnetworkandarenecessaryforaccesstoandefficientcommunicationthroughthatpublicnetworkreferenceimpedanceZR:compleximpedancemadeupofaresistanceof270Ωinserieswithaparallelcombinationof750Ωand150nF.SeealsoclauseA.1.2terminalequipment:equipmentintendedtobeconnectedtothepublictelecommunicationnetwork;i.e.:-tobeconnecteddirectlytotheterminationofapublictelecommunicationnetwork;or-tointerworkwithapublictelecommunicationnetworkbeingconnecteddirectlyorindirectlytotheterminationofapublictelecommunicationnetwork,inordertosend,process,orreceiveinformation.voicebandwidth:bandoffrequenciesovertherange300Hzto3400Hz3.2SymbolsandabbreviationsForthepurposesofthepresentdocument,thefollowingsymbolsandabbreviationsapply:aReturnlossindBaf()ReturnlossatfrequencyfindBawWeightedreturnlossindBAf()ReturnlossatfrequencyfexpressedasaratioA2SSpecialqualityvoicebandwidth2-wireanalogueleasedlineADPCMAdaptiveDifferentialPulseCodedModulationEMCElectroMagneticCompatibilityffrequencyNTPNetworkTerminationPointONPOpenNetworkProvisionSIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)8qduquantizingdistortionunitrmsrootmeansquareZRReferenceimpedance4Requirements4.1ConnectioncharacteristicsThespecialqualityvoicebandwidth2-wireanalogueleasedlineisabidirectionalline,configuredpoint-to-point,nominallycoveringthevoicebandwidth.Theconnectionis,ingeneral,symmetrical,i.e.eachdirectionoftransmissionhasthesamenominalcharacteristics,althoughtheactualvaluesareindependent.4.1.1TabulationofconnectioncharacteristicsTheparametersdefiningthecharacteristicsoftheconnectionaregivenintable1.Thesecharacteristicsdefinetheserviceoffered.Table1:NetworkperformancecharacteristicsDescriptionNatureReferenceclauseOverallloss0≤overallloss≤17dB4.1.2Loss/frequencydistortiontable2,figure14.1.3Transmissionsignals-maximummeaninputpower-maximuminstantaneouspower-maximumpowerina10Hzbandwidth-maximuminputpoweroutsidevoiceband-9dBm+4dBmnorequirementnorequirement4.1.44.1.4.14.1.4.24.1.4.34.1.4.4Transmissiondelay-terrestrial(fordistanceGinkilometres)-viasatellite<(15+0,01G)ms<350ms4.1.5Groupdelaydistortiontable3,figure34.1.6Variationofoveralllosswithtime-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≥25dBbelowfundamental4.1.14Echoandstability-Echocontroldevices-Talkerecho-Listenerecho-Stabilitynoechocontrol>10dB>20dB0to4kHz4.1.154.1.15.1.14.1.15.1.24.1.15.1.34.1.15.2NOTE:Wheretheoutputrelativelevelisnotdefined,analternativevalueisspecifiedinthereferenceclause.SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)94.1.2OveralllossRequirement:Theoverallloss,includinglongtermvariations,presentedtoasignalfrequencyof1020Hzsentatapowerlevelof-9dBmineachdirectionoftransmissionwiththelineterminatedin600Ωateachendshallbeintherange:0≤overallloss≤17dBNOTE:Theoveralllossineachdirectioncanbedifferent.Test:ThetestshallbeconductedaccordingtoclauseA.2.1.4.1.3Loss/frequencydistortionRequirement:Theoveralllossrelativetothatdefinedinclause4.1.2abovefortheconnection,presentedtoasignalsentatapowerlevelof-9dBmwiththelineterminatedin600Ωateachendshallliebetweenthelimitsgivenintable2andfigure1.Below300Hzandabove3600Hztherelativelossshallnotbelessthan-2dBand0dBrespectively,butisotherwiseunspecified.Table2:Limitsforlossofthecircuitrelativetothatat1020HzUpperlimitLowerlimitPoint(seefigure1)FrequencyHzRelativelossdBPoint(seefigure1)FrequencyHzRelativelossdBA3006G500-2B5006H500-1C5003I2800-1D28003J2800-2E28006K3600-2F30006L36000300500FrequencyHz0-1-236RelativelossdB2800360030001020ABCDEFGHIJKLFigure1:Limitsforlossofthecircuitrelativetothatat1020HzTest:ThetestshallbeconductedaccordingtoclauseA.2.2.SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)104.1.4Transmissionsignals4.1.4.1MaximummeaninputpowerRequirement:Theleasedlineshallbecapableofcarryinganysignalpresentedattheinputataoneminutemeanpowerlevelof-9dBmwithinavoicebandwidthof300Hzto3400Hzwiththelineterminatedin600Ωateachend.Test:ThetestshallbeconductedaccordingtoclauseA.2.2.4.1.4.2MaximuminstantaneouspowerRequirement:Theleasedlineshallbecapableofcarryingasignalattheinputhavingamaximumvalueequaltoaninstantaneouspowerwhichis13dBabovethemeanvalueof-9dBm(i.e.+4dBm).NOTE:ThisvalueisbaseduponaprovisionalITU-Tvalue.SeeITU-TRecommendationV.2(seeannexE).Test:ThetestshallbeconductedaccordingtoclauseA.2.3.4.1.4.3Maximumpowerina10HzbandwidthThereisnorequirementformaximumpowerina10Hzbandwidth.NOTE:However,thereisacorrespondingrequirementontheterminalequipmentspecifiedinEN300450[8].4.1.4.4MaximuminputpoweroutsidethevoicebandNOTE:Theleasedlineinterfaceisnotsuitableforthehandlingofsignalsbelow300Hzandabove3400Hz.Outofbandsignalsfromtheterminalequipmentarelimitedtoavoidtroubleinthenetwork(seeterminalequipmentinterfacerequirementinEN300450[8]).4.1.5TransmissiondelayRequirement:Therequirementdependsuponwhethersatellitetransmissionisinvolvedintheconnectionornot:a)forconnectionswheresatellitetransmissionisnotinvolvedtheonewayend-to-enddelayshallbelessthan(15+0,01G)ms,whereGisthegeographicaldistanceinkilometres,asshowninfigure2;orb)forconnectionswheresatellitetransmissionisinvolvedtheonewayend-to-enddelayshallbelessthan350ms.NOTE:Requirementsa)andb)arebasedonclausesA.2andA.3ofITU-TRecommendationG.114(seeannexE)withsuitableadjustmenttorequirementa)toallowforthepossibleuseofloadedcable.SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)11Delay(ms)Geographicaldistance(km)100090003000600010015Figure2:UpperlimitofdelayTest:Thereisnotest.Thisrequirementshallbecheckedbycalculationusinginformationfromthenetworkplans.4.1.6GroupdelaydistortionRequirement:Theconnectionshallconformtothelimitsforgroupdelaydistortiongivenintable3andfigure3inwhichthelimitingvaluesoverthefrequencybandareexpressedasvaluesrelativetotheminimummeasuredgroupdelayinthe500Hzto2800Hzfrequencyband.NOTE:Figure3isbasedonfigure2ofITU-TRecommendationM.1020(seeannexE).Table3:Limitsforgroupdelayrelativetotheminimummeasuredgroupdelayinthe500Hzto2800HzbandUpperlimitPoint(seefigure3)FrequencyHzGroupdelaydistortionmsA5003,0B6003,0C6001,5D10001,5E10000,5F26000,5G26003,0H28003,0SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)12300500FrequencyHz2800260001234Groupdelaydistortionms56001000ABCDEFGHFigure3:Limitsforgroupdelayrelativetotheminimummeasuredgroupdelayinthe500Hzto2800HzbandTest:ThetestshallbeconductedaccordingtoclauseA.2.4.4.1.7Variationofoveralllosswithtime4.1.7.1AmplitudehitsRequirement:WhenmeasurementsaremadeusinganinstrumentcomplyingwithITU-TRecommendationO.95[4]withthesendlevelsetat-9dBmatafrequencyof1020Hz,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.SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)13Wheretheoutputrelativeleveleitherisnot,orcannotbe,declaredbytheleasedlineprovider,thepsophometricallyweightedrandomcircuitnoiselevelshallbe28dBbelowareceivedtestsignalwhichissentatalevelof-9dBmatafrequencyof1020Hzintothefarendoftheleasedline.Test:ThetestshallbeconductedaccordingtoclauseA.2.6.4.1.9ImpulsivenoiseRequirement:Withaninputsignallevelof-9dBmappliedatafrequencyof1020Hztotheinputoftheleasedline,thereshallnotbemorethan18impulsivenoisepeaksexceedingathresholdlevelof-21dBm0withinaperiodof15minutes.Inorderthatthisparametercanbetested,theleasedlineprovidershoulddeclaretheplannedvalueoftheoutputrelativeleveloftheleasedline.Wheretheoutputrelativeleveleitherisnot,orcannotbe,declaredbytheleasedlineprovider,thethresholdlevelshallbe8dBbelowthereceivedsignallevel.Thus,ifasignallevelof-9dBmisappliedattheinputandthelinelossis17dBthenthereceivedsignallevelwillbe-26dBmandthethresholdforimpulsivenoisepeakswillbe-34dBm.Test:ThetestshallbeconductedaccordingtoclauseA.2.7.4.1.10PhasejitterRequirement:Thephasejittershallbelessthanorequalto10ºpeak-to-peakwhenmeasuredatafrequencyof1020Hz.Test:ThetestshallbeconductedaccordingtoclauseA.2.8.4.1.11Distortion4.1.11.1QuantizingdistortionRequirement:Thequantizingdistortionshallnotexceed3quantizingdistortionunit(qdu).Moreover,AdaptiveDifferentialPulseCodedModulation(ADPCM)systemsshallnotbeused.NOTE:Insomecases(e.g.internationalleasedlinesspanningseveraltransitcountries,particularnetworkconfigurations)anallocationof4qdumaybeneeded.Test:Thereisnotest.Thisrequirementshallbecheckedbycalculationusinginformationfromthenetworkplans.4.1.11.2TotaldistortionRequirement:Withaninputpowerlevelof-9dBmappliedatafrequencyof1020Hztotheinputoftheleasedline,thesignaltototaldistortionratioshallbegreaterthan28dB.Test:ThetestshallbeconductedaccordingtoclauseA.2.9.4.1.12SingletoneinterferenceRequirement:Thepowerlevelofsingletoneinterferenceintheband300Hzto3400Hzshallnotexceed-44dBm0,thatis3dBlessthanthepermittednoisepowerlevel(seeclause4.1.8).Inorderthatthisparametercanbetested,theleasedlineprovidershoulddeclaretheplannedvalueoftheoutputrelativeleveloftheleasedline.Wheretheoutputrelativeleveleitherisnot,orcannotbe,declaredbytheleasedlineprovider,thepowerlevelofanysingletoneshallbe31dBbelowareceivedtestsignalwhichissentatalevelof-9dBmatafrequencyof1020Hzintothefarendoftheleasedline.Test:ThetestshallbeconductedaccordingtoclauseA.2.10.SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)144.1.13FrequencyerrorRequirement:Thefrequencyerrorintroducedbytheconnectionshallbelessthanorequalto±5Hzwhenmeasuredatafrequencyof1020Hz.Test:ThetestshallbeconductedaccordingtoclauseA.2.11.4.1.14HarmonicdistortionRequirement:Whena700Hztestfrequencyof-9dBmisinjectedattheinputoftheleasedline,thelevelofanyindividualharmonicfrequencyattheoutputshallbeatleast25dBbelowthereceivedlevelofthefundamentalfrequency.Test:ThetestshallbeconductedaccordingtoclauseA.2.12.4.1.15Echoandstability4.1.15.1Echo4.1.15.1.1EchocontroldevicesRequirement:Inordertofacilitatedatatransmission,echocontroldevicesshallnotbeusedintheconnection.Test:Thereisnotest.Thisrequirementshallbecheckedusinginformationfromthenetworkplans.4.1.15.1.2TalkerechoRequirement:Withaninputsignallevelof-9dBminthefrequencyrange300Hzto3600Hzappliedattheinterface,withasourceimpedanceof600Ω,anycompositeechosignalreceivedatthenearendinterfaceshallbegreaterthan10dBbelowthesignalleveltransmittedintotheinterface(i.e.<-19dBm).Test:Thereisnotest.Thisrequirementshallbecheckedbycalculationusinginformationfromthenetworkplans.4.1.15.1.3ListenerechoRequirement:Withaninputsignallevelof-9dBminthefrequencyrange300Hzto3600Hzappliedattheinterface,withasourceimpedanceof600Ω,anycompositeechosignalreceivedatthefarendinterfaceshallbegreaterthan20dBbelowthereceivedlevelofthefundamentalsignal.Test:Thereisnotest.Thisrequirementshallbecheckedbycalculationusinginformationfromthenetworkplans.4.1.15.2StabilityRequirement:Anyleasedlineshallbestableoverthefrequencyrange0Hzto4000Hzforallterminatingconditions.NOTE:Theterm"allterminatingconditions"includesopenandshortcircuitandhighimpedanceterminations.Test:ThetestshallbeconductedaccordingtoclauseA.2.13.4.2InterfacepresentationThephysicalconnectionarrangementsshallnormallybebyasocketasspecifiedinclause4.2.1;howeveratthespecificrequestoftheusertheconnectionarrangementsspecifiedinclause4.2.2shallbeprovided.SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)154.2.1ConnectorspecificationRequirement:Thenetworkinterfaceshallprovidean8-contactsocketofthetypespecifiedinISO/IEC8877[6]andwithcontactassignmentsasspecifiedintable4.Table4:ContactassignmentsContactnumberNetworkinterface1Unused2Unused3Unused4&5Pair6Unused7Unused8UnusedTest:Thereshallbeavisualinspectionthatthesocketisofthecorrecttype.ThecontactassignmentsaretestedindirectlythroughthetestsinannexA.4.2.2HardwiredpresentationRequirement:Thenetworkinterfaceshallprovideasetofconnectioncontacts(e.g.aninsulationdisplacementconnectororascrewterminalblock)towhichsolidconductorswithwirediametersintherange0,4mmto0,6mmmaybeconnected.Theleasedlineprovidershallprovideinformationontheconfigurationoftheconnectioncontactsusedforeachleasedlineinterface.Test:Thereshallbeavisualinspectionthattheconnectionmethodprovidedissuitablefortakingsolidconductorsasdefinedintherequirementandthatinformationontheconfigurationisprovided.NOTE:Allsubsequenttestsarecarriedoutviatheappropriateconnectionmethod.4.2.3ReturnlossRequirement:Thereturnlosspresentedbythenetworkinterfaceagainstthereferenceimpedance,whenthefarendinterfaceoftheconnectionisterminatedbythereferenceimpedance,shalleitherbe:-greaterthan6dBoverthefrequencyrange300Hzto3400Hzwhenmeasuredwithavoltageequivalenttoasignalpowerlevelattheinputtotheleasedlineof-9dBmat1020Hz;or-ifthereturnlossisnotgreaterthan6dBatallfrequencies,thentheweightedreturnlossagainstthereferenceimpedanceshallbegreaterthan6dBoverthefrequencyrange300Hzto3400Hz,whenmeasuredwithavoltageequivalenttoasignalpowerattheinputtotheleasedlineof-9dBmat1020Hz.Theweightedreturnlossawshallbegivenby:aAffdfw=−385103003400,log()dBwhereAfaf()()=−1010andaf()isthemeasuredreturnlossatfrequencyfexpressedindB.Test:ThetestshallbeconductedaccordingtoclauseA.2.14.SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)164.2.4PowerfeedingRequirement:Thenetworkinterfaceshallnotfeedpowertotheterminalequipmentinterfaceandshallnotrequirepowerfromtheterminalequipmentinterface.Test:ThetestforpoweroutputfromthenetworkinterfaceshallbeconductedaccordingtoclauseA.2.15.ThetestfortherequirementnottosupportpowerfeedingfromtheterminalinterfaceistestedindirectlythroughthevarioustestsofannexAsincenopowerissuppliedoverthenetworkinterfacefromthetestequipment.4.3SafetyRequirementsforsafetyareoutsidethescopeofthepresentdocument.SafetystandardsarepublishedbyCENELEC.NOTE1:AnexampleofsuchaCENELECproductsafetystandardisEN60950(seeannexE).NOTE2:Forsafetycategoriesofinterfaces,seeEG201212(seeannexE).ThisdocumentisalsoavailablefromCENELECasROBT-002.4.4OvervoltageOvervoltageaspectsareoutsideofthescopeofthepresentdocument.4.5ElectroMagneticCompatibility(EMC)EMCrequirementsareoutsidethescopethepresentdocument.4.6AvailabilityThereisnorequirementonavailabilityunderthepresentdocument.NOTE1:AnnexDprovidesinformationaboutavailabilityvaluesforanalogueleasedlines.NOTE2:Atpresentsomeleasedlineprovidersincludeavailabilityperformance,definedonanindividualbasisasaqualityofserviceparameter,aspartofthecontractedsupplyconditionsfortheirleasedlineofferings.SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)17AnnexA(normative):TestmethodsA.1GeneralThisannexdescribesthetestprinciplestobeusedtodeterminethecomplianceofaleasedlineconnectionandnetworkinterfacepresentationagainsttherequirementsofthepresentdocument.Itisoutsidethescopeofthisannextoidentifythespecificdetailsoftheimplementationofthetests.Detailsoftestequipmentaccuracyandthespecificationtoleranceofthetestdevicesarenotincludedinallcases.Wheresuchdetailsareprovided,theyshallbecompliedwith,butthewaytheyareexpressedshallnotconstrainthemethodofimplementingthetest.NOTE:Attentionisdrawntotheissueofmeasurementuncertaintywhichmaybeaddressedinfuturedocuments.Notalltherequiredtestresultsmakeallowanceforspuriouseventsduringtesting(e.g.errorsduetoEMCeffects),whichmaymakeitnecessarytorepeatatest.Thetestconfigurationsgivendonotimplyaspecificrealizationofthetestequipmentortestarrangement,ortheuseofspecifictestdevices.However,anytestconfigurationusedshallprovidethosetestconditionsspecifiedunder"interfacestate","stimulus"and"monitor"foreachindividualtest.Thetestequipmentshallbeadevice,orgroupofdevices,thatiscapableofgeneratingastimulussignalconformingtothepresentdocumentandcapableofmonitoringthesignalreceivedfromthenetworkinterface.A.1.1EquipmentconnectionTheleasedlineinterfacemaybesuppliedwitheitherasocketorasetofcontactssuitableforterminationofsolidconductors.Testingshallbeperformedatthesocketorcontactpointsasthisisthepointatwhichcompliancewiththepresentdocumentisrequired.A.1.2ReferenceimpedanceWherethetestdefinestheuseofthereferenceimpedance(ZR),thisshallbeacompleximpedancemadeupofaresistanceof270Ωinserieswithaparallelcombinationof750Ωand150nF.ThisisshowninfigureA.1.SpecificrealizationsofthereferenceimpedancerequiredfortheperformanceofthetestsshallhaveareturnlossagainstZRof40dBoverthefrequencyrange300Hzto3400Hz.270Ω750Ω150nFFigureA.1:ReferenceimpedanceZRSIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)18A.1.3Non-reactivelineterminationForallthetestsspecifiedinthisannex,exceptthetestsforrandomcircuitnoise(clauseA.2.6),singletoneinterference(clauseA.2.10)andreturnloss(clauseA.2.14),anon-reactivelineterminationof600Ωisused.Inthetestforrandomcircuitnoiseandthetestforsingletoneinterference,bothimpedancesareusedasthetestsassumenon-reactivelineterminationsintheinstrumentation.Wherealineterminationof600Ωisspecified,thisshallbeanon-reactiveresistanceof600Ω±0,25%.A.1.4MeasurementfrequencyManyoftherequirementsspecifyatestsignalfrequencyof1020Hz.Wherethisisthecase,thespecifiedreferencefrequencytoleranceshallbe-7Hzto+2Hz(range1013Hzto1022Hz).A.2TestmethodsA.2.1OveralllossRequirement:Clauses4.1.2and4.1.7.2.Purpose:Todeterminetheoveralllossoftheleasedline.Testconfiguration:Atestsenderisconnectedtooneinterfaceoftheleasedline.Alevelmeterisconnectedtothefarendinterfaceoftheleasedlinewhichisterminatedin600Ω.SeefigureA.2.Thetestisrepeatedintheotherdirection.TESTSENDERLEVELMETERNearendFarendCONNECTIONFigureA.2:OveralllossConnectionstate:Available.Stimulus:Thetestsender,withanimpedanceof600Ω,issettosendasinglesignalfrequency1020Hzintoaloadimpedanceof600Ωatapowerlevelof-9dBm.Theloadimpedanceisthendisconnectedandthesignalappliedtooneinterfaceoftheleasedline.Monitor:Thepowerlevelismeasuredatthefarendoftheleasedlinewithaterminatingimpedanceof600Ω.Result:Theoverallloss,whichisthedifferencebetween-9dBmandthemeasuredoutputpower,shallbeasdefinedinclause4.1.2.NOTE:Forthepurposesofcheckingtherequirementofclause4.1.7.2thetestresultmayberecordedeverytimethetestisperformedduringthelifetimeoftheleasedlineandtherecordcheckedfordeviationfromthelimitssetinclause4.1.7.2.SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)19A.2.2Loss/frequencydistortionandmaximummeaninputpowerRequirement:Clauses4.1.3and4.1.4.1.Purpose:Tochecktheloss/frequencydistortionoftheleasedlineoverthebandwidth300Hzto3600Hz.Thistestalsoservestochecktherequirementformaximummeaninputpowerhandlingcapacityoftheleasedlineinterfaceoverthebandwidth300Hzto3400Hz.Testconfiguration:Atestsenderisconnectedtooneinterfaceoftheleasedline.Atestreceiverisconnectedtothefarendinterfaceoftheleasedlinewhichisterminatedin600Ω.SeefigureA.3.TESTSENDERLEVELMETERNearendFarendCONNECTIONFigureA.3:Loss/frequencydistortionandmaximummeaninputpowerConnectionstate:Available.Stimulus:Thetestsender,withanimpedanceof600Ω,issettosendasignalatanumberoffrequencieswithintherange300Hzto3600Hzintoaloadimpedanceof600Ωatapowerlevelof-9dBm.Ateachfrequency,inturn,theloadimpedanceisdisconnectedandthesignalappliedtooneinterfaceoftheleasedline.Monitor:Thepowerlevelismeasuredatthefarendoftheleasedlinewithaterminatingimpedanceof600Ω.Result:RelativetothereceivedlevelmeasuredinclauseA.2.1,thereceivedlevelsatotherfrequenciesshallbewithinthelimitsdefinedbytable2andfigure1.A.2.3MaximuminstantaneouspowerRequirement:Clause4.1.4.2.Purpose:Toverifythattheleasedlinecancarryasignalcorrespondingtothepeakvalueofa+4dBmsignalattheinput.Asinewaveof1020Hz,atalevelequivalentto+4dBm,istransmittedintotheleasedlineforadurationofnomorethan100ms.Thereshouldbenoclippingattheoutput.Testconfiguration:SeefigureA.4.TESTSENDERMONITORINGEQUIPMENTNearendFarendCONNECTIONFigureA.4:MaximuminstantaneouspowerConnectionstate:Available.Stimulus:Thetestsender,withanimpedanceof600Ω,issettosendasinewaveoffrequency1020Hz,atalevelof+4dBm,intotheinputoftheleasedline,withadurationofnomorethan100ms.SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)20Monitor:Thesignalacrossaterminationimpedanceof600Ωatthefarendoftheleasedline.Result:Thereshallbenoclippingofthesignalattheoutputoftheleasedline.A.2.4GroupdelaydistortionRequirement:Clause4.1.6.Purpose:Tocheckgroupdelaydistortionoftheleasedline.Testconfiguration:AmeasuringsettothespecificationofITU-TRecommendationO.81[2]isconnectedwiththetransmitteratoneendoftheconnectiontobemeasured,andthereceiverisconnectedtotheotherendoftheconnection.SeefigureA.5.TESTSENDERTESTRECEIVERNearendFarendCONNECTIONFigureA.5:GroupdelaydistortionConnectionstate:Available.Stimulus:Modulated,identified,referenceandmeasurementfrequencysignal,asdescribedinITU-TRecommendationO.81[2].Monitor:Thegroupdelay.Result:Thegroupdelayshallbewithintherangespecifiedinclause4.1.6.A.2.5AmplitudehitsRequirement:Clause4.1.7.1Purpose:Tochecktheleasedlineforamplitudehits.Testconfiguration:PerformedusinganinstrumentcomplyingwithITU-TRecommendationO.95[4].Thetransmitter(testsender)isconnectedtooneinterfaceofthecircuitundertestandthereceiverisconnectedtotheotherinterface.SeefigureA.6.TESTSENDERTESTRECEIVERNearendFarendCONNECTIONFigureA.6:AmplitudehitsConnectionstate:Available.Stimulus:Thetransmitter,withanimpedanceof600Ω,issettosendatapowerlevelof-9dBmatafrequencyof1020Hz.Monitor:Thenumberofamplitudehitsgreaterthan±2dBwithadurationof4msorgreaterforaperiodof15minutes.Slowamplitudechanges,asdefinedinITU-TRecommendationO.95[4],shallnotbecounted.SIST EN 300 449 V1.2.1:2004
ETSIETSIEN300449V1.2.1(2001-07)21Result:Thenumberofamplitudehitsshallbewithinthelimitsspecifiedinclause4.1.7.1.NOTE:Thecontributionofthereturnconnection,ifany,totheresultmaybeestimatedfromtheresultsofanumberoftestsoverdifferentleasedlinesusingthesamereturnconnectionineachcase.A.2.6RandomcircuitnoiseRequirement:Clause4.1.8.Purpose:Tomeasuretherandomcircuitnoiseoftheleasedlineconnection.Testconfiguration:PerformedusingapsophometercomplyingwithITU-TRecommendationO.41[7].Withthefarendinterfaceoftheleasedlineterminatedwiththereferenceimpedance,thepsophometerisconnectedtothenearendinterface.SeefigureA.7.NearendFarendPSOPHOMETERZRCONNECTIONFigureA.7:RandomcircuitnoiseConnectionstate:Available.Stimulus:None.Monitor:Thepsophometricallyweightednoisesignalacrossthe600Ωterminationatthenearendinterfaceoftheleasedline.NOTE:Thepsophometerterminatesthenearendofthelinewithitsowninternal600Ωtermination.Result:Thereadingsobtainedshallbewithinthelimitsspecifiedinclause4.1.8.A.2.7ImpulsivenoiseRequirements:Clause4.1.9.Purpose:Tochecktheimpulsivenoiseperformanceoftheleasedlineconnection.Testconfiguration:Perform
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