SIST EN 300 453 V1.2.1:2004

• Abstract:

  Specification of the terminal equipment side of the interface and test procedures for compliance. Revision of ETS 300 453 to improve the safety related text following a liaison received from TC Safety.

• 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-147-2
• Ref Project: ETSI EN 300 453 V1.2.1 (2001-07) - Access and Terminals (AT); Ordinary and Special quality voice bandwidth 4-wire analogue leased lines (A4O and A4S); Terminal equipment interface

SIST EN 300 453 V1.2.1:2004 is an ETSI European Standard for the terminal equipment interface used with Open Network Provision (ONP) ordinary quality and special quality voice bandwidth 4-wire analogue leased lines, known as A4O and A4S. It specifies the physical and electrical characteristics of that interface, together with test principles for compliance, for equipment intended to connect to those leased lines.

What does SIST EN 300 453 V1.2.1:2004 specify?

SIST EN 300 453 V1.2.1:2004 specifies the terminal equipment side of the interface to ONP ordinary quality and special quality voice bandwidth 4-wire analogue leased lines. It focuses on compatibility with the leased line interface and on test methods for checking compliance.

The document excludes customer premises wiring and installation between the terminal equipment and the Network Termination Point (NTP). It also places safety, overvoltage and ElectroMagneticCompatibility (EMC) outside its scope.

Annex	What it covers
Annex A	Normative test methods for compliance checks
Annex B	Informative bibliography

The main body is organized into scope, references, definitions and abbreviations, and requirements. Clause 4 covers physical characteristics, electrical characteristics, safety, overvoltage and EMC.

What are the key requirements of SIST EN 300 453 V1.2.1:2004?

SIST EN 300 453 V1.2.1:2004 sets connection, signal and interference limits for terminal equipment that plugs into the leased line interface. In practice, it tells the manufacturer what the port must look like electrically and how to prove it in test.

Physical connection

Clause 4.1 requires the terminal equipment to provide one or more defined connection methods, including an 8-contact plug, connection contacts, or a wiring arrangement with solid wire conductors in the stated diameter range. This matters because the equipment must mate with the expected leased line presentation.

Return loss

Clause 4.2.1 requires return loss to meet a minimum value across 200 Hz to 4000 Hz when tested against the reference impedance. This controls impedance matching, which helps avoid reflections that can distort speech or data.

Longitudinal conversion loss

Clause 4.2.2 sets minimum longitudinal conversion loss values across the voice band. In practice, this limits unwanted conversion of common-mode interference into usable signal, which helps the equipment work on lines with high longitudinal voltages.

Transmission signals

Clause 4.2.3 splits terminal equipment into categories for acoustic input, internally generated electrical signals, and through-connection from another electrical interface. The clause then limits Sending Loudness Rating (SLR), maximum mean power, peak voltage, and maximum power in a 10 Hz bandwidth, including a special limit for Dual Tone Multi-Frequency (DTMF) tones. This keeps normal speech and signalling within levels that the leased line can carry safely.

Out-of-band emissions

Clause 4.2.4 limits maximum sending power above 4.3 kHz up to 2 MHz when the equipment is in normal operation. This matters because unwanted high-frequency energy can disturb other circuits or indicate poor filtering.

Power feeding

Clause 4.2.5 says the terminal equipment interface shall not feed power to the network interface and shall not require power from it. For the reader, this means the interface is a signal interface, not a powered line interface.

Safety, overvoltage and EMC

Clauses 4.3 to 4.5 state that safety, overvoltage and EMC requirements are outside the scope of this document. Those topics are handled by other standards.

What terms does SIST EN 300 453 V1.2.1:2004 define?

• leased lines - Telecommunications facilities provided by a public telecommunication network with defined transmission characteristics between Network Termination Points.
• Network Termination Point (NTP) - The physical network connection point and its technical access specification at the public network boundary.
• terminal equipment - Equipment intended to connect to the public telecommunication network and send, process or receive information.
• voice bandwidth - The frequency range from 300 Hz to 3400 Hz.
• reference impedance ZR - The 600 Ω reference impedance used in the electrical tests.
• Sending Loudness Rating (SLR) - A loudness measure used for equipment with an acoustic input.
• Dual Tone Multi-Frequency (DTMF) - The tone signalling used for digits on telephony equipment.

Who uses SIST EN 300 453 V1.2.1:2004?

SIST EN 300 453 V1.2.1:2004 is used by terminal equipment manufacturers, test laboratories, conformity assessors, telecom engineers and procurement teams. They use it to design interfaces, set up type tests, verify leased line compatibility, and write technical acceptance criteria for equipment connected to A4O and A4S lines.

What changed in SIST EN 300 453 V1.2.1:2004 from the previous edition?

SIST EN 300 453 V1.2.1:2004 revises ETS 300 453. The scope says this revision improves the safety-related text following a liaison received from TC Safety.

Which standards are used with SIST EN 300 453 V1.2.1:2004?

• ISO/IEC 8877 - Provides the 8-contact plug and contact assignment used for one of the connection methods.
• ITU-T Recommendation P.56 - Supports the measurement method for active speech level in mean power testing.
• ITU-T Recommendation P.64 - Supports the sendingsensitivity measurement used to derive SLR.
• EN 300 451 - Gives the connection characteristics and network interface presentation for ordinary quality voice bandwidth 4-wire analogue leased lines.
• EN 300 452 - Gives the connection characteristics and network interface presentation for special quality voice bandwidth 4-wire analogue leased lines.
• ETS TBR 17 - Is identified as a subset of this terminal equipment interface specification.

What does the SIST EN 300 453 V1.2.1:2004 document contain?

The document contains the interface requirements in Clause 4 and the compliance test methods in Annex A. Annex A includes test set-ups, reference and terminating impedances, stimulus conditions, monitoring methods and result checks for return loss, longitudinal conversion loss, SLR, maximum mean power, peak voltage, 10 Hz bandwidth power, out-of-band power and power feeding.

It also includes figures for the test configurations and limit curves, plus tables for frequency-dependent limits and SLR weighting data. Annex B provides background bibliography items for related directives, ITU-T recommendations, ETSI standards and safety documents.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.HUPLQDOVNHRSUHPHAccess and Terminals (AT); Ordinary and Special quality voice bandwidth 4-wire analogue leased lines (A4O and A4S); Terminal equipment interface33.040.50Vodi, zveze in tokokrogiLines, connections and circuitsICS:Ta slovenski standard je istoveten z:EN 300 453 Version 1.2.1SIST EN 300 453 V1.2.1:2004en01-oktober-2004SIST EN 300 453 V1.2.1:2004SLOVENSKI
STANDARD
ETSIEN300453V1.2.1(2001-07)EuropeanStandard(Telecommunicationsseries)AccessandTerminals(AT);OrdinaryandSpecialqualityvoicebandwidth4-wireanalogueleasedlines(A4OandA4S);TerminalequipmentinterfaceSIST EN 300 453 V1.2.1:2004

ETSIETSIEN300453V1.2.1(2001-07)2ReferenceREN/AT-010006KeywordsONP,leasedlineETSI650RoutedesLuciolesF-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 300 453 V1.2.1:2004

ETSIETSIEN300453V1.2.1(2001-07)3ContentsIntellectualPropertyRights.4Foreword.4Introduction.51Scope.62References.63Definitionsandabbreviations.63.1Definitions.63.2Abbreviations.74Requirements.74.1Physicalcharacteristics.74.2Electricalcharacteristics.84.2.1Returnloss.84.2.2Longitudinalconversionloss.84.2.3Transmissionsignals.94.2.3.1Equipmentwithanacousticinput.104.2.3.1.1SendingLoudnessRating(SLR).104.2.3.2Equipmentwithinternallygeneratedelectricalsignals.104.2.3.2.1Maximummeanpower.104.2.3.2.2Maximuminstantaneouspower(peakvoltage).104.2.3.2.3Maximumpowerina10Hzbandwidth.104.2.3.3Equipmentwithanelectricalinput.114.2.4Maximumsendingpowerabove4,3kHz.114.2.5Powerfeeding.124.3Safety.124.4Overvoltage.124.5ElectroMagneticCompatibility(EMC).13AnnexA(normative):Testmethods.14A.1General.14A.1.1Equipmentconnection.14A.1.2Referenceimpedance.14A.1.3Non-reactivetermination.14A.2Testmethods.15A.2.1Returnloss.15A.2.2Longitudinalconversionloss.16A.2.3SendingLoudnessRating(SLR).17A.2.4Maximummeanpower.18A.2.5Maximuminstantaneouspower(peakvoltage).19A.2.6Maximumpowerina10Hzbandwidth.20A.2.7Maximumsendingpowerabove4,3kHz.21A.2.8Powerfeeding.22AnnexB(informative):Bibliography.23History.24SIST EN 300 453 V1.2.1:2004

ETSIETSIEN300453V1.2.1(2001-07)4IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.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).Therearetwootherstandardsdirectlyrelatedtothepresentdocument:-EN300451:"AccessandTerminals(AT);Ordinaryqualityvoicebandwidth4-wireanalogueleasedline(A4O);Connectioncharacteristicsandnetworkinterfacepresentation".-EN300452:"AccessandTerminals(AT);Specialqualityvoicebandwidth4-wireanalogueleasedline(A4S);Connectioncharacteristicsandnetworkinterfacepresentation".ThepresentdocumentisbasedoninformationfromITU-TRecommendationsandETSIpublicationsandtherelevantdocumentsarequotedwhereappropriate.NationaltranspositiondatesDateofadoptionofthisEN:29June2001DateoflatestannouncementofthisEN(doa):30September2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31March2002DateofwithdrawalofanyconflictingNationalStandard(dow):31March2002SIST EN 300 453 V1.2.1:2004

ETSIETSIEN300453V1.2.1(2001-07)5IntroductionTheCouncilDirectiveontheapplicationofONPtoleasedlines(92/44/EEC),concernstheharmonizationofconditionsforopenandefficientaccessto,anduseof,theleasedlinesprovidedoverpublictelecommunicationsnetworksandtheavailabilitythroughouttheEuropeanUnion(EU)ofaminimumsetofleasedlineswithharmonizedtechnicalcharacteristics.TheconsequenceoftheDirectiveisthattelecommunicationsorganizationswithintheEUshallmakeavailableasetofleasedlineswithinandbetweenpointsinthesecountrieswithspecifiedconnectioncharacteristicsandspecifiedinterfaces.Twocategories(voluntaryandregulatory)ofstandardwereusedfortheinterfacesofterminalequipmentdesignedforconnectiontotheONPleasedlines.TechnicalBasisforRegulations(TBRs)gavetheearlieressentialrequirementsundertheDirective91/263/EEC,laterreplacedby98/13/EC,forattachmenttotheleasedlines,whereasothervoluntarystandards(ETSsorENs)gavethefulltechnicalspecificationsfortheseinterfaces.Thepresentdocument,whichisbasedonanearlierETS,belongstothesecondcategory.TherequirementsofTBR17areasubsetofthepresentdocument.Thepresentversionofthepresentdocumenthasbeenproducedtointroducesomenecessarychanges.ITU-TRecommendationsM.1020andM.1040wereusedasthebasisfortheleasedlinestandardstowhichthisterminalequipmentinterfacerelates.SIST EN 300 453 V1.2.1:2004

ETSIETSIEN300453V1.2.1(2001-07)61ScopeThepresentdocumentspecifiesthephysicalandelectricalcharacteristics(exceptsafety,overvoltageandEMCaspects)andcorrespondingtestprinciplesforaterminalequipmentinterfaceforconnectiontothenetworkterminationpointsofOpenNetworkProvision(ONP)ordinaryqualityorspecialqualityvoicebandwidth4-wireanalogueleasedlinesdefinedbyEN300451andEN300452.ThepresentdocumentiswrittenonlytoensurethattheinterfaceoftheterminalequipmentiscompatiblewiththeONPordinaryqualityorspecialqualityvoicebandwidth4-wireanalogueleasedline.Itisapplicabletoallinterfacesdesignedforconnectiontotheseleasedlines,howeverinthecasesofapparatusthatcarriesaparticularservice,ofcomplexapparatusandofapparatusinprivatenetworks,otherrequirementsmayapplyinadditiontothepresentdocument.CustomerpremiseswiringandinstallationbetweentheterminalequipmentandtheNetworkTerminationPoint(NTP)areoutsidethescopeofthepresentdocument.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublicationand/oreditionnumberorversionnumber)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ISO/IEC8877(1992):"Informationtechnology.Telecommunicationsandinformationexchangebetweensystems.InterfaceconnectorandcontactassignmentsforISDNBasicAccessInterfacelocatedatreferencepointsSandT".[2]ITU-TRecommendationP.56(1993):"Objectivemeasurementofactivespeechlevel".[3]ITU-TRecommendationP.64(1999):"Determinationofsensitivity/frequencycharacteristicsoflocaltelephonesystems".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:leasedlines:telecommunicationsfacilitiesprovidedbyapublictelecommunicationnetworkthatprovidedefinedtransmissioncharacteristicsbetweennetworkterminationpointsandthatdonotincludeswitchingfunctionsthattheusercancontrol,(e.g.on-demandswitching)NetworkTerminationPoint(NTP):allphysicalconnectionsandtheirtechnicalaccessspecificationswhichformpartofthepublictelecommunicationnetworkandarenecessaryforaccesstoandefficientcommunicationthroughthatpublicnetworkreferenceimpedanceZR:thisis600Ω.SeealsoclauseA.1.2SIST EN 300 453 V1.2.1:2004

ETSIETSIEN300453V1.2.1(2001-07)7terminalequipment:equipmentintendedtobeconnectedtothepublictelecommunicationnetwork,i.e.:-tobeconnecteddirectlytotheterminationofapublictelecommunicationnetwork;or-tointerworkwithapublictelecommunicationnetworkbeingconnecteddirectlyorindirectlytotheterminationofapublictelecommunicationnetwork,inordertosend,process,orreceiveinformationvoicebandwidth:bandoffrequenciesovertherange300Hzto3400Hz3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:aReturnlossDTMFDualToneMulti-FrequencyEMCElectroMagneticCompatibilityNTPNetworkTerminationPointONPOpenNetworkProvisionpmSoundpressureatthemouthreferencepoint(usedinthecalculationofSLR)rmsrootmeansquareRXRXisasignalinput(ateithertheterminalequipmentorthetestequipment,seefigure1)SLRSendingLoudnessRatingSmJSendingsensitivity(usedinthecalculationofSLR)SmJnSendingsensitivityatfrequencyfn(usedinthecalculationofSLR)TXTXisasignaloutput(ateithertheterminalequipmentorthetestequipment,seefigure1)WsnSendingweightingfactor(usedinthecalculationofSLR)ZRReferenceimpedanceZTTerminatingimpedance4Requirements4.1PhysicalcharacteristicsRequirement:Theterminalequipmentshallprovideoneormoreofthefollowingconnectionmethods:a)an8-contactplugofthetypespecifiedinISO/IEC8877[1]withcontactassignmentsasspecifiedintable1;b)asetofconnectioncontacts(e.g.aninsulationdisplacementconnectororscrewterminalblock)towhichsolidconductorswithdiametersintherange0,4mmto0,6mmmaybeconnected;c)awiringarrangementconnectedbyanymeanstotheterminalequipment,withunterminatedsolidwireconductorswithdiametersintherange0,4mmto0,6mmatthedistantendfromtheterminalequipment.Wherea)andc)areprovided,thesemaybedetachablebytheusersuchthatonlyoneisconnectedtotheterminalequipmentatanytime.NOTE:Thenormalpresentationoftheleasedlineisbymeansofasocket.SIST EN 300 453 V1.2.1:2004

ETSIETSIEN300453V1.2.1(2001-07)8Table1:ContactassignmentContactnumberTerminalequipment1Unused2Unused3&6Transmitpair(Outputport)4&5Receivepair(Inputport)7Unused8UnusedNOTE:Thetransmitpairistheoutputfromtheterminalequipment.Thereceivepairistheinputtotheterminalequipmentasshowninfigure1.Wheretheterms"output"and"input"areusedwithoutqualificationinthepresentdocument,theyrefertotheterminalequipmentinterface.TXRXRXTXTERMINALEQUIPMENTINTERFACENETWORKINTERFACEOUTPUTINPUTINPUTOUTPUTFigure1:LeasedlineconfigurationconventionsTest:Thereshallbeavisualinspectionthatoneormoreoftheconnectionmethodsareprovided.ThecontactassignmentsandconnectionmethodsaretestedindirectlythroughthetestsinannexA.4.2ElectricalcharacteristicsTherequirementsofclause4.2applyonlyintheintendedoperatingstateoftheterminalequipment.4.2.1ReturnlossRequirement:Thereturnlossoftheimpedanceoftheinputandoutputportsoftheterminalequipmentinterfacewithrespecttothereferenceimpedance,inthefrequencyrange200Hzto4000Hz,shallbegreaterthanorequalto8dBthroughouttherangewhentestedusingastimulussignalatavoltageequivalenttothatofasignalpowerof-13dBmat1020Hz.Test:ThetestshallbeconductedaccordingtoclauseA.2.1.4.2.2LongitudinalconversionlossRequirement:Thelongitudinalconversionlossoftheinputandoutputportsoftheterminalequipmentinterfaceshallbegreaterthanorequaltothevaluesgivenintable2andfigure2.NOTE:Thelongitudinalconversionlossspecifiestheunwantedtransversesignaldetectedbytheterminalequipmentwhenalongitudinalsignalisappliedequallytotheterminalsoftheinterface.Certainnetworksmayhavehighlongitudinalsignallevels(e.g.65Vrootmeansquare(rms));inthiscase,ahigherlongitudinalconversionlossmaybenecessarytoensureadequateoperationoftheterminalequipment.SIST EN 300 453 V1.2.1:2004

ETSIETSIEN300453V1.2.1(2001-07)9Table2:Longitudinalconversionloss,minimumvaluesFrequencyrangeMinimumvalue300Hzto600Hz40dB600Hzto3400Hz46dB60010003400FrequencyHz1020304050300LongitudinalconversionlossdB4640020005000500Figure2:Longitudinalconversionloss,minimumvaluesTest:ThetestshallbeconductedaccordingtoclauseA.2.2.4.2.3TransmissionsignalsThesourceandnatureoftheoutputsignalfromtheterminalequipmentinterfacecanbeclassifiedinseveraldifferentwaysthusdividingtheterminalequipmentsintoseveralnon-exclusivecategories.Onetypeofterminalequipmentmaythereforeneedtobetreatedasamemberofmorethanoneofthecategories.Forthepurposesofthepresentdocumentthegeneralcategoriesrequiringidentificationaredefinedasfollows:a)anyterminalequipmentwheretheoutputsignalisderivedinrealtimefromanintegralacousticinterface.Seeclause4.2.3.1;b)anyterminalequipmentwheretheoutputsignalisgeneratedelectricallywithintheterminalequipment.Seeclause4.2.3.2;c)anythroughconnectingterminalequipmentwheretheoutputsignalisderivedfromanotherelectricalinterface.Seeclause4.2.3.3.NOTE:Terminalequipmentsmaybelongtomorethanonecategory.Atelephonemaybeinbothcategorya)fortelephonyandcategoryb)forthegenerationofDualToneMulti-Frequency(DTMF)tones.Afunctionforgeneratingsyntheticorrecordedspeechormusic,suchasisfoundinansweringmachinesorvoicemail,isincludedincategoryb).SIST EN 300 453 V1.2.1:2004

ETSIETSIEN300453V1.2.1(2001-07)104.2.3.1Equipmentwithanacousticinput4.2.3.1.1SendingLoudnessRating(SLR)Requirement:TheminimumSLRoftheterminalequipment,whenterminatedwiththereferenceimpedanceZR,shallbegreaterthanorequalto-1dB.NOTE:TheminimumSLRvalueof-1dBreferstotheactualmeasuredvalueratherthanthenominalvalue,i.e.thereisnotoleranceonthespecifiedvalue,andhasbeenspecifiedtoensurenoharmtothenetwork.Itisrecommendedthatfornormaloperation,theSLRshouldbegreaterthanorequalto+2dB.Test:ThetestshallbeconductedaccordingtoclauseA.2.3.4.2.3.2Equipmentwithinternallygeneratedelectricalsignals4.2.3.2.1MaximummeanpowerRequirement:Themeanpowerlevelinthefrequencyrange200Hzto3800Hzinanyoneminuteperiodshallbenotgreaterthan-13dBmwhentheterminalequipmentinterfaceisterminatedwiththereferenceimpedanceZR.Test:ThetestshallbeconductedaccordingtoclauseA.2.4.4.2.3.2.2Maximuminstantaneouspower(peakvoltage)Themaximuminstantaneouspowerisexpressedintermso
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