SIST EN 300 450 V1.2.1:2004

• Abstract:

  Specification of the terminal equipment side of the interface and test procedures for compliance. Revision of ETS 300 450 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 300 450 V1.2.1 (2001-07) - Access and Terminals (AT); Ordinary and Special quality voice bandwidth 2-wire analogue leased lines (A2O and A2S); Terminal equipment interface

SIST EN 300 450 V1.2.1:2004 is the SIST adoption of the ETSI European Standard for Access and Terminals (AT) terminal equipment interfaces on ordinary quality and special quality voice bandwidth 2-wire analogue leased lines (A2O and A2S). It specifies the terminal equipment side of the interface and the test procedures used to check compliance for equipment intended to connect to the Network Termination Point (NTP).

What does SIST EN 300 450 V1.2.1:2004 specify?

SIST EN 300 450 V1.2.1:2004 defines the physical and electrical characteristics of the terminal equipment interface for ONP leased lines, together with the associated compliance tests. The focus is compatibility at the terminal equipment interface, not the full leased-line service.

The standard applies to interfaces intended for connection to the NTP of ONP ordinary quality or special quality voice bandwidth 2-wire analogue leased lines. Customer premises wiring and installation between the terminal equipment and the NTP are outside its scope. Safety, overvoltage and EMC aspects are excluded from the technical requirements.

The document is organized into scope, references, definitions and abbreviations, requirements, Annex A test methods, and Annex B bibliography.

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

What are the key requirements of SIST EN 300 450 V1.2.1:2004?

The requirements in clause 4 apply only when the terminal equipment is in its intended operating state. In practice, that means the equipment is assessed as it is meant to be used, not only in an idle bench condition.

Connection and interface presentation

SIST EN 300 450 V1.2.1:2004 requires the terminal equipment to provide one or more specified connection methods, including an 8-contact plug, connection contacts, or a wiring arrangement with solid conductors of the stated size range. This matters because the equipment must present a usable and recognizable physical interface for the leased line.

Clause 4.1 also links the contact assignments to Table 1, and Annex A says testing uses the connection method preferred by the supplier when more than one is provided.

Electrical performance in the speech band

SIST EN 300 450 V1.2.1:2004 sets return loss and longitudinal conversion loss requirements for the speech-frequency range, measured against the reference impedance ZR. These checks are there to confirm that the interface does not reflect too much signal and does not turn common-mode interference into unwanted wanted signal.

For equipment with an acoustic input, clause 4.2.3.1.1 requires a minimum Sending Loudness Rating (SLR). For equipment with an electrical input derived from another interface, clause 4.2.3.3 places no level requirement on the output in the voice band, because the signal originates elsewhere.

Output power limits and out-of-band behaviour

SIST EN 300 450 V1.2.1:2004 limits internally generated electrical signals by mean power, peak voltage and power in a 10 Hz bandwidth. That combination is meant to control normal speech-like output, short tone bursts and narrowband emissions, including DTMF tones.

Clause 4.2.4 extends the control above the voice band. The equipment must keep sending power below the stated out-of-band limits, and any single-frequency components during special cases such as DTMF remain bounded. In practice, this helps avoid unwanted interference outside the intended voice channel.

Power feeding

SIST EN 300 450 V1.2.1:2004 requires the terminal equipment interface not to feed power to the network interface and not to require power from it. This matters for attachment design and test planning, because the interface is treated as a signal interface, not a powering interface.

What terms does SIST EN 300 450 V1.2.1:2004 define?

• Leased lines - Public-network facilities that provide defined transmission characteristics between network termination points without user-controlled switching.
• Network Termination Point (NTP) - The physical network boundary and its technical access specifications where public-network access is presented.
• Terminal equipment - Equipment intended to connect to the public telecommunication network, directly or through interworking.
• Reference impedance (ZR) - The complex impedance used as the test reference for return loss, SLR and power measurements.
• Sending Loudness Rating (SLR) - A measure of the send level of equipment with an acoustic input, derived from acoustic test measurements.
• Open Network Provision (ONP) - The regulatory framework for harmonized access to leased lines over public telecommunications networks.
• ElectroMagnetic Compatibility (EMC) - The immunity and emission area that the document keeps outside its own technical requirements.

Who uses SIST EN 300 450 V1.2.1:2004?

SIST EN 300 450 V1.2.1:2004 is used by terminal equipment manufacturers, test laboratories, conformity assessment teams, network operators and technical buyers who need compatible attachment to ONP leased lines. It is relevant for equipment such as telephones, data equipment like modems, answering machines and through-connecting terminal equipment.

What changed in SIST EN 300 450 V1.2.1:2004 from the previous edition?

SIST EN 300 450 V1.2.1:2004 is a revision of ETS 300 450. The scope states that the revision improves the safety-related text following a liaison from TC Safety.

Which standards are used with SIST EN 300 450 V1.2.1:2004?

• ISO/IEC 8877 - Defines the 8-contact plug type and contact assignments used for one connection method.
• ITU-T Recommendation P.56 - Provides the active speech level measurement method used for maximum mean power testing.
• ITU-T Recommendation P.64 - Provides the sensitivity and frequency-characteristic method used for SLR testing.
• ETSI EN 300 448 - Gives the connection characteristics and network interface presentation for A2O.
• ETSI EN 300 449 - Gives the connection characteristics and network interface presentation for A2S.

What does the SIST EN 300 450 V1.2.1:2004 document contain?

The document contains one main requirements clause and Annex A with the test methods that verify each requirement. Clause 4 includes the physical connection rules, the electrical limits for return loss, longitudinal conversion loss, send level, output power and power feeding, plus the scope exclusions for safety, overvoltage and EMC.

Annex A gives the measurement set-ups for return loss, longitudinal conversion loss, SLR, maximum mean power, peak voltage, 10 Hz bandwidth power, out-of-band power above 4.3 kHz and power feeding. It also defines the reference impedance and the non-reactive termination used in testing.

The clause tables and figures provide the presentation and limit information used during compliance checking, while Annex B gives background references for the technical area.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.HUPLQDOVNHRSUHPHAccess and Terminals (AT); Ordinary and Special quality voice bandwidth 2-wire analogue leased lines (A2O and A2S); Terminal equipment interface33.040.50Vodi, zveze in tokokrogiLines, connections and circuitsICS:Ta slovenski standard je istoveten z:EN 300 450 Version 1.2.1SIST EN 300 450 V1.2.1:2004en01-oktober-2004SIST EN 300 450 V1.2.1:2004SLOVENSKI
STANDARD
ETSIEN300450V1.2.1(2001-07)EuropeanStandard(Telecommunicationsseries)AccessandTerminals(AT);OrdinaryandSpecialqualityvoicebandwidth2-wireanalogueleasedlines(A2OandA2S);TerminalequipmentinterfaceSIST EN 300 450 V1.2.1:2004

ETSIETSIEN300450V1.2.1(2001-07)2ReferenceREN/AT-010003KeywordsONP,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 300 450 V1.2.1:2004

ETSIETSIEN300450V1.2.1(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.94.2.3.1.1SendingLoudnessRating(SLR).94.2.3.2Equipmentwithinternallygeneratedelectricalsignals.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.15A.2Testmethods.15A.2.1Returnloss.15A.2.2Longitudinalconversionloss.16A.2.3SendingLoudnessRating.17A.2.4Maximummeanpower.18A.2.5Maximuminstantaneouspower(peakvoltage).19A.2.6Maximumpowerina10Hzbandwidth.19A.2.7Maximumsendingpowerabove4,3kHz.20A.2.8Powerfeeding.21AnnexB(informative):Bibliography.22History.23SIST EN 300 450 V1.2.1:2004

ETSIETSIEN300450V1.2.1(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:-EN300448:"AccessandTerminals(AT);Ordinaryqualityvoicebandwidth2-wireanalogueleasedline(A2O);Connectioncharacteristicsandnetworkinterfacepresentation".-EN300449:"AccessandTerminals(AT);Specialqualityvoicebandwidth2-wireanalogueleasedline(A2S);Connectioncharacteristicsandnetworkinterfacepresentation".ThepresentdocumentisbasedoninformationfromITU-TRecommendationsandETSIpublicationsandtherelevantdocumentsarequotedwhereappropriate.NationaltranspositiondatesDateofadoptionofthisEN:29June2001DateoflatestannouncementofthisEN(doa):30September2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31March2002DateofwithdrawalofanyconflictingNationalStandard(dow):31March2002SIST EN 300 450 V1.2.1:2004

ETSIETSIEN300450V1.2.1(2001-07)5IntroductionTheCouncilDirectiveontheapplicationofONPtoleasedlines(92/44/EEC)concernstheharmonizationofconditionsforopenandefficientaccessto,anduseof,theleasedlinesprovidedoverpublictelecommunicationsnetworks,andtheavailabilitythroughouttheEuropeanUnion(EU)ofaminimumsetofleasedlineswithharmonizedtechnicalcharacteristics.TheconsequenceoftheDirectiveisthattelecommunicationsorganizationswithintheEUshallmakeavailableasetofleasedlineswithinandbetweenpointsinthesecountrieswithspecifiedconnectioncharacteristicsandspecifiedinterfaces.Twocategories(voluntaryandregulatory)ofstandardwereusedfortheinterfacesofterminalequipmentdesignedforconnectiontotheONPleasedlines.TechnicalBasisforRegulations(TBRs)gavetheearlieressentialrequirementsundertheDirective91/263/EEC,laterreplacedby98/13/EC,forattachmenttotheleasedlines,whereasothervoluntarystandards(ETSsorENs)gavethefulltechnicalspecificationsfortheseinterfaces.Thepresentdocument,whichisbasedonanearlierETS,belongstothesecondcategory.TherequirementsofTBR15areasubsetofthepresentdocument.Thepresentdocumenthasbeenproducedtointroducesomenecessarychanges.ITU-TRecommendationsM.1020andM.1040wereusedasthebasisfortheleasedlinestandardstowhichthisterminalequipmentinterfacerelates.SIST EN 300 450 V1.2.1:2004

ETSIETSIEN300450V1.2.1(2001-07)61ScopeThepresentdocumentspecifiesthephysicalandelectricalcharacteristics(exceptsafety,overvoltageandEMCaspects)andcorrespondingtestprinciplesforaterminalequipmentinterfaceforconnectiontothenetworkterminationpointsofOpenNetworkProvision(ONP)ordinaryqualityorspecialqualityvoicebandwidth2-wireanalogueleasedlinesdefinedbyEN300448[4]andEN300449[5].ThepresentdocumentiswrittenonlytoensurethattheinterfaceoftheterminalequipmentiscompatiblewiththeONPordinaryqualityorspecialqualityvoicebandwidth2-wireanalogueleasedline.Itisapplicabletoallinterfacesdesignedforconnectiontotheseleasedlines,howeverinthecasesofapparatusthatcarriesaparticularservice,ofcomplexapparatusandofapparatusinprivatenetworks,otherrequirementsmayapplyinadditiontothepresentdocument.CustomerpremiseswiringandinstallationbetweentheterminalequipmentandtheNTPareoutsidethescopeofthepresentdocument.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".[4]ETSIEN300448:"AccessandTerminals(AT);Ordinaryqualityvoicebandwidth2-wireanalogueleasedline(A2O);Connectioncharacteristicsandnetworkinterfacepresentation".[5]ETSIEN300449:"AccessandTerminals(AT);Specialqualityvoicebandwidth2-wireanalogueleasedline(A2S);Connectioncharacteristicsandnetworkinterfacepresentation".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:leasedlines:telecommunicationsfacilitiesprovidedbyapublictelecommunicationnetworkthatprovidedefinedtransmissioncharacteristicsbetweennetworkterminationpointsandthatdonotincludeswitchingfunctionsthattheusercancontrol,(e.g.on-demandswitching)NetworkTerminationPoint(NTP):allphysicalconnectionsandtheirtechnicalaccessspecificationswhichformpartofthepublictelecommunicationsnetworkandarenecessaryforaccesstoandefficientcommunicationthroughthatpublicnetworkSIST EN 300 450 V1.2.1:2004

ETSIETSIEN300450V1.2.1(2001-07)7referenceimpedanceZR:compleximpedancemadeupofaresistanceof270Ωinserieswithaparallelcombinationof750Ωand150nF.SeealsoclauseA.1.2terminalequipment:equipmentintendedtobeconnectedtothepublictelecommunicationnetwork;i.e.:-tobeconnecteddirectlytotheterminationofapublictelecommunicationnetwork;or-tointerworkwithapublictelecommunicationnetworkbeingconnecteddirectlyorindirectlytotheterminationofapublictelecommunicationnetwork,inordertosend,process,orreceiveinformation.voicebandwidth:bandoffrequenciesovertherange300Hzto3400Hz3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:aReturnlossindBdcdirectcurrentDTMFDualToneMulti-FrequencyEMCElectroMagneticCompatibilityNTPNetworkTerminationPointONPOpenNetworkProvisionpmSoundpressureatthemouthreferencepoint(usedinthecalculationofSLR)rmsrootmeansquareSLRSendingLoudnessRatingmjSSendingsensitivity(usedinthecalculationofSLR)mjnSSendingsensitivityatfrequencyfn(usedinthecalculationofSLR)snWSendingweightingfactor(usedinthecalculationofSLR)ZRReferenceimpedanceZTTerminationimpedance4Requirements4.1PhysicalcharacteristicsRequirement:Theterminalequipmentshallprovideoneormoreofthefollowingconnectionmethods:a)an8-contactplugofthetypespecifiedinISO/IEC8877[1]withcontactassignmentsasspecifiedintable1;b)asetofconnectioncontacts(e.g.aninsulationdisplacementconnectororscrewterminalblock)towhichsolidconductorswithdiametersintherange0,4to0,6mmmaybeconnected;c)awiringarrangementconnectedbyanymeanstotheterminalequipment,withunterminatedsolidwireconductorswithdiametersintherange0,4to0,6mmatthedistantendfromtheterminalequipment.Wherea)andc)areprovided,thesemaybedetachablebytheusersuchthatonlyoneisconnectedtotheterminalequipmentatanyonetime.NOTE:Thenormalpresentationoftheleasedlineisbymeansofasocket.SIST EN 300 450 V1.2.1:2004

ETSIETSIEN300450V1.2.1(2001-07)8Table1:ContactassignmentsContactnumberterminalequipment1Unused2Unused3Unused4&5Pair6Unused7Unused8UnusedTest:Thereshallbeavisualinspectionthatoneormoreoftheconnectionmethodsareprovided.ThecontactassignmentsandconnectionmethodsaretestedindirectlythroughthetestsinannexA.4.2ElectricalcharacteristicsTherequirementsofclause4.2applyonlyintheintendedoperatingstateoftheterminalequipment.4.2.1ReturnlossRequirement:Thereturnlossoftheimpedancepresentedbytheterminalequipmentinterfacewithrespecttothereferenceimpedance,inthefrequencyrange200Hzto4000Hz,shallbegreaterthanorequalto8dBthroughouttherangewhentestedusingastimulussignalatavoltageequivalenttothatofasignalpowerof-9dBmat1020Hz.Test:ThetestshallbeconductedaccordingtoclauseA.2.1.4.2.2LongitudinalconversionlossRequirement:Thelongitudinalconversionlossoftheterminalequipmentinterfaceshallbegreaterthanorequaltothevaluesgivenintable2andfigure1.NOTE:Thelongitudinalconversionlossspecifiestheunwantedtransversesignaldetectedbytheterminalequipmentwhenalongitudinalsignalisappliedequallytotheterminalsoftheinterface.Certainnetworksmayhavehighlongitudinalsignallevels(e.g.65Vrootmeansquare(rms));inthiscase,ahigherlongitudinalconversionlossmaybenecessarytoensureadequateoperationoftheterminalequipment.Table2:Longitudinalconversionloss,minimumvaluesFrequencyrangeMinimumvalue300Hzto600Hz40dB600Hzto3400Hz46dBSIST EN 300 450 V1.2.1:2004

ETSIETSIEN300450V1.2.1(2001-07)960010003400FrequencyHz1020304050300LongitudinalconversionlossdB4640020005000500Figure1:Longitudinalconversionloss,minimumvaluesTest:ThetestshallbeconductedaccordingtoclauseA.2.2.4.2.3TransmissionsignalsThesourceandnatureoftheoutputsignalfromtheterminalequipmentinterfacecanbeclassifiedinseveraldifferentwaysthusdividingtheterminalequipmentsintoseveralnon-exclusivecategories.Onetypeofterminalequipmentmaythereforeneedtobetreatedasamemberofmorethanoneofthecategories.Forthepurposesofthepresentdocument,thegeneralcategoriesrequiringidentificationaredefinedasfollows: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).4.2.3.1Equipmentwithanacousticinput4.2.3.1.1SendingLoudnessRating(SLR)Requirement:TheminimumSLRoftheterminalequipment,whenterminatedwiththereferenceimpedanceZR,shallbegreaterthanorequalto-5dB.NOTE:TheminimumSLRvalueof-5dBreferstotheactualmeasuredvalueratherthanthenominalvalue,i.e.thereisnotoleranceonthespecifiedvalue,andhasbeenspecifiedtoensurenoharmtothenetwork.Itisrecommendedthatfornormaloperation,theSLRshouldbegreaterthanorequalto-2dB.Test:ThetestshallbeconductedaccordingtoclauseA.2.3.SIST EN 300 450 V1.2.1:2004

ETSIETSIEN300450V1.2.1(2001-07)104.2.3.2Equipmentwithinternallygeneratedelectricalsignals4.2.3.2.1MaximummeanpowerRequirement:Themeanpowerlevelinthefrequencyrange200Hzto3800Hzinanyone-minuteperiodshallbenotgreaterthan-9dBmwhentheterminalequipmentinterfaceisterminatedwiththereferenceimpedanceZR
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