SIST EN 300 452 V1.2.1:2004

• 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
• 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 300 452 V1.2.1 (2001-07) - Access and Terminals (AT); Special quality voice bandwidth 4-wire analogue leased line (A4S); Connection characteristics and network interface presentation

SIST EN 300 452 V1.2.1:2004 is the Slovenian adoption of ETSI EN 300 452 Version 1.2.1. It specifies the public-network side of the interface for special quality voice bandwidth 4-wire analogue leased line (A4S) services, together with the performance limits and conformance test principles for the line. It is intended for leased line providers, terminal equipment designers, and test laboratories that need to verify line characteristics at the Network Termination Point (NTP).

What does SIST EN 300 452 V1.2.1:2004 specify?

SIST EN 300 452 V1.2.1:2004 specifies the technical requirements and test principles for the connection characteristics and the physical and electrical characteristics of the network interface presentation for A4S leased lines. It covers the public network side of the interface, not the terminal equipment side.

The standard applies to leased lines, including part-time leased lines, where establishing or releasing the line does not require protocol exchange or other intervention at the NTP. It is aimed at voice-band connections from 300 Hz to 3400 Hz and is primarily written for data transmission between terminal equipments without equalizers, although other traffic types are not excluded.

It is organized into:

• Clause 1-3: scope, references, definitions and abbreviations
• Clause 4: requirements and tests
• Annex A: normative test methods
• Annex B: weighted return loss measurements
• Annex C: overall loss and quantizing distortion
• Annex D: availability
• Annex E: bibliography

Annex	What it covers
A	Normative test methods for each requirement
B	How to calculate weighted return loss
C	Background on overall loss and quantizing distortion
D	Informative availability concepts and figures
E	Bibliographic references

What are the key requirements of SIST EN 300 452 V1.2.1:2004?

SIST EN 300 452 V1.2.1:2004 sets measurable limits for loss, delay, noise, distortion, interface form, and power feeding. In practice, these are the checks used to confirm that a leased line can carry voice-band traffic with the expected stability and without disturbing connected equipment.

Connection performance

Clause 4.1.2 limits overall loss to the range 0 to 13 dB at 1020 Hz with a 600 Ω termination. Clause 4.1.3 then limits loss/frequency distortion across the voice band. This tells a provider and a user how flat the line must be across frequency, which matters for both speech and data signals.

Signal handling

Clause 4.1.4 requires the line to carry a mean input power of -13 dBm over 300 Hz to 3400 Hz, and it must also tolerate a 0 dBm instantaneous signal for a short duration. In practice, this helps prevent clipping or overload when the line sees strong bursts.

Delay and distortion

Clause 4.1.5 limits one-way transmission delay, with a different limit when satellite transmission is involved. Clause 4.1.6 controls group-delay distortion, and Clause 4.1.14 limits harmonic distortion. These requirements matter when timing accuracy, signal shape, or modem-like transmission is important.

Stability, noise, and jitter

Clause 4.1.7 limits amplitude hits and other time variations of overall loss. Clauses 4.1.8 to 4.1.10 limit random circuit noise, impulsive noise, and phase jitter. In practice, these protect against intermittent errors, audible impairment, and timing instability.

Distortion and frequency accuracy

Clause 4.1.11 limits quantizing distortion and total distortion, and it excludes ADPCM systems. Clauses 4.1.12 and 4.1.13 limit single-tone interference and frequency error. This is important when the connection must preserve signal integrity across the voice band.

Interface presentation

Clause 4.2.1 requires an 8-contact socket with ISO/IEC 8877 contact assignments, while Clause 4.2.2 allows a hardwired presentation with solid conductors in the stated wire range. Clause 4.2.3 covers return loss, and Clause 4.2.4 requires no power feeding to or from the terminal equipment interface. This defines how equipment is physically connected and how well it is matched to the network.

What terms does SIST EN 300 452 V1.2.1:2004 define?

• group delay - The propagation time through the leased line at a given frequency.
• group delay distortion - The difference between group delay at a given frequency and the minimum group delay in the band of interest.
• leased lines - Public-network telecommunications facilities that provide defined transmission characteristics between NTPs without user-controlled switching.
• Network Termination Point (NTP) - The physical connection point and access specification forming part of the public network.
• reference impedance ZR - The reference impedance used for tests; in this standard, it is 600 Ω.
• voice bandwidth - The frequency range from 300 Hz to 3400 Hz.
• Adaptive Differential Pulse Coded Modulation (ADPCM) - A coding method mentioned in the quantizing distortion requirement, where it is not to be used for this service.
• quantizing distortion unit (qdu) - The unit used to express quantizing distortion.

Who uses SIST EN 300 452 V1.2.1:2004?

SIST EN 300 452 V1.2.1:2004 is used by leased line providers, network operators, terminal equipment manufacturers, and test laboratories. They use it to design the interface, choose the connector or hardwired presentation, run conformity tests, and confirm that a leased line meets the defined service characteristics.

It is also useful for quality managers and technical buyers who need to specify or check the expected behavior of an A4S leased line, especially when voice-band performance, noise, delay, and return loss matter.

What changed in SIST EN 300 452 V1.2.1:2004 from the previous edition?

SIST EN 300 452 V1.2.1:2004 is a revision of ETS 300 452. The stated purpose of the revision is to improve the safety-related text following a liaison from TC Safety.

Which standards are used with SIST EN 300 452 V1.2.1:2004?

The standard cites these references and companion documents:

• EN 300 453 - terminal equipment interface for ordinary and special quality 4-wire analogue leased lines
• ITU-T O.71 - impulsive noise measuring equipment
• ITU-T O.81 - group-delay measuring equipment
• ITU-T O.91 - phase jitter measuring equipment
• ITU-T O.95 - phase and amplitude hit counters
• ITU-T O.132 - quantizing distortion measuring equipment
• ITU-T O.41 - psophometer for telephone-type circuits
• ISO/IEC 8877 - connector and contact assignments for the 8-contact socket

What does the SIST EN 300 452 V1.2.1:2004 document contain?

SIST EN 300 452 V1.2.1:2004 contains the requirement tables, limit curves, and measurement procedures needed to verify compliance. It includes figures for loss, delay, group delay, and interface arrangement, plus a formula and worked method for weighted return loss in Annex B.

Annex A gives the test set-ups for overall loss, frequency response, delay, noise, jitter, distortion, return loss, and power feeding. Annex C explains why overall loss and quantizing distortion can vary between installations, while Annex D provides background on availability assessment for analogue leased lines.

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.:[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 300 452 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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