SIST EN 300 288 V1.2.1:2004

• Abstract:

  Revision to improve the safety related text following a liaison for TC Safety. Specification of the public network side of the interface and test procedures for compliance.

• 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 300 288 V1.2.1 (2001-07) - Access and Terminals (AT); 64 kbit/s digital unrestricted leased line with octet integrity (D64U); Network interface presentation

SIST EN 300 288 V1.2.1:2004 is the Slovenian adoption of an ETSI standard for Access and Terminals (AT). It specifies the public network side of the interface for 64 kbit/s digital unrestricted leased lines with octet integrity (D64U), including the physical, mechanical and electrical interface presentation and the test principles used to check compliance.

What does SIST EN 300 288 V1.2.1:2004 specify?

SIST EN 300 288 V1.2.1:2004 defines the network interface presented by the leased line provider for ONP 64 kbit/s digital unrestricted leased lines with octet integrity. It is intended for codirectional, point-to-point leased lines that are established or released without protocol exchange or other intervention at the NTP.

The standard covers the interface on the public network side and the compliance tests for equipment that provides that interface. It excludes safety, overvoltage and EMC aspects, which are handled by other standards.

Annex	What it covers
Annex A	Normative test methods for compliance
Annex B	Normative code conversion rules for the 64 kbit/s codirectional interface
Annex C	Informative bibliography

What are the key requirements of SIST EN 300 288 V1.2.1:2004?

SIST EN 300 288 V1.2.1:2004 focuses on how the network interface must be presented, how the signal must be coded, and how the interface is checked in tests. In practice, this lets providers, designers and test labs verify the physical interface, the transmitted bit stream, and the immunity of the receive path.

Physical interface and connection

Clause 4.1 requires a hardwired connection by default, with solid conductors in a defined size range, and allows a socket only if the user agrees. Clause 4.1.3 also requires a shield connection point at the NTP.

In practice, this means the installation method is part of the interface definition, not an afterthought. The shield connection point matters when cable shielding is needed to meet EMC-related installation goals.

Output port behaviour

Clause 4.2.1 requires the output signal to follow the code conversion rules in Annex B, and its waveform to meet the specified pulse masks and balance limits based on ITU-T G.703. It also states that normal output timing comes from the network, and that timing under failure conditions must stay within the specified bit-rate tolerance.

For users, this means the provider must present a line signal that can be measured and compared against the defined shape and timing behaviour, not just a nominal 64 kbit/s stream.

Input port behaviour

Clause 4.2.2 requires the input port to accept the Annex B coding without error and to meet the return loss, loss tolerance and reflection immunity requirements. It also specifies the receive-side impedance-to-ground and longitudinal conversion loss limits.

In practice, these requirements protect interoperability. They check that the interface still works with realistic cable loss and reflections, and that the receive path does not react badly to common line disturbances.

Test methods

Annex A links each requirement to a test method, including output coding, waveform shape, failure-condition timing, input coding, input loss tolerance, immunity against reflections, return loss, longitudinal conversion loss and impedance towards ground. The annex also says some tests are meant for equipment that provides the interface, not for an installed leased line.

This matters because compliance is verified at the point of connection, using defined laboratory-style setups. The standard also makes clear that a leased line does not have to be tested before being put into or returned into service.

What terms does SIST EN 300 288 V1.2.1:2004 define?

• leased lines - Telecommunications facilities from a public network that provide defined transmission characteristics between NTPs and do not include user-controlled switching.
• Network Termination Point (NTP) - The physical network access point and its technical access specifications on the public network side.
• Terminal Equipment (TE) - Equipment intended to connect to the public telecommunications network directly, or to interwork with it.
• D64U - The 64 kbit/s digital unrestricted leased line with octet integrity covered by this standard.
• ONP - Open Network Provision, the framework used for harmonized leased-line access conditions.
• PRBS - Pseudo Random Bit Sequence, used as a defined test bit pattern.
• EMC - Electro-Magnetic Compatibility, referenced where shield and interference behaviour are discussed.

Who uses SIST EN 300 288 V1.2.1:2004?

SIST EN 300 288 V1.2.1:2004 is used by leased line providers, telecommunications equipment designers, compliance engineers and test laboratories. Providers use it to present the public network interface correctly, while manufacturers use it to design interface hardware that meets the signal and connection rules.

Quality and procurement teams use it to specify what must be checked in acceptance testing. It is also relevant to engineers working with shielded cabling, return loss, line coding and other practical interface details on D64U services.

What changed in SIST EN 300 288 V1.2.1:2004 from the previous edition?

SIST EN 300 288 V1.2.1:2004 is the Version 1.2.1 publication and incorporates the earlier Amendment 1 to the first edition. The foreword says the revision introduced necessary changes, and the scope notes that the update improved the safety-related text following a liaison for TC Safety.

Which standards are used with SIST EN 300 288 V1.2.1:2004?

• EN 300 289 - Gives the connection characteristics between the NTPs of the leased line.
• EN 300 290 - Specifies the terminal equipment interface for the same D64U service.
• ITU-T G.703 - Provides the physical and electrical interface basis used for the waveform, return loss and related characteristics.
• ITU-T O.152 - Provides the PRBS reference used in testing.

What does the SIST EN 300 288 V1.2.1:2004 document contain?

The document contains the interface scope, definitions, requirements and normative test methods for the D64U network side. It includes figures for the interface arrangement and pulse masks, plus tables for the return loss and longitudinal conversion loss limits.

Annex A gives detailed test set-ups for signal coding, waveform shape, failure-condition timing, input loss tolerance, reflections, return loss, longitudinal conversion loss and impedance towards ground. Annex B sets out the code conversion steps from 64 kbit/s data to the codirectional three-level signal, including the polarity violation rule used to mark octet timing.

The document is structured so that engineers can move from the requirement to the corresponding test. That makes it useful both for interface design and for laboratory verification.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Dostop in terminali (AT) - Digitalni zakupljeni vodi za prenosno hitrost 64 kbit/s brez omejitev za prenašane signale in z ohranjanjem oktetov (D64U) - Omrežni vmesnikAccess and Terminals (AT); 64 kbit/s digital unrestricted leased line with octet integrity (D64U); Network interface presentation33.040.50Vodi, zveze in tokokrogiLines, connections and circuitsICS:Ta slovenski standard je istoveten z:EN 300 288 Version 1.2.1SIST EN 300 288 V1.2.1:2004en01-oktober-2004SIST EN 300 288 V1.2.1:2004SLOVENSKI
STANDARD
ETSIEN300288V1.2.1(2001-07)EuropeanStandard(Telecommunicationsseries)AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);NetworkinterfacepresentationSIST EN 300 288 V1.2.1:2004

ETSIETSIEN300288V1.2.1(2001-07)2ReferenceREN/AT-020004Keywordsdigital,interface,leasedline,ONP,testingETSI650RoutedesLuciolesF-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 300 288 V1.2.1:2004

ETSIETSIEN300288V1.2.1(2001-07)3ContentsIntellectualPropertyRights.5Foreword.5Introduction.61Scope.72References.73Definitionsandabbreviations.73.1Definitions.73.2Abbreviations.84Requirements.84.1Physicalcharacteristics.84.1.1Hardwiredconnection.94.1.2Socketspecification.94.1.3Shieldconnectionpoint.94.2Electricalcharacteristics.94.2.1Outputport.94.2.1.1Signalcoding.94.2.1.2Waveformshape.94.2.1.3Outputtiming.114.2.1.4Outputtimingunderfailureconditions.114.2.1.5Outputreturnloss.114.2.1.6Impedancetowardsground.114.2.1.7Longitudinalconversionloss.114.2.1.8Outputsignalbalance.114.2.2Inputport.124.2.2.1Signalcoding.124.2.2.2Inputtimingandjittertolerance.124.2.2.3Inputreturnloss.124.2.2.4Inputlosstolerance.124.2.2.5Immunityagainstreflections.124.2.2.6Impedancetowardsground.134.2.2.7Longitudinalconversionloss.134.3Safety.134.4Overvoltage.134.5Electromagneticcompatibility.13AnnexA(normative):Testmethods.14A.1General.14A.1.1Additionalinformationtosupportthetest.14A.1.2Equipmentconnection.14A.2Testmethods.15A.2.1Signalcodingatoutputport.15A.2.2Waveformshapeatoutputport.15A.2.3Outputtimingunderfailureconditions.16A.2.4Inputcoding,losstoleranceandimmunityagainstreflections.17A.2.5Returnlossatinputport.18A.2.6Longitudinalconversionloss.18A.2.7Impedancetowardsground.19SIST EN 300 288 V1.2.1:2004

ETSIETSIEN300288V1.2.1(2001-07)4AnnexB(normative):Codeconversionrules.20AnnexC(informative):Bibliography.21History.22SIST EN 300 288 V1.2.1:2004

ETSIETSIEN300288V1.2.1(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)toprovidestandardsforthesupportoftheDirectiveonOpenNetworkProvision(ONP)ofleasedlines(92/44/EEC)(seeannexC).Therearetwootherstandardsdirectlyrelatedtothepresentdocument:-EN300289:"AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Connectioncharacteristics";-EN300290:"AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Terminalequipmentinterface".ThepresentdocumentisbasedoninformationfromITU-TRecommendationsandETSIpublicationsandtherelevantdocumentsarequotedwhereappropriate.NationaltranspositiondatesDateofadoptionofthisEN:29June2001DateoflatestannouncementofthisEN(doa):30September2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31March2002DateofwithdrawalofanyconflictingNationalStandard(dow):31March2002SIST EN 300 288 V1.2.1:2004

ETSIETSIEN300288V1.2.1(2001-07)6IntroductionTheCouncilDirectiveontheapplicationofOpenNetworkProvision(ONP)toleasedlines(92/44/EEC)(seeannexC)concernstheharmonizationofconditionsforopenandefficientaccessto,anduseof,theleasedlinesprovidedoverpublictelecommunicationsnetworksandtheavailabilitythroughouttheCommunity(EEC)ofaminimumsetofleasedlineswithharmonizedtechnicalcharacteristics.OthercountriesoutsidetheEECmayalsochoosetoprovideleasedlinesaccordingtothestandardsproducedtosupporttheDirective(ofwhichthepresentdocumentisoneoftheset).TheconsequenceoftheDirectiveisthatTelecommunicationsOrganizationswithintheEECshallmakeavailableasetofleasedlinesbetweenpointsinthesecountrieswithspecifiedconnectioncharacteristicsandspecifiedinterfaces.UndertheDirective91/263/EEC(seeannexC),laterreplacedby98/13/EC(seeannexC),terminalequipmentforconnectiontotheseleasedlineswasrequiredtofulfilcertainessentialrequirements.Thepresentversionofthepresentdocumenthasbeenproducedtointroducesomenecessarychanges.ETS300166(seeannexC)andITU-TRecommendationG.703[1]wereusedasthebasisfortheinterfacepresentationrequirements.SIST EN 300 288 V1.2.1:2004

ETSIETSIEN300288V1.2.1(2001-07)71ScopeThepresentdocumentspecifiesthetechnicalrequirementsandtestprinciplesforthenetworkinterfacepresentationsofOpenNetworkProvision(ONP)64kbit/sdigitalunrestrictedleasedlineswithoctetintegrity.Thesepresentationsarecodirectional.AconnectionispresentedviainterfacesatNetworkTerminationPoints(NTP).Thepresentdocumentdefinesthenetworkinterfacepresentedbytheleasedlineproviderandshouldbeusedinconjunctionwiththecompanionstandard,EN300289[3],whichspecifiestheconnectioncharacteristicsbetweentheNTPsoftheleasedline.Together,thesedocumentsdescribetheserviceoffered.Thepresentdocumentisapplicabletoleasedlines,includingparttimeleasedlines,whoseestablishmentorreleasedoesnotrequireanyprotocolexchangeorotherinterventionattheNTP.Thepresentdocumentcoversthephysical,mechanicalandelectricalcharacteristics(exceptsafety,overvoltageandEMCaspects)ofthenetworkinterfaceandspecifiestheconformancetestsforequipmentofthekindthatprovidestheinterfacepresentation.Someofthetestsdescribedinthepresentdocumentarenotdesignedtobeappliedtotheinterfaceofaninstalledleasedline;suchtestsmaybeappliedtoequipmentofthekindusedtoprovidetheinterface.Thepresentdocumentdoesnotincludedetailsconcerningtheimplementationofthetestsnordoesitincludeinformationonanyregulationsconcerningtesting.Thereisnorequirementforeachleasedlinetobetestedinaccordancewiththepresentdocumentbeforeitisbroughtinto,orreturnedinto,service.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ITU-TRecommendationG.703(1998):"Physical/electricalcharacteristicsofhierarchicaldigitalinterfaces".[2]ITU-TRecommendationO.152(1992):"Errorperformancemeasuringequipmentforbitratesof64kbit/sandNx64kbit/s".[3]ETSIEN300289:"AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Connectioncharacteristics".[4]ETSIEN300290:"AccessandTerminals(AT);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);Terminalequipmentinterface".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:leasedlines:telecommunicationsfacilitiesprovidedbyapublictelecommunicationsnetworkthatprovidedefinedtransmissioncharacteristicsbetweennetworkterminationpointsandthatdonotincludeswitchingfunctionsthattheusercancontrol(e.g.on-demandswitching)SIST EN 300 288 V1.2.1:2004

ETSIETSIEN300288V1.2.1(2001-07)8NetworkTerminationPoint(NTP):allphysicalconnectionsandtheirtechnicalaccessspecificationswhichformpartofthepublictelecommunicationsnetworkandarenecessaryforaccesstoandefficientcommunicationthroughthatpublicnetworkTerminalEquipment(TE):equipmentintendedtobeconnectedtothepublictelecommunicationsnetwork,i.e.:a)tobeconnecteddirectlytotheterminationofapublictelecommunicationnetwork;orb)tointerworkwithapublictelecommunicationsnetworkbeingconnecteddirectlyorindirectlytotheterminationofapublictelecommunicationsnetwork,inordertosend,process,orreceiveinformation.3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply:D64U64kbit/sdigitalunrestrictedONPleasedlinewithoctetintegritydcdirectcurrentEMCElectro-MagneticCompatibilityNTPNetworkTerminationPointONPOpenNetworkProvisionppmpartspermillionPRBS(211-1)PseudoRandomBitSequence(asdefinedinclause2.1ofITU-TRecommendationO.152[2])rmsrootmeansquareRXReceive(asignalinputateithertheleasedlineinterfaceorthetestequipment,seefigure1)TETerminalEquipmentTXTransmit(asignaloutputateithertheleasedlineinterfaceorthetestequipment,seefigure1)4RequirementsThe64kbit/sunrestrictedleasedlineprovidesabidirectional,point-to-pointdigitalleasedlinewithausablebitrateof64kbit/sandoctetintegrity,wheretheoutputtimingisprovidedfromthenetwork.Theinterfacetimingarrangementsarecodirectional.NOTE:Ifequipmentprovidingtheinterfacerequiresamainssupply,theleasedlineprovidershouldbringthistotheattentionoftheusersothattheusercanprovidemainssupplyback-upfacilities,ifrequired.4.1PhysicalcharacteristicsTheconnectionarrangementsprovidedbytheleasedlineinterfaceshallbesuitableforhardwiredconnection(seeclause4.1.1).However,withtheagreementoftheuser,analternativemeansofconnection,usingasocket,maybeprovided(seeclause4.1.2).Thetransmitpairistheoutputfromthenetworkinterface.Thereceivepairistheinputtothenetworkinterface,asshowninfigure1.Wheretheterms"output"and"input"areusedwithoutqualificationinthepresentdocument,theyrefertothenetworkinterface.INPUTINPUTOUTPUTOUTPUTTXNETWORKINTERFACERXTXTERMINALEQUIPMENTRXFigure1TheuseontheterminalequipmentsideoftheinterfaceofshieldedcablesmaybenecessarytomeetradiationandimmunityrequirementsdefinedinElectro-MagneticCompatibility(EMC)standards.ThereforetheNTPisrequiredtoprovideapointforconnectionoftheshield(seeclause4.1.3).SIST EN 300 288 V1.2.1:2004

ETSIETSIEN300288V1.2.1(2001-07)94.1.1HardwiredconnectionRequirement:Wheretheleasedlineisbeingpresentedasahardwiredconnection,theleasedlineinterfaceshallprovideameansofterminatingwirewithsolidconductorshavingdiametersintherange0,4mmto0,6mm.Theleasedlineprovidershallp
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