SIST EN 301 080 V1.3.1:2003
(Main)Fixed Radio Systems; Point-to-multipoint equipment; Frequency Division Multiple Access (FDMA); Point-to-multipoint digital radio systems in frequency bands in the range 3 GHz to 11 GHz
General Information
- Abstract
To insert in the mentioned EN's resp.ETS's for P-P radio relay systems a subsection on CW components wihin the section of the spectrum mask
- Status
- Published
- Publication Date
- 30-Nov-2003
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
Overview
SIST EN 301 080 V1.3.1:2003 specifies technical requirements for Fixed Radio Systems employing Frequency Division Multiple Access (FDMA) in point-to-multipoint (P-MP) digital radio networks. These systems operate within frequency bands from 3 GHz up to 11 GHz and primarily serve as access infrastructure for public and private telecommunications networks, providing efficient wireless backhaul and access solutions.
Developed by the Slovenski inštitut za standardizacijo (SIST) and harmonized with the corresponding European Norm (EN 301 080), this standard outlines minimum system parameter requirements, supporting compatibility and spectrum efficiency across deployments in urban, suburban, and regional areas.
Key Topics
- Point-to-Multipoint Radio Architecture: Defines system models for central stations, terminal stations, and optional repeater units, establishing efficient channel allocation and signal management.
- Frequency Bands & Channel Arrangements: Covers frequency planning within the 3 GHz to 11 GHz range, referencing CEPT/ERC recommendations for band segmentation and channel spacing.
- Spectrum Mask and CW Components: Includes guidelines on spectral emissions and continuous wave (CW) elements, ensuring that the transmitted signals meet regulatory limits for spectral purity.
- Electromagnetic Compatibility (EMC): Refers to harmonized EMC standards for fixed radio links, minimizing interference and ensuring compliant operation in real-world network environments.
- Environmental & Power Requirements: Specifies conditions for both weather-protected (indoor) and non-weather-protected (outdoor) installations, as well as standardized power supply characteristics.
- Performance Requirements: Addresses transmission capacity, bit error rate (BER) performance, delay, and transparency between network nodes and subscriber units.
- Antenna and Feeder Specifications: References compliance with EN standards for antenna characteristics in both base and subscriber stations.
Applications
Fixed FDMA point-to-multipoint digital radio systems governed by SIST EN 301 080 are critical in:
- Wireless Local Loop (WLL) and Fixed Wireless Access (FWA): Quick deployment of access infrastructure for voice, fax, and data, particularly in hard-to-wire locations and developing regions.
- Backhaul Solutions: Reliable backbone for extending PSTN (Public Switched Telephone Network), ISDN (Integrated Services Digital Network), and digital data services to distributed users or enterprise sites.
- Network Expansion and Rural Coverage: Facilitates cost-effective network growth and service extension to remote or scattered populations, overcoming topographical challenges.
- Multiservice Transport: Supports a variety of service types through compatible digital and analogue interfaces, fostering convergence of telephony, internet, and multimedia applications.
- Private Networks: Enables secure, high-capacity links for enterprise, utility, and government communications networks.
The standard ensures interoperability at the network interface level and supports flexible deployment schemes, from pre-assigned frequency channels to demand-assigned multiple access (DAMA) configurations.
Related Standards
For comprehensive and compliant system design, consider the following relevant standards and recommendations:
- EN 300 385: EMC standard for fixed radio links and ancillary equipment.
- EN 300 833 / EN 302 085: Antenna specifications for point-to-point and point-to-multipoint systems.
- ITU-R F.696, F.697, F.1189: Radio relay error performance objectives.
- ITU-T G.703, G.821, G.826, G.131: Digital transmission and error performance.
- CEPT/ERC Recommendation 14-03, 12-05, 74-01: Harmonized radio channel plans and spurious emissions.
- EN 300 132: Power supply interface guidelines for telecom equipment.
- ETSI EG 202306: Transmission and multiplexing guidance for access networks.
Adhering to these interconnected standards helps network operators and manufacturers deliver robust, high-performance radio solutions compliant with European and global regulations.
This SEO-focused summary covers the essence, scope, and relevance of SIST EN 301 080 V1.3.1:2003 for fixed radio system deployments in the 3 GHz to 11 GHz bands, targeting network operators, equipment vendors, and system integrators seeking standards-compliant solutions.
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Frequently Asked Questions
SIST EN 301 080 V1.3.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Fixed Radio Systems; Point-to-multipoint equipment; Frequency Division Multiple Access (FDMA); Point-to-multipoint digital radio systems in frequency bands in the range 3 GHz to 11 GHz". This standard covers: To insert in the mentioned EN's resp.ETS's for P-P radio relay systems a subsection on CW components wihin the section of the spectrum mask
To insert in the mentioned EN's resp.ETS's for P-P radio relay systems a subsection on CW components wihin the section of the spectrum mask
SIST EN 301 080 V1.3.1:2003 is classified under the following ICS (International Classification for Standards) categories: 33.040.20 - Transmission systems; 33.060.30 - Radio relay and fixed satellite communications systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 301 080 V1.3.1:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Fixed Radio Systems; Point-to-multipoint equipment; Frequency Division Multiple Access (FDMA); Point-to-multipoint digital radio systems in frequency bands in the range 3 GHz to 11 GHz33.060.30Radiorelejni in fiksni satelitski komunikacijski sistemiRadio relay and fixed satellite communications systems33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 301 080 Version 1.3.1SIST EN 301 080 V1.3.1:2003en01-december-2003SIST EN 301 080 V1.3.1:2003SLOVENSKI
STANDARD
ETSIEN301080V1.3.1(2001-02)EuropeanStandard(Telecommunicationsseries)FixedRadioSystems;Point-to-multipointequipment;FrequencyDivisionMultipleAccess(FDMA);Point-to-multipointdigitalradiosystemsinfrequencybandsintherange3GHzto11GHzSIST EN 301 080 V1.3.1:2003
ETSIETSIEN301080V1.3.1(2001-02)2ReferenceREN/TM-04111-18KeywordsFDMA,multipoint,radio,RLL,transmission,FWAETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frCopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2001.Allrightsreserved.SIST EN 301 080 V1.3.1:2003
ETSIETSIEN301080V1.3.1(2001-02)3ContentsIntellectualPropertyRights.5Foreword.5Introduction.61Scope.72References.83Definitions,symbolsandabbreviations.103.1Definitions.103.2Symbols.103.3Abbreviations.104Generalcharacteristics.124.1Generalsystemarchitecture.124.2Frequencybandsandchannelarrangements.134.2.1Channelplan.134.2.2Proposedchannelarrangements.134.3Compatibilityrequirements.134.4Environmentalconditions.134.4.1Equipmentwithinweatherprotectedlocations(indoorlocations).144.4.2Equipmentfornon-weatherprotectedlocations(outdoorlocations).144.5Powersupply.144.6ElectromagneticCompatibility(EMC)conditions.144.7TelecommunicationsManagementNetwork(TMN)interfaces.144.8Synchronizationofinterfacebitrates.144.9Branching/feeder/antennarequirements.144.9.1Antennaradiationpattern.145Systemparameters.155.1Systemcapacity.155.2Roundtripdelay.155.3Transparency.155.4Voicecodingmethods.155.5Transmittercharacteristics.155.5.1Transmitterpowerrange.165.5.2AutomaticTransmitPowerControl(ATPC).165.5.3Transmitter(Tx)LocalOscillator(LO)frequencyarrangements.165.5.4RFspectrummask.165.5.4.1RFspectrummaskforthecentralradiostation.165.5.4.2RF-spectrummaskfortheterminalstationandtherepeaterstation.185.5.4.3DiscreteCWcomponentsexceedingthespectrummasklimit(allstations).185.5.5RFtolerance.185.5.6Spuriousemissions.195.6Receivercharacteristics.195.6.1Receiver(Rx)LOfrequencyarrangements.195.6.2Spuriousemissions.195.7Systemperformancewithoutdiversity.195.7.1Dynamiclevelrange.195.7.2BERasafunctionofReceiverinputSignalLevel(RSL).195.7.3EquipmentBackgroundBER(BBER).215.7.4Interferencesensitivity(external).215.7.4.1Cochannelinterference.215.7.4.2Adjacentchannelinterference.215.7.5Distortionsensitivity.225.7.6ContinuousWave(CW)spuriousinterference.225.8Systemperformancewithdiversity.22SIST EN 301 080 V1.3.1:2003
ETSIETSIEN301080V1.3.1(2001-02)46Typesofinterfacesatthesubscriberequipmentandthenetworknode.22AnnexA(informative):Bibliography.23History.24SIST EN 301 080 V1.3.1:2003
ETSIETSIEN301080V1.3.1(2001-02)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)hasbeenproducedbyETSITechnicalCommitteeTransmissionandMultiplexing(TM).ThepresentdocumentcontainstheminimumtechnicalrequirementstoensurecompatibilityofproductsandconformancewithradioregulationsacrossETSImemberstates.Radioterminalsfromdifferentmanufacturersarenotrequiredtointerworkatradiofrequency(i.e.nocommonairinterface).Thepresentdocumentisintendedtocoveravarietyofsystemsdesignedforavarietyofservices,applications,performanceobjectivesanddeploymentconditions.Thereforeitisnecessarytoincludeinthepresentdocumentdifferentsetsofsystemparameters.Inthepresentdocumentthesesetofparametersarereferredtoas"systemtypes".Theformertitleofthepresentdocumentwas:"TransmissionandMultiplexing(TM);DigitalRadioRelaySystems(DRRS);FrequencyDivisionMultipleAccess(FDMA);Point-to-multipointDRRSinfrequencybandsintherange3GHzto11GHz".NationaltranspositiondatesDateofadoptionofthisEN:16February2001DateoflatestannouncementofthisEN(doa):31May2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30November2001DateofwithdrawalofanyconflictingNationalStandard(dow):30November2001SIST EN 301 080 V1.3.1:2003
ETSIETSIEN301080V1.3.1(2001-02)6IntroductionThemainfieldofapplicationofPoint-to-Multipoint(P-MP)systems,usingtheFixedService(FS),istoprovideaccesstobothpublicandprivatenetworks(PublicSwitchedTelephoneNetwork(PSTN),PublicDataNetwork(PDN),etc.).BymeansofP-MPsystemsthenetworkserviceareamaycoverscatteredsubscriberlocations.Thesystemsmaybeappliedtobuildnewaccessnetworksbymeansofamulticellulararchitecture,coveringbothurbanandregionalareas.Subscribersareofferedthefullrangeofservicesbytheparticularpublicorprivatenetwork.Subscribershaveaccesstotheseservicesbymeansofthevariousstandardizedusernetworkinterfaces(e.g.2-wireloop,andIntegratedServicesDigitalNetwork(ISDN)rangingfrombasicrateton×primaryrate).P-MPsystemsprovidestandardnetworkinterfacesandtransparentlyconnectsubscriberstotheappropriatenetworknode.Thesesystemsallowaservicetobeconnectedtoanumberofsubscribersrangingfromafewtoseveralthousand,andoverawiderangeofdistances.P-MPsystemsaregenerallyconfiguredaspre-assignedsystemsorasDemandAssignedMultipleAccess(DAMA)radiosystems.TheessentialfeaturesofatypicalP-MPradiosystemare:-efficientuseoftheradiospectrum;-concentration;-transparency.Radioisoftentheidealwayofobtainingcommunicationsatlowcostandalmostindependentofdistance,anddifficulttopography.Moreover,asmallnumberofsitesarerequiredfortheseinstallations,thusfacilitatingrapidimplementationandminimizingmaintenancerequirementsofthesystems.Concentrationmeansthatmsubscriberscansharenradiochannels(mbeinglargerthann),allowingabetteruseoftheavailablefrequencyspectrumatalowerequipmentcosts.Theterm"multi-access"meansthateverysubscriberhasaccesstoeverychannel(insteadofafixedassignmentasinmostmultiplexsystems).Whenacallisinitiated,anavailablechannelisallocatedtoit.Whenthecallisterminated,thechannelisreleasedforanothercall.Concentrationrequirestheuseofdistributedintelligentcontrolwhichinturnallowsmanyotheroperationandmaintenancefunctionstobeadded.Transparencymeansthatthenetworknode(servicenode)andthesubscriberequipmentcommunicatewitheachotherwithoutbeingawareoftheradiolink.SIST EN 301 080 V1.3.1:2003
ETSIETSIEN301080V1.3.1(2001-02)71ScopeThepresentdocumentspecifiestheminimumrequirementsforsystemparametersofFrequencyDivisionMultipleAccess(FDMA)Point-to-Multipoint(P-MP)radiosystemsintheterrestrialFixedService(FS)operatinginthebands3GHzto11GHz.Thesystemwillprovideaccesstobothpublicandprivatenetworks(PublicSwitchedTelephoneNetwork(PSTN),PublicDataNetwork(PDN),etc.)bymeansofthevariousstandardizednetworkinterfaces(e.g.2-wireloop,IntegratedServicesDigitalNetwork(ISDN)and2Mbit/s).Thesystemmaybeappliedtobuildaccessnetworksbymeansofamulticellulararchitecture,coveringurban,suburban,andregionalareas.TheFDMAP-MPsystemwilltransmitaRadioFrequency(RF)signalfromthecustomersitetotheCentralStation(CS)onlyutilizingaspectralbandwidthcorrespondingtothatcapacitywhichisrequestedfromandassignedtothecustomerbypre-assignmentorbyDemandAssignedMultipleAccess(DAMA).TheCSreceivesfromeachcustomersiteasinglemodulatedcarrierbeingprocessedindependentlywithintheCS.ThustheCSisreceivingaFDMAsignal.ThepresentdocumentcoversthefollowingtypicalP-MPapplications:Thetransmissionof:-voice;-fax;-voicebanddata;-telex;relatedtoanalogueinterfacesand:-64Kbit/s;-ISDN;-digitalvideo;-digitalaudio;relatedtodigitalinterfaces.FurtherapplicationslikeAsynchronousTransportMode(ATM)mayalsobeprovided.Twoclassesofsystemshavebeendefinedinordertotakeintoaccountthelargevarietyofpossibleapplicationsduetoaccessnetworkimplementationsandtypeofservicetobeprovided.TheequipmentcoveredbythepresentdocumentshouldbedesignedtobeabletomeetthenetworkperformancerequirementsforeseenbyITU-RRecommendationsF.696-2[1]andF.697-2[2],formedium,localgradeorITU-RRecommendationF.1189-1[3]nationalportion(accessorshorthaul)ofthedigitalconnectionfollowingthecriteriadefinedinITU-TRecommendation(s)G.821[4]and/orG.826[5].ItshouldbenotedthatthevaluesforBandCareprovisionaltakingalsointoaccountnote5ofITU-RRecommendationF.1189-1[3].Theavailabilityrequirementsareunderfurtherstudybytherelevantbodies.Networkoperatorsmaychoosedifferentperformanceandavailabilityrequirementsinordertoextendthepossibleareaofapplicationthusfittingtotheirnetworkneeds.Radioterminalsfromdifferentmanufacturersarenotintendedtointerworkatradiofrequency(i.e.nocommonairinterface).Thepresentdocumentdefinestherequirementsofradioterminalandradio-relayequipmentincludingtheinterfaces.Therequirementsformultiplex,networkmanagementandantenna/feederequipmentmaybeaddressedelsewhere.SIST EN 301 080 V1.3.1:2003
ETSIETSIEN301080V1.3.1(2001-02)82ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.[1]ITU-RRecommendationF.696-2:"Errorperformanceandavailabilityobjectivesforhypotheticalreferencedigitalsectionsformingpartorallofthemedium-gradeportionofanISDNconnectionatabitratebelowtheprimaryrateutilizingdigitalradiorelaysystems".[2]ITU-RRecommendationF.697-2:"Errorperformanceandavailabilityobjectivesforthelocal-gradeportionateachendofanISDNconnectionabitratebelowtheprimaryrateutilizingdigitalradio-relaysystems".[3]ITU-RRecommendationF.1189-1:"ErrorPerformanceObjectivesforconstantbitratedigitalpathsatorabovetheprimaryratecarriedbydigitalradio-relaysystemswhichmayformpartorallthenationalportionofa27500kmhypotheticalreferencepath".[4]ITU-TRecommendationG.821:"Errorperformanceofaninternationaldigitalconnectionoperatingatabitratebelowtheprimaryrateandformingpartofanintegratedservicesdigitalnetwork".[5]ITU-TRecommendationG.826:"Errorperformanceparametersandobjectivesforinternational,constantbitratedigitalpathsatorabovetheprimaryrate".[6]CEPT/ERCRecommendation14-03:"Harmonizedradiofrequencychannelarrangementsforlowandmediumcapacitysystemsintheband3400MHzto3600MHz".[7]CEPT/ERCRecommendation12-05:"Harmonizedradiofrequencychannelarrangementsfordigitalterrestrialfixedsystemsoperatingintheband10.0to10.68GHz".[8]ETSIETS300019:"Equipmentengineering(EE);Environmentalconditionsandenvironmentaltestsfortelecommunicationequipment;Part1-3:Classificationofenvironmentalconditions;StationaryuseatweatherprotectedlocationsandPart1-4:ClassificationofenvironmentalconditionsStationaryuseatnon-weatherprotectedlocations".[9]ETSIETS300132(allparts):"Equipmentengineering(EE);Powersupplyinterfaceattheinputtotelecommunicationsequipment".[10]ETSIEN300385:"ElectromagneticcompatibilityandRadiospectrumMatters(ERM);ElectroMagneticCompatibility(EMC)standardforfixedradiolinksandancillaryequipment".[11]ITU-TRecommendationG.773:"ProtocolsuitesforQ-interfacesformanagementoftransmissionsystems".[12]ITU-TRecommendationG.810:"Definitionsandterminologyforsynchronizationnetworks".[13]ITU-TRecommendationG.812:"Timingrequirementsofslaveclockssuitableforuseasnodeclocksinsynchronizationnetworks".[14]ITU-TRecommendationG.823:"Thecontrolofjitterandwanderwithindigitalnetworkswhicharebasedonthe2048kbit/shierarchy".[15]ITU-TRecommendationG.813:"TimingcharacteristicsofSDHequipmentslaveclocks(SEC)".[16]ITU-TRecommendationG.825:"Thecontrolofjitterandwanderwithindigitalnetworkswhicharebasedonthesynchronousdigitalhierarchy(SDH)".SIST EN 301 080 V1.3.1:2003
ETSIETSIEN301080V1.3.1(2001-02)9[17]ETSIEN300833:"FixedRadioSystems;PointtoPointAntennas;Antennasforpoint-to-pointfixedradiosystemsoperatinginthefrequencyband3GHzto60GHz".[18]ETSIEN302085:"FixedRadioSystems;Point-to-MultipointAntennas;Antennasforpoint-to-multipointfixedradiosystemsinthe3GHzto11GHzband".[19]ITU-TRecommendationG.703:"Physical/electricalcharacteristicsofhierarchicaldigitalinterfaces".[20]ITU-TRecommendationG.131:"Controloftalkerecho".[21]ITU-TRecommendationG.711:"Pulsecodemodulation(PCM)ofvoicefrequencies".[22]ITU-TRecommendationG.726:"40,32,24,16kbit/sAdaptiveDifferentialPulseCodeModulation(ADPCM)".[23]ITU-TRecommendationG.728:"Codingofspeechat16kbit/susinglow-delaycodeexcitedlinearprediction".[24]ITU-TRecommendationG.729:"CsourcecodeandtestvectorsforimplementationverificationoftheG.7298kbit/sCS-ACELPspeechcoder".[25]ITU-TRecommendationO.151:"Errorperformancemeasuringequipmentoperatingattheprimaryrateandabove".[26]ITU-TRecommendationO.181:"EquipmenttoassesserrorperformanceonSTM-Ninterfaces".[27]CEPT/ERCRecommendation74-01:"SpuriousEmissions".[28]ITU-TRecommendationQ.552:"Transmissioncharacteristicsat2-wireanalogueinterfacesofdigitalexchanges".[29]ITU-TRecommendationQ.553:"Transmissioncharacteristicsat4-wireanalogueinterfacesofdigitalexchanges".[30]ITU-TRecommendationR.20:"Telegraphmodemforsubscriberlines".[31]ITU-TRecommendationV-series:"Datacommunicationoverthetelephonenetwork".[32]ITU-TRecommendationX-series:"Datanetworksandopensystemcommunication".[33]ITU-TRecommendationG.961:"DigitaltransmissionsystemonmetalliclocallinesforISDNbasicrateaccess".[34]ETSIETS300012:"IntegratedServicesDigitalNetwork(ISDN);Basicuser-networkinterface;Layer1specificationandtestprinciples".[35]ETSIETS300011:"IntegratedServicesDigitalNetwork(ISDN);Primaryrateuser-networkinterface;Layer1specificationandtestprinciples".[36]ITU-TRecommendationG.962:"AccessdigitallinesectionforISDNprimaryrateat2048kbit/s".[37]ITU-TRecommendationG.707:"Networknodeinterfaceforthesynchronousdigitalhierarchy(SDH)".[38]ITU-TRecommendationG.964:"V-Interfacesatthedigitallocalexchange(LE)-V5.1interface(basedon2048kbit/s)forthesupportofaccessnetwork(AN)".[39]ITU-TRecommendationG.965:"V-Interfacesatthedigitallocalexchange(LE)-V5.2interface(basedon2048kbit/s)forthesupportofaccessnetwork(AN)".[40]ITU-TRecommendationG.957:"Opticalinterfacesforequipmentandsystemsrelatingtosynchronousdigitalhierarchy".[41]ETSIETS300324:"VinterfacesatthedigitalLocalExchange(LE);V5.1interfaceforthesupportofAccessNetwork(AN)".SIST EN 301 080 V1.3.1:2003
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