SIST EN 300 166 V1.2.1:2003

• Abstract:

  Update of the specification of the physical & electrical characteristics of 64, 2048 8448, 34368, 139264, 155520 kbit/s traffic interfaces & 2048 kHz synchronisation interface.

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.040.20 - Transmission systems
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 300 166 V1.2.1 (2001-09) - Transmission and Multiplexing (TM); Physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2 048 kbit/s - based plesiochronous or synchronous digital hierarchies

SIST EN 300 166 V1.2.1:2003 is the SIST adoption of ETSI EN 300 166 Version 1.2.1, published by the Slovenski inštitut za standardizacijo. It specifies the physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2 048 kbit/s-based plesiochronous or synchronous digital hierarchies, including traffic interfaces and the 2048 kHz synchronisation interface. It is written for people who need interoperable telecom interfaces between equipment from different vendors or operators.

What does SIST EN 300 166 V1.2.1:2003 specify?

SIST EN 300 166 V1.2.1:2003 specifies the physical and electrical parameters for in-station digital network interconnection using metallic pairs, both symmetrical and coaxial. The scope focuses on the 64, 2048, 8448, 34368, 139264 and 155520 kbit/s interface rates, plus the 2048 kHz synchronisation interface.

The document is organized into scope, references, definitions and abbreviations, requirements, and Annex A. Annex A is an informative bibliography. Clause 4 contains the practical interface requirements and a table that shows how the corresponding ITU-T G.703 clauses are treated in this EN.

What are the key requirements of SIST EN 300 166 V1.2.1:2003?

The core of SIST EN 300 166 V1.2.1:2003 is in Clause 4, which maps the relevant interface clauses and then states the electrical checks that matter for compliance and interoperability. In practice, this is the part designers and test labs use to verify that an interface can be connected safely and will behave consistently.

64 kbit/s interface requirements

For the 64 kbit/s co-directional interface, the standard requires a receiver to work without errors with a valid input signal in the presence of longitudinal voltage. It also sets a minimum output return loss.

In practice, this means the interface has to tolerate common-mode disturbance and present an output that is sufficiently well matched to the line. That matters when checking cabling, grounding and impedance matching in real installations.

2048 kbit/s interface requirements

For symmetric 2048 kbit/s interfaces, the standard applies the same tolerable longitudinal-voltage requirement and the same output return-loss requirement. It also notes that nx64 kbit/s signals routed through multiplexing equipment specified for the 2 048 kbit/s-based hierarchy shall have the same physical and electrical characteristics as the 2048 kbit/s interface.

In practice, this keeps tributary and multiplexed interfaces aligned, so a network element can be integrated without special interface exceptions. It is especially relevant for systems that carry multiple 64 kbit/s channels through a 2 Mbit/s hierarchy.

8448 kbit/s and 34368 kbit/s interfaces

For the 8448 kbit/s and 34368 kbit/s interfaces, Clause 4 requires that the output return-loss requirement be met. The document points implementers to the same return-loss principle used elsewhere in the EN.

In practice, these higher-rate interfaces need controlled impedance behavior at the output so that reflections stay within acceptable limits during connection and testing.

139264 kbit/s and 155520 kbit/s interfaces

The scope includes 139264 kbit/s and 155520 kbit/s interfaces, and Clause 15 gives the 155520 kbit/s general characteristics, output-port specifications, input-port specifications and grounding of the outer conductor.

In practice, this is the part used for SDH-related interface implementation, especially where port behavior and grounding need to be checked during design or acceptance testing.

Measurement approach

Clause 4.1 and 4.2 use practical test conditions rather than abstract statements alone. The tolerable longitudinal-voltage test refers to the configuration in ETS 300 011-2, and the return-loss test is defined under dynamic conditions using PRBS.

In practice, test labs need to set up the right signal pattern, bandwidth and measurement conditions, otherwise results are not comparable.

What terms does SIST EN 300 166 V1.2.1:2003 define?

The standard defines the status labels N, I and N/R. N means a normative requirement, I means informative text, and N/R means the clause is not relevant to this EN.

It also uses the abbreviations PDH for Plesiochronous Digital Hierarchy, PRBS for Pseudo-Random Binary Sequence, and SDH for Synchronous Digital Hierarchy. These terms identify the interface families and the test signal used for return-loss measurements.

Who uses SIST EN 300 166 V1.2.1:2003?

SIST EN 300 166 V1.2.1:2003 is used by telecom equipment manufacturers, interface designers, network operators, integrators and test laboratories. They use it when designing, specifying or checking physical interfaces for PDH and SDH equipment, especially where inter-vendor and inter-operator compatibility matters.

Quality teams and buyers also use it to confirm that a product’s digital interface matches the expected electrical behavior before acceptance or deployment.

What changed in SIST EN 300 166 V1.2.1:2003 from the previous edition?

The history identifies an earlier Edition 1 from August 1993. The current version is V1.2.1, and the scope states that it updates the specification of the physical and electrical characteristics for the listed traffic interfaces and the 2048 kHz synchronisation interface.

Which standards are used with SIST EN 300 166 V1.2.1:2003?

The document relies on several ITU-T and ETSI references:

• ITU-T Recommendation G.702 - digital hierarchy bit rates.
• ITU-T Recommendation G.703 - the base physical/electrical characteristics for hierarchical digital interfaces.
• ITU-T Recommendation G.707 - the network node interface for SDH.
• ITU-T Recommendation G.704 - synchronous frame structures used at the listed hierarchical bit rates.
• ETSI ETS 300 011-2 - the conformance test configuration used for the longitudinal-voltage measurement.

These references supply the rate definitions, interface background and test setup that make the EN usable in practice.

What does the SIST EN 300 166 V1.2.1:2003 document contain?

SIST EN 300 166 V1.2.1:2003 contains a clause-by-clause status table for the relevant parts of ITU-T G.703, including which parts are normative, informative or not relevant. It also contains the two key measurement topics for implementation and testing: tolerable longitudinal voltage and output return loss.

Clause 4 explains how return loss is measured, including the use of PRBS, framed and unframed signal conditions, and measurement instrumentation limits. Annex A provides a short bibliography with related ITU-T Recommendations on bonding, earthing and surge resistibility.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Transmission and Multiplexing (TM); Physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2 048 kbit/s - based plesiochronous or synchronous digital hierarchies35.200Vmesniška in povezovalna opremaInterface and interconnection equipment33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 300 166 Version 1.2.1SIST EN 300 166 V1.2.1:2003en01-december-2003SIST EN 300 166 V1.2.1:2003SLOVENSKI
STANDARD
ETSIEN300166V1.2.1(2001-09)EuropeanStandard(Telecommunicationsseries)TransmissionandMultiplexing(TM);Physicalandelectricalcharacteristicsofhierarchicaldigitalinterfacesforequipmentusingthe2048kbit/s-basedplesiochronousorsynchronousdigitalhierarchiesSIST EN 300 166 V1.2.1:2003

ETSIETSIEN300166V1.2.1(2001-09)2ReferenceREN/TM-01061Keywordsinterface,layer1,NNI,PDH,SDHETSI650RoutedesLuciolesF-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 300 166 V1.2.1:2003

ETSIETSIEN300166V1.2.1(2001-09)3ContentsIntellectualPropertyRights.4Foreword.41Scope.52References.53Definitionsandabbreviations.53.1Definitions.53.2Abbreviations.64Requirements.64.1Tolerablelongitudinalvoltage.74.2Minimumoutputreturnloss.7AnnexA(informative):Bibliography.8History.9SIST EN 300 166 V1.2.1:2003

ETSIETSIEN300166V1.2.1(2001-09)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)hasbeenproducedbyETSITechnicalCommitteeTransmissionandMultiplexing(TM).The present document specifies the physical and electrical characteristics of hierarchical interfaces based on ITU-TRecommendationG.703[2]butitdoesnotintendtoprecludetheuseofinterfacescoveredinotherstandards.Theaimofthepresentdocumentistoprovideinter-vendorandinter-operatorcompatibility.TheconformancetestingrequirementscorrespondingtothespecificationscontainedinthepresentdocumentaretobespecifiedinadifferentEN.PhysicalparametersforopticalinterfacesfortheSynchronousDigitalHierarchy(SDH)aretobespecifiedinadifferentstandardwhichisunderdevelopment.NationaltranspositiondatesDateofadoptionofthisEN:31August2001DateoflatestannouncementofthisEN(doa):30November2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31May2002DateofwithdrawalofanyconflictingNationalStandard(dow):31May2002SIST EN 300 166 V1.2.1:2003

ETSIETSIEN300166V1.2.1(2001-09)51ScopeThepresentdocumentspecifiesthephysicalandelectricalparametersofinterfacesbasedonITU-TRecommendationsG.702[1],G.703[2]andG.707[3]forinterconnectionofdigitalnetworkelements:-in-station(i.e.fordistancesbelowafewhundredmetres);-usingmetallic(symmetrica
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