SIST EN 300 167 V1.2.1:2003

• Abstract:

  Update of ETS 300 167 - equivalent to the parts of G.704 and G.706 relevant to 2 Mbit/s interfaces. Frame structure of 2 Mbit/s signals (basic frame & octet structured frames)including frame alignment (&CRC procedures) & use of bits in time slot 0.

• 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 300 167 V1.2.1 (2001-09) - Transmission and Multiplexing (TM); Functional characteristics of 2 048 kbit/s interfaces

SIST EN 300 167 V1.2.1:2003 is the Slovenian adoption of ETSI EN 300 167 Version 1.2.1. It specifies the synchronous frame structures and Cyclic Redundancy Check (CRC) procedures for 2 048 kbit/s interfaces, based on ITU-T Recommendation G.704, and it is written to support inter-vendor and inter-operator compatibility.

What does SIST EN 300 167 V1.2.1:2003 specify?

SIST EN 300 167 V1.2.1:2003 specifies the functional characteristics of 2 048 kbit/s interfaces. It focuses on the frame structure used at 2 Mbit/s, including basic frame and octet structured frames, frame alignment, CRC procedures, and the use of bits in time slot 0.

The standard is organized into clauses for scope, references, definitions and abbreviations, and requirements. Clause 4 contains the technical requirements and points back to ITU-T Recommendation G.704, while Annex A gives CRC implementation examples and Annex B lists abbreviations.

Part	What it covers
Clause 4	Requirements that apply to 2 048 kbit/s interfaces and the statements made to ITU-T G.704
Annex A	Examples of CRC implementations using shift registers, including the CRC-4 procedure for 2 048 kbit/s interfaces
Annex B	Alphabetic list of abbreviations used in the recommendation

What are the key requirements of SIST EN 300 167 V1.2.1:2003?

SIST EN 300 167 V1.2.1:2003 makes the 2 048 kbit/s frame structure and related CRC handling the core of the specification. In practice, this is the part that equipment designers and operators use to make sure interfaces can interwork correctly.

Clause 4 links this standard to ITU-T G.704

Clause 4 sets out modifications and statements to ITU-T Recommendation G.704. The table in this clause marks each item as normative, informative, or not relevant. For a reader, that means some G.704-related features are mandatory, some are explanatory, and others are outside the scope of this standard.

The 2 048 kbit/s frame structure is normative

The table in Clause 4 treats the basic frame structure at 2 048 kbit/s as normative. That means implementations for this interface need to follow the specified structure if they are to claim compliance.

The interface may carry 64 kbit/s channels

Clause 5.1 covers the interface at 2 048 kbit/s carrying 64 kbit/s channels. It includes the frame structure, the use of other 64 kbit/s channel time slots, and signalling. In practice, this is the part a designer uses when mapping payload channels into the 2 Mbit/s frame.

Clause 5 also covers n x 64 kbit/s signals

Clause 5.2 covers one n x 64 kbit/s signal on the tributary side of a multiplex equipment and one or more n x 64 kbit/s signals on the multiplexed signal side. The note says the time slots making up an n x 64 kbit/s signal do not have to be contiguous inside the operator's network, which matters when planning channel allocation.

CRC handling is part of the interface behavior

The foreword states that the standard covers frame alignment and CRC procedures for the basic frame structures defined in ITU-T G.704. Annex A then gives examples of CRC implementations using shift registers, including the CRC-4 procedure for 2 048 kbit/s interfaces. This helps implementers build compatible framing and error-check functions.

Conformance testing is handled elsewhere

The foreword says that the conformance testing requirements for these specifications are to be given in a different EN. So this document defines the functional characteristics, while the separate test standard is where formal compliance testing is specified.

What terms does SIST EN 300 167 V1.2.1:2003 define?

SIST EN 300 167 V1.2.1:2003 defines a small set of terms used to read the requirements correctly.

• N - normative: a requirement that must be followed to claim compliance with this standard.
• I - informative: text provided for information only.
• N/R - not relevant: a clause that does not apply to this standard.
• CRC - Cyclic Redundancy Check, the error-checking method used here for frame-related procedures.

Who uses SIST EN 300 167 V1.2.1:2003?

SIST EN 300 167 V1.2.1:2003 is used by telecom equipment manufacturers, transmission and multiplexing engineers, network operators, and test or quality teams working with 2 048 kbit/s interfaces. It is relevant when designing interface behavior, checking framing and CRC handling, and making sure equipment from different vendors can work together.

What changed in SIST EN 300 167 V1.2.1:2003 from the previous edition?

SIST EN 300 167 V1.2.1:2003 updates ETS 300 167. The document history shows an earlier Edition 1 from August 1993 and the later Version 1.2.1 published in 2001.

Which standards are used with SIST EN 300 167 V1.2.1:2003?

SIST EN 300 167 V1.2.1:2003 relies on these normative references:

• ITU-T Recommendation G.704 - provides the synchronous frame structures used at 2 048 kbit/s and the related hierarchical levels.
• ITU-T Recommendation G.706 - provides frame alignment and CRC procedures for the basic frame structures defined in G.704.
• ITU-T Recommendation G.703 - provides the physical and electrical characteristics of hierarchical digital interfaces.

What does the SIST EN 300 167 V1.2.1:2003 document contain?

The document contains the scope, references, definitions and abbreviations, and a requirements clause that maps this standard to ITU-T G.704. It also includes Table 1, which identifies which G.704 clauses are normative, informative, or not relevant for this recommendation.

Annex A gives examples of CRC implementation using shift registers, including separate procedures for CRC-6, CRC-5, and CRC-4 cases. Annex B gives an alphabetic list of abbreviations used in the recommendation.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prenos in multipleksiranje (TM) – Funkcijske karakteristike vmesnikov s hitrostjo 2048 kbit/sTransmission and Multiplexing (TM); Functional characteristics of 2 048 kbit/s interfaces35.200Vmesniška in povezovalna opremaInterface and interconnection equipment33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 300 167 Version 1.2.1SIST EN 300 167 V1.2.1:2003en01-december-2003SIST EN 300 167 V1.2.1:2003SLOVENSKI
STANDARD
ETSIEN300167V1.2.1(2001-09)EuropeanStandard(Telecommunicationsseries)TransmissionandMultiplexing(TM);Functionalcharacteristicsof2048kbit/sinterfacesSIST EN 300 167 V1.2.1:2003

ETSIETSIEN300167V1.2.1(2001-09)2ReferenceREN/TM-01062Keywordsinterface,transmissionETSI650RoutedesLuciolesF-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 300 167 V1.2.1:2003

ETSIETSIEN300167V1.2.1(2001-09)3ContentsIntellectualPropertyRights.4Foreword.41Scope.52References.53Definitionsandabbreviations.53.1Definitions.53.2Abbreviations.54Requirements.6History.7SIST EN 300 167 V1.2.1:2003

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