SIST EN 300 147 V1.4.1:2003

• Abstract:

  This new edition of EN 300 147 will take account if changes in the IT as a result of the publication of ITU-T Recommendation G.707 (3/96) Network node interface for the synchronous digital hierarchy which replaces former ITU-T Recommendations G.707, G.708 and G.709.

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.040.20 - Transmission systems
• 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 300 147 V1.4.1 (2001-09) - Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); Multiplexing structure

SIST EN 300 147 V1.4.1:2003 is the Slovenian adoption of ETSI EN 300 147 V1.4.1, a European Telecommunications Series standard from ETSI. It specifies the SDH multiplexing structure for transmission networks, including hierarchical bit rates, multiplexing methods, pointer handling, overhead bytes and tributary mapping. It is aimed at network operators, equipment makers and anyone who needs SDH interfaces to work together across vendors and networks.

What does SIST EN 300 147 V1.4.1:2003 specify?

SIST EN 300 147 V1.4.1:2003 specifies the SDH multiplexing structure used in transmission networks and organizes that material into clauses 1 to 11, plus two annexes. The document is built as a delta to ITU-T Recommendation G.707, so it follows the G.707 clause structure and states where requirements are normative or not relevant.

Annex	What it covers
Annex A	G.707 corrigendum
Annex B	Bibliography

Clauses 1 to 10 cover the technical SDH structure, while Clause 11 explains the conformance-testing approach. Annex A carries corrections and clarifications for the G.707-based material, and Annex B lists background recommendations.

What are the key requirements of SIST EN 300 147 V1.4.1:2003?

Multiplexing structure and hierarchy

Clause 4 states that the basic SDH multiplexing structure follows the model shown in Figure 1 and is a subset of the structure defined in G.707. In practice, this tells implementers which SDH hierarchy this standard covers and which parts of the wider G.707 structure are in scope.

Clause 5 covers multiplexing of Administrative Unit Groups (AUGs) into STM-N and the related numbering schemes for AU-n and VC-n in STM-256, STM-64, STM-16, STM-4, STM-1 and STM-0. In practice, designers must use the right hierarchy level and numbering method for the frame size they are implementing.

Pointers and overhead

Clause 6 covers AU-n, TU-3 and TU-2/TU-1 pointers, including location, value, frequency justification, New Data Flag (NDF), generation and interpretation. Some AU-3 and TU-11 pointer references are marked not relevant. For equipment design, this means pointer processing is required only for the pointer types the standard keeps in scope.

Clause 7 describes Section OverHead (SOH) and Path OverHead (POH), including framing bytes, trace bytes, data communication channels, alarm and protection bytes, and Forward Error Correction (FEC) related bytes. The standard also notes that Enhanced RDI is not supported in the stated path-status cases. In practice, these bytes carry framing, management, monitoring and protection information, so they must be placed and interpreted correctly.

Tributary mapping and concatenation

Clause 8 specifies mapping of tributaries into VC-n, including signals from ITU-T G.702, ATM cells, HDLC framed signals, DQDB and FDDI at 125 000 kbit/s. Some mapping cases are marked not relevant. For implementers, this clause shows which payload types the SDH structure supports and which mapping method to apply.

Clause 9 covers VC concatenation, including contiguous concatenation of VC-4s and virtual concatenation of VC-3/4s and VC-2/1s. In practice, this is the part to use when transport capacity must be grouped across multiple virtual containers.

Annex statements and testing

Clause 10 gives the statements to the annexes, including FEC for STM-64 and STM-256, the CRC-7 polynomial algorithm, and Tandem Connection Monitoring protocols for VC-4/VC-3 and VC-2/VC-1. Clause 11 explains that conformance testing is performed on functional blocks within a network element using SDH interfaces. That matters because testing is tied to the implemented function, not to the whole product as a single block.

What terms does SIST EN 300 147 V1.4.1:2003 define?

• SDH - Synchronous Digital Hierarchy, the transmission hierarchy used throughout the standard.
• STM-N - Synchronous Transport Module (-N), the SDH transport frame at a given hierarchical level.
• AUG - Administrative Unit Group, the grouped structure that is multiplexed into STM-N.
• VC-n - Virtual Container-n, the payload container used for tributary mapping and concatenation.
• SOH - Section OverHead, the SDH overhead used for framing, management and section functions.
• POH - Path OverHead, the overhead associated with a virtual container path.
• NNI - Network Node Interface, the interface type the standard uses as its SDH reference point.

Who uses SIST EN 300 147 V1.4.1:2003?

SIST EN 300 147 V1.4.1:2003 is used by SDH network operators, transmission equipment manufacturers, system integrators and test engineers. It supports interface design, mapping of tributaries, overhead processing, pointer handling and conformance testing for SDH network elements. Quality and procurement teams also use it when checking whether a product or interface follows the same SDH multiplexing rules as the rest of the network.

What changed in SIST EN 300 147 V1.4.1:2003 from the previous edition?

This edition takes account of changes introduced by ITU-T Recommendation G.707 (3/96), which replaced the former ITU-T Recommendations G.707, G.708 and G.709. The document is also based on ITU-T Recommendation G.707 and incorporates the G.707 corrigendum in Annex A.

Which standards are used with SIST EN 300 147 V1.4.1:2003?

The main normative references are:

Standard	Contribution
ITU-T Recommendation G.707 (2000)	Base SDH network node interface text that this standard follows and modifies
ITU-T Recommendation G.707 Corrigendum 1 (2001)	Corrects errors in G.707 and is reflected in Annex A
ITU-T Recommendation G.702	Provides the digital hierarchy bit rates used for mapped signals

The bibliography also points to ITU-T G.704, G.811 and G.831 for related frame-structure, timing and management background.

What does the SIST EN 300 147 V1.4.1:2003 document contain?

The document contains a structure table of clause applicability, a multiplexing-structure figure, and detailed tables that mark each G.707 subclause as normative or not relevant. It also includes byte-description material for SOH and POH, mapping tables for tributaries and payload types, and concatenation statements for VC groups. Annex A adds corrected figures and notes for FEC, BCH and byte placement, while Annex B collects background references for further reading.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prenos in multipleksiranje (TM) – Sinhrona digitalna hierarhija (SDH) –Struktura multipleksiranjaTransmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); Multiplexing structure33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 300 147 Version 1.4.1SIST EN 300 147 V1.4.1:2003en01-december-2003SIST EN 300 147 V1.4.1:2003SLOVENSKI
STANDARD
ETSI ETSI EN 300 147 V1.4.1 (2001-09)2
Reference REN/TM-01063 Keywords architecture, MUX, SDH, transmission ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, send your comment to: [e-mail] Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2001. All rights reserved.
ETSI ETSI EN 300 147 V1.4.1 (2001-09)3 Contents Intellectual Property Rights.4 Foreword.4 Introduction.4 1 Scope.5 2 References.5 3 Definitions, abbreviations and conventions.5 3.1 Definitions.5 3.2 Abbreviations.5 3.3 Conventions.6 4 Basic multiplexing principles.7 5 Multiplexing method.8 6 Pointers.9 7 Overhead bytes description.10 8 Mapping of tributaries into VC-n.11 9 VC Concatenation.11 10 Statements to the annexes.12 11 Conformance testing.12 Annex A (normative): G.707 corrigendum.14 Annex B (informative): Bibliography.19 History.20
ETSI ETSI EN 300 147 V1.4.1 (2001-09)4 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://www.etsi.org/legal/home.htm). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Transmission and Multiplexing (TM). The present document specifies the physical and electrical characteristics of hierarchical interfaces based on IUT-T Recommendation G.707 [1] but it does not intend to preclude the use of interfaces covered in other standards. The aim of the present document is to provide inter-vendor and inter-operator compatibility. The conformance testing requirements corresponding to the specifications contained in the present document are to be specified in a different EN. Physical parameters for optical interfaces for the Synchronous Digital Hierarchy (SDH) are to be specified in a different standard which is under development.
National transposition dates Date of adoption of this EN: 21 September 2001 Date of latest announcement of this EN (doa): 31 December 2001 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
30 June 2002 Date of withdrawal of any conflicting National Standard (dow): 30 June 2002
Introduction The present document is a delta document based on ITU Recommendation G.707 [1]. SIST EN 300 147 V1.4.1:2003

ETSI ETSI EN 300 147 V1.4.1 (2001-09)5 1 Scope The present document specifies the hierarchical bit rates, the multiplexing structure and the mapping schemes to be used in the transmission networks based on the Synchronous Digital Hierarchy (SDH). 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication and/or edition number or version number) or non-specific. • For a specific reference, subsequent revisions do not apply. • For a non-speci²fic reference, the latest version applies. [1] ITU-T Recommendation G.707 (2000): "Network node interface for the synchronous digital hierarchy (SDH)". NOTE: ITU-T Recommendation G.707 (2000) [1] contains some errors which were identified in the ITU. A corrigendum to the Recommendation [G.707 Corr.1p] [2] has been published by the ITU. Refer to annex A. [2] ITU-T Recommendation G.707 Corrigendum 1 (2001). [3] ITU-T Recommendation G.702: "Digital hierarchy bit rates". 3 Definitions, abbreviations and conventions 3.1 Definitions For the purposes of the present document, the definitions given in clause 3 of ITU-T Recommendation G.707 [1] apply. NOTE: In ITU-T Recommendation G.707 [1], clause 3.15, the number of the information bits k is wrongly defined. Refer to annex A. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: AIS Alarm Indication Signal APS Automatic Protection Switching ATM Asynchronous Transfer Mode AU-n Administrative Unit-n AUG Administrative Unit Group BIP-X Bit Interleaved Parity-X CRC-N Cyclic Redundancy Check-N DCC Data Communication Channel DQDB Distributed Queue Dual Bus FDDI Fibre Distributed Data Interface FEC Forward Error Correction HDLC High-level Data Link Control MS-RDI Multiplex Section Remote Defect Indication MS-REI Multiplex Section Remote Error Indication MSF-AIS Multiplex Section FEC Alarm Indication Signal SIST EN 300 147 V1.4.1:2003

ETSI ETSI EN 300 147 V1.4.1 (2001-09)6 NDF New Data Flag NNI Network Node Interface POH Path OverHead RDI Remote Defect Indication SDH Synchronous Digital Hierarchy SOH Section OverHead STM(-N) Synchronous Transport Module (-N) TU-n Tributary Unit-n TUG(-n) Tributary Unit Group (-n) VC-n Virtual Container-n 3.3 Conventions The order of transmission of information in all diagrams in ITU-T Recommendation G.707 [1] is first from left to right and then from top to bottom. Within each byte, the most significant bit is transmitted first. The most significant bit (bit 1) is illustrated at the left in all diagrams. In clauses 4 to 10, the status of each requirement is given with reference to ITU-T Recommendation G.707 [1] with the following conventions: Normative (N): Requirements with which it is necessary to comply in order to be able to claim compliance with the present document. Not Relevant (N/R): Clause (of ITU-T Recommendation G.707 [1]) is not relevant to the present document. The present document is not an equipment specification. The fact that a requirement is defined as normative does not imply that the associated function has to be implemented but means that, if implemented, the function shall be implemented in accordance with this requirement. SIST EN 300 147 V1.4.1:2003

ETSI ETSI EN 300 147 V1.4.1 (2001-09)7 4 Basic multiplexing principles The basic multiplexing principles are as given in clause 6 of ITU-T Recommendation G.707 [1] together with the following statements and modifications. Table 1: Modifications and statements to clause 6 of ITU-T Recommendation G.707 [1] Clause Title Statement 6 Basic Multiplexing principles N/R 6.1 Multiplexing structure
The basic SDH multiplexing structure shall be as described in figure 1. This SDH multiplexing structure is a subset of the SDH multiplexing structure defined in the clause 6.1 of ITU-T Recommendation G.707 [1]
6.2 Basic frame structure
6.2.1 Section overhead N 6.2.2 Administrative Unit pointers N 6.2.3 Administrative Units in the STM-N N
In this clause, reference to AU-3 is N/R
6.2.4 Maintenance signals N 6.2.4.1 Alarm Indication Signals
6.2.4.1.1 MS-AIS N 6.2.4.1.2 MSF-AIS
6.2.4.1.3 AU/TU-AIS N 6.2.4.1.4 VC-AIS N 6.2.4.2 Unequipped VC-n signal
6.2.4.2.1 Case of network supporting the transport of Tandem Connection signals N 6.2.4.2.2 Case of network not supporting the transport of Tandem Connection signals N/R 6.2.4.3 Supervisory-unequipped VC-n signal
6.2.4.3.1 Case of network supporting the transport of Tandem Connection signals N 6.2.4.3.2 Case of network not supporting the transport of Tandem Connection signals N/R 6.3 Hierarchical bit rates N 6.4 Interconnection of STM-Ns N 6.5 Scrambling (see note) N 6.6 Physical specification of the NNI N NOTE: Figures 9-2 to 9-7 of ITU-T Recommendation G.707 [1] could lead to misinterpretation of the unscrambled bytes. Refer to annex A.
ETSI ETSI EN 300 147 V1.4.1 (2001-09)8 5 Multiplexing method The multiplexing method is as given in clause 7 of ITU-T Recommendation G.707 [1] together with the following statements and modifications. Table 2: Modifications and statements to clause 7 of ITU-T Recommendation G.707 [1] Clause Title Statement 7 Multiplexing method
7.1 Multiplexing of Administrative Units into STM-N
7.1.1 Multiplexing of Administrative Unit Groups (AUGs) into STM-N N 7.1.1.1 Multiplexing of AUG-N into STM-N, N=(1, 4, 16, 64, 256) N 7.1.1.2 Multiplexing of AUG-Ns into AUG-4xN N 7.1.2 Multiplexing of an AU-4 via AUG-1 N 7.1.3 Multiplexing of AU-3s via AUG-1 N/R 7.1.4 Multiplexing of AU-3 into STM-0 N 7.2 Multiplexing of Tributary Units into VC-4 and VC-3
7.2.1 Multiplexing of Tributary Unit Group-3s (TUG-3s) into a VC-4 N 7.2.2 Multiplexing of a TU-3 via TUG-3 N 7.2.3 Multiplexing of TUG-2s via a TUG-3 N 7.2.4 Multiplexing of TUG-2s into a VC-3 N/R 7.2.5 Multiplexing of a TU-2 via TUG-2s N 7.2.6 Multiplexing of TU-1s via TUG-2s N 7.3 AU-n/TU-n numbering scheme N 7.3.1 Numbering of AU-ns (VC-ns) in a STM-256 N
In this clause, reference to AU-3 is N/R
7.3.1.1 Numbering of AU-4s (VC-4s) in a STM-256 N 7.3.1.2 Numbering of AU-3s (VC-3s) in a STM-256 N/R 7.3.1.3 Numbering of AU-4-4cs (VC-4-4cs) in a STM-256 N 7.3.1.4 Numbering of AU-4-16cs (VC-4-16cs) in a STM-256 N 7.3.1.5 Numbering of AU-4-64cs (VC-4-64cs) in a STM-256 N 7.3.1.6 Numbering of an AU-4-256c in an STM-256 N 7.3.2 Numbering of AU-ns (VC-ns) in a STM-64 N
In this clause, reference to AU-3 is N/R
7.3.2.1 Numbering of AU-4s (VC-4s) in a STM-64 N 7.3.2.2 Numbering of AU-3s (VC-3s) in a STM-64 N/R 7.3.2.3 Numbering of AU-4-4cs (VC-4-4cs) in a STM-64 N 7.3.2.4 Numbering of AU-4-16cs (VC-4-16cs) in a STM-64 N 7.3.2.5 Numbering of an AU-4-64c in an STM-64 N 7.3.3 Numbering of AU-ns (VC-ns) in a STM-16 N
In this clause, reference to AU-3 is N/R
7.3.3.1 Numbering of AU-4s (VC-4s) in a STM-16 N 7.3.3.2 Numbering of AU-3s (VC-3s) in a STM-16 N/R 7.3.3.3 Numbering of AU-4-4cs (VC-4-4cs) in a STM-16 N 7.3.3.4 Numbering of AU-4-16c in an STM-16 N 7.3.4 Numbering of AU-ns (VC-ns) in a STM-4 N
In this clause, reference to AU-3 is N/R
7.3.4.1 Numbering of AU-4s (VC-4s) in a STM-4 N 7.3.4.2 Numbering of AU-3s (VC-3s) in a STM-4 N/R 7.3.4.3 Numbering of an AU-4-4c in an STM-4 N 7.3.5 Numbering of AU-4 (VC-4) in an STM-1 signal N 7.3.6 Numbering of AU-3 (VC-3) in an STM-0 signal N 7.3.7 Numbering of TU-3s in a VC-4 N 7.3.8 Numbering of TU-2s in a VC-4 N 7.3.9 Numbering of TU-12s in a VC-4 N 7.3.10 Numbering of TU-11s in a VC-4 N/R 7.3.11 Numbering of TU-2s in a VC-3 N/R 7.3.12 Numbering of TU-12s in a VC-3 N/R 7
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