ETSI EN V1.1.1 ( )

Transcription

1 EN V1.1.1 ( ) European Standard (Telecounications series) Transission and Multiplexing (TM); Generic requireents for synchronization networks; Part 4-2: Tiing characteriztics of slave clocks suitable for synchronization supply to Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) equipent; Ipleentation Conforance Stateent (ICS) profora specification

2 2 EN V1.1.1 ( ) Reference DEN/TM Keywords ICS, synchronization, transission, SDH, PDH, testing Postal address F Sophia Antipolis Cedex - FRANCE Office address 650 Route des Lucioles - Sophia Antipolis Valbonne - FRANCE Tel.: Fax: Siret N NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N 7803/88 Internet secretariat@etsi.fr Individual copies of this deliverable can be downloaded fro If you find errors in the present docuent, send your coent to: editor@etsi.fr Iportant notice This deliverable ay be ade available in ore 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 Docuent Forat (PDF). In case of dispute, the reference shall be the printing on printers of the PDF version kept on a specific network drive within Secretariat. Copyright Notification No part ay be reproduced except as authorized by written perission. The copyright and the foregoing restriction extend to reproduction in all edia. European Telecounications Standards Institute All rights reserved.

3 3 EN V1.1.1 ( ) Contents Intellectual Property Rights...4 Foreword...4 Introduction Scope References Definitions, sybols and abbreviations Definitions Sybols Abbreviations Conforance to this ICS profora specification...8 Annex A (norative): ICS profora guidance...9 A.1 Guidance for copleting the ICS profora...9 A.1.1 Purposes and structure...9 A.1.2 Abbreviations and conventions...9 A.1.3 Instructions for copleting the ICS profora...11 Annex B (norative): ICS profora for EN , Tiing characteristics of slave clocks for synchronization supply to SDH and PDH equipent...12 B.1 Identification of the ipleentation...12 B.1.1 Date of the stateent...12 B.1.2 Ipleentation Under Test (IUT) identification...12 B.1.3 Syste Under Test (SUT) identification (if appropriate)...12 B.1.4 Product supplier...13 B.2 Identification of the EN...13 B.3 Global stateent of conforance...13 B.4 SSU ICS profora...14 B.4.1 SSU description...14 B SSU interface description...14 B.4.2 SSU input tolerance...14 B.4.3 SSU output noise generation in locked ode...16 B.4.4 SSU transfer characteristic...16 B.4.5 SSU transient response and holdover perforance...17 History...18

4 4 EN V1.1.1 ( ) Intellectual Property Rights IPRs essential or potentially essential to the present docuent ay have been declared to. The inforation pertaining to these essential IPRs, if any, is publicly available for ebers and non-ebers, and can be found in SR : "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to in respect of standards", which is available fro the Secretariat. Latest updates are available on the Web server ( Pursuant to the IPR Policy, no investigation, including IPR searches, has been carried out by. No guarantee can be given as to the existence of other IPRs not referenced in SR (or the updates on the Web server) which are, or ay be, or ay becoe, essential to the present docuent. Foreword This European Standard (Telecounications series) has been produced by Technical Coittee Transission and Multiplexing (TM). Part 1-1: Part 2-1: Part 3-1: Part 4-1: Part 4-2: Part 5-1: Part 6-1: Part 6-2: Part 7-1: "Definitions and terinology for synchronization networks"; "Synchronization network architecture"; "The control of jitter and wander within synchronization networks"; "Tiing characteristics of slave clocks suitable for synchronization supply to Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) equipent"; "Tiing characteristics of slave clocks suitable for synchronization supply to Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) equipent; Ipleentation Conforance Stateent (ICS) profora specification"; "Tiing characteristics of slave clocks suitable for operation in Synchronous Digital Hierarchy (SDH) equipent"; "Tiing characteristics of priary reference clocks"; "Tiing characteristics of priary reference clocks; Ipleentation Conforance Stateent (ICS) profora specification"; "Tiing characteristics of slave clocks suitable for synchronization supply to equipent in local node applications". Parts 1-1, 2-1, 3-1, 4-1, 5-1 and 6-1 have been published as EN Parts 1-1, 2-1, 3-1, 4-1, 5-1 and 6-1, respectively. All previous ETSs have been withdrawn. National transposition dates Date of adoption of this EN: 10 Deceber 1999 Date of latest announceent of this EN (doa): 31 March 2000 Date of latest publication of new National Standard or endorseent of this EN (dop/e): 30 Septeber 2000 Date of withdrawal of any conflicting National Standard (dow): 30 Septeber 2000

5 5 EN V1.1.1 ( ) Introduction To evaluate conforance of a particular ipleentation, it is necessary to have a stateent of which capabilities and options have been ipleented for a telecounication specification. Such a stateent is called an Ipleentation Conforance Stateent (ICS). The ICS profora is not another coplete description of the related specification, but rather a copact for of its static conforance requireents, to be used by the test laboratory to identify which test shall be perfored on a given ipleentation. Not every feature of a profile specification is contained in the related ICS profora. For particular cases requiring specific inforation the ICS can refer to the appropriate clause of the related specification by eans of references, notes and or coents.

6 6 EN V1.1.1 ( ) 1 Scope The present docuent provides the Ipleentation Conforance Stateent (ICS) profora specification for the synchronization network generic requireents defined in EN [4] in copliance with the relevant requireents, and in accordance with the relevant guidance given in ISO/IEC [9] and ETS [7]. 2 References The following docuents contain provisions, which through reference in this text, constitute provisions of the present docuent. References are either specific (identified by date of publication, edition nuber, version nuber, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the sae nuber. [1] EN : "Transission and Multiplexing (TM); Generic requireents for synchronisation networks; Part 1: Definitions and terinology for synchronisation networks". [2] EN : "Transission and Multiplexing (TM); Generic requireents for synchronization networks; Part 2-1: Synchronization network architecture". [3] EN : "Transission and Multiplexing (TM); Generic requireents for synchronization networks; Part 3-1: The control of jitter and wander within synchronization networks". [4] EN : "Transission and Multiplexing (TM); Generic requireents for synchronization networks; Part 4-1: Tiing characteristics of slave clocks suitable for synchronization supply to Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) equipent". [5] EN : "Transission and Multiplexing (TM); Generic requireents for synchronization networks; Part 5-1: Tiing characteristics of slave clocks suitable for operation in Synchronous Digital Hierarchy (SDH) equipent". [6] EN : "Transission and Multiplexing (TM); Generic requireents for synchronization networks; Part 6-1: Tiing characteristics of priary reference clocks". [7] ETS (1995): "Methods for testing and Specification (MTS); Protocol and profile conforance testing specifications; Standardization ethodology". [8] ISO/IEC (1994): "Inforation technology - Open Systes Interconnection - Conforance testing ethodology and fraework - Part 1: General concepts". [9] ISO/IEC (1995): "Inforation technology - Open Systes Interconnection - Conforance testing ethodology and fraework - Part 7: Ipleentation Conforance Stateents". [10] ITU-T Recoendation O.172: "Jitter and wander easuring equipent for digital systes which are based on the synchronous digital hierarchy (SDH)".

7 7 EN V1.1.1 ( ) 3 Definitions, sybols and abbreviations 3.1 Definitions For the purposes of the present docuent, the following ters and definitions apply: - ters defined in EN [1] to [6]; - ters defined in ISO/IEC [8] and in ISO/IEC [9]. In particular, the following ters defined in ISO/IEC [8] apply: Ipleentation Conforance Stateent (ICS): stateent ade by the supplier of an ipleentation or syste claied to confor to a given specification, stating which capabilities have been ipleented. The ICS can take several fors: protocol ICS, profile ICS, profile specific ICS, inforation object ICS, etc ICS profora: docuent, in the for of a questionnaire, which when copleted for an ipleentation or syste becoes an ICS 3.2 Sybols For the purposes of the present docuent, the following sybols apply: K τ Kelvin Tau 3.3 Abbreviations For the purposes of the present docuent, the following abbreviations apply: ICS IUT MTIE PDH pp SASE SCS SDH SSU STM-N SUT TDEV UI UIpp Ipleentation Conforance Stateent Ipleentation Under Test Maxiu Tie Interval Error Plesiochronous Digital Hierarchy parts per illion Stand Alone Synchronization Equipent Syste Conforance Stateent Synchronous Digital Hierarchy Synchronization Supply Unit Synchronous Transport Module-N Syste Under Test Tie DEViation Unit Interval Unit Interval peak to peak A full list of abbreviations used in tiing and synchronization is listed in EN [1].

8 8 EN V1.1.1 ( ) 4 Conforance to this ICS profora specification If it clais to confor to the present docuent, the actual ICS profora to be filled in by a supplier shall be technically equivalent to the text of the ICS profora given in annex A, and shall preserve the nubering/naing and ordering of the profora ites. An ICS, which confors to the present docuent shall be a conforing ICS profora copleted in accordance with the guidance for copletion given in clause A.1. Instruentation in accordance with ITU-T Recoendation O.172 [10] is appropriate for verifying conforance to these specifications.

9 9 EN V1.1.1 ( ) Annex A (norative): ICS profora guidance Notwithstanding the provisions of the copyright clause related to the text of the present docuent, grants that users of the present docuent ay freely reproduce the ICS profora in this annex so that it can be used for its intended purposes and ay further publish the copleted ICS. A.1 Guidance for copleting the ICS profora A.1.1 Purposes and structure The purpose of this ICS profora is to provide a echanis whereby a supplier of an ipleentation of the requireents defined in EN ay provide inforation about the ipleentation in a standardized anner. The ICS profora is subdivided into subclauses for the following categories of inforation: - guidance for copleting the ICS profora; - identification of the ipleentation; - identification of the EN; - global stateent of conforance. A.1.2 Abbreviations and conventions The ICS profora contained in annexes of the present docuent is coprised of inforation in tabular for in accordance with the guidelines presented in ISO/IEC Ite colun The ite colun contains a nuber which identifies the ite in the table. Ite description colun The ite description colun describes in free text each respective ite (e.g. paraeters, tiers, etc.). It iplicitly eans "is <ite description> supported by the ipleentation?". Status colun The following notations, defined in ISO/IEC , are used for the status colun: o n/a x o.i ci andatory - the capability is required to be supported. optional - the capability ay be supported or not. not applicable - in the given context, it is ipossible to use the capability. prohibited (excluded) - there is a requireent not to use this capability in the given context. qualified optional - for utually exclusive or selectable options fro a set. "i" is an integer which identifies an unique group of related optional ites and the logic of their selection which is defined iediately following the table. conditional - the requireent on the capability ("", "o", "x" or "n/a") depends on the support of other optional or conditional ites. "i" is an integer identifying an unique conditional status expression which is defined iediately following the table.

10 10 EN V1.1.1 ( ) Reference colun The reference colun akes reference to EN , except where explicitly stated otherwise. Support colun The support colun shall be filled in by the supplier of the ipleentation. The following coon notations, defined in ISO/IEC , are used for the support colun: Y or y N or n N/A, n/a or - supported by the ipleentation not supported by the ipleentation no answer required (allowed only if the status is n/a, directly or after evaluation of a conditional status) If this ICS profora is copleted in order to describe a ultiple-profile support in a syste, it is necessary to be able to answer that a capability is supported for one profile and not supported for another. In that case, the supplier shall enter the unique reference to a conditional expression, preceded by "?" (e.g.?3). This expression shall be given in the space for coents provided at the botto of the table. It uses predicates defined in the SCS, each of which refers to a single profile and which takes the value TRUE if and only if that profile is to be used. EXAMPLE:?3: IF prof1 THEN Y ELSE N It is also possible to provide a coent to an answer in the space provided at the botto of the table. Values allowed colun The values allowed colun contains the type, the list, the range, or the length of values allowed. The following notations are used: - range of values: <in value>... <ax value> exaple: list of values: <value1>, <value2>,..., <valuen> exaple: 2, 4, 6, 8, 9 exaple: '1101'B, '1011'B, '1111'B exaple: '0A'H, '34'H, '2F'H - list of naed values: <nae1>(<val1>), <nae2>(<val2>),..., <naen>(<valn> exaple: reject(1), accept(2) - length: size (<in size>... <ax size>) Values supported colun exaple: size (1... 8) The values supported colun shall be filled in by the supplier of the ipleentation. In this colun, the values or the ranges of values supported by the ipleentation shall be indicated. References to ites For each possible ite answer (answer in the support colun) within the ICS profora a unique reference exists, used, for exaple, in the conditional expressions. It is defined as the table identifier, followed by a solidus character "/", followed by the ite nuber in the table. If there is ore than one support colun in a table, the coluns are discriinated by letters (a, b, etc.), respectively. EXAMPLE 1: A.5/4 is the reference to the answer of ite 4 in table 5 of annex A. EXAMPLE 2: A.6/3b is the reference to the second answer (i.e. in the second support colun) of ite 3 in table 6 of annex A.

11 11 EN V1.1.1 ( ) Prerequisite line A prerequisite line takes the for: Prerequisite: <predicate>. A prerequisite line after a clause or table title indicates that the whole clause or the whole table is not required to be copleted if the predicate is FALSE. A.1.3 Instructions for copleting the ICS profora The supplier of the ipleentation shall coplete the ICS profora in each of the spaces provided. In particular, an explicit answer shall be entered, in each of the support colun boxes provided, using the notation described in subclause A.1.2. If necessary, the supplier ay provide additional coents in space at the botto of the tables, or separately on sheets of paper. More detailed instructions are given at the beginning of the different subclauses of the ICS profora.

12 12 EN V1.1.1 ( ) Annex B (norative): ICS profora for EN , Tiing characteristics of slave clocks for synchronization supply to SDH and PDH equipent Notwithstanding the provisions of the copyright clause related to the text of the present docuent, grants that users of the present docuent ay freely reproduce the ICS profora in this annex so that it can be used for its intended purposes and ay further publish the copleted ICS. B.1 Identification of the ipleentation In the present docuent, an Ipleentation Under Test (IUT) refers to an Synchronisation Supply Unit (SSU). An SSU can exist as a separate piece of equipent - Stand-Alone Synchronisation Supply Equipent (SASE) or it can for a logical function within another piece of equipent, for exaple a telephony exchange or SDH crossconnect. In the latter case, the piece of equipent within which the SSU function resides is the Syste Under Test (SUT). Identification of the IUT and the SUT in which it resides should be filled in so as to provide as uch detail as possible regarding version nubers and configuration options. The product supplier inforation and client inforation should both be filled in if they are different. A person who can answer queries regarding inforation supplied in the ICS should be naed as the contact person. B.1.1 Date of the stateent B.1.2 Ipleentation Under Test (IUT) identification IUT nae: IUT version: B.1.3 Syste Under Test (SUT) identification (if appropriate) SUT nae: Hardware configuration:

13 13 EN V1.1.1 ( ) Operating syste: B.1.4 Product supplier Nae: Address: Telephone nuber: Facsiile nuber: E-ail address: Additional inforation: B.2 Identification of the EN This ICS profora applies to the following standard: EN : "Transission and Multiplexing (TM); Generic requireents for synchronization networks; Part 4-1: Tiing characteristics of slave clocks suitable for synchronization supply to Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) equipent". B.3 Global stateent of conforance Are all andatory capabilities ipleented? (Yes/No)... NOTE: Answering "No" to this question indicates non-conforance to the EN specification. Non-supported andatory capabilities are to be identified in the ICS, with an explanation of why the ipleentation is non-conforing, on pages attached to the ICS profora. Answering "Yes" to this question indicates only that all the capabilities with the explicit status "" are supported. It is not necessary to fill in the support colun of the associated ite.

14 14 EN V1.1.1 ( ) B.4 SSU ICS profora B.4.1 SSU description Table B.1: SSU description Ite SSU function Reference Status Support 1 The SSU supports one or ore input external synchronization 1,10 interfaces of one or ore of the following types: khz, kbit/s, or STM-N traffic 2 The SSU supports one or ore output external 1,10 synchronization interfaces of one or ore of the following types: khz, kbit/s, or STM-N traffic 3 The SSU is capable of aintaining operation (holdover) in the event all external tiing references fail 1 B SSU interface description Table B.2: SSU input interface description Ite SSU input interface Reference Status Support 1 The SSU supports an input external synchronization interface 1,10 o.201 type of khz 2 The SSU supports an input external synchronization interface 1,10 o.201 type of kbit/s 3 The SSU supports an input external synchronization interface 1,10 o.201 type of STM-N 4 The SSU supports ore than one input reference 1 o o.201: It is andatory to support at least one of these ites Table B.3: SSU output interface description Ite SSU output interface Reference Status Support 1 The SSU supports an output external synchronization interface 1,10 o.301 type of khz 2 The SSU supports an output external synchronization interface 1,10 o.301 type of kbit/s 3 The SSU supports an output external synchronization interface 1,10 o.301 type of STM-N o.301: It is andatory to support at least one of these ites B.4.2 SSU input tolerance Table B.4: SSU input tolerance: pull-in, pull-out, loss-of-input Ite SSU input tolerance Reference Status Support 1 The iniu pull-in range shall be ±0,01 pp, whatever the 5 internal oscillator frequency offset ay be. 2 The iniu pull-out range (under study) 5 n/a 3 The SSU is capable of aintaining operation (holdover) in the event all external tiing references fail 1

15 15 EN V1.1.1 ( ) Table B.5: SSU input jitter tolerance Ite SSU input jitter tolerance Reference Status Support 1 Jitter defined by the liits in EN Table 5 and 7 Figure 3 shall be accoodated while aintaining the clock within prescribed perforance liits set in EN subclause Jitter defined by the liits in EN Table 5 and 7 Figure 3 shall be accoodated without causing any alars 3 Jitter defined by the liits in EN Table 5 and Figure 3 shall be accoodated without causing the clock to switch references 4 Jitter defined by the liits in EN Table 5 and Figure 3 shall be accoodated without causing the clock to go into holdover c501: IF B.2/4 THEN ELSE n/a -- B.2/4: ore than one input supported Table B.6: SSU input wander tolerance Ite SSU input wander tolerance Reference Status Support 1 Wander defined by the liits in EN Table 6 and 7 Figure 4 shall be accoodated while aintaining the clock within prescribed perforance liits set in EN [3] subclause Wander defined by the liits in EN Table 6 and 7 Figure 4 shall be accoodated without causing any alars 3 Wander defined by the liits in EN Table 6 and Figure 4 shall be accoodated without causing the clock to switch references 4 Wander defined by the liits in EN Table 6 and Figure 4 shall be accoodated without causing the clock to go into holdover 5 Wander defined by the liits in EN Table 7 and Figure 5, which can be tested using test signals described in Table 8 and Figure 6, shall be accoodated while aintaining the clock within prescribed perforance liits set in EN subclause Wander defined by the liits in EN Table 7 and Figure 5, which can be tested using test signals described in Table 8 and Figure 6, shall be accoodated without causing any alars 7 Wander defined by the liits in EN Table 7 and Figure 5, which can be tested using test signals described in Table 8 and Figure 6, shall be accoodated without causing the clock to switch references 8 Wander defined by the liits in EN Table 7 and Figure 5, which can be tested using test signals described in Table 8 and Figure 6, shall be accoodated without causing the clock to go into holdover c601: IF B.2/4 THEN ELSE n/a -- B.2/4: ore than one input supported c501 c601 c601

16 16 EN V1.1.1 ( ) B.4.3 SSU output noise generation in locked ode Table B.7: SSU output noise generation in locked ode of operation Ite SSU locked-ode output noise generation Reference Status Support 1 The intrinsic jitter at SSU outputs of khz and kbit/s easured over 60 seconds shall not exceed 0,05 UIpp when easured through a band-pass filter with corner frequencies at 20 Hz and 100 khz each with a 20 db/decade roll-off characteristic c701 2 The intrinsic jitter at SSU outputs at STM-N interfaces easured over 60 seconds shall not exceed the liits given in EN Table 4 3 The wander generated at SSU outputs with the teperature constant to ±1 K shall not exceed the TDEV liits defined in EN Table 1 and Figure 1 4 The wander generated at SSU outputs with the teperature constant to ±1 K shall not exceed the MTIE liits defined in EN Table 2 and Figure 2 5 The wander generated at SSU outputs with teperature effects included shall not exceed the MTIE liits defined in EN Table 2, Figure 2, and Table 3 with a 1 µs liit for observation periods greater then seconds c701: IF B.3/1 OR B.3/2 THEN ELSE n/a -- B.3/1 OR B.3/2: khz OR kbit/s outputs supported c702: IF B.3/3 THEN ELSE n/a -- B.3/3: STM-N output supported c702 B.4.4 SSU transfer characteristic Table B.8: SSU transfer characteristic Ite SSU transfer characteristic Reference Status Support 1 The SSU bandwidth is liited to a axiu of 3 Hz 8 2 Wander defined by the liits in EN Table 7 and 7 Figure 5 shall produce an output signal that lies within the liits specified in EN Table 9 and Figure The phase gain of the SSU in the passband is less than 0,2 db 8

17 17 EN V1.1.1 ( ) B.4.5 SSU transient response and holdover perforance Table B.9: SSU transient response and holdover perforance Ite SSU transient response and holdover perforance Reference Status Support 1 In the event of input reference switching, the SSU output 9 c901 phase variation, relative to the input reference before it was lost, shall be bounded by the requireents specified in EN Figure 8 2 During holdover, the phase error at the SSU output relative to the input at the oent of loss of reference shall not exceed the liit defined in EN subclause The SSU response to input signal interruptions is to be defined 9 n/a 4 For internal disturbances such as ajor hardware failures, the phase variation on khz and kbit/s outputs over any period S up to 1 s shall not exceed 60 ns 5 For internal disturbances such as ajor hardware failures, the phase variation on khz and kbit/s outputs over any period S up to 4 s shall not exceed 120 ns 6 For internal disturbances such as ajor hardware failures, the phase variation on khz and kbit/s outputs over any period S greater than 4 s shall not exceed 240 ns 7 For internal disturbances such as ajor hardware failures, the teporary frequency offset on STM-N outputs shall not exceed 7,5 pp c901: IF B.2/4 THEN ELSE n/a -- B.2/4: ore than one input supported c902: IF B.3/1 OR B.3/2 THEN ELSE n/a -- B.3/1 OR B.3/2: khz OR kbit/s outputs supported c903: IF B.3/3 THEN ELSE n/a -- B.3/3: STM-N output supported c902 c902 c902 c903

18 18 EN V1.1.1 ( ) History Docuent history V1.1.1 January 1999 Public Enquiry PE 9918: to V1.1.1 October 1999 Vote V 9951: to V1.1.1 Deceber 1999 Publication