SIST EN 300 356-21 V4.2.1:2004
(Main)Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 21: Anonymous Call Rejection (ACR) supplementary service [ITU-T Recommendation Q.731, clause 4 (1993)]
General Information
- Abstract
To specify the ISUP V4 specific enhancements for the supplementary service Anonymous Call Rejection (ACR)
- Status
- Published
- Publication Date
- 31-Mar-2004
- Technical Committee
- SPN - Services and Protocols for Networks
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Apr-2004
- Due Date
- 01-Apr-2004
- Completion Date
- 01-Apr-2004
Overview
SIST EN 300 356-21 V4.2.1:2004 is a Slovenian national standard that aligns with the European EN 300 356-21 standard. It is part of the telecommunications series for the Integrated Services Digital Network (ISDN) and focuses on the implementation of Signalling System No.7 (SS7), specifically the ISDN User Part (ISUP) version 4 for international interfaces. This document addresses the stage three requirements for the Anonymous Call Rejection (ACR) supplementary service as referenced in ITU-T Recommendation Q.731, clause 4 (1993).
ACR enables called users to automatically reject incoming calls where the caller's line identity has been withheld, supporting privacy and security requirements in line with the European Data Protection Directive for telecommunications.
Key Topics
- Anonymous Call Rejection (ACR): Mechanism for rejecting calls where Calling Line Identification (CLI) is withheld based on the Calling Line Identification Restriction (CLIR) supplementary service.
- ISUP Version 4 Protocol Enhancements: Defines specific signalling and protocol procedures required to support ACR within SS7 networks at the international interface level.
- Service Provisioning: Includes options for network-based or user-based implementation, where the service can be applied either by the carrier’s network or by end-user equipment.
- Call Handling Procedures: Details how calls are rejected, the use of standardized causes (such as the cause value "24 - call rejected due to ACR supplementary service"), and methods for notifying originators of rejected calls.
- Compatibility and Interworking: Explains operations with non-ISDN, legacy ISDN, and private networks, including handling protocol differences and preventing unintended call rejections.
- Interaction with Other Supplementary Services: Refers to coordination with other telephony features such as CLIP (Calling Line Identification Presentation), MCID (Malicious Call Identification), and more.
Applications
The practical applications of this standard respond to both regulatory privacy needs and user expectations for managing incoming calls in ISDN and SS7-based telecommunications:
- Telecom Network Operators: Implementing automatic rejection of anonymous calls, particularly across international trunks and gateways, to comply with privacy directives.
- VoIP Gateway Providers: Ensuring international interoperability and seamless handling of withheld caller identity across heterogeneous network environments.
- Enterprise Communication Solutions: Enabling organizations to block unidentified calls at the network edge, offering enhanced call management and security.
- End-User Equipment Vendors: Supporting supplementary services like ACR in terminal devices for user-based activation or deactivation.
- Regulatory Compliance: Offering telecommunication services aligned with the pan-European data protection regulations for the privacy of communications.
Related Standards
For robust and interoperable deployment of ISDN and SS7 based ACR, adherence to related standards is recommended:
- EN 300 356-series: Comprehensive set for ISUP V4, covering both basic and supplementary services (e.g., CLIP, CLIR, COLP, MCID, CCBS, etc.).
- ITU-T Q.731, clause 4: Foundational international reference for Anonymous Call Rejection signalling requirements.
- EN 301 798: Service description for ACR within the European regulatory framework.
- EN 300 485: Specification for coding and interpretation of cause and location values in digital call signalling.
- EN 300 089: Details for the Calling Line Identification Presentation supplementary service.
- Directive 97/66/EC: European directive governing processing of personal data and privacy in the telecommunications sector.
By following SIST EN 300 356-21 V4.2.1:2004, network operators and equipment suppliers ensure effective and standardized implementation of Anonymous Call Rejection, promoting both user privacy and international interoperability in modern digital telecommunications.
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Frequently Asked Questions
SIST EN 300 356-21 V4.2.1:2004 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 21: Anonymous Call Rejection (ACR) supplementary service [ITU-T Recommendation Q.731, clause 4 (1993)]". This standard covers: To specify the ISUP V4 specific enhancements for the supplementary service Anonymous Call Rejection (ACR)
To specify the ISUP V4 specific enhancements for the supplementary service Anonymous Call Rejection (ACR)
SIST EN 300 356-21 V4.2.1:2004 is classified under the following ICS (International Classification for Standards) categories: 33.080 - Integrated Services Digital Network (ISDN). The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 356-21 V4.2.1:2004 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.Integrated Services Digital Network (ISDN); Signalling System No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface; Part 21: Anonymous Call Rejection (ACR) supplementary service [ITU-T Recommendation Q.731, clause 4 (1993)]33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)ICS:Ta slovenski standard je istoveten z:EN 300 356-21 Version 4.2.1SIST EN 300 356-21 V4.2.1:2004en01-april-2004SIST EN 300 356-21 V4.2.1:2004SLOVENSKI
STANDARD
ETSIEN300356-21V4.2.1(2001-07)EuropeanStandard(Telecommunicationsseries)IntegratedServicesDigitalNetwork(ISDN);SignallingSystemNo.7(SS7);ISDNUserPart(ISUP)version4fortheinternationalinterface;Part21:AnonymousCallRejection(ACR)supplementaryservice[ITU-TRecommendationQ.731,clause4(1993)]SIST EN 300 356-21 V4.2.1:2004
ETSIETSIEN300356-21V4.2.1(2001-07)2ReferenceDEN/SPAN-01082-21KeywordsISDN,ISUP,SS7,supplementaryservice,endorsementETSI650RoutedesLuciolesF-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 300 356-21 V4.2.1:2004
ETSIETSIEN300356-21V4.2.1(2001-07)3ContentsIntellectualPropertyRights.4Foreword.41Scope.62References.73Definitionsandabbreviations.73.1Definitions.73.2Abbreviations.84Description.85Provisionandwithdrawal.86Codingrequirements.87Statedefinitions.88Signallingprocedures.99Interactionwithothernetworks.99.1Interworkingwithnon-ISDNnetworks.99.2InterworkingwithexistingISDNnetworks.99.3InterworkingwithPrivateNetworks.910Interactionwithothersupplementaryservices.9History.10SIST EN 300 356-21 V4.2.1:2004
ETSIETSIEN300356-21V4.2.1(2001-07)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)hasbeenproducedbyETSITechnicalCommitteeServicesandProtocolsforAdvancedNetworks(SPAN).Thepresentdocumentispart21ofamulti-partdeliverablecoveringtheISDNUserPart(ISUP)version4fortheinternationalinterface,asidentifiedbelow:Part1:"Basicservices[ITU-TRecommendationsQ.761toQ.764(1999)modified]";Part2:"ISDNsupplementaryservice[ITU-TRecommendationQ.730(1999)modified]";Part3:"CallingLineIdentificationPresentation(CLIP)supplementaryservice[ITU-TRecommendationQ.731,clause3(1993)modified]";Part4:"CallingLineIdentificationRestriction(CLIR)supplementaryservice[ITU-TRecommendationQ.731,clause4(1993)modified]";Part5:"ConnectedLineIdentificationPresentation(COLP)supplementaryservice[ITU-TRecommendationQ.731,clause5(1993)modified]";Part6:"ConnectedLineIdentificationRestriction(COLR)supplementaryservice[ITU-TRecommendationQ.731,clause6(1993)modified]";Part7:"TerminalPortability(TP)supplementaryservice[ITU-TRecommendationQ.733,clause4(1993)modified]";Part8:"User-to-UserSignalling(UUS)supplementaryservice[ITU-TRecommendationQ.737,clause1(1997)modified]";Part9:"ClosedUserGroup(CUG)supplementaryservice[ITU-TRecommendationQ.735,clause1(1993)modified]";Part10:"Subaddressing(SUB)supplementaryservice[ITU-TRecommendationQ.731,clause8(1992)modified]";Part11:"MaliciousCallIdentification(MCID)supplementaryservice[ITU-TRecommendationQ.731,clause7(1997)modified]";Part12:"ConferenceCall,add-on(CONF)supplementaryservice[ITU-TRecommendationQ.734,clause1(1993)andimplementorsguide(1998)modified]";Part14:"ExplicitCallTransfer(ECT)supplementaryservice[ITU-TRecommendationQ.732,clause7(1996)andimplementorsguide(1998)modified]";Part15:"Diversionsupplementaryservice[ITU-TRecommendationQ.732,clauses2to5(1999)modified]";Part16:"CallHold(HOLD)supplementaryservice[ITU-TRecommendationQ.733,clause2(1993)modified]";Part17:"CallWaiting(CW)supplementaryservice[ITU-TRecommendationQ.733,clause1(1992)modified]";SIST EN 300 356-21 V4.2.1:2004
ETSIETSIEN300356-21V4.2.1(2001-07)5Part18:"CompletionofCallstoBusySubscriber(CCBS)supplementaryservice[ITU-TRecommendationQ.733,clause3(1997)modified]";Part19:"Three-Party(3PTY)supplementaryservice[ITU-TRecommendationQ.734,clause2(1996)andimplementorsguide(1998)modified]";Part20:"CompletionofCallsonNoReply(CCNR)supplementaryservice[ITU-TRecommendationQ.733,clause5(1999)modified]";Part21:"AnonymousCallRejection(ACR)supplementaryservice[ITU-TRecommendationQ.731,clause4(1993)]";Part31:"ProtocolImplementationConformanceStatement(PICS)proformaspecificationforbasicservices";Part32:"TestSuiteStructureandTestPurposes(TSS&TP)specificationforbasicservices";Part33:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforbasicservices";Part34:"ProtocolImplementationConformanceStatement(PICS)proformaspecificationforsupplementaryservices";Part35:"TestSuiteStructureandTestPurposes(TSS&TP)specificationforsupplementaryservices";Part36:"AbstractTestSuite(ATS)andpartialProtocolImplementationeXtraInformationforTesting(PIXIT)proformaspecificationforsupplementaryservices".InaccordancewithITU-TRecommendationI.130[1],thefollowingthreelevelstructureisusedtodescribethesupplementarytelecommunicationservicesasprovidedbyEuropeanpublictelecommunicationsoperatorsunderthepan-EuropeanIntegratedServicesDigitalNetwork(ISDN):-Stage1:isanoverallservicedescription,fromtheuser'sstand-point;-Stage2:identifiesthefunctionalcapabilitiesandinformationflowsneededtosupporttheservicedescribedinstage1;and-Stage3:definesthesignallingsystemprotocolsandswitchingfunctionsneededtoimplementtheservicedescribedinstage1.Thepresentdocumentdetailsthestagethreeaspects(signallingsystemprotocolsandswitchingfunctions)neededtosupporttheAnonymousCallRejection(ACR)supplementaryservice.Thestage1aspectsaredetailedinEN301798[3].Nostage2descriptionisprovided.NationaltranspositiondatesDateofadoptionofthisEN:13July2001DateoflatestannouncementofthisEN(doa):31October2001Date
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