ETSI TS 101 319-1998 Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON) Signalling for Basic Calls from an H 323 Terminal to a Terminal in a Switched-Cir_1.pdf

1、TS 101 319 V1.6.4 (1998-12)Technical SpecificationTelecommunications and Internet ProtocolHarmonization Over Networks (TIPHON);Signalling for basic calls from an H.323 terminal to a terminalin a Switched-Circuit Network (SCN)ETSITS 101 319 V1.6.4 (1998-12)2ReferenceDTS/TIPHON-03002 (c7o00k2r.PDF)Key

2、wordsinternet, IP, signalling, telephony, voice,ETSIPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16Siret N 348 623 562 00017 - NAF 742 CAssociation but non lucratif enregistre

3、laSous-Prfecture de Grasse (06) N 7803/88Internetsecretariatetsi.frIndividual copies of this ETSI deliverablecan be downloaded fromhttp:/www.etsi.orgCopyright NotificationNo part may be reproduced except as authorized by written permission.The copyright and the foregoing restriction extend to reprod

4、uction in all media. European Telecommunications Standards Institute 1998.All rights reserved.ETSITS 101 319 V1.6.4 (1998-12)3ContentsIntellectual Property Rights5Foreword 51 Scope62 References63 Definitions and abbreviations 73.1 Definitions . 73.2 Abbreviations. 84 Entities participating in the se

5、tup of a basic call .85 Registration, call setup and call release.85.1 Overview 85.2 Security principles . 95.3 Registration 95.3.1 Registration basics 95.3.2 Authenticated registration 95.3.3 Anonymous registration . 95.3.4 Registration keep alive . 95.4 Call setup . 105.4.1 Prerequisites. 105.4.2

6、The en-bloc procedure 105.4.3 Overlap sending . 105.4.4 Establishment of media channels 105.4.4.1 Fast Connect procedure 105.4.4.2 Encapsulation of H.245 messages within H.225.0 messages 105.4.5 Dual Tone Multi Frequency (DTMF) signalling 105.4.6 Basic call setup. 115.4.7 Carrier selection . 115.5 A

7、ctive phase. 115.5.1 General aspects. 115.5.2 Exceptional cases during the active phase 115.6 Call release. 125.7 Calling Line Identification (CLI) . 12Annex A (normative): Required support of ITU-T Recommendation H.225.0 call controlprotocol.13A.1 Message definitions .13A.1.1 Alerting 13A.1.2 Infor

8、mation 14A.1.3 Release Complete 14A.1.4 Setup 14A.1.5 Setup Acknowledge . 14Annex B (normative): Interoperable security profiles.15B.1 Security Profile B.115Annex C (informative): Message flows for call setup .16C.1 Gatekeeper routed calls16C.1.1 H.323 Terminal and Gateway registered to same Gatekee

9、per, fast connect procedure, overlap procedure. 16ETSITS 101 319 V1.6.4 (1998-12)4Annex D (informative): Basic call scenario definitions.17D.1 Successful calls 17D.2 Unsuccessful calls17D.3 Call failures17D.4 Calling line identification (CLI) 17D.4.1 Presentation number. 18D.4.2 Network number 19D.5

10、 In-band information .19D.5.1 Call to operator/Non-chargeable calls 20D.5.2 IN Services. 20Bibliography.21History22ETSITS 101 319 V1.6.4 (1998-12)5Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to

11、these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respectof ETSI standards“, which is available free of charge from the ETSI Secretar

12、iat. Latest updates are available on theETSI Web server (http:/www.etsi.org/ipr).Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guaranteecan be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETS

13、I Web server)which are, or may be, or may become, essential to the present document.ForewordThis Technical Specification (TS) has been produced by ETSI Project Telecommunications and Internet ProtocolHarmonization Over Networks (TIPHON).ETSITS 101 319 V1.6.4 (1998-12)61 ScopeThe present document des

14、cribes interactions between ITU-T Recommendation H.323 10 Terminals, Gatekeepers,Gateways, and Switched-Circuit Networks (SCN) for support of TIPHON scenario 1, see TR 101 306 18.The present document specifies a profile to be applied to the ITU-T Recommendation H.323 10 for the purposes ofTIPHON com

15、pliant systems.Call trace protocols, e.g. for use in tracing malicious calls, are outside the scope of the present document.The present document is applicable to Basic Call for voice only telephone calls from an H.323 Terminal on a networkusing Internet Protocol transport to Terminals on SCNs, e.g.

16、Public Switched Telephone Network (PSTN), IntegratedServices Digital Network (ISDN) or GSM Public Land Mobile Network (PLMN).2 ReferencesThe following documents contain provisions which, through reference in this text, constitute provisions of the presentdocument. References are either specific (ide

17、ntified by date of publication, edition number, version number, etc.) ornon-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

18、an EN with the samenumber.1 EN 300 092-1: “Integrated Services Digital Network (ISDN); Calling Line IdentificationPresentation (CLIP) supplementary service; Digital Subscriber Signalling System No. one (DSS1)protocol“.2 Void.3 EN 300 403-1: “Integrated Services Digital Network (ISDN); Digital Subscr

19、iber Signalling SystemNo. one (DSS1) protocol; Signalling network layer for circuit-mode basic call control; Part 1:Protocol specification ITU-T Recommendation Q.931 (1993), modified“.4 ETS 300 659-1 (1997): “Public Switched Telephone Network (PSTN); Subscriber line protocolover the local loop for d

20、isplay (and related) services; Part 1: On hook data transmission“.5 ISO/IEC 11572 (1996): “Information Technology - Telecommunications and information exchangebetween systems - Private Integrated Services Network - Circuit mode bearer services -Inter-exchange signalling procedures and protocol“.6 IT

21、U-T Recommendation H.225.0 (1998): “Call signalling protocols and media streampacketization for packet based multimedia communication systems“.7 ITU-T Recommendation H.235 (1998): “Security and encryption for H Series (H.323 and otherH.245 based) multimedia terminals“.8 ITU-T Recommendation H.245 (1

22、998): “Control protocol for multimedia communication“.9 Void.10 ITU-T Recommendation H.323 (1998): “Packet-based multimedia communications systems“.11 ITU-T Recommendation Q.731.3 (1993): “Calling Line Identification Presentation (CLIP)“.12 ITU-T Recommendation Q.761 (1997): “Signalling System No. 7

23、 ISDN User Part functionaldescription“.ETSITS 101 319 V1.6.4 (1998-12)713 ITU-T Recommendation Q.762 (1993): “Specifications of Signalling System No. 7; GeneralFunction of Messages and Signals of the ISDN User Part of Signalling System No. 7“.14 ITU-T Recommendation Q.763 (1993): “Specifications of

24、Signalling System No. 7; Formats andCodes of the ISDN User Part of Signalling System No. 7“.15 ITU-T Recommendation Q.764 (1993):“Specifications of Signalling System No. 7; SignallingSystem No. 7 - ISDN User Part Signalling Procedures“.16 ITU-T Recommendation Q.931 (1993): “ISDN user-network interfa

25、ce layer 3 specification forbasic call control“.17 ITU-T Recommendation Q.932 (1993): “Digital Subscriber Signalling System No. 1 (DSS1) Generic procedures for the control of ISDN supplementary services“.18 TR 101 306 (1998): “Telecommunications and Internet Protocol Harmonization Over Networks(TIPH

26、ON); Requirements for service interoperability; Scenario 1“.19 TS 101 312 (1998): “Telecommunications and Internet Protocol Harmonization Over Networks(TIPHON); Network architecture and reference configurations; Scenario 1“.3 Definitions and abbreviations3.1 DefinitionsFor the purposes of the presen

27、t document, the following terms and definitions apply:access token: An octet string which may be present in Registration, Admission, and Status (RAS) messages and theSetup message. It is used to specify the identity, authorization, or other security characteristics of a network element or auser.call

28、: See “telephone call“.endpoint: An H.323 Terminal or Gateway. An endpoint can call and be called. It generates and/or terminatesinformation streams.gatekeeper: The Gatekeeper is an H.323 entity on the network that provides address translation and controls access tothe network for H.323 Terminals, G

29、ateways and Multipoint Control Units (MCU). The Gatekeeper may also provideother services to the H.323 Terminals, Gateways and MCUs such as bandwidth management and locating Gateways.gateway: An H.323 Gateway is an endpoint on the network which provides for real-time, two-way communicationsbetween H

30、.323 Terminals on the packet based network and other Terminals on a switched circuit network.H.323 Terminal: An entity which provides audio and optionally video and data communications capability inpoint-to-point or multipoint conferences in packet-based networks.telephone call: Two-way speech commu

31、nication between two users by means of Terminals via network infrastructure.ETSITS 101 319 V1.6.4 (1998-12)83.2 AbbreviationsIn addition to the abbreviations given in TR 101 306 18 and TS 101 312 19, the following abbreviations apply:ACF AdmissionConfirm (RAS message)ARJ AdmissionReject (RAS message

32、)ARQ AdmissionRequest (RAS message)CLI Calling Line IdentificationCLIP Calling Line Identification PresentationDSS1 Digital Subscriber Signalling System No. oneDTMF Dual Tone Multi FrequencyGSM Global System for Mobile communicationIN Intelligent NetworkIP Internet ProtocolISDN Integrated Services D

33、igital NetworkISUP ISDN User Part (of CCITT number 7 signalling)MCU Multipoint Control UnitsNNI Network-to-Network InterfacePLMN Public Land Mobile NetworkPSTN Public Switched Telephone NetworkRAS Registration, Admission, and StatusRCF RegistrationConfirm (RAS message)RRQ RegistrationRequest (RAS me

34、ssage)SCN Switched-Circuit NetworkUNI User-to-Network Interface4 Entities participating in the setup of a basic callThe TIPHON system is a multi-component environment system. It consists of H.323 Terminals, Gateways, andGatekeepers. For more details about these entities and the scenarios in which th

35、ey are acting, refer to TS 101 312 19.5 Registration, call setup and call release5.1 OverviewThe procedures of ITU-T Recommendations H.323 10, H.225.0 6 and H.245 8 shall apply with the limitations orextensions described in the present document. The procedures of ITU-T Recommendations H.235 7 shall

36、applyunchanged.In accordance with ITU-T Recommendation H.323 10, the protocols defined in ITU-T Recommendations H.225.0 6,H.245 8 shall be used as the protocols for call control signalling and logical channel controlling within the packetbased data network. The use of ITU-T Recommendations H.225.0 6

37、 and H.245 8 is specified in more detail in thefollowing subclauses.NOTE: ITU-T Recommendation H.225.0 defines two protocols: Registration, Admission, and Status (RAS) and aITU-T Recommendations Q.931-like protocol.Annex A describes changes to the ITU-T Recommendations Q.931 16 messages and the cont

38、ents of messages carriedby the User-to-user information element in ITU-T Recommendation H.225.0 6.The RAS protocol shall apply unchanged.The ASN.1 definitions given in annex H of ITU-T Recommendation H.225.0 6 shall be used.ETSITS 101 319 V1.6.4 (1998-12)9The precise translation of ITU-T Recommendat

39、ion H.323 10 messages to the SCN shall depend on the nature of theSCN (an ISDN, a PSTN, etc.) and the level of connectivity to be supported. This translation shall provide support, asnecessary, of:- the semantics of the protocol specified in ITU-T Recommendations Q.761 12, Q.762 13, Q.763 14,Q.764 1

40、5 and Q.931 16 with variations in implementation appropriate to the region in which the SCNoperates; or- the protocol specified in ISO/IEC 11572 5.5.2 Security principlesTIPHON compliant systems shall support security services. They are not required to always be activated.5.3 Registration5.3.1 Regis

41、tration basicsBoth H.323 Terminals and Gateways shall register with Gatekeepers. Registration shall be in accordance withITU-T Recommendation H.323 10 procedures.NOTE: Gateway performance may be enhanced if the Gatekeeper issues the PreGrantedARQ indication in theRegistrationConfirm (RCF) message on

42、 successful registration of the Gateway.Two types of registration shall be supported:- authenticated registration with the Gatekeeper;- anonymous registration with the Gatekeeper.5.3.2 Authenticated registrationAuthenticated registrations shall be in accordance with the security profiles in annex B.

43、5.3.3 Anonymous registrationIn this case the RRQ message shall not contain an access token.NOTE: The intention here is to allow certain types of call, e.g. Freephone. The types of call are service providerdependent.5.3.4 Registration keep aliveEndpoints shall support the keep alive procedure as spec

44、ified in subclauses 7.2.2 and 8.4.2 ofITU-T Recommendation H.323 10. If the registration ceases to be valid (e.g. the connection between the H.323Terminal and the Gatekeepter goes down for some reason), the Gatekeeper shall remove the registration and release allongoing calls. A new registration may

45、 be established using the procedures of ITU-T Recommendation H.323 10.ETSITS 101 319 V1.6.4 (1998-12)105.4 Call setup5.4.1 PrerequisitesCalls between users in the IP network and users in the SCN shall be setup only after successful registration according tosubclause 5.3.The sequences in annex C are

46、built on the principles described in the following subclauses.5.4.2 The en-bloc procedureIf a CALL PROC message is returned to the H.323 Terminal, the “Sending complete“ information element shall beinserted, if not already there, in the SETUP message towards the next network element (e.g. next Gatek

47、eeper or aGateway).5.4.3 Overlap sendingOn receipt of such a SETUP message, the Gatekeeper starts timer T302 (the value of timer T302 is specified inITU-T Recommendation Q.931 16) and sends a SETUP ACKNOWLEDGE message to the H.323 Terminal.The Gatekeeper shall restart timer T302 on the receipt of ev

48、ery INFORMATION message not containing a sendingcomplete indication and containing the called party information element with at least one valid character.5.4.4 Establishment of media channels5.4.4.1 Fast Connect procedureTIPHON-compliant systems shall use the Fast Connect procedure of ITU-T Recommen

49、dations H.323 10,subclause 8.1.7.NOTE 1: This includes the capability to negotiate media channels using ITU-T Recommendation H.245 or to fallback to ITU-T Recommendation H.245 signalling at any time of the call.NOTE 2: This enables in-band information to be passed prior to call establishment.5.4.4.2 Encapsulation of H.245 messages within H.225.0 messagesTIPHON-compliant systems shall support encapsulation of ITU-T Recommendation H.245 8 messages withinITU-T Recommendation H