1、STD-DIN DIN ETS 30b7-GERM 1977 m 279444b Obb7580 721 I DEUTSCHE NORM November 1997 - I ETS 300678 ISDN Teledienst “Videokonferenz” Dienstbeschreibung Enalische Fassuna ETS 300678 : 1996 ICs 33.080; 33.160.60 Deskriptoren: Telekommunikation, ISDN, Teledienst, Videokonferenz, Beschreibung Integrated S
2、ervices Digital Network (ISDN) - Videoconference teleservice - Service description; English version ETS 300678 : 1996 Die Europische Telekommunikationsnorm ETS 300678 : 1996 hat den Status einer Deutschen Norm. Nationales Vorwort Die vorliegende Norm ist auf der Grundlage der vom Europischen Institu
3、t fr Telekommunikationsnormen (ETSI) herausgegebenen Europischen Telekommunikationsnorm ETS 300678, Ausgabe November 1996, “Integrated Services Digital Network (ISDN) - Videoconference teleservice - Service description”, verffentlicht worden. Diese Norm enthlt unter Bercksichtigung des DIN-Prsidialb
4、eschlusses 13/1983 den englischen Originaltext der vom Technischen Unterkomitee TE 4 des ETSI erarbeiteten ETC 300678. Fachlich zustndig in Deutschland ist das Unterkomitee 723.3 “Telekommunikationsendgerte” der Deutschen Elektrotechnischen Kommission im DIN und VDE (DKE). Fortsetzung 27 Seiten ETS-
5、Original Deutsche Elektrotechnische Kommission im DIN und VDE (DKE) 0 DIN Deutsches Institut fr Normung e.V. . Jede Art der Vervielfltigung, auch auszugsweise, Alleinverkauf der Normen durch Beuth Verlag GmbH. 10772 Berlin nur mit Genehmigung des DIN Deutsches Institut fr Normung e.V., Berlin, gesta
6、ttet. Ref. Nr. DIN ETS 300678 : 1997-11 Preisgr. 11 Verir.-Nr. 1711 STD.DIN DIN ETS 300b7-GERM 1997 27944qb Obb45L bbd t UROPEAN lr 1 ELECOMMUNICATION STANDARD ETS 300 678 November 1996 I Source: ETSI TC-TE Reference: DEITE-04030 ICs: 33.080 Key words: Conference, ISDN, stage 1, video Integrated Ser
7、vices Digital Network (ISDN); Videoconference teleservice; Service description ETSI European Telecommunications Standards Institute ETSI Secretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Ofice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atl
8、as, p=etsi, c=secretariat - Internet: secretariatetsi.fr Tel.: +33 4 92 94 42 O0 - Fax: +33 4 93 65 47 16 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. O European Telecomm
9、unications Standards Institute 1996. All rights reserved. STD.DIN DIN ETS 300b7A-GERM 1777 277l(l(L(b Ob70332 77T Page 2 ETS 300 678: November 1996 , Whilst every care has been taken in the preparation and publication of this document, errors in content, typographical or otherwise, may occur. If you
10、 have comments concerning its accuracy, please write to “ETSI Editing and Committee Support Dept.“ at the address shown on the title page. STD-DIN DIN ETS 300b78-GERM 1997 m 279944b Ob69582 5T4 Page 3 ETS 300 678: November 1996 Contents Foreword . 5 1 2 3 4 5 6 7 a 9 io Scope 7 Normative references
11、7 Definitions 8 Abbreviations . 10 Description 10 Procedures 10 6.2 Normal procedures 11 Varying the Bchannel number during the conference 12 Terminating the conference 12 6.1 Provision and withdrawal . 10 6.2.1 Originating the call (call establishment) . 11 6.2.2 Indications during call establishme
12、nt . 12 6.2.3 6.2.4 6.2.4.1 Point-to-point conference 12 6.2.4.2 Multipoint conference . 12 Change of communication mode 12 6.2.5 6.2.6 Multipoint control . 13 6.2.7 Data communication . 13 6.3 Exceptional procedures . 13 Situations at the called user side . 13 Situations due to network conditions .
13、 13 Retention of call information 13 Failure of additional calls . 14 6.3.1 6.3.2 6.3.3 6.3.4 6.3.5 Situations at the calling user side 13 Intercommunication and interworking . 14 7.2 Fall-back procedures . 14 Restricted network operation . 15 7.1 Normal operation . 14 7.2.1 Fall-back to the telepho
14、ny 3, 1 kHz teleservice 14 7.2.2 Interworking with non-ISDNs . 15 Interworking with private ISDNs . 15 7.3 7.4 Special use of supplementary services . 15 Static description of the service using attributes . 16 9.1 16 9.2 Access attributes . 9.3 High layer attributes 17 17 9.4 General attributes Low
15、layer attributes 16 . Encryption 18 Annex A (informative): Various functionalities of the complete “videoconference service“ 19 A.l Overall description 19 A.2.1 Point-to-point configuration 19 Switched video multipoint configuration . 20 . 19 A.2 Videoconference configurations A.2.2 Page 4 ETS 300 6
16、78: November 1996 A.2.3 Multipoint configuration with picture composition 20 A.3 Conference Set-up mode 21 Annex B (informative): Applicability of supplementary services to the videoconference teleservi ce 22 B.l Hold, Transfer and Portability . 22 8.2 B.3 Multiparty supplementary services . 22 Supp
17、lementary services applicable without restriction . 22 B.4 Supplementary services applicable with restriction 22 Annex C (informative): Relation between standards and recommendations relevant for the videoconference service 24 Annex D (informative): Bibliography . 25 History . 27 STD-DIN DIN ETS 300
18、b78-GERM 1997 = 277444b Obb9584 377 II Page 5 ETS 300 678: November 1996 Foreword This European Telecommunication Standard (ETS) has been produced by the Terminai Equipment (TE) Technical Committee of the European Telecommunications Standards Institute (ETSI). Transposition dates Date of adoption of
19、 this ETS: Date of latest announcement of this ETS (doa): 25 October 1996 28 February 1997 Date of latest publication of new National Standard or endorsement of this ETS (dop/e): 31 August 1997 Date of withdrawal of any conflicting National Standard (dow): 31 August 1997 STD-DIN DIN ETS 300b78-GERM
20、1997 Y 27944qb Obb958.5 203 Page 7 ETS 300 678: November 1996 1 Scope This European Telecommunication Standard (ETS) defines the stage one of the videoconference teleservice for the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecornmunications operators.
21、Stage one is an overall service description from the users point of view (see CCITT Recommendation 1.130 in annex D), but does not deal with the details of the human interface itself. The videoconference teleservice applies to point-to-point communications established between either two terminals or
22、 one terminal and a Multipoint Control Unit (MCU). The “conference service“ provided by a MCU is outside the scope of this ETS. Related information may be found in informative annexes A and B of this ETS, and also in ITU-T Recommendation F.730 (see annex D). This ETS defines the interworking require
23、ments of private ISDNs with the public ISDN. In addition, this ETS specifies the base requirements where the service is provided to the user via a private ISDN. This ETS does not specify the additional requirements where the service is provided to the user via a telecommunications network that is no
24、t an ISDN but does include interworking requirements of other networks with the public ISDN. Charging principles are outside the scope of this ETS. The values of the general attributes are outside the scope of this ETS. The videoconference teleservice is a real-time teleservice in which high quality
25、 audio, video, control signals and data are interchanged using two or more circuit-mode 64 kbiffs connections. This ETS is applicable to the stage two and stage three standards for the ISDN videoconference teleservice. The terms “stage two“ and “stage three“ are also defined in CCITT Recommendation
26、1.130 (see annex D). Where the text indicates the status of a requirement (.e. as strict command or prohibition, as authorization leaving freedom, or as a capability or possibility), this is reflected in the text of the relevant stage two and stage three standards. Furthermore, conformance to this E
27、TS is met by conforming to the stage three standard with the field of application appropriate to the equipment being implemented concerning characteristics at the user- network interface, and by conforming to the standard on the end-to-end characteristics appropriate to the equipment being implement
28、ed. Therefore, no method of testing is provided for this ETS. 2 Norm a tive references This ETS incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For da
29、ted references, subsequent amendments to, or revisions of any of these publications apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. 131 ETS 300 144 (1 996): “Integrated Services Digital Network
30、 (ISDN); Audiovisual services; Frame structure for a 64 kbis to 1 920 kbis channel and associated syntax for inband signalling“. ETS 300 11 1 (1992): “Integrated Services Digital Network (ISDN); Telephony 3,l kHz teleservice, Service description“. ETS 300 263 (1 994): “Integrated Services Digital Ne
31、twork (ISDN); Telephony 7 kHz teleservice, Service description“. CCITT Recommendation G.728 (1992): “Coding of speech at 16 kbis using low-delay code excited linear prediction“. Previous page is blank STD-DIN DIN ETS 300678-GERfl 1777 II 2794Liqb Obb958b L4T Page 8 ETS 300 678: November 1996 151 171
32、 91 ETS 300 143 (1994): “Integrated Services Digital Network (ISDN); Audiovisual services; inband signalling procedures for audiovisual terminals using digital channels up to 2 048 kbis“. CCITT Recommendation G.711 (1985)88): “Pulse code modulation (PCM) of voice frequencies“. CCITT Recommendation G
33、.722 (1985)88): “7 kHz audio-coding within 64 kbitls“. ITU-T Recommendation 1.140 (1 985)93): “Attribute technique for the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN“. ETS 300 483 (1996): Terminal Equipment (TE); Integrated Services Digita
34、l Network (ISDN); Multipoint communications for Audiovisual Services; Main functionalities and basic requirements for Multipoint Control Units (MCUs)“. ITU-T Recommendation H.242 (1 9985)96): “System for establishing communication between audiovisual terminals using digital channels up to 2 M bis“.
35、ITU-T Recommendation H.233: “Confidentiality system for audiovisual services“. i 31 ITU-T Recommendation H.243 (1 985)93): “Procedures for establishing communication between three or more for audiovisual terminals using digital channels up to 1 920 kbis“. ETS 300 345: “Integrated Services Digital Ne
36、twork (ISDN); Interworking between public ISDNs and private ISDNs for the provision of telecommunication services. General aspects“. ITU-T Recommendation T.122 (1985)93): “Multipoint communication service for audiographics and audiovisual conferencing service definition“. ITU-T Recommendation T.123
37、(1 985)94): “Protocol stacks for audiographic and audiovisual teleconference applications“. U61 ITU-T Recommendation T. 124 (1 995): “Generic conference control“. ITU-T Recommendation T. 125 (1 994): “Multipoint communication service protocol specification“. i181 ITU-T Recommendation T. 126: “Multip
38、oint still image and annotation protocol“ i191 ITU-T Recommendation T. 127: “Multipoint binary file transfer protocol“. ITU-T Recommendation H.261: Video codec for audiovisual services at p x 64 kbis“. 3 Definitions For the purposes of this ETS, the following definitions apply: Integrated Services D
39、igital Network (ISDN): An integrated services network that provides digital connections between user-network interfaces (ITU-T Recommendation I. 112, subclause 2.3, definition 308). Channel Aggregation Unit (CAU): A device having both multiple 64 kbitls accesses and a single access at a higher bitra
40、te. Reference in this ETS to “CAU“ or “aggregator“ means equipment conforming to ETS 300 481 (cf. bibliography in annex D). STD-DIN DIN ETS 30Db78-GERM 1777 D 277Li44b Obb9587 O8b Page 9 ETS 300 678: November 1996 service; telecommunications service: That which is offered by a service provider to it
41、s customers in order to satisfy a specific telecommunication requirement (ITU-T Recommendation 1.1 12, subclause 2.2, definition 2011. supplementary service: A supplementary service modifies or supplements a basic telecommunication service. Consequently, it cannot be offered to a customer as a stand
42、alone service. It should be offered together with or in association with a basic telecommunication service. The same Supplementary service may be common to a number of telecommunication services ITU-T Recommendation 1.210, subclause 2-41. teleservice: A type of telecommunication service that provide
43、s the complete capability, including terminal equipment functions, for communication between users according to protocols established by agreement between service providers ITU-T Recommendation 1.1 12, cubclause 2.2, definition 2031. videoconference terminal: A terminal that supports the videoconfer
44、ence teleservice. 7 khz terminal: A terminal that supports the telephony 7 kHz teleservice. 3,l khz terminal: A terminal that supports only the telephony 3,l kHz teleservice. videotelephone terminal: A terminal that supports the videotelephony teleservice. fall-back: The mechanism whereby the reques
45、t for the videoconference teleservice, which includes an indication that an alternative teleservice is acceptable, results in a call using the alternative teleservice. In the case of the videoconference teleservice, the alternative teleservice is the telephony 3,l kHz teleservice. However, at the ca
46、lled side fall-back might result to the telephony 7 kHz teleservice. served user: A user to whom the videoconference teleservice is provided. Network Determined User Busy (NDUB): See description given in subclause 2.1.4 of ITU-T Recommendation 1.221. User Determined User Busy (UDUB): Is specified fo
47、r the case where the network offers the call to the user and if no compatible terminal responds “positively“ but one or more compatible terminals respond “user busy“. restricted network: A network consisting of multiples of 64 kbis links, but where only multiples of 56 kbis are usable for the termin
48、als (ETS 300 144 l). retention timer: This timer specifies the amount of time that the network retains all the call information supplied by the calling user when the call encounters busy or is terminated. Implementation of this timer is a network option. The value for this timer is greater than 15 s
49、econds. Multipoint Control Unit (MCU): A piece of equipment located in a node of the network or in a terminai that connects several terminals and, according to certain criterion, processes audiovisual signals and distributes them to the connected terminals. Its main functionalities and applicable requirements are specified in ETS 300 483 9. Service Channel (SC): The eighth sub-channel of a 64 kbis channel, or the seventh subchannel when communicating in restricted mode (ETS 300 144 i). multi layer protocols: As defined in the T.120 series of IT
