1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-1000647.1995(R2015) Integrated Services Digital Network (ISDN) Conference Calling Supplementary Service As a leading technology and solutions development organization, ATIS brings together the top global ICT companies to advance the industrys m
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8、conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard i
9、n the name of the American National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of th
10、e American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Notice of Disc
11、laimer their existence does not in any respect preclude anyone, whether he has approvedthe standards or not, from manufacturing, marketing, purchasing, or usingproducts, processes, or procedures not conforming to the standards.The American National Standards Institute does not develop standards andw
12、ill in no circumstances give an interpretation of any American NationalStandard. Moreover, no person shall have the right or authority to issue aninterpretation of an American National Standard in the name of the AmericanNational Standards Institute. Requests for interpretations should be ad-dressed
13、 to the secretariat or sponsor whose name appears on the title pageof this standard.CAUTION NOTICE: This American National Standard may be revised orwithdrawn at any time. The procedures of the American National StandardsInstitute require that action be taken periodically to reaffirm, revise, or wit
14、hdraw this standard. Purchasers of American National Standards mayreceive current information on all standards by calling or writing the AmericanNational Standards Institute.Published byAmerican National Standards Institute11 West 42nd Street, New York, New York 10036Copyright 2005 by Alliance for T
15、elecommunications Industry SolutionsAll rights reserved.No part of this publication may be reproduced in anyform, in an electronic retrieval system or otherwise,without prior written permission of the publisher.Printed in the United States of AmericaiForeword iii1 Scope, purpose, and application 12
16、Normative references 13 Definitions and acronyms.24 Description of Conference Calling from the users perspective35 Functional capabilities and information flows for the ConferenceCalling service.106 Switching and signaling specification for the Conference Calling service at the user/network interfac
17、e 147 Switching and signaling specification for Conference Calling atinterexchange interfaces368 Specification for protocol interworking40Table1 Subscription options for Conference Calling .4Figures1 Interaction of Conference Calling with Normal Call Transfer .42 Overall SDL diagram of Conference Ca
18、lling .123 Configurations of equipment for the Conference Calling service .144 Beginning the conference from the idle state155 Beginning the conference from an active call156 Adding a call to a conference.157 Isolate a conferee from a conference .168 Reattach a conferee to a conference169 Split a co
19、nferee from a conference.1710 Disconnect a conferee by served user1711 Disconnect by conferee .1812 Terminate the conference 1813 Explicit request to float the conference.1914 Call clearing by served user when floating is allowed .1915 Call clearing by served user when floating is not allowed3116 St
20、arting the conference from the idle state .3217 Beginning a conference from an Active call 3218 Adding a call to the conference 3219 Adding a new call to the conference.3320 Adding an incoming call to the conference .33ContentsPageii21 Isolate a conferee3422 Reattach a conferee 3423 Split a conferee
21、 .3424 Drop conferee by served user 3425 Disconnect by conferee .3526 Terminate the conference 3527 Call clearing by served user when floating is allowed .3528 Call clearing by served user when floating is not allowed3529 Explicit request to float the conference.36AnnexA Bibliography 41PageiiiThis i
22、s one of a series of standards on Integrated Services Digital Network(ISDN) supplementary services. This standard defines and describes theConference Calling service capabilities in the context of the ISDN. Thisstandard provides switching and signalling specifications to allow a serveduser to establ
23、ish calls to multiple parties one at a time using normal callhandling procedures, and then to communicate simultaneously with multi-ple parties, which may also communicate among themselves. This stan-dard includes the Digital Subscriber Signalling System No. 1 (DSS1) andthe Signalling System No. 7 I
24、SDN User Part (ISUP) protocol and proce-dures to support these capabilities.Service providers of the Conference Calling supplementary service willfind this standard to be useful in providing a consistent suite of protocolsand procedures to support the service capabilities in this standard.Manufactur
25、ers of user and network equipment which use the IntegratedServices Digital Network (ISDN) and Signalling System No. 7 can applythis standard to the design and development of their products.This standard was developed by Working Groups T1S1.1 and T1S1.3 ofAccredited Standards Committee on Telecommuni
26、cations, T1.Suggestions for improvement of this standard will be welcome. Theseshould be sent to the Alliance for Telecommunications Industry Solutions,T1 Secretariat, 1200 G Street, NW, Suite 500, Washington, DC 20005.This standard was processed and approved for submittal to ANSI byAccredited Stand
27、ards Committee on Telecommunications, T1. Committeeapproval of the standard does not imply that all committee members votedfor its approval. At the time it approved this standard, AccreditedStandards Committee T1 had the following members:A. K. Reilly, ChairmanG. H. Peterson, Vice-ChairmanO. J. Guse
28、lla, Jr., SecretaryW. Zeuch, Senior EditorF. Audet, Technical EditorOrganization Represented Name of RepresentativeEXCHANGE CARRIERSAmeritech Services, Inc. Laurence A. YoungStephen P. Murphy (Alt.)Bell Atlantic.John W. SeazholtzRoger Nucho (Alt.)Bellcore.James C. StaatsE. R. Hapeman (Alt.)BellSouth
29、 Telecommunications, Inc. William J. McNamara, IIIMalcolm Threlkeld, Jr. (Alt.)Cincinnati Bell Telephone Thomas C. GrimesRenee W. Cagle (Alt.)GTE Telephone Operations .Bernard J. HarrisRichard L. Cochran (Alt.)National Telephone Cooperative Association .Joseph M. FlaniganNYNEX .James F. BaskinJim Pa
30、padopoulos (Alt.)Pacific Bell Sal R. TesoroPuerto Rico Telephone Company.Segundo RuizAlberto E. Morales (Alt.)Foreword (This foreword is not part of American National Standard T1.647-1995.)ivSouthwestern Bell Corporation C. C. BaileyJoseph Mendoza (Alt.)Sprint Local Telecommunications Division.Rober
31、t P. McCabeHarold L. Fuller (Alt.)US Telephone Association (USTA) Dennis ByrnePaul Hart (Alt.)US WESTJames L. EitelDarryl Debault (Alt.)INTEREXCHANGE CARRIERSAT 3.1 kHz Audio; 7 kHz Audio.2 Normative referencesThe following standards contain provisions which, through reference in this text, constitu
32、te provi-sions of this American National Standard. At the time of publication, the editions indicated werevalid. All standards are subject to revision, and parties to agreements based on this AmericanNational Standard are encouraged to investigate the possibility of applying the most recent edi-tion
33、s of the standards indicated below.ANSI T1.113-1995, Telecommunications Signalling System Number 7 (SS7) IntegratedServices Digital Network (ISDN) user partANSI T1.607-1990, Telecommunications Integrated Services Digital Network (ISDN) Layer 3signaling specification for circuit-switched bearer servi
34、ce for Digital Subscriber Signaling SystemNo. 1 (DSS1)1American National Standardfor Telecommunications Integrated Services Digital Network (ISDN) Conference Calling Supplementary ServiceAMERICAN NATIONAL STANDARD ANSI T1.647-1995ANSI T1.610-1994, Telecommunications Generic procedures for the contro
35、l of ISDN supple-mentary servicesANSI T1.620-1991, Telecommunications Integrated Services Digital Network (ISDN) Circuit-mode bearer service category descriptionANSI T1.650-1995, Telecommunications Integrated Services Digital Network (ISDN) Usage ofthe cause information element in Digital Subscriber
36、 Signaling System No. 1 (DSS1)ITU-T Recommendation Q.932, Generic procedures for the control of ISDN supplementary ser-vices, 19931)ITU-T Recommendation Q.950, Digital Subscriber Signalling System No. 1 (DSS1) Supplementary services protocols, structure and general principles, 19931)3 Definitions an
37、d acronymsThroughout this document, the following terminology will be used.3.1 Definitions3.1.1 network: In this description, network refers to all telecommunications equipment that hasany part in processing a call or a supplementary service for the user referred to. It may includelocal exchanges, t
38、ransit exchanges, and NT2s, but does not include non-ISDN or ISDN terminalsand is not limited to the “Public” network or any other particular set of equipment.3.1.2 service provider: This is a company, organization, administration, business, etc., thatsells, administers, charges for, etc., the servi
39、ce. The service provider may or may not be the ser-vice provider of the network.The following terms apply to participants in a Conference:3.1.3 conferee: Any party other than the conference controller is called a “conferee”.3.1.4 conference controller: When the service is invoked and the conference
40、reaches theactive state, the “served user” becomes the conference controller.3.1.5 served user: During the invocation phase, the service is under the control of the “serveduser”, i.e., the one for whom the service was subscribed or, in those cases where subscription isnot required, the one who invok
41、es the service.3.1.6 party: All participants in a conference call are considered “parties”.The following actions may be performed by the conference controller:3.1.7 drop: An action that clears the connection to a remote party.3.1.8 floating: The situation where the conference calling supplementary s
42、ervice exists withouta conference controller.3.1.9 isolate: An action that restricts communication in both directions with a participant of theconference.3.1.10 reattach: An action that re-establishes the communication with a participant of the conference.3.1.11 split: An action that creates a priva
43、te communication between the served user and aconferee. The private communication is a normal “two-party” call.The following identification mechanisms are defined for Conference Calling:3.1.12 conference ID: The served users (or controllers) reference to the conference itself.ANSI T1.647-199521) Ava
44、ilable from the American National Standards Institute, 11 West 42nd Street, New York, NY 10036.ANSI T1.647-19953.1.13 party ID: The served users (or controllers) reference to a particular party within thecontext of a call.Observe that multiple parties may be associated with a given call, e.g., a con
45、ference call. Moreover, theremay be multiple connections associated with a single party, e.g., a simultaneous voice and video call.NOTE This service description assumes that there exists only one connection to a given party.The following conference states are defined for Conference Calling:3.1.14 co
46、nference active: The state in which conference resources have been allocated to thespecified conference and at least one party has a connection to the conference. That connectioncould be either active or held.3.1.15 conference floating: The state in which the conference is active but without a con-t
47、roller. This state is possible when two or more conferees exist on an active conference and thecontroller successfully disconnects himself/herself.3.1.16 conference idle: The state prior to the receipt of a “conference invocation request”, orafter a particular conference has ended. 3.2 AcronymsASN.1
48、 Abstract Syntax Notation OneCONF Conference Calling supplementary serviceDSS1 Digital Subscriber Signaling System No. 1ID IdentificationISDN Integrated Services Digital NetworkISUP ISDN User PartLE Local ExchangeNT1 Network Termination 1NT2 Network Termination 2SDL Specification and Description Lan
49、guageSS7 Signaling System No. 7TA Terminal AdaptorTCAP Transaction Capability Application PartTE Terminal EquipmentTR Transit Exchange4 Description of Conference Calling from the users perspectiveThis clause defines Conference Calling in terms of procedures and other aspects visible to the useror users without regard to the means of implementation. It describes interworking with non-ISDNsand interactions between Conference Calling and other ISDN services. This clause provides a prosedescription and a diagrammatic description of Conference Calling in
