ANSI ATIS 1000643-1998 Integrated Services Digital Network (ISDN) C Explicit Call Transfer Supplementary Service.pdf
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1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-1000643.1998(R2013) Integrated Services Digital Network (ISDN) Explicit Call Transfer Supplementary Service As a leading technology and solutions development organization, ATIS brings together the top global ICT companies to advance the industr
2、ys most-pressing business priorities. Through ATIS committees and forums, nearly 200 companies address cloud services, device solutions, emergency services, M2M communications, cyber security, ehealth, network evolution, quality of service, billing support, operations, and more. These priorities fol
3、low a fast-track development lifecycle from design and innovation through solutions that include standards, specifications, requirements, business use cases, software toolkits, and interoperability testing. ATIS is accredited by the American National Standards Institute (ANSI). ATIS is the North Ame
4、rican Organizational Partner for the 3rd Generation Partnership Project (3GPP), a founding Partner of oneM2M, a member and major U.S. contributor to the International Telecommunication Union (ITU) Radio and Telecommunications sectors, and a member of the Inter-American Telecommunication Commission (
5、CITEL). For more information, visit. AMERICAN NATIONAL STANDARD Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment
6、 of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concer
7、ted effort be made towards their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures n
8、ot 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 Standar
9、d in 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
10、 the 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 D
11、isclaimer theirexistence 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 an
12、dwill in no circumstances give interpretation on 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 beaddressed to
13、 the secretariat or sponsor whose name appears on the titlepage of 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, orwithdraw
14、 this standard. Purchasers of American National Standards mayreceive current information on all standards by calling or writing the AmericanNational Standards Institute.American National StandardPublished byAmerican National Standards Institute, Inc.11 West 42nd Street, New York, NY 10036Copyright 1
15、998 by Alliance for Telecommunications 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 AmericaiContentsPageForewordii1Scope
16、, Purpose, and Application . 12Normative References 13Definitions and Acronyms. 24Definition of Explicit Call Transfer from the Users Perspective . 35Functional Capabilities and Information Flows. 116Switching and Signaling Specification at the User Network Interface 167Switching and Signaling Speci
17、fication for ECT at Interexchange Interface 278Specifications for Protocol Interworking . 32Tables1Subscription Options for ECT Service per Terminal Service Profile (TSP) or per ISDN Number/Bearer Service/TSP or per Interface. 32Allowable Conditions for Invocation of ECT . 43Allocation of Functions
18、to Equipment . 154DSS1 Messages for Support of ECT 165Valid Invocation States. 196Notification Indicator Subfield. 27Figures1Network Side SDL for ECT (AB Answered, AC Answered) 82Network Side SDL for ECT (AB Answered, AC Alerting) . 93Network Side SDL for ECT (Transferred Call Clearing) . 104Functio
19、nal Entity Model 115Information Flow Model for ECT (AB Answered, AC Answered) 136Information Flow Model for ECT (AB Answered, AC Alerting) . 147Information Flow Model for ECT (Transferred Call Clearing) . 158ECT Invocation with Both AB and AC Calls Answered 249ECT Invocation with AB Call Answered an
20、d AC Call Alerting 2510ECT Notification to Served User of Transferred Call Clearing . 2611ECT Invocation with Both Calls (AB and AC) Answered 3012ECT Invocation with Call AB Answered and Call AC Alerting 31AnnexABibliography 33iiForeword(This foreword is not part of American National Standard T1.643
21、-1998.)This is one of a series of standards on Integrated Services Digital Network (ISDN)supplementary services. This standard defines and describes the Explicit Call Trans-fer service capabilities in the context of the ISDN. This standard provides switchingand signaling specifications to allow a se
22、rved user having two independent voice-band information calls, 64-kbit/s data calls, or multi-rate (nx64 kbit/s) data calls, toconnect together the distant parties of the two calls, thereby releasing the serveduser from the call, in a single user-network interaction. The Explicit Call Transfer ser-v
23、ice allows the ISDN to notify the transferred parties of the transfer if the served usersubscribes to this capability. This standard includes the Digital Subscriber SignalingSystem No. 1 (DSS1) and the Signaling System No. 7 ISDN User Part (ISUP) proto-col and procedures to support these capabilitie
24、s.Service providers of Call Transfer services will find this standard to be useful in pro-viding a consistent suite of protocols and procedures to support the service capabili-ties in this standard. Manufacturers of user and network equipment that use theIntegrated Services Digital Network (ISDN) an
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