1、 International Telecommunication Union ITU-T H.323TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1(03/2013) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services Systems and terminal equipment for audiovisual services Packet-based multimedia communications sys
2、tems Amendment 1: Use of Facility message to enable call transfer Recommendation ITU-T H.323 (2009) Amendment 1 ITU-T H-SERIES RECOMMENDATIONS AUDIOVISUAL AND MULTIMEDIA SYSTEMS CHARACTERISTICS OF VISUAL TELEPHONE SYSTEMS H.100H.199 INFRASTRUCTURE OF AUDIOVISUAL SERVICES General H.200H.219 Transmiss
3、ion multiplexing and synchronization H.220H.229 Systems aspects H.230H.239 Communication procedures H.240H.259 Coding of moving video H.260H.279 Related systems aspects H.280H.299 Systems and terminal equipment for audiovisual services H.300H.349Directory services architecture for audiovisual and mu
4、ltimedia services H.350H.359 Quality of service architecture for audiovisual and multimedia services H.360H.369 Supplementary services for multimedia H.450H.499 MOBILITY AND COLLABORATION PROCEDURES Overview of Mobility and Collaboration, definitions, protocols and procedures H.500H.509 Mobility for
5、 H-Series multimedia systems and services H.510H.519 Mobile multimedia collaboration applications and services H.520H.529 Security for mobile multimedia systems and services H.530H.539 Security for mobile multimedia collaboration applications and services H.540H.549 Mobility interworking procedures
6、H.550H.559 Mobile multimedia collaboration inter-working procedures H.560H.569 BROADBAND, TRIPLE-PLAY AND ADVANCED MULTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 Advanced multimedia services and applications H.620H.629 Ubiquitous sensor network applications and Internet of Th
7、ings H.640H.649 IPTV MULTIMEDIA SERVICES AND APPLICATIONS FOR IPTV General aspects H.700H.719 IPTV terminal devices H.720H.729 IPTV middleware H.730H.739 IPTV application event handling H.740H.749 IPTV metadata H.750H.759 IPTV multimedia application frameworks H.760H.769 IPTV service discovery up to
8、 consumption H.770H.779 Digital Signage H.780H.789 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T H.323 (2009)/Amd.1 (03/2013) i Recommendation ITU-T H.323 Packet-based multimedia communications systems Amendment 1 Use of Facility message to enable call transfer S
9、ummary Amendment 1 to Recommendation ITU-T H.323 (2009) formalizes the widely implemented call transfer mechanism in ITU-T H.323 that relies upon the FACILITY message with a reason of “callForwarded“. History Edition Recommendation Approval Study Group 1.0 ITU-T H.323 1996-11-11 16 2.0 ITU-T H.323 1
10、998-02-06 16 2.1 ITU-T H.323 Annex D 1998-09-25 16 2.2 ITU-T H.323 Annex E 1999-05-27 16 2.3 ITU-T H.323 Annex F 1999-05-27 16 3.0 ITU-T H.323 1999-09-30 16 3.1 ITU-T H.323 Annex G 2000-02-17 16 4.0 ITU-T H.323 2000-11-17 16 4.1 ITU-T H.323 Annex M3 2001-07-29 16 4.2 ITU-T H.323 Annex Q 2001-07-29 1
11、6 4.3 ITU-T H.323 Annex R 2001-07-29 16 4.4 ITU-T H.323 Annex P 2003-01-13 16 5.0 ITU-T H.323 2003-07-14 16 5.1 ITU-T H.323 (2003) Amd. 1 2005-01-08 16 5.2 ITU-T H.323 (2003) Amd. 2 2005-01-13 16 6.0 ITU-T H.323 2006-06-13 16 7.0 ITU-T H.323 v7 2009-12-14 16 7.1 ITU-T H.323 (2009) Amd. 1 2013-03-16
12、16 ii Rec. ITU-T H.323 (2009)/Amd.1 (03/2013) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permane
13、nt organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishe
14、s the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standard
15、s are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recomme
16、ndation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are
17、 used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Inte
18、llectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had received
19、notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. I
20、TU 2013 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T H.323 (2009)/Amd.1 (03/2013) 1 Recommendation ITU-T H.323 Packet-based multimedia communications systems Amendment 1 Use of Facility message to
21、 enable call transfer 1) Changes to clause 8.1.10 Amend clause 8.1.10 as follows: 8.1.10 Call forwarding and call transfer An endpoint wishing to forwardWhen forwarding an unestablished call or transferring an established call to another endpoint may issuean endpoint may send a Facility message with
22、 FacilityReason callForwarded indicating the address of the new endpoint. The endpoint receiving this Facility indication should send a Release Complete and then restart the Phase A procedures with the new endpoint. Printed in Switzerland Geneva, 2013 SERIES OF ITU-T RECOMMENDATIONS Series A Organiz
23、ation of the work of ITU-T Series D General tariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and mu
24、ltimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cables and other elements of outside plant
25、 Series M Telecommunication management, including TMN and network maintenance Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Terminals and subjective and objective assessment methods Series Q Switching
26、and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks, open system communications and security Series Y Global information infrastructure, Internet protocol aspects and next-generation networks Series Z Languages and general software aspects for telecommunication systems
