1、 International Telecommunication Union ITU-T H.246TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (05/2006) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services Communication procedures Interworking of H-series multimedia terminals with H-series multimedia terminals and
2、 voice/voiceband terminals on GSTN, ISDN and PLMN ITU-T Recommendation H.246 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 Transmission multiplexing and synchronizatio
3、n 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.349 Directory services architecture for audiovisual and multimedia services H.350H.359 Quali
4、ty 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 H-Series multimedia systems and s
5、ervices 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 H.550H.559Mobile multimedia collab
6、oration inter-working procedures H.560H.569 BROADBAND AND TRIPLE-PLAY MULTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. H.246 (05/2006) i ITU-T Recommendation H.246 Interworking of H-series multim
7、edia terminals with H-series multimedia terminals and voice/voiceband terminals on GSTN, ISDN and PLMN Summary This Recommendation describes Gateways which provide protocol interworking between H-Series multimedia terminals and other H-Series multimedia terminals, voice/voiceband terminals on GSTN,
8、ISDN or PLMN, V.70 terminals on the GSTN, and multi-call applications on the GSTN. H.246 Gateways provide the required translation of control and media streams to allow interworking between terminals running different protocols. Annex A specifies H.323-H.320 interworking. Annex C specifies the inter
9、working between ISUP (ISDN User Parts of Signalling System No. 7) and H.225.0. Annex E1 specifies the interworking between 2nd Generation Public Land Mobile Networks (PLMN) and H.323. Annex E2 specifies the interworking between 2nd Generation ANSI-41 PLMNs and H.323. Annex F specifies H.323-H.324 in
10、terworking. Note that Annex B and Annex D do not exist; they were planned, but were never approved. Source ITU-T Recommendation H.246 was approved on 29 May 2006 by ITU-T Study Group 16 (2005-2008) under the ITU-T Recommendation A.8 procedure. ii ITU-T Rec. H.246 (05/2006) FOREWORD The International
11、 Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on
12、 them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of I
13、TU-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 standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is u
14、sed for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g. interoperability or applicability) and compliance with the
15、 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 used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of
16、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 Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Pro
17、perty 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 notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, imple
18、mentors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2006 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec.
19、H.246 (05/2006) iii CONTENTS Page 1 Scope 1 2 Normative references 4 3 Definitions 5 4 Abbreviations 5 5 Conventions 6 6 General H-Series interworking definitions. 6 Annex A H.323-H.320 interworking 6 A.1 Summary. 6 A.2 Definitions 6 A.3 Abbreviations . 7 A.4 Overview 7 A.5 Mapping H.323 System Cont
20、rol (H.245) to H.320 System Control (H.242) 7 A.6 Mapping H.323 Call Control (H.225.0) to H.320 Call Control on N-ISDN (Q.931) 19 A.7 Inward and outward calling 20 A.8 Securing encrypted connections between H.320 and H.323 terminals 21 Annex C ISDN User Part function H.225.0 interworking . 22 C.1 Me
21、thodology. 22 C.2 References 23 C.3 Abbreviations . 24 C.4 Conventions 25 C.5 ISUP to H.225.0 mapping 25 C.6 Outgoing call Interworking from H.225.0 to ISUP. 28 C.7 Incoming call Interworking from ISUP to H.225.0. 68 Annex E1 Mobile Application Part and H.225.0 interworking 105 E1.1 Scope 105 E1.2 D
22、efinitions 107 E1.3 Normative references 107 E1.4 Abbreviations . 108 E1.5 H.323 and PLMN Interworking Network Architecture . 109 E1.6 Mapping of ANSI-41 PLMN MAP messages to H.323 messages. 111 E1.7 AnnexE_GK and H323_UIM Terminal messages. 112 E1.8 Message syntax of Mobile parameters in H.225.0 me
23、ssages to support H.323 mobility 112 iv ITU-T Rec. H.246 (05/2006) Page Annex E2 ANSI-41 (Americas) Mobile Application Part and H.225.0 interworking 113 E2.1 Scope 113 E2.2 Definitions 113 E2.3 Normative references 114 E2.4 Abbreviations . 114 E2.5 H.323 and PLMN interworking network architecture 11
24、7 E2.6 H323_UIM Terminal contains an ANSI-41 User Identification Module 118 E2.7 H323_UIM management procedures . 125 E2.8 AnnexE2_GK with PLMN Interworking Function (IWF) and H.323 Gatekeeper 132 E2.9 Mobility Management and Communication Management AnnexE2_GK procedures. 135 E2.10 Automatic regist
25、ration and authentication 136 E2.11 UIM-based roaming 136 E2.12 Stage 2 descriptions of ANSI-41 PLMN Interworking and H323_UIM Terminal features 142 E2.13 Automatic call delivery 151 E2.14 Successful Mobile Terminating ANSI-136 Short Message Service (CMT) mapped to H.323 Annex K Service Control mess
26、age 154 E2.15 Message Waiting Notification 156 Annex F H.323-H.324 interworking. 159 F.1 Scope 159 F.2 Definitions 159 F.3 Abbreviations . 159 F.4 Overview 159 F.5 Mapping H.245 control 160 F.6 Mapping call control information. 162 F.7 Communication procedure . 163 F.8 Handling of fast connect. 164
27、F.9 Handling of H.245 tunnelling. 167 F.10 Security. 167 F.11 Mapping media channels 167 ITU-T Rec. H.246 (05/2006) 1 ITU-T Recommendation H.246 Interworking of H-series multimedia terminals with H-series multimedia terminals and voice/voiceband terminals on GSTN, ISDN and PLMN 1 Scope This Recommen
28、dation describes Gateways which provide protocol interworking between H-Series multimedia terminals and other H-Series multimedia terminals, voice/voiceband terminals on GSTN or ISDN, V.70 terminals on the GSTN, and multi-call applications on the GSTN. H.246 Gateways provide the required translation
29、 of control and media streams to allow interworking between terminals running different protocols. The interworking of the H-Series protocols H.323, H.320, H.324, H.324 Mobile, and H.310 with the network acting transparently are covered in this Recommendation as shown in Figures 1 to 3. The interwor
30、king of H-Series protocols with voice/voiceband GSTN or ISDN terminals is covered in this Recommendation and involves the interconnection of regular telephone equipment with H-Series protocols in both the call originate and call answer applications. This includes interaction with IP-based telephony
31、which is H.323-based. The interworking of H-Series protocols and multi-call applications on the GSTN is covered in this Recommendation and involves an H-Series protocol interacting with several calls simultaneously on a single GSTN line. This Recommendation specifies interworking requirements with r
32、espect to call control, system control, and media flow between multimedia and voice/voiceband terminals. The body of this Recommendation provides a general overview of the Recommendation and specifies any mappings which are applicable to more than one interworking scenario. Specifications of specifi
33、c interworking scenarios such as H.323 to H.320 are covered in individual Annexes. The H-Series interworking scenarios which are planned to be part of this Recommendation are summarized in Table 1. Additional interworking scenarios are described in Table 2. Table 1/H.246 Annex name of H-Series inter
34、working H.320a)H.324 H.310b)H.324 Mobile H.323 A TBA TBA TBA H.320a)NA TBA TBA TBA H.324 NA NA TBA TBA H.310b)NA NA NA TBA NA Not Applicable TBA Annex designator To Be Assigned a) H.321 and H.322 will be covered in the H.320 Annexes. b) H.310 RAST-1 and RAST-5 terminals will be covered in the H.310
35、Annexes. 2 ITU-T Rec. H.246 (05/2006) Table 2/H.246 Annex name of H-Series interworking with Voice/Voiceband terminals on GSTN and ISDN Voice/Voiceband terminal on GSTN Voice/Voiceband only terminal on ISDN H.323 B TBA H.320a)TBA TBA H.324 TBA TBA H.310b)TBA TBA H.324 Mobile TBA TBA TBA Annex design
36、ator To Be Assigneda) H.321 and H.322 will be covered in the H.320 Annexes. b) H.310 RAST-1 and RAST-5 terminals will be covered in the H.310 Annexes. Figures 1 through 3 show the H-Series call control, system control, and media flow interworking which is specified in this Recommendation. Voice/Voic
37、eband terminals on GSTN use the appropriate national standards for call control and G.711 or analogue signals for voice. Voice/Voiceband terminals on ISDN use the appropriate national variant of Q.931 for call control and G.711 for voice. Interworking of H.323 over ATM with H.323 over non-ATM IP net
38、works is possible through the use of an H.323-H.323 gateway. Transport of H.323 media streams over ATM is described in AF SAA-0124.000. Figure 1/H.246 H-Series call control interoperability ITU-T Rec. H.246 (05/2006) 3 Figure 2/H.246 H-Series system control interoperability Figure 3/H.246 H-Series m
39、edia interoperability 4 ITU-T Rec. H.246 (05/2006) 2 Normative references The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. Al
40、l Recommendations and other references are subject to revision; all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations i
41、s regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T Recommendation E.164 (2005), The international public telecommunication numbering plan. CCITT Recommendation G.711 (1988), Pulse Code Modul
42、ation (PCM) of voice frequencies. CCITT Recommendation G.722 (1988), 7 kHz audio-coding within 64 kbit/s. ITU-T Recommendation G.723.1 (2006), Dual rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s. CCITT Recommendation G.728 (1992), Coding of speech at 16 kbit/s usi
43、ng low-delay code excited linear prediction. ITU-T Recommendation G.729 (1996), Coding of speech at 8 kbit/s using Conjugate Structure Algebraic-Code Excited Linear-Prediction (CS-ACELP). ITU-T Recommendation H.221 (2004), Frame structure for a 64 to 1920 kbit/s channel in audiovisual teleservices.
44、ITU-T Recommendation H.225.0 (2006), Call signalling protocols and media stream packetization for packet-based multimedia communication systems. ITU-T Recommendation H.230 (2004), Frame-synchronous control and indication signals for audiovisual systems. ITU-T Recommendation H.242 (2004), System for
45、establishing communication between audiovisual terminals using digital channels up to 2 Mbit/s. ITU-T Recommendation H.243 (2005), Procedures for establishing communication between three or more audiovisual terminals using digital channels up to 1920 kbit/s. ITU-T Recommendation H.245 (2006), Contro
46、l protocol for multimedia communication. ITU-T Recommendation H.261 (1993), Video codec for audiovisual services at p 64 kbit/s. ITU-T Recommendation H.262 (2000) | ISO/IEC 13818-2:2000, Information technology Generic coding of moving pictures and associated audio information: video. ITU-T Recommend
47、ation H.263 (2005), Video coding for low bit rate communication. ITU-T Recommendation H.310 (1998), Broadband audiovisual communication systems and terminals. ITU-T Recommendation H.320 (2004), Narrow-band visual telephone systems and terminal equipment. ITU-T Recommendation H.321 (1998), Adaptation
48、 of H.320 visual telephone terminals to B-ISDN environments. ITU-T Recommendation H.322 (1996), Visual telephone systems and terminal equipment for local area networks which provide a guaranteed quality of service. ITU-T Rec. H.246 (05/2006) 5 ITU-T Recommendation H.323 (2006), Packet-based multimed
49、ia communications systems. ITU-T Recommendation H.324 (2005), Terminal for low bit-rate multimedia communication. ITU-T Recommendation Q.931 (1998), ISDN user-network interface layer 3 specification for basic call control. ITU-T Recommendation Q.932 (1998), Digital Subscriber Signalling System No. 1 Generic procedures for the control of ISDN supplementary services. ITU-T Recommendation Q.950 (2000), Supplementary services protocols, structure and general principles. ITU-T Recommendation T.
