1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T H.460.10TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2004) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services Supplementary services for multimedia Call party category within H.323 systems ITU-T Recommendation H.460.
2、10 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 synchronization H.220H.229 Systems aspects H.230H.239 Communication procedures H.240H.25
3、9 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 Quality of service architecture for audiovisual and multimedia services H.360H.
4、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 services H.510H.519 Mobile multimedia collaboration applications and servic
5、es 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.559 Mobile multimedia collaboration inter-working procedures H.560H.569 BROADBAND AND TRIPLE-PLAY MUL
6、TIMEDIA 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.460.10 (03/2004) i ITU-T Recommendation H.460.10 Call party category within H.323 systems Summary This Recommendation specifies a mechanism that al
7、lows calling H.323 endpoints to signal calling party category information in the forward direction, and allows called H.323 endpoints to signal called party category information in the backward direction. Source ITU-T Recommendation H.460.10 was approved on 15 March 2004 by ITU-T Study Group 16 (200
8、1-2004) under the ITU-T Recommendation A.8 procedure. ii ITU-T Rec. H.460.10 (03/2004) FOREWORD The International 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 o
9、f 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, establishes the topi
10、cs 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 standards are prep
11、ared 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 Recommendation ma
12、y 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 used to exp
13、ress 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 Intellectual Pro
14、perty 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 not received notice o
15、f intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2004 All rights reserved. No part of
16、this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. H.460.10 (03/2004) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Call party category 2 4 Call party category info parameter . 2 4.1 Call party category info ASN.1 definition . 3 4.2 D
17、escription of ASN.1 types and fields. 3 ITU-T Rec. H.460.10 (03/2004) 1 ITU-T Recommendation H.460.10 Call party category within H.323 systems 1 Scope A calling partys category (CPC) parameter is defined by ISUP that describes the nature of the calling party, e.g., operator language, test call, payp
18、hone, etc. In addition, a called party category indicator is included in the ISUP backward call indicators parameter. ISUP variants used in some regional networks (in North America) define an originating line information (OLI) parameter to carry this information instead of the CPC parameter. R2 sign
19、alling uses the Group II forward signals to carry similar information. ITU-T Rec. H.450.12 defines a partyCategory field that identifies the category of either the calling party or the called party involved in the call. This information would be very useful for making routing and accounting decision
20、s within the H.323 network. A mechanism is, therefore, required to support the signalling of the calling party category in H.323 networks. A calling endpoint should be able to signal calling party category information in the forward direction. The calling party category parameter may be included in
21、Setup, ARQ and LRQ messages. H.323 devices, gateways, gatekeepers and border elements may apply routing and accounting policies based on the value of the calling party category. A called endpoint should be able to signal called party category information in the backward direction. The called party c
22、ategory parameter may be included in progress, alerting or connect messages. H.323 devices, gateways, gatekeepers and border elements may apply routing and accounting policies based on the value of the called party category. This Recommendation specifies a mechanism that allows calling H.323 endpoin
23、ts to signal calling party category information in the forward direction and allows called H.323 endpoints to signal called party category information in the backward direction. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this
24、text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent editio
25、n of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is 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 H.225.0 (20
26、03), Call signalling protocols and media stream packetization for packet-based multimedia communication systems. ITU-T Recommendation H.323 (2003), Packet-based multimedia communications systems. ITU-T Recommendation Q.763 (1999), Signalling System No. 7 ISDN user part formats and codes plus Amendme
27、nt 2 (2002), Support for the International Emergency Preference Scheme. ITU-T Recommendation H.460.4 (2002), Call priority designation for H.323 calls. ANSI T1.113-20001, Signalling System No. 7 (SS7) Integrated Services Digital Network (ISDN) User Part. _ 1T1 standards are maintained since November
28、 2003 by ATIS. 2 ITU-T Rec. H.460.10 (03/2004) 3 Call party category The call party category parameter is used to transport calling party category information in messages sent by the calling H.323 endpoint in the forward direction, and to transport called party category information in messages sent
29、by the called H.323 endpoint in the backward direction. If the calling party category has the value of the International Emergency Preference Scheme (IEPS), then the use of H.460.4 procedures is not precluded. A H.323 endpoint or gatekeeper may include the call party category parameter in H.225.0 RA
30、S and call signalling (Q.931) messages using the generic extensibility framework. When sending the call party category parameter in the call signalling messages, it shall be coded in the genericData parameter in the H.225.0 H323-UU-PDU in the user-user information element. When sending the call part
31、y category parameter in the RAS messages, it shall be coded in the genericData parameter in the request parameter of the H.225.0 RAS Message. The GenericData parameter indicates the callPartyCategory feature and contains a callPartyCategory parameter. Table 1 defines the call party category feature.
32、 Table 1/H.460.10 Call party category feature Feature name: Call party category Feature Description: This feature allows a H.323 endpoint to include calling party category or called party category information in a signalling message. Feature identifier type: Standard Feature identifier value: 10 4 C
33、all party category info parameter Table 2 defines the call party category info parameter. Table 2/H.460.10 Call party category info parameter Parameter name: Call party category info Parameter description: The call party category information parameter is the data sent in H.225.0 RAS and call signall
34、ing messages. The content is a raw field consisting of the ASN.1 PER encoded CallPartyCategoryInfo as specified in the ASN.1 in 4.1. Parameter identifier type: Standard Parameter identifier value: 1 Parameter type: Raw Parameter cardinality: Once and only once ITU-T Rec. H.460.10 (03/2004) 3 4.1 Cal
35、l party category info ASN.1 definition The call party category info definition used within the GenericData is shown below. CALL-PARTY-CATEGORY DEFINITIONS AUTOMATIC TAGS := BEGIN CallPartyCategoryInfo := SEQUENCE callPartyCategory CallPartyCategory OPTIONAL, originatingLineInfo OriginatingLineInfo O
36、PTIONAL, . CallPartyCategory := INTEGER (0255) OriginatingLineInfo := INTEGER (0255) END 4.2 Description of ASN.1 types and fields CallPartyCategoryInfo The H.323 endpoint may include this field to signal the calling or called party category or originating line information parameters in call signall
37、ing or RAS messages. CallPartyCategory The H.323 endpoint may include this field to signal the calling or called party category information in call signalling or RAS messages. The contents are values that are defined in ITU-T Rec. Q.763 (1999) and its Amendment 2 (2002). OriginatingLineInfo The call
38、ing H.323 endpoint may include this field to signal the originating line information parameter in call signalling or RAS messages. The contents are values that are defined in ANSI T1.113.3-2000, Annex C. Printed in Switzerland Geneva, 2004 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the
39、 work of ITU-T Series B Means of expression: definitions, symbols, classification Series C General telecommunication statistics Series D General tariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication servi
40、ces Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia 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 interfer
41、ence Series L Construction, installation and protection of cables and other elements of outside plant Series M TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Series N Maintenance: international sound programme and televi
42、sion transmission circuits Series O Specifications of measuring equipment Series P Telephone transmission quality, telephone installations, local line networks Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for tele
43、matic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks and open system communications Series Y Global information infrastructure, Internet protocol aspects and Next Generation Networks Series Z Languages and general software aspects for telecommunication systems
