1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T H.248.7TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2004) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services Communication procedures Gateway control protocol: Generic Announcement package ITU-T Recommendation H.248.
2、7 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.259
3、 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.3
4、69 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 service
5、s 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 collaboration inter-working procedures H.560H.569 BROADBAND AND TRIPLE-PLAY MULTI
6、MEDIA 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.248.7 (03/2004) i ITU-T Recommendation H.248.7 Gateway control protocol: Generic Announcement package Summary This Recommendation defines a generic a
7、nnouncement package for use with the H.248.1 Gateway Control Protocol. The generic announcement package provides a media gateway controller with the ability to control announcements in a media gateway. Control is provided by the definition of announcement events (for example, “announcement completed
8、“) and announcement signals (for example, “play a specified announcement“). As defined in ITU-T Rec. H.248.1, a “package“ is an extension to H.248.1 that supports specific behaviour. The changes introduced by this new edition are: removal of superfluous information; announcement playing clarificatio
9、n; correction of announcement package editorial error. NOTE This Recommendation has been renumbered. It was previously known as ITU-T Rec. H.248, Annex K. Source ITU-T Recommendation H.248.7 was approved on 15 March 2004 by ITU-T Study Group 16 (2001-2004) under the ITU-T Recommendation A.8 procedur
10、e. NOTE This text was approved as Corrigendum 1 to ITU-T Rec. H.248.7 (2000), but due to the number of modifications, it was decided to publish it as a new edition. ii ITU-T Rec. H.248.7 (03/2004) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in th
11、e 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 them with a view to standardizing telecommunications on a worldwide basis. T
12、he 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 ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution
13、 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 used for conciseness to indicate both a telecommunication administration and a
14、 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 Recommendation is achieved when all of these mandatory provisions are met. T
15、he 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 any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibilit
16、y 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 Property Rights, whether asserted by ITU members or others outside of the Recomm
17、endation development process. As of the date of approval of this Recommendation, ITU had not received notice of 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
18、and are therefore strongly urged to consult the TSB patent database. ITU 2004 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. H.248.7 (03/2004) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Abbreviat
19、ions 1 4 Generic announcement package . 1 4.1 Properties 1 4.2 Events . 1 4.3 Signals 2 4.4 Statistics 3 4.5 Procedures 3 ITU-T Rec. H.248.7 (03/2004) 1 ITU-T Recommendation H.248.7 Gateway control protocol: Generic Announcement package 1 Scope This Recommendation defines a package that extends the
20、applicability of the H.248.1 Gateway Control Protocol Recommendation. Specifically, this Recommendation defines a generic announcement package for use with the H.248.1 Gateway Control Protocol. The generic announcement package provides a media gateway controller with the ability to control announcem
21、ents in a media gateway. Control is provided by the definition of announcement events (for example, “announcement completed“) and announcement signals (for example, “play a specified announcement“). As defined in ITU-T Rec. H.248.1, a “package“ is an extension to H.248.1 that supports specific behav
22、iour. 2 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. All Recommendations and other references are subject to r
23、evision; 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 is regularly published. The reference to a document within t
24、his Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T Recommendation H.248.1 (2002), Gateway control protocol: Version 2. 3 Abbreviations This Recommendation uses the following abbreviations: OO On/Off (Signal type defined in ITU-T Rec. H.248.1) TO Tim
25、eout (Signal type defined in ITU-T Rec. H.248.1) 4 Generic announcement package PackageID: an, 0x001d Version: 1 Extends: None That package supports announcement functionality at a Media Gateway. This announcement could be realized by the Media Gateway as different sorts of messaging. For example: i
26、t could be an audio announcement, a text message or a composition of text messages. 4.1 Properties None. 4.2 Events None. 2 ITU-T Rec. H.248.7 (03/2004) 4.3 Signals 4.3.1 Fixed: Announcement play SignalID: apf (0x0001) Description: Initiates the play of a fixed announcement description: SignalType:
27、TO (default) SignalDuration: Provisioned Parameters: Announcement name ParameterID: an (0x0001) Type: enumeration of announcements Number of cycles ParameterID: noc (0x0002) Type: integer Values: any 0 is used to represent an announcement that continuously plays or loops (OO). Default: provisioned p
28、er announcement in the MG Announcement Variant ParameterID: av (0x0003) Type: string Indicates a specific announcement variant for instance voice type or language. Announcement Direction ParameterID: di (0x0004) Type: enum Values: External ext (0x01), Internal int (0x02), Both both (0x03) Default: e
29、xt 4.3.2 Variable: Announcement play SignalID: apv (0x0002) Description: Initiates the play of a variable announcement description: SignalType: TO (default) SignalDuration: Provisioned Parameters: Announcement name ParameterID: an (0x0001) Type: enumeration of announcements Default: provisioned per
30、announcement in the MG ITU-T Rec. H.248.7 (03/2004) 3 Number of cycles ParameterID: noc (0x0002) Type: integer Values: any, 0 is used to represent an announcement that continuously plays or loops (OO). Default: 1 Announcement Variant ParameterID: av (0x0003) Type: string Indicates a specific announc
31、ement variant for instance voice type or language. Number ParameterID: num (0x0004) Type: integer Values: any Specific parameters interpretation ParameterID: spi (0x0005) Type: enumeration Values: any Specific parameters ParameterID: sp (0x0006) Type: string Values: any Default is provisioned for ev
32、ery announcement. Announcement Direction ParameterID: di (0x0007) Type: enum Values: External ext (0x01), Internal int (0x02), Both both (0x03) Default: ext 4.4 Statistics None. 4.5 Procedures For each announcement, a default duration and number of cycles is defined in the MG. An MG receiving such a
33、 signal plays the indicated announcement (indicated by the name parameter) for the duration specified by the noc parameter or the signal duration. The one that expires first will stop the announcement. If noc parameter and/or duration is not included, the MG uses the corresponding announcements defa
34、ults. 4 ITU-T Rec. H.248.7 (03/2004) If the signal duration is 0, the announcement l is played for the time specified by the noc parameter, or when the noc parameter is not included in the signal, the announcement is played by its cycle default value. If the parameter noc is 0, the signal is played
35、for the time specified by the signal duration, or when the duration is not included in the signal, the announcement is played by its duration default value. To provide additional information when an announcement is to be played, the MGC sends a play variable announcement signal to the MG. ITU-T Rec.
36、 H.248.1 does not guarantee in-sequence processing of transactions. To ensure sequential playing of an announcement, a transaction reply for a command that affects the announcement signal should be received by the Media Gateway Controller before it sends the additional variable announcement data. If
37、 the Media Gateway receives a signal with the keep active flag with additional variable announcement data for an already playing announcement, it shall continue playing the announcement according to the additional data. An MG receiving such a signal plays the indicated announcement (indicated by the
38、 name parameter) for the duration specified by the noc parameter or the signal duration. The one that expires first will stop the announcement. If noc parameter and/or duration is not included, the MG uses the corresponding announcement defaults. If the signal duration is 0, the announcement l is pl
39、ayed for the time specified by the noc parameter, or when the noc parameter is not included in the signal, the announcement is played by its cycle default value. If the parameter noc is 0, the signal is played for the time specified by the signal duration, or when the duration is not included in the
40、 signal, the announcement is played by its duration default value. Table 1 shows the possible combinations of Signal type, Duration, Number of Cycles and the resultant effect. Table 1/H.248.7 Announcement playing result Signal type Signal duration Number of cycles (iterations) Result Brief Not inclu
41、ded Not included Plays the message a number of times up to default duration or a default number of times whichever one is shorter. The message may be stopped part way through a signal. 0 Plays the message n times up to the default duration. 1 Plays the message once or for the default duration whiche
42、ver one is shorter. The message may be stopped part way through a signal. n times Plays the message a number of times up to default duration or n number of times whichever one is shorter. The message may be stopped part way through a signal. 0 Not included Plays the message n times according to the
43、default Number of Cycles. 0 Plays multiple iterations (endless play) n times Plays the message n times Duration per-announcement Duration Not included Plays the message a number of times for the specified duration or a default number of times whichever one is shorter. The message may be stopped part
44、 way through a signal. ITU-T Rec. H.248.7 (03/2004) 5 Table 1/H.248.7 Announcement playing result Signal type Signal duration Number of cycles (iterations) Result Brief Duration per-announcement Duration 0 Plays the message a number of times up to the specified duration. The message may be stopped p
45、art way through a signal. 1 Plays the message once n times Plays the message n times up to the specified duration. The message may be stopped part way through a signal. Duration per-announcement Duration Not included, 0, 1 or n times Plays the message for the specified duration, message stops before
46、 being fully played. Timeout Not included Not included Plays the message a number of times for the default duration or a default number of times whichever one is shorter. 0 Plays the message n times up to the default duration. 1 Plays the message once up to the default duration n times Plays the mes
47、sage n times up to the default duration. 0 Not included Plays the message n times according to the default Number of Cycles. 0 Plays multiple iterations (endless play) n times Plays the message n times Duration per-announcement Duration Not included Plays the message a number of times for the specif
48、ied duration or a default number of times whichever one is shorter. The message may be stopped part way through a signal. 0 Plays multiple iterations until the specified duration 1 Plays the message once, as one iteration is shorter than duration n times Plays the message a number of times for the s
49、pecified duration or the specified number of times whichever one is shorter. The message may be stopped part way through a signal. Duration per-announcement Duration Not included, 0, 1, n times Plays for the specified duration, message stops before the message fully plays. On/Off Ignored Not included or 0 Plays multiple iterations (endless play) Once Plays multiple iterations (endless play) n times Plays multiple iterations (endless play) NOTE This table is only applicable to this Recommendation. The behaviour of signal playing
