1、INTERNATIONAL TELECOMMUNICATION UNIONITU-TH.248TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITUAnnex K(11/2000)SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMSInfrastructure of audiovisual services CommunicationproceduresGeneric announcement package (determined text)Annex KCAUTION !PREPUBLISHED RECOMMENDAT
2、IONThis prepublication is an unedited version of a recently approved Recommendation.It will be replaced by the published version after editing. Therefore, there will bedifferences between this prepublication and the published version.FOREWORDThe International Telecommunication Union (ITU) is the Uni
3、ted Nations specialized agency in the field oftelecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ ofITU. ITU-T is responsible for studying technical, operating and tariff questions and issuingRecommendations on them with a view to standardizing telecommu
4、nications 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 onthese topics.The approval of ITU-T Recommendations is covered by the procedure
5、 laid down in WTSA Resolution 1.In some areas of information technology which fall within ITU-Ts purview, the necessary standards areprepared on a collaborative basis with ISO and IEC.NOTEIn this Recommendation, the expression “Administration“ is used for conciseness to indicate both atelecommunicat
6、ion administration and a recognized operating agency.INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommendation mayinvolve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence,validity or ap
7、plicability of claimed Intellectual Property Rights, whether asserted by ITU members or othersoutside of the Recommendation development process.As of the date of approval of this Recommendation, ITU had/had not received notice of intellectualproperty, protected by patents, which may be required to i
8、mplement this Recommendation. However,implementors are cautioned that this may not represent the latest information and are therefore stronglyurged to consult the TSB patent database. ITU 2001All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means,e
9、lectronic or mechanical, including photocopying and microfilm, without permission in writing from ITU.ITU-T H.248/Annex K (11/2000) Prepublished version 1TITLE: H.248 Annex K: Generic Announcement package (determined text).SummaryH.248 Annex K defines a generic announcement package for use with the
10、H.248 Gateway ControlProtocol. The generic announcement package provides a media gateway controller with the abilityto control announcements in a media gateway. Control is provided by the definition ofannouncement events (for example, “announcement completed“) and announcement signals (forexample, “
11、play a specified announcement“). As defined in H.248, a “package“ is an extension toH.248 that supports specific behavior.Attention: This is not an ITU publication made available to the public, but an internal ITU Document intended only for use by theMember States of the ITU and by its Sector Member
12、s and their respective staff and collaborators in their ITU related work. It shall notbe made available to, and used by, any other persons or entities without the prior written consent of the ITU.ITU-T H.248/Annex K (11/2000) Prepublished version 2Generic Announcement PACKAGEPackageID: an, 0x001dVer
13、sion: 1Extends: NoneThat package supports announcement functionality at a Media Gateway. This announcementcould be realised by the Media Gateway as different sorts of messaging. For example: it could bean audio announcement, a text message or a composition of text messages.K.1 PropertiesNoneK.2 Even
14、tsNoneK.3 SignalsK.3.1 Fixed - Announcement playSignalID: apf (0x0001)Description: Initiates the play of a fixed announcement.description:SignalType: OO, TO (default)SignalDuration: Provisioned.NotifyCompletion: Provisioned (default false)Parameters:Announcement nameParameterID: an (0x0001)Type: enu
15、meration of announcements.Number of cyclesParameterID: noc (0x0002)Type: integer.Values: any0 is used to represent an announcementthat continuously plays or loops. (OO)Default: provisioned per announcement in the MG.Announcement VariantParameterID: av (0x0003)type: string.ITU-T H.248/Annex K (11/200
16、0) Prepublished version 3Indicates a specific announcement variant for instance voicetype or language.Announcement DirectionParameterID: di (0x0004)Type: enumValues: External ext (0x01),Internal int(0x02),Both both(0x03)Default: extK.3.2 Variable - Announcement playSignalID: apv (0x0002)Description:
17、 Initiates the play of a variable announcementdescription:SignalType: OO, TO (default)SignalDuration: Provisioned.NotifyCompletion: Provisioned (default false)Parameters:Announcement nameParameterID: an (0x0001)Type: enumeration of announcements.Parameter Number of Cycles - Values: any0 is used to r
18、epresent an announcementthat continuously plays or loops. (OO)Default: provisioned per announcement in the MG.Announcement VariantParameterID: av (0x0003)type: string.Indicates a specific announcement variant for instance voice type orlanguage.Announcement DirectionParameterID: di (0x0007)Type: enum
19、Values: External ext (0x01),Internal int (0x02),Both both (0x03)Default: extNumber of cyclesParameterID: noc (0x0002)Type: integer.Values: anyITU-T H.248/Annex K (11/2000) Prepublished version 4Default: 1NumberParameterID: num (0x0004)Type: integerValues: anySpecific parameters interpretationParamet
20、erID: spi (0x0005)Type: enumerationValues: anySpecific parametersParameterID: sp (0x0006)Type: stringValues: anyDefault is provisioned for every announcement.StatisticsNoneK.5 ProceduresFor each announcement a default duration and number of cycles is defined in the MG. AnMG receiving such a signal p
21、lays the indicated announcement (indicated by the nameparameter) for the duration specified by the noc parameter or the signal duration. Theone that expires first will stop the announcement. If noc parameter and/or duration is notincluded, the MG uses the corresponding announcements defaults.If the
22、signal duration is 0, the signal is played specified by the noc parameter only or whennot included in the signal by the announcements number of cycle default.To provide additional information when an announcement is to be played, the MGC sendsa play variable announcement signal to the MG. H.248 does
23、nt guarantee in sequenceprocessing of transactions. To ensure sequential playing of an announcement, atransaction reply for a command that affects the announcement signal should be receivedby the Media Gateway Controller before it sends the additional variable announcementdata. An MG receiving such
24、a signal plays the indicated announcement (indicated by thename 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 durationare not included, the MG uses the corresponding announcement defaul
25、ts.If the signal duration is 0, the signal is played specified by the noc parameter only or whennot included in the signal by the announcements number of cycle default.If the “Specific parameters” parameter is included, the MG uses the “Specific parametersinterpretation” parameter to identify and in
26、terpret the particular type of information to beincluded in relation to the announcement. Examples of the types of Specific parametersinclude a telephone number, date, or time.ITU-T H.248/Annex K (11/2000) Prepublished version 5The direction parameter can be used to indicate the direction that the announcement is tobe sent. External (default) indicates that the announcement is sent from the MG to anexternal point. Internal indicates that the announcement is played into the MG to the otherterminations. Both indicates internal and external behaviour.
