ITU-T H.450.7 (05 1999) Message waiting indication……

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1、INTERNATIONALTELECOMMUNICATIONUNIONH.450.7TELECOMMUNICATION(05/99)STANDARDIZATIONSECTOROFITUSERIESH:AUDIOVISUALANDMULTIMEDIASYSTEMSSupplementaryservicesformultimediaMessagewaitingindicationsupplementaryserviceforH.323ITU-TRecommendationH.450.7(PreviouslyCCITTRecommendation)ITU-TH-SERIES

2、RECOMMENDATIONSAUDIOVISUALANDMULTIMEDIASYSTEMSCharacteristicsoftransmissionchannelsusedforotherthantelephonepurposesH.10–H.19Useoftelephone-typecircuitsforvoice-frequencytelegraphyH.20–H.29TelephonecircuitsorcablesusedforvarioustypesoftelegraphtransmissionorH.30–H.39simultaneoustransmis

3、sionTelephone-typecircuitsusedforfacsimiletelegraphyH.40–H.49CharacteristicsofdatasignalsH.50–H.99CHARACTERISTICSOFVISUALTELEPHONESYSTEMSH.100–H.199INFRASTRUCTUREOFAUDIOVISUALSERVICESGeneralH.200–H.219TransmissionmultiplexingandsynchronizationH.220–H.229SystemsaspectsH.230–H.239Communic

4、ationproceduresH.240–H.259CodingofmovingvideoH.260–H.279RelatedsystemsaspectsH.280–H.299SystemsandterminalequipmentforaudiovisualservicesH.300–H.399SupplementaryservicesformultimediaH.450–H.499Forfurtherdetails,pleaserefertoITU-TListofRecommendations.ITU-TRECOMMENDATIONH.450.7MESSAGEWAI

5、TINGINDICATIONSUPPLEMENTARYSERVICEFORH.323SummaryThisRecommendationproposestheproceduresandsignallingprotocolfortheMessageWaitingIndicationsupplementaryservice(SS-MWI)inH.323(PacketBasedMultimediaCommunicationsSystems)networks.SS-MWIisasupplementaryservicethatenablesaServedUserAtobesent

6、aMessageWaitingIndicationandalsoenablesthisMessageWaitingIndicationtobecancelled.TheServedUsermayalsobepermittedtointerrogateaMessageCentreforanyMessageWaitingIndications.TheproceduresandthesignallingprotocolofthisRecommendationarederivedfromtheMessageWaitingIndicationsupplementaryservi

7、ceasspecifiedinISO/IEC15505andISO/IEC15506.ThisRecommendationmakesuseofthe"GenericfunctionalprotocolforthesupportofsupplementaryservicesinH.323"asdefinedinRecommendationH.450.1.SourceITU-TRecommendationH.450.7waspreparedbyITU-TStudyGroup16(1997-2000)andwasapprovedundertheWTSCRe