ITU H.242:2009

ITU H.242:2009 System For Establishing Communication Between Audiovisual Terminals Using Digital Channels Up To 2 Mbit/S Specifies point-to-point procedures involving the BAS codes: initial capability exchange and mode initialization, including restricted-network operation; in-session mode switching, including audiovisu

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Table of Contents

1Scope
2References
3Definitionsandconventions
4Abbreviationsandacronyms
5Terminalcapabilities
6Transmission
7Framestructure
8Basicsequencesforin-channelprocedures
9Modeinitialization,dynamicmodeswitchingand
Mode0forcing
10Recoveryfromfaultconditions
11Networkconsideration:callconnection,disconnectionand
calltransfer
12Procedureforactivationandde-activationofdatachannels
13Proceduresforoperationinrestrictednetworks
14ProcedureforuseofBAS-extensioncodes
15BitoccupancyandthesequencingofBAScodes
16Procedurefordealingwithsingle/multiplechannel
interconnection
17Procedureforuseofencryptioncontrolsignalchannel
18Transmissionofnetworkaddresses
19Informativecodes
AppendixI-Initialization:Caseofvideophoneto
RecommendationITU-TH.320,typeXb
AppendixII-Mode-0forcing:Caseofvideophoneto
RecommendationITU-TH.320,typeXb
AppendixIII-Exampleofuseofmessagestructure
AppendixIV-Examplesofsymmetricalandasymmetrical
transmissionmodes
AppendixV-Examplesrelatingtodatatransmissions
AppendixVI-HierarchicalcapabilityBAScodes
AppendixVII-Interpretationofreceivedaudiocapability
BAScodes
AppendixVIII-Examplesoflegalandillegalcapability
BASsequences
AppendixIX
AppendixX-Analgorithmtodeterminewhetheranincoming
bitstreamwasencodedby[mu]-laworA-lawPCM
Bibliography

Abstract

Specifies point-to-point procedures involving the BAS codes: initial capability exchange and mode initialization, including restricted-network operation; in-session mode switching, including audiovisual mode changes and activation of data channels; other procedures, including single/multiple channel interconnection, encryption, mode-preference indication, conveyance of network addresses and use of BAS extension codes.

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