INTERNATIONAL TELECOMMUNICATION UNION
`
`UP)
`
`
`
`TELECOMMUNICATION
`STANDARDIZATION SECTOR
`OF ITU
`
`
` H.323
`(41/2000)
`
`SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS
`
`Infrastructure of audiovisual services — Systems and
`terminal equipment for audiovisual services
`
`Packet-based multimedia communications
`systems
`
`ITU-T Recommendation H.323
`
`(Formerly CCITT Recommendation)
`
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`ITU-T H-SERTIES RECOMMENDATIONS
`
`AUDIOVISUAL AND MULTIMEDIA SYSTEMS
`
`CHARACTERISTICS OF VISUAL TELEPHONE SYSTEMS
`INFRASTRUCTURE OF AUDIOVISUAL SERVICES
`General
`
`H.200-H.219
`H1.220-H1.229
`H.230--H.239
`H.240-H.259
`H.260-H.279
`H.280-H299
`
`
` H.100-E0. 199
`
`Transmission rouliplexing and syncbronization
`Systems aspects
`Communication procedures
`Coding of moving video
`Related systems aspects
`
`OR MULTIMEDIA
`
`H.450-H.499
`
`
`For further details, please refer to the list of17U-TRecammendations
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`ITU-T Recommendation H.333
`
`Packet-based multimedia communications systems
`
`Summary
`
`that provide multimedia
`entities
`other
`and
`terminals
`describes
`This Recommendation
`communications services over Packet Based Networks (PBN) which may not provide a guaranteed
`Quality of Service. H.323 entities may provide real-time audio, video and/or data comnuunications.
`Support for audio is mandatory, while data and video are optional, but if supported, the ability to use
`a specified common mode of operation is required, so that all terminals supporting that media type
`can interwork,
`
`The packet based network over which H.323 entities communicate may be a point-to-point
`connection, a single network segment, or an internetwork having multiple segments with cornplex
`topologies.
`
`H.323 entities may be used in point-to-point, rmultipoint, or broadcast (as described in ITU-T
`Ree. H.332) configurations. They may interwork with H.310 terminals on B-ISDN, H.320 terminals
`on N-ISDN, H.321 terminals on B-ISDN, H.322 terminals on Guaranteed Quality of Service LANs,
`H.324 terminals on GSTN and wireless networks, V.70 terminals on GSTN, and voice terminals on
`GSTN or ISDN throughthe use of Gateways.
`
`H.323 entities may be integrated into personal computers or implemented in stand-alone devices
`such as videotelephones.
`
`Note that the title of H.323 (1996) was "Visual telephone systems and equipment for local area
`networks which provide a non-guaranteed quality of service”. The title changed in Version 2 to be
`consistent with its expanded scope.
`
`Products claiming compliance with Version 1 of H.323 shall comply with all of the mandatory
`requirements of H.323 (1996) which references ITU-T Rec. H.225.0 (1996) and H.245 (1997).
`Version | products shall be identified by H.225.0 messages containing a protocelidentifier = {itu-t
`(O}
`recommendation (0) h (8) 2250 version (0)
`1}
`and H.245 messages containing a
`protocolidentifier = {itu-t (0) recommendation (0) h (8} 245 version (0) 2}.
`
`Products claiming compliance with Version 2 of H.323 shall comply with all of the mandatory
`requirements of this Recommendation, H.323 (1998), which references ITU-T Rec. H.225.0 (1998)
`and H.245 (1998 orlater). Version 2 products shall be identified by H.225.0 messages containing a
`protecolldentifier = {itu-t (0) recommendation (0) h (8) 2250 version (0) 2} and H.245 messages
`containing a pretocelidentifier = fitu-t (G) recommendation (G) h (8) 245 version (0) x}, where "x"
`is 3 or higher.
`
`Products claiming compliance with Version 3 of H.323 shall comply with all of the mandatory
`requirements of this Recommendation, H.323 (1999), which references ITU-T Ree. H.225.0 (1999)
`and H.245 (1999or later). Version 3 products shall be identified by H.225.0 messages containing a
`protocolidentifier = {itu-t (0) recommendation (0) h (8) 2250 version (0) 3} and H.245 messages
`containing a pretocolidentifier = {itu-t (6) recommendation (0) h (%) 245 version (0} x}, where "x"
`is 5 or higher.
`
`ITU-TRec. H.323 (11/2000)
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`Products claiming compliance with Version 4 of H.323 shall comply with all of the mandatory
`requirements of this Recommendation, H.323 (2000), which references TPU-T Ree. H.225.0 (2000)
`and H.245 (2000 or later). Version 4 products shall be identified by H.225.0 messages containing a
`protocolidentifier = {itu-t (0) recommendation (0) h (8) 2250 version (G) 4} and H.245 messages
`containing a pretecolidentifier = {itu-t (0) recommendation (0) h (8) 245 version (0) x}, where "x"
`is 7 or higher.
`
`Source
`
`ITU-T Recommendation H.323 was prepared by ITU-T Study Group 16 (2001-2004) and approved
`under the WTSAResolution | procedure on 17 November 2000, and on 1 March 2001 for Annex L.
`
`ii
`
`ITU-TRec. 1.323 (11/2008)
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`
`
`FOREWORD
`
`The International Telecommunication Union @TU})is the United Nations specialized agency in the field of
`telecommunications, The ITU Telecommnunication Standardization Sector (TU-T) is a permanent organ of
`ITU, ITU-Tis 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 topics for study by the ITU-Tstudy groups which, tn turn, produce Recommendations on these
`topics.
`
`The approval of ITU-T Recommendations is covered by the procedure laid down in WTSAResolution 1.
`
`In some areas of information technology which fall within ITU-T’s purview,
`preparedon a collaborative basis with TSO andIEC.
`
`the necessary standards are
`
`
`
`the expression "Administration" is used for conciseness to indicate both a
`In this Recommendation,
`telecommunication administration and a recognized operaling agency.
`
`NOTE
`
`INTELLECTUAL PROPERTY RIGHTS
`
`ITUdraws attention to the possibility that the practice or implementation of this Recommendation may
`involve the use of a claimed Intellectual Property Right. TFU takes no position concerning the evidence,
`validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU! members or others
`ouside of the Recommendation development process.
`
`As of the date of approval of this Recommendation, ITU had received notice of mieHectual property,
`protected by patents, which maybe required to implement this Recommendation. However, tmplermentors are
`cautioned that this may not represent the latest information and are therefore strongly urged to consult the
`TSB patent database.
`
`All rights reserved. No part of this publication may be reproduced or utdized in any form or by any means,
`electronic or mechanical, inchiding photocopying and microfilm, without permission in wnting from ITU.
`
`© ITU 2002
`
`ITU-TRec. H.323 (11/2000)
`
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`CONTENTS
`
`SCOPC .ccccesccesssesesesesenacesssarecsesseaaeecsesecesecenseusessascseasenseeesernescaeeneseeessaueseseteascseeesseseses
`
`Normative references oo... cccscscsccececctssnssesensesscesssevsuseassesarseeseseeceecervsvssevsceaeeneesarenesaes
`
`DCEMITIONS Looe cc cecccceceeceseceeesceesesessscanaceescssssseseoeenunecesseeaesneneneceeeeesensnesarercaesesssnens
`
`Symrbols and abbreviations ..... cc ecccssccsssesersnecsssesecseeeeessseesescesesseesseveaesersensseenassateves
`
`CONVENTIONS 0... ccccsecescsecesseeseeeseensceessesessaesneaecsssssssasecussessucaessecseraccesevensueessevsnsnessssases
`
`System Mescription 0... cccccecceccccneesccseeeers ess sesssseeceevecsseesssaeseesseeeseasstesensesreveeesate
`
`Tr fOrenmation StOQIMS oo. cc cceceseecesseneceseceencnssesesacusenscussacenesensaesasereserscseaenereensnesesetes
`
`Terminal Characteristics ....cccccsecccsccccssstesssecssesecssesessesaessecesssesessecesenesecsaesseuaeenenesnreraes
`
`]
`
`2
`
`§
`
`10
`
`13
`
`14
`
`14
`
`i4
`
`6.2.1
`6.2.2.
`6.2.3
`
`erminal elements outside the scope of this Recommendation ok is
`Terminal elements within the scope of this Recommendation... ee
`18
`Packet based network interface oo. cceseseceecseeeceecesceseneeseenecneoeeseeeesateases
`16
`
`
`
`
`
`GB.2.4—VideO COdGC ec cccccctcceeescctneceseseeesececenessaeenescasceseveseseetescnesereneseeetersnetiresetees i6
`
`
`
`G25—ANMIO CODEC ccc cecccecececetereeectuescsaetecesesasnesersnsseesaeenesseenesesesesasneeeeesesaeatoetes 17
`
`oN las
`
`6.4
`
`6.3
`
`6.6
`
`6.7
`
`6.8
`
`Receive pathdelay. cece cccssceeeesessssecesesevsececeevetesecaeeesseuevereearerennessseses
`6.2.6
`6.2.7 Data channel] oo. cece escecsecaceeeeecsssssesecasenssesestoesavacseaeresaseseenesenesevencaeanes
`
` H.245 control Antonccc eee cceaunenececese ceeeeneeeeecueesaseecueeseneeesaseneeas
`6.2.8
`RAS signalling function ..ccuccesssscecscsccsseccecsceesevessseesssesevesesetessesssevessvesseee
`6.2.9
`6.2.10 Call signalling fiction0 ceeeeecteeseeeeeeenees seeteeeeeneeeeees sessteeeeseeeees
`G2LL i225 0 Layer occ sccscsecccnecesesesnsesecsoneverccscenenseescesesevavesesaevesenenessasaeeneseaeressseatea
`
`Gateway Characteristics 0... cceccececsssesessceseccessesesecnassnesecesesecnecsessesnenanseseseeesneseneneenins
`6.3.1
`Gateway decomposition 0... cccccccccesessesesencsscseceeeneeecsecececeseeseceesaueaeesesseasans
`6.3.2 Gateway applicationsocc csescceseccneseusesssecesesnuecneesseseeesssesecsesaesaesaseas
`
`Gatekeeper Characteristics 0... ccccccsccsscsccenscesseseneseaaessscusnensneseeseaecueresereseasensnesanens
`
`Multipoint controller characteristics ....ccccccsescssssessesecvssesessvsnssscsesesscevsseeceneeevsngeeseaes
`
`Multipoint processor Characteristics 00... .ccsccsscsescsseessscssecsssesersescecssessassresoreresesscnaees
`
`Multipoint control unit Characteristics 0c cscssssesesesseestecessseneceeceseessesesateneeseasnesesans
`
`Multipoint capability... ccccssccscssssscssesssssceneserecsseseccrersuesesenscnssenessaseassateseeseesesessasa
`6.2.1
`Centralized multipoint capability oo. cccsescseceterecnsessetsecssersreevsteceses
`6.8.2 Decentralized mraltipoint capability... csscesseseneeseneseseesesecseeesrernerenaey
`6.8.3
`Hybrid multipoint -- Centralized audio... cece ceeceetsecenevteeveseeesnseaeens
`6.8.4 Hybrid multipoint — Centralized video... cccccccsecenscecncessesettecaneneesseesezes
`6.8.5
`Establishment of common mode 200... ccceccececsecesecee cece seenseenseseeeneeserteenenees
`
`6.8.6 Multipoint rate matching oc cccesessssseresenersenevececeasterscnesesensaesasneeesensareana
`6.8.7 Multipoint lip synchronization 00. cccscccsceceseeeecenessenecneecneteresesesnseanens
`6.8.8 Multipoint encryption... eeeeccssececetesacacecesnesenssecnaveccnesesensteeneceaenegeersnsen
`6.8.9
`Cascading multipoint control units oo... eee ccccneseseeeneceecenneteersveneeeeeanssseeess
`
`18
`1%
`
`20
`26
`27
`27
`
`27
`30
`36
`
`43
`
`4§
`
`46
`
`47
`
`47
`47
`47
`As
`Ag
`4%
`
`48
`49
`49
`49
`
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`Modeis for supplementary Services oo. ccs ccnseeeseesceeensesvsececsetesseseceavaeeseevsnseees
`
`Call SiGMaNING ees ccseeseressserececneceeenssensacsecnecetssenseeeeraecasaseseneaesavensensceeateneceeseaeersenes
`
`AGGreSSOS occ cssccssectctcceserscnnenecascceesesaseasenensceescessasaecescessvevsasueessnceenesesaeaseeteneeesereness
`
`TAA
`
`«Network address oo cccccccccccsencsesenececesecsessteseesuassecsususesecaessesaesatenaneseaseaeenes
`
`TAQ
`
` TSAP Identatier ec cccecccsenecnecsnenenssareateeceeeeeresenesseaennesessneneseeserceevsneneseses
`
`FAB
`
`Alias address... ccecseecsceeeseeeeeseetenene besebtegeuacenatersceeseenatees deteteseeuetenes
`
`TAA
`
` HiB23 URL scheinte oc ecccesccscecceeeeseeneeenereceesesacesecateseeseceuensneseserecesetenens
`
`Ag
`
`30
`
`50
`
`50
`
`3]
`
`31
`
`$i
`
`§2
`Registration, Admission and Status (RAS) chantiel oc cccscccsessesseteeeertreeeseees
`33
`FiBL
`Gatekceper GisCOVery cc ccccccccscsecsessesecececeetenecstesatessearsenssesecateneventesatenes
`54
`7.2.2
`Endpoint registration ccc eeeescecescesessseeeeeecensaeaecnasenceesuseseesscseseerssuaeneoeaeas
`S7
`7.2.3
`Endpoint Locator... ccc ccccseesesceseceesececeseeeeeeseceecaeceeeaeeaecaneneaeseeeseeeeeaeeaees
`7.2.4 Admissions, bandwidth change, status and disengage oo...ccc 57
`FAS Access tOkens eee ccc cee ceseneeneesesaceuceseseesacseseessecscenansecnenreneseneeseeeateaes
`57
`
`
`
`6.9
`
`~3
`
`71
`
`7.3
`
`apPn“toa
`
`a oo
`
`7.2.6 Alternate gatekeeper procedures ......ccccsscescereerscsesenssesecsccevsnecessevereeeseseaesues
`7.2.7 Usage information reporting... ccc ccccssececseesessctsesceseesesserseesentnesenereseees
`7.2.8
`Call credit-related capabilities 0c ccseceeetsetececesenetenasneeesecesecenseeeneeseseses
`7.2.9 Alternate transport addresses... cscs scseesesersetsessseseseecseceaessessreseseresensseaees
`
`Call signalling chantielocc cccecssssensserssecesscvssesuteneessececssscesecesersesseaaeseeenseseeensnenass
`7.3.1
`Call signalling channel routing... cccessecscsccrsesesssenseseccnsvessseseseeeeenarerseaes
`7.3.2
`Control channel routing ccc cccececcsseneeceeateecsessasenesecaeesecaenasereseeeaeeaseetenss
`7.3.3
`Call signalling and control protocol reviSiOns 0... ccc cccscssecsnecsstecssessneveses
`
`Call reference Value occ ccceseecsssesscnsceecsesscuseseesseeausecesesassacaeeseceaesssaesenseuneseaessoeoes
`
`CAL UD. ccc ccccccssseccsscsseesenssscsevsecasesscsesutesesaenseseesueetenscasssesasseevsssaenssesesusatenseneeeenesents
`
`Conference TD and conference 20a)... ccccceecccusessscescresccnsecescecseeneccoesevasnesenenesevenees
`
`Endpoint call capacity... ccc ccccccscscsenesseecesseescnsesreesesscaseceegarstensseseseenesiteauseseeesaeeets
`
`Caller identification SOrVIGeS oo... ccecesscscesececscersesecesesecatectaceassoneaecaeenssussecerenateesenestenee
`
`Description OF SCLVICES oo. cceeceeetecsenecereeenetsnsecscseaeeecaenaesesscnenstacenesesneees
`7.8.1
`7.8.2 Messages and information elements 0... cc ccsssesesesssscseseeseeneserenseerseneesass
`7.8.3 Actions at the originating endpoint 0.0. ccc ccsseeseeecnsensenseeeeneteeeseeeeeas
`7.2.4 Actions at the termimating endpoint... cceccsesssecseceesseectessvereseessseseneseses
`78S
`Actions at a gatekeeper... ccesesceeeessseseteesenseeseseavseecsccecserseseseseeneeenenenssiey
`
`$8
`69
`62
`63
`
`3
`64
`65
`66
`
`67
`
`67
`
`68
`
`65
`
`69
`
`69
`71
`72
`73
`73
`
`74
`
`75
`
`7.9
`
`Generic extensible framework o.oo cccecccceseeecseseee co ceseecsesussesaeseseenevesateneneeaeeseeaens
`
`7.9.1
`
`Format of a GenericData Structure cc ccsssscecesesssccesseeserseessrenseneesereeseeaes
`
`75
`7.9.2 Negotiation using the extensible framework-generaloo... cece eects
`78
`7.9.3. Negotiation using the extensible framework-RAS ooo eeeereeneeeenenenetees
`7.94 Negotiation using the extensible framework —call signalling oe 76
`
`Call signalling procedures ooo. ccccccccccecesesecerscseseseceneeeenseeaesaesauceessesasnucerveateasenseseetes
`
`78
`
`TFU-T Ree. 4.323 (11/2000)
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`8.1
`
`
`
`
`
`Phase A ~ Call Stup oo... cccccecccccsesssessssceesenscessscesseeenesessessasecseesasecuressesscseesseesneesnisenees
`8.1.1
`Basic call setup — neither endpoint registered oo... ceeesecnseecseretseenneeeees
`8.1.2
`Both endpoints registered to the same gatekeeper... ccs cceecueseeeeseeeees
`8.1.3
`Only calling endpoint has gatekeeper... cc ssesssssscneceseceecenecetenerersenesenetess
`8.1.4 Only called endpoint has gatekeeper ccc ceesecseteeecesesesessenecesereneenenese
`8.1.5
`Both endpoints registered to different gatekeepers occ eter eeeeees
`21.6 Optional called endpoint signallingccc ceeeeescseceesseeeessseasenseescneesees
`R.1.7
`Fast commect procedure oo... ccccccceccssscneesesseesseesssesnecenseesecesesereseseenssesatens
`8.1.8
`Call setup via 2ateways oo. ccccseecececceseseseseeserccerenecseestetenraees seveeteseneesaees bases
`8.1.9
`Call setup with an MCUoc ce ceeeee cece sseeeceeenectesatsessueeasnenetiaeaesees
`BAL TO Call forwarding... ccecccseseserescecssssevseseneseeessevapensestscateaseeseneseseseserseennscesess
`SLL] Broadcast call setap co.cc seccseessesscsesteeeescesesaesteesscnerssesesesseeseenaresesesesns
`B.E.E2 Overlapped Sending oe csccscsceseesreecesessneneevsececesecateaecaecanesecareaeeesenseseees
`8.1.13 Call setup to conference alias oo. ccssesseesscsssesssecsssesereceaesssecnssenssersnsonsees
`8.1.14 Gatekeeper modification of destination addresses oo... ecseseeretseerseeneees
`S.E.15
`Indicating desired protocols... .ccccccsseascceceectesseereccececssneerectestecestiesarens
`8.1.16 Gatekeeper requested tones and AMnounCeMments.... ccc ccsescesvsesesecensessees
`
`78
`78
`79
`30
`82
`%3
`a7
`35
`94
`05
`95
`95
`96
`OG
`97
`98
`9&
`
`Og
`Phase B — Initial commranication and capability exchange oc es eececseeeeeeeeeees
`8.2.1
`Encapsulation of H.245 messages within 0.931 messagesoe 99
`8.2.2
`Tunnelling through intermediate signalling entities oo eee ceerereneeneees
`10]
`8.2.3
`Switching to a separate H.245 COMMECTION......ccceccsseceeectscssessessesetenscneseneess
`101
`8.2.4
`Initiating H.245 tunnelling in parallel with fast connect... eee
`102
`
`Phase C — Establishment of audiovisual COMMMUMICAIONoo. ceccceeeseceeenereeeneeneeenes
`
`B.S.1 Mode changes 0... .cccssscccssecessesecsessesssessaeceesesecssesessseeessceseessesratenstenevsreeneses
`8.3.2
`Exchange of video by mutual agreement oo. cccccccsccessssesecesscessassnesenessnevsssns
`8.3.3 Media stream address distribution... ccc cccessenceeceesensessescsaeseesseesaesaeene
`
`104
`
`104
`104
`104
`
`8.3.4
`8.3.5
`
`Correlation of media strearns in multipoint conferences... eee 105
`Communication mode command procedures occ te ceeterne renee
`105
`
`8.4
`
`Phase D ~ Call services ccc ccecccccccsscecesesesesecssesesseresenessenscaeeneneceseanseeseaeteseneceaeeneeesens
`
`S.4.1
`BAZ
`
`Bandwidth changes ....cccccssscccssscsssssssseccsecssccssenevenensesesesesecesesesaesaesssssnseaes
`SUAS eee cece ceee ce cesnceseeteseseeeenscesesanenensceeesaeeeaens cececeaneeeeeessseseeeeeeenenes
`
`Ad hoc conference expansion... ic ccccccessesesescseecessesecetscerensessnecataneeeeenetesens
`8.4.3
`Supplementary Services oo. ccc cecsessecssesecseeerscesessesseenevscensesesesseneecnspeneseeeees
`8.4.4
`S$.4.5 Multipoint cascading 0. ccccsccsseessesssesenecenerersevssesenesssesessecenesersteravenseeetesee
`8.4.6
`Third party initiated pause and re-routing oo. ceeeececeeecteceeetsctseneeeens
`
`8.5
`
`Phase E — Call termination... cc ccccccccsesccssccssessesstessecstesceetenesesseseseatensstetseeneresesnass
`
`8.5.1
`8.5.2
`8.5.3
`
`Call clearing without a gatekeeper oo... cccscssserscsesescerseescssessseseseseenscesssesoes
`Call clearing with a patekeeper occ cceesesesnersesecesceeseeseessensnseeneees
`Call clearing by gatekeeper oo... cccccscccssecesesenecesecssessesenecensessueceesenesenanesatess
`
`106
`
`106
`108
`
`Hid
`119
`119
`126
`
`12]
`
`12}
`122
`122
`
`Vve+
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`Protocol failure handbag oo... cece ccccesecsecsesceecsuesecesesseesssssesececatsenesesessusesereseseees
`
`Interoperation with other terminal types... cc cc cccecsceesceecerecececsecenssnsesaneaecnrerseceseses
`
`Speech-only terminals... cece sscssceeeescscesessecsseneesesesecsaquesececeesessssaeveussecneseesaees
`
`Visual telephone terminals over the ISDN GTU-T Rec. H.3203 oo cccccenteeeees
`
`Visual telephone terminals over GSTN (ITU-TRec. H.3 24) ccccesssecteceneecneesiees
`
`Visual telephone terminals over mobile radio (TU-T Rec. H.324/M —
`AMMOX CHEB 24 ecccccscsescsscecncnesesssecesnerseaecesssesessesecsesesssesecerseeesasesstaseceeeeesnenesenes
`
`Visual telephone terminals over ATM(H.321 and H.310 RAST) oo eects
`
`Visual telephone terminals over guaranteed quality of service LANs
`CTO-T Ree. F322) ccc scsseececceccnreserscsenerevescrenessecenenecesavenaavacenesenaneaeseesoneneseenessaee
`
`123
`
`124
`
`124
`
`124
`
`124
`
`125
`
`128
`
`125
`
`Simultaneous voice and data terminals over GSTN (ITU-T Ree. V.70) ues 125
`
`
`
`8.6
`
`9
`
`9.1
`
`9.2
`
`9.3
`
`9.4
`
`9.5
`
`9.6
`
`9.7
`
`9.8
`
`9.9
`
`10
`
`T.120 terminals on the packet based NetWOTK...... ccc ccccsesssesecesecesseerenseeecesenetsrenesnecess
`
`Gatewayfor H.323 mediatransport over ATM.....cccccscsesssesecseceeceeseseseeneeessaeetoees
`
`Oyptional emhancements oo... cece cccccssssesesuescessssasenesecsesseessnusesecatssesecsaseuseeterseesseases
`
`LOL
`
`Emryprttn ec ccceccccecceeeeecenenececceecsesasaeaceneceuceeseaenseneesscsessnasestecaeenenesaresseteeeacessersaesece
`
`10.2 Multipoint operation oo... c ccc cscessceeeetesesessesenvevenscseseseusseusassaesesessqeaeeseseessanesseees
`16.2.1 H.243 control and indication 0. cceeessccserecseescescecececesasecueseecerenererenrerseenes
`
`10.30
`
`10.4
`
`Call Linkage in Hib 23 occ ccccccsesssesseseescesesscsseseeseesscressssseevsssenesesessavsesssusesreatenes
`10.3.1 Description... ccc cceecsesssesesesesscessvenecsssesasseecsesssvsasesetenseesacesseseresseseesenscatess
`10.3.2 Invocation and Operation 0. cecccceccccenecsceseencesseseseseceeenercneaesteceeeareeeeienaaes
`10.3.3.
`Interaction with F450 supplementary services occ ececeseceteeeteeneeenes
`
`Tunnelling of non-H.323 signalling Messages .....ccccecscsssseseeesececnesesenseeeeereteesesenees
`10.4.1
`Indicating support of tunnelled protocols... ceeeeectsesseetetetetereeeentenes
`10.4.2 Requesting a specific protocol tunnel to a gatekeeper oo. ceeccseereererneennes
`10.4.3 Tunnelling a signalling protocol in H.225.0 call signalling messages «0...
`10.4.4 Gatekeeper considerations 00... ccccccccccssesecerececerserssenessseceeeeseseussstenatestenesenese
`
`10.5
`
`Use of RTP payload for DTMF digits, telephony tones and telephonysignals .........
`
`126
`
`126
`
`126
`
`126
`
`126
`126
`
`126
`126
`127
`27
`
`129
`134
`13]
`131
`132
`
`132
`
`i]
`
`Maintenance occ scesesssscseseaceenseecseeneacosenetessenaseaeausesseseeaenssececnensesesasietareeeseraeatees
`
`133
`
`
`
`LL.1|Loopbacks for maintenance Purposes... cccccsecssetecnsesecerseeseeesconesecseeessceceseessiseetenesecets 133
`
`11.2 Monitoring methods... .cccscscscsssenesscsceserecssrssestecseenssrseseneveesersseusnenesseseareeseesevaneass
`
`Annex A — H.245 messages used by H.323 endpoints oo... ccc ccecsescesccsesesesesesseneseveetensceaee
`
`Annex B— Procedures for layered video COdGCS oo... ccecccensecccecesscnstenutsccessesscnatesetnsesseensetens
`
`Bl
`
`B.2
`
`B3
`
`B.A
`
`SCOPC .. ceeesccsssecneesseeecenecssesenacsceeusressecnassanesenevsseaseneaesenssatsesacerecsceneseneasererasnevesesesaees
`
`Petrouection oc eee ccseseeesscnecsceeesecessceeacneeeesecaecseaeenesecesesnseeecsesesneanaesieaeceeeeesenessseas
`
`Scalability methods 0... cscesccscecesecerecenteseeesssecanesaeceseesanecauessaesssnessnesevacesaeeraeessecesere
`
`Call establishment... ccc cc csecceccesecceeseceecasereeseeseueuseeesesaetuesenaesesestseseseeseeenersetieseges
`
`134
`
`134
`
`139
`
`139
`
`139
`
`139
`
`139
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`TPU-T Ree. H.323 (11/2000)
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`B.S
`
`Use of RTP sessions and codec Layers... cies ccccnceseesecsecetesseeseeseaeeeteuecerevensesesaeeaen
`B.S.1 Associate base to audio for Hip synchronization oo... ceeesseeceeecereeneeeneteees
`B.S.2
`Enhancement layer depondency oo... cc ecceccseeccseeeseseecenetesceeeseseseveaseesseanents
`
`B.6
`
`B.A?
`
`B.S
`
`Possible layering models oo... cee ccscecscceceeeenececenecevee see ceseeauessecasesseeeescatsnereaesaseenetats
`B.6.1 Multiple logical channels and RTP sessions for a layered stream oo.
`B.6.2
`Impact of one layer per logical channel and per RTP session...
`
`Impact on multipoint Comferences cece ceeccesenececeeeaeeeseneseneeenenecaenecatenerervesesesees
`B.7.1 MCImpartial model oo ceecesceseceseseaeeterersteseeeveesseceeesaeestetateneeneeeessenee
`B.7.2 MC Deoiston model ccc cecceecceceeecseaeceeceesneeeceaececeeeeevevsceaneaseeeenenesene
`
`B.7.3 Multipoint conference containing endpoints on different bandwidths...
`Useof network QOS for layered video Stre@ims occ ccceccecceseeneeeceenenctetceeaecaevenenens
`
`Ammex C - F323 On ATMoc cccccssseseeceseceneseneecneeenecennesenasennevensoeneseneesaeseseenesesenssunenseseeesenenans
`
`139
`140
`146
`
`14]
`14]
`141
`
`142
`142
`142
`
`142
`ld4
`
`144
`
`144
`
`Cl
`
`C.2
`
`TmtroductiOn......ccceseseccsccssestsesseeecenscnsecsscseeeaserensrssaeesesessceesesestoenusasesesesessaeeasenessaseneeaay
`
`144
`SCOPC. eeccecescecscseseesncesssecescneeceseseseseenetseeesinenaeceeteesieteas sca seedaaeneasseuneegeeaueresavegeneseeeaene
`C.2.1
` Point-to-point conferencing 0. cece eseseeenereee ses eneneseesesveeseseseaneseaes — 145
`C.2.2 MCU-based multipointcc csceseceeeeneessesesseeveeeceesceeseeesnetateneeeeeennenes
`148
`C.2.3 H.323 interoperability with endpoints using [Poo ee cccecnseateteeceenenenenes
`148
`
`C.3
`
`APChitecture oo cce cess csceneeseceeceeseceeeenceeeeeceeseecaeeaeeseuseeeneeseeveescreseseenievaveeseenasnaeaie
`
`C3.) Overview Of SYStCIND oc cccccseseseecseeceseneeeeaeecnanensaererereneesenesevareanenteesenetens
`C.3.2
`Interoperation with other ITU-T H-series Recommendations endpoints......
`C.3.3 H.225.0 on TP over ATM... cc cescccseeccenseseseceensceeeneseneeeeaseneenessesanearseeeneesseaee
`
`C.3.4
`
`4.245 on TCP/IP over ATMocc cceccccccsssesces cesses seseeeenetsecsesseeaereveeseaenenneeesen
`
`148
`
`145
`146
`146
`
`146
`
`146
`C.3.5 Addressing for A/VStreais ooo. cc cccecserecesecaceenenesseaseresaseeneeetveeseesnanenees
`C.3.6 Transport Capabilities added to TransportCapability Set. eee 146
`C.3.7
`Elements of ATMsignaling oo eee crerecneteerseeecreenveaenesneeesnernrseas
`146
`C.3.8 A/V streams on RTP On AALS. ceseeeescneeneceseneneeererneneeneneterenarneeeseees
`147
`
`C.3.9 QOS considerations (Optional oo. ce cece creesnueene sees seeneeenaeeseseneeecees
`
`C4
`
`Protocol SOCHON ie cccescsesssenetescneceeeeeeccsesseeeaensassaceaesesraecanenenenasertesesenevraeeaereaesenesessees
`
`ATMsignalling information clements occ cece eneesenereneceetseennneneeeesen
`C.4,1
`C42 H.24S Usage oo ceecccecccccnnneeesecerenecesscaesusecuseacerssneedsenecnansesueeeecierensnaeesvanenegs
`C.4.3 RIP USage... ccccscssecceccenestsesessnraestnecnsvssessacegusessoesacessscaneregesersesensenesnseseses
`C.4.4
`Interoperation with H.323 on TP oo ec eeeceeneecreeveeseesaeeneeenenesaeeneeeseneeanye
`
`Annex D — Real-time facsimile over H.323 SYSteris oo .cececcceceeccteececsereensceeeteteneeneneeraeaeses
`
`DA
`
`D2
`
`D3
`
`TtroductiOn.... cc cccccccesccssscsssesetesorscevsaesasecesecenssiaesecserseeeuesesessoeereseneseseseonanonesenenasenats
`
`SCODQ.cccecccececceeceeceseesceeseecegenereesesseeeseasenetaeeensaeseeeaeestenessasueseaeseseseeseaeeeeenesseeensesneeeaea
`
`Procedures for opening channels to send T.38 packets 0... eecesereseneeeterererreenes
`D.3.1 Opening the voice Channel oo. eccccssectcee tes cresereceoaeceeeenerestatenenneegenievise
`D.3.2 Opening the facsimile channels oo cece eeeerecenreeneenenreenesee penne censeeaes
`
`148
`
`150
`
`150
`182
`153
`153
`
`154
`
`154
`
`188
`
`155
`155
`ISS
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`Viit
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`ITU-T Rec. 9,323 (11/2006)
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`D.3.3° DIME transmission... ccc eccecnececscnecsseneenersreesseeseeenstereesasnetatersaeeeeaenetatees
`
`D.4
`
`DS
`
`D6
`
`D7
`
`Non-Fast Connect procedures... ..ccccscccesetsrecerseseseseseesrcrsesaesesesecusessesenesatssareneeasenases
`
`Replacing an existing audio stream with a 1.38 fax stream oo. escent eeeeesees
`
`Usage ofthe MaxBitRate in messages oo... ecsenecsecssesceeceeeceeereeeceeeaceaeeaenseeaeeaneaens
`
`Interactions with gateways and T.38/Annex B devices occ esecccetcsestsrenecneneeesnnaenes
`
`Annex E ~ Framework and wire-protocol for multiplexed call signalling transport...
`
`El
`
`SCOOPS. eecceeccesccsscseseeterusseesnsnanececssesasusavsusesucasesassstenenesesssscnsseeveoecnasqecssaeaagereteeeeecneeaees
`EDL
` Tintrodhictiont occ ecccececeeceneseseecceeeeneseaesseseasscesseceaesasecseceneseserestaeeesenesntesaes
`
`Signalling models oc cccceccesecesssesenesenecssecersesenecresssesnetesaneeseetsseevieenens
`E.1.2
`F.1.3 Optional payload fictds o.oo cccccccnccnsecsseaceecessensesessaeesencecrenessneasenesonenesreate
`ED Wire-protocod. ccc ccsccccesscneeeteteeesssesavsnsesecssesasescusecscasesasengeasenaeenevensesesaus
`
`E.2
`
`H.225.0 call signalling over ANNOX Eo... ccessesssesecerersccenssseetecsuerensnesascnatenecersenecess
`E21 Rationales... ccccccseeccesscrsecscsseosseeeesressssoseenscnessessseeevessenssesestseceseneneatieesees
`
`E.2.2 H.323 Call-Setup using this annex 00... cceccsceecscseeereeeceeeeeseceecereneeeaesereeeenes
`E.2.3
` Specefics. oe. cece cesesssssceceeeesesenecsensecsecensaeaseaseceeeeseasaesseveceneceneeneanenenenesasenens
`
`Annex F — Simple endpoint types. cc eeeseeceesesneesseneeereesessseceeceesnesaessesneeavsesesenecgsees
`
`Fl
`
`F.2
`
`F.3
`
`FA4
`
`FS
`
`F.6
`
`B7
`
`Ttrod ction... cc ecceccccsesssesecsecseseeecsseeseseseseseenessseauseseeseuseseeaesesacsessesneneateesersesaseneteay
`
`SPCCHACATION CONVENTIONS ...cccesessescstseceseesesenssestreseeccescrenesessssareecnestneseseagenteesesnesaea
`
`SCOPC. cecccccccssesssssesesececesscsssesececeeeeeeenssseatesecesseessaneatenseessassautesateagesnaaeadvaasersayeuseesante
`
`Normative references oc. ceceseceeserensnsesecansceenesesseneseseacsesnenenesesvanaeneenevessenerseseesseaes
`
`ADDreViatiONns oo... cecccce cscs cesceeeecesceseceeeateneeececesesacesecaueasesesaseaeerecescsenesesesersaeseeaesersateas
`
`Simple (Audio) Endpoint Type - System functionality overview oe
`
`Procedures for Simple Endpoint Types oo... ccc csceecrenenerecscneeeeesenerevarescneenenseeoneese
`F.7.1
`RAS Signalling (H.225.0 RAS). ceceeecseseceseseeneeetseseeeneeeneneneteeetacneneevents
`F.7.2
`Call signalling (H.225.0 Call Control) 0c cccccscseenerecersseeeereeetenenereneneeeate
`F.7.3 Multimedia system control signaling CH.245)eee eceeeeeeeeeeeeneneeees
`F774 Media Exchange occ ceccscneeccecesceceseceesaececnesnaseetssesavsesesensnerereseneresccess
`F.7.5
`Supplementary services (HLASO.K)cc cesencscsssecnseseceereteseseseseceeenseseatneetaes
`F.7.6
`Third-party initiated pause and re-routingoe ceceeescesnseenesecanerseeeneteees
`P.7.7)
` Conference-mode Operation.........ccccccccssscsessescecssesecsseeseeseccsseesescessneseeesssases
`F.7.8
`Support for loosely-coupled conferences (ITU-T Rec. H.332).0
`F.7.9 Management Information Bases (MIBS) oc ccesceseesereeenenecneeetesererenerereats
`
`F.8
`
`F9
`
`F.1G0
`
`SOCUTILY OXTCTISIONS coo cece cecesecnnecneeseeterseeceaesueeaenssnsesesesueseessvepsaeaseeeceesusesasenaeas
`
`Interoperability considerations... eee sseneccseseneeecersnenenetenseetensesesecsunecneeassesesesees
`
`Implementation notes (informative) oo... eee cccscscsssseteccseceseresesecneseenssessscareneseesnaeeeoe
`F.10.1 Open Logical Chane... ccccescceecscenscenevecenercceecececeaecneeeesereesetsereesnneerseata
`
`158
`
`138
`
`166
`
`164
`
`164
`
`164
`
`164
`
`165
`
`167
`
`168
`
`168
`TTLif
`
`178
`
`17%
`
`180
`
`181
`
`181
`
`182
`
`1&2
`
`183
`
`183
`
`183
`
`184
`
`184
`
`185
`
`185
`
`189
`
`189
`
`1&9
`
`190
`
`194)
`
`190
`
`19]
`
`19]
`
`19}
`
`19]
`
`ITU-T Ree. 4.323 (11/2060)
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`1X
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`Annex G — Text conversation and Text SET oo. ccccccccsccccseusecssesevecestasecesesecsucevensseceneresns
`
`Gl
`
`G2
`
`G3
`
`G4
`
`G.5
`
`G.6
`
`G.7
`
`G.8
`
`G9
`
`Introduction... esc cseeecteseeesesenetseacceceuevsesesassasaceeesessteseseaesaeeessesauseessaeeesesvantesaeneeaes
`
`SCOPC. scscsceccseccssecsaecssuevsuessecsessessucceuscenssesseserscescssaseecentecssesssesseeeestesssessueseaeessnessneseaeess
`
`RePTONCES ee cccesececeetenessseseececseeececsacanseescoesessssseetesssesassssgateneeeessuaeseeesaunesssereeesasy
`
`Definitions ooo. eceecetesececseeeesesessstesecusececsesesersaersvseceseceseaeesseeesesenenetasereaeenenesase
`
`Procedures for opening channels for T.140 text conversation... eee eee
`
`Framing and buffering of T.140 data.cc cccsenecsesenseeseseneceeeseseesesecetsneeeesneneces
`G.6.1
`Common considerations 0... cccccsesscsssssssscssonscssssssseneseseccenscesazeeeseesensaessoeases
`
`G.6.2 Usage of reliable channels 0000 ccc ccsceeescesesececseaecoenseseceesenesennseneeseneeess
`G.63 Usage of unreliable channels 0... cccccccccsessenessecssssseeseacsssscecrsascsecencaesersaesases
`
`Interaction with text conversation facilities in other deViCes ooo. ccscsseeeetceeeeeecees
`
`Multipoint COMSIGCTALIONS oo cecscessesesucseeseeeceanenesecsecsseseuasenucetssecsessnetateteneceessseteness
`G.8.1
`Situations for multipoint text COMVETSATLON oc cecsseccsccesssessesersnerecserseseoes
`
`Text SET: Text Conversation Simple Endpoint Type oo... ceccccccceseseceseeseesetereecenes
`G91
`Introduction to Text SET occ ccscccceesessseeaeesescesssesenseseneceseneaessssenesencneseses
`
`G.9.2 Text SET System Functionality Overview (F.6/H.323) cc csecceeeteenreeees
`G.9.3
`Procedures for Text SET devices (F.7/H.323) oo. cccccsccscsretestseseeeteesesesssanes
`
`G.9.4 RAS Signalling