ITU H.450.4:1999
ITU H.450.4:1999 Call Hold Supplementary Service For H.323 Describes the procedures and the signalling protocol for the Call Hold supplementary service in H.323 (Packet Based Multimedia Communications Systems) networks.
Table of Contents
1Scope2References
3Termsanddefinitions
4Abbreviationsandacronyms
5Description
5.1Near-endcallhold
5.2Remote-endcallhold
6Messagesandinformationelements
7Actionsattheholdingendpoint
7.1Normalprocedures
7.2Exceptionalprocedures
8Actionsattheheldendpoint
8.1Normalprocedures
8.2Exceptionalprocedures
8.3Additionalprocedures
9Inter-working
9.1Inter-workingwithSCN
9.2Inter-workingwithothersupplementaryservices
9.3InteractionwithH.225.0parameters
10Gatekeeper/proxyactions
10.1Remote-endcallhold
10.2Near-endcallhold
11Dynamicdescriptionfornear-endcallhold
11.1Operationalmodelsandsignallingflows
11.2Communicationbetweenholdingsignallingentity
(HGSE)andholdingsignallingentityuser
(HGSEuser)
11.3Communicationbetweenheldsignallingentity
(HDSE)andheldsignallingentityUser
(HDSEuser)
11.4Timers
11.5Counters
12OperationsinsupportofSS-callhold
13SDLs
13.1Near-endcallholdSDLs
13.2Remote-endcallholdSDLs