ITU G.725:1988
ITU G.725:1988 System Aspects For The Use Of The 7 Khz Audio Codec Within 64 Kbit/s
Table of Contents
1General2Transmissionmodesandterminaltypes
2.1Transmissionmodes
2.2Terminaltypes
2.3Establishmentofcompatiblemodesofoperation
3Framestructure
4Basicsequencesforin-channelprocedures
4.1Modeswitchingsequence
4.2Capabilityexchangesequence
4.3Framerecoverysequence
5InitializationandMode0forcing
5.1Modeinitializationprocedure
5.2Mode0forcingprocedure
5.3Modemismatchrecoveryprocedure
5.4Recoveryfromunexpectedlossofframealignment
6DynamicmodeswitchingprocedureforType2terminals
6.1Dynamicmodeswitchingfromaframedmodeto
anotherframedmode
6.2Dynamicmodeswitchingfromaframedmodetoan
unframedmode
6.3Dynamicmodeswitchingfromanunframedmodetoa
framedmode
6.4Dynamicmodeswitchingfromanunframedmodeto
anotherunframedmode
7Networkconsiderations:callconnection,disconnection,
andcalltransfer
7.1Callconnection
7.2Terminaldisconnection
7.3Calltransferencodedby-laworA-lawPCM
7.4Conferencing
7.5PCMformatconversion
APPENDIXI-Analgorithmtodeterminewhetheran
incomingbitstreamwas
I.1Basicdeterminationalgorithm
I.2Possibleextensionsandrefinements
I.3Proposeduseofthealgorithm