Table of Contents
FOREWORD
1Scope
2References
2.1Normativereferences
2.2Bibliography
3Definitions
4Abbreviations
5Conventions
6Referencemodel
7Functionaldescription
7.1Transmitterfunctions
7.2Receiverfunctions
8Servicesprovided
8.1Audioservice
8.2Circuitmodedataservice
8.3Framemodedataservice
8.4Dialleddigitsservice
8.5Channel-associatedsignallingservice
8.6Facsimiledemodulation/remodulationservice
8.7Alarmsservice
8.8Statecontrolservice
8.9Ratecontrolservice
8.10ChangeSSCSoperationservice
8.11Loopbackservice
9Meanstoachieveisochrony
9.1Delayvariationinuserprocessing
9.2DelayvariationbelowtheSSCSsublayer
10Packetformattypes
10.1Type1-Unprotected
10.2Type3-Fullyprotected
11Commonfacilitiesfortype3packets
11.1Relativeeventtiming
11.2Tripleredundancyandrefresh
12UUIcodepointassignments
13Encodingformatprofiles
13.1Thefunctionofaprofile
13.2Relationshipofservicedataunitandsequencenumberinterval
13.3Examplesofprofilestructure
13.4Mandatoryprofilesupport
14Sequencenumbering
14.1Basicprinciples
14.2EmbeddinginUUIcodepoints
14.3Incrementingduringsilence
14.4Changeofsequencenumberinterval
15Circuitmodedata
16Framemodedata
17Facsimiledemodulation/remodulation
17.1Functionalrequirements
17.2Twomethodsofanalysis
17.3Optionalsupportofnon-standardfacilities
17.4TransparencyforT.30data
17.5Timingrequirements
17.6Startingandstoppingfacsimiledemodulation
17.7Facsimiledemodulationpackets
18SSCSparametersofoperation
ANNEXA-Specificationofaudioencodingformats
ANNEXB-EncodingformatforaudioalgorithmG.711
B.1General
B.2Encodingdataunit
ANNEXC-EncodingformatforaudioalgorithmG.722
C.1General
C.2Encodingdataunit
ANNEXD-EncodingformatforaudioalgorithmG.723.1
D.1General
D.2Encodingdataunit
D.3Silenceinsertiondescriptor
ANNEXE-EncodingformatforaudioalgorithmG.726
E.1General
E.2Encodingdataunit
ANNEXF-EncodingformatforaudioalgorithmG.727
F.1General
F.2Encodingdataunit
ANNEXG-EncodingformatforaudioalgorithmG.728
G.1General
G.2Encodingdataunit
ANNEXH-EncodingformatforaudioalgorithmG.729
H.1General
H.2Encodingdataunit
H.3Silenceinsertiondescriptor
H.4G.729-6.4encodingdataunit
H.5G.729-12encodingdataunit
ANNEXI-Encodingformatforgenericsilenceinsertiondescriptor
I.1General
I.2Packetformat
I.3Procedures
ANNEXJ-EncodingformatforcircuitmodedataatN*64kbit/s
ANNEXK-Packetformatandproceduresfordialleddigits
K.1General
K.2Packetformat
K.3Transmitterprocedures
K.4Receiverprocedures
ANNEXL-Packetformatandproceduresforchannel-associated
signallingbits
L.1General
L.2Packetformat
L.3Transmitterprocedures
L.4Receiverprocedures
ANNEXM-Packetformatandproceduresforfacsimiledemodulation
M.1Facsimiledemodulationcontrolconcepts
M.2Facsimiledemodulationcontrolpackets
M.3Facsimileimagedatapackets
ANNEXN-PacketformatandproceduresforOAM(alarmsandloopback)
N.1General
N.2Packetformat
N.3Procedures
ANNEXO-Packetformatandproceduresforuserstatecontrol
O.1General
O.2Packetformat
O.3Procedures
ANNEXP-Predefinedencodingformatprofiles
ANNEXQ-EncodingformatforaudioalgorithmAMR
Q.1General
Q.2EncodingDataUnit
Q.3SilenceDescriptor
ANNEXR-Packetformatsandproceduresforratecontrol
R.1General
R.2Packetformat
R.3Transmitterprocedures
R.4Receiverprocedures
ANNEXS-PacketformatsandProceduresforsynchronizationofchange
inSSCSoperation
S.1General
S.2Packetformat
S.3Transmitterprocedures
S.4Receiverprocedures
APPENDIXI-AALType1interworkingbetweenN-ISDNandB-ISDN
I.1Informativereferences
APPENDIXII-Simplederivationofthemodulusforsequencenumbering
II.1Packetflowtimingnotationandrelationships
II.2Simplederivationofthemodulus
APPENDIXIII-Examplefacsimiledemodulationscenarios
III.1Typicalfacsimiledemodulationscenario-Normalcompletion
III.2Fallbacktovoicebanddata-NSSnotsupported
III.3Fallbacktovoicebanddata-demodulationfailure
APPENDIXIV-ExamplefacsimiledemodulationV.17training
APPENDIXV-Protocolimplementationconformancestatement(PICS)
proforma
V.1Introduction
V.2PICSproforma
APPENDIXVI-UseofthisRecommendationformobileapplications Abstract
Specifies a Service Specific Convergence Sublayer operating over the Common Part Sublayer of an AAL type 2 connection. Its purpose is the conveyance of narrow-band calls comprising voice, voiceband data or circuit mode data. Defines packet formats amd methods for encoding the different information streams for bandwidth-efficient transport by AAL type 2, accommodates known methods of low rate audio encoding, silence compression and facsimilie demodulation/remodulation and provides for in-band signalling of narrow-band calls and control of the SSCS operating state.
