Table of Contents
1Scope
1.1Recommendationversion
2References
3Definitionsandabbreviations
3.1Definitions
3.2Abbreviations
4Conventions
5Introduction
5.1Compliancerequirements
6Modem-over-IPgatewayfunctions
7Audiomode
8Voicebanddatamode
8.1SelectionofVBDvoicecodecsandotherenhanced
functionality
8.2MinimumrequirementsforVBD
9Modemrelaymode
9.1Universal-modemrelaygatewaytype
9.2V.8-modemrelaygatewaytype
10OperationalmodesofMoIP
11ModemrelayPHYlayerfunctions
12Modemrelayerrorcontrolfunctions
12.1Errorcontrolconfigurations
12.2Error-controlledPSTNlinks
12.3Non-error-controlledPSTNlinks
12.4Breakhandling
13Modemrelaytrans-compressionfunctions
13.1NoTrans-Compression(N-TCX)
13.2SingleTrans-Compression(S-TCX)
13.3DoubleTrans-Compression(D-TCX)
13.4Mixed-functionoperation
13.5Hierarchyforinteroperability
13.6XID/LRprofilesforuseinmodemrelayconnection
scenarioMR1
14Modemrelaydatatransfer
14.1Datatypedefinitions
14.2SupportofDLCI
14.3Generalstatementontheuseofstart-stop
characters
14.4Selectionofdatatypes
14.5Mandatorymodemrelaydatatypes
14.6Optionalmodemrelaydatatypes
14.7Gateway-to-gatewaycontrolchannelfunctionality
andinterfaces
15Modem-over-IPfunctionalityandinterfaces
15.1Gateway-to-gatewayprotocoldefinitionsand
procedures
15.2Gatewaycapabilityandcallset-upmessages
15.3Gatewaycalldiscriminationmessages
15.4Modemrelaystatusmessages
16Start-upmodeofoperation
17Facsimileinterworkingrequirements
18Texttelephonyinterworkingrequirements
19Callsetupprocedures
20Calldiscriminationprocedures
20.1V.25callingtone,V.8CIprocessingandbell-type
modemanswertone
20.2V.8bisprocessing
20.3Calldiscriminationprocedure/answertonetreatment
selection
20.4Answertoneprocessing
20.5Modem-over-IPmodeselectionprocedures
20.6CM-JMproceduresfordeterminingMoIPmode
20.7JMdelayprocedure
20.8CalldiscriminationSDLdiagrams
21ProceduresforaudiotoMoIPtransportswitching
22Proceduresformodemrelayoperation
22.1ProceduresusedforgatewaytoDCEerrorcontrol
22.2Compressionnegotiationprocedures
22.3Datatransferphase
23Modemdelayprocedures
23.1Initialstartup
23.2Retrainandraterenegotiations
24Cleardownprocedures
25IPtransport
25.1SPRTpacketstructureforMoIP
25.2MoIPcontentheader
AnnexA-ASN.1notation
AnnexB-SimplePacketRelayTransport(SPRT)protocol
B.1Overview
B.2SPRTtransportprotocolspecification
AnnexC-Statesignallingeventsprotocol
C.1Introduction
C.2Definitionofmediastates
C.3RTPpacketformatforstatesignallingevents
C.4Reliability
C.5Statesignallingeventdefinitions
AnnexD-Proceduresforvoicebanddataonlymodeof
operation
AnnexE-SDPdescriptionofsessionssupporting
SPRT-basedmodemrelay
E.0Abbreviations
E.1Introduction
E.2Optionalinformation
E.3ExamplesofcompleteSDPdescriptors
AnnexF-Definitionofcapabilitiesforusewithin
H.245-basedsystems
F.1Scope
F.2Introduction
F.3ModemoverIP(MoIP)capabilityidentification
andexchange
F.4MoIPcapabilitydefinitionsyntax
F.5ExplanationofV150MoIPCapabilityelements
F.6SSEcapabilityidentificationandexchange
AppendixI-Connectionscenarios
I.1Voicebanddata(VBD)mode
I.2ModemrelayconnectionscenarioMR1
I.3ModemrelayconnectionscenarioMR2
I.4ModemrelayconnectionscenarioMR3
I.5ModemrelayconnectionscenarioMR4
AppendixII-Calldiscriminationcallflows
II.1Scope
II.2Answertonetreatment
II.3Calldiscrimination
AppendixIII-Calldiscriminationcallflowssuitablefor
usewithfacsimile-over-IP
AppendixIV-Calldiscriminationcallflowssuitablefor
usefortext-over-IP
AppendixV-SummaryofDCEsignalsusedduringcall
discrimination
V.1DefinitionofanswerDCEgeneratedsignalstobe
consideredfordiscrimination
V.2DefinitionofcallingDCEgeneratedsignalstobe
consideredfordiscrimination
AppendixVI-Descriptionsofnon-V-seriesmodesofoperation
VI.1Bell103modeofoperation
VI.2Bell212Amodeofoperation
VI.3TIA/EIA-825modeofoperation
VI.4MNP5modeofoperation
AppendixVII-Gatewayimplementationguide
VII.1Scope
VII.2VBD
VII.3RatecontrolforconfigurationsusingSPRTchannel1
VII.4XID/LRprofiles
AppendixVIII-Bibliography Abstract
Defines the inter-operation of two PSTN to IP network gateways that facilitate the end-to-end connection of V-series DCEs over an IP network.
