ITU T.90:1992

ITU T.90:1992 Characteristics And Protocols For Terminals For Telematic Services In Isdn Defines the functional profile for base standards ISO/IEC 7776, 8208 and 8885 to provide the lower layers of the telematic services protocol stack when operating on the ISDN.

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Table of Contents

1Scope
1.1General
1.2Useofbearercapabilities
1.3Protocolarchitecture
2ISDNB-channelcircuit-switchedmode(DTE-DTE
communication)
2.1Protocolset
2.2Applicationrules
3ISDNB-channelpacket-switchedmode(DTE-DCE
communication)
3.1Protocolset
3.2Applicationrules
4SupportoftheOSI-networkservice
4.1RationaleforconsideringtheOSI-NS
4.2CCITTRecommendationsandISOstandards
4.3RequirementsfortheOSI-NS
5AdditionalX.25optionaluserfacilities
5.1Categoriesofadditionalfunctions
5.2Functions
6InteractionsbetweentheD-channelandB-channel
7Supplementaryservices
8Terminalresponsetime
9Synchronization
10Higherlayerprotocols
10.1Group4facsimile
10.2Teletexal
10.3Videotex
AnnexA-Proceduresforconnectionestablishment,
connectionreleaseandinformationtransfer
AnnexB-ISDND-channelpacket-switchedmode(DTE-DCE
communication)
AnnexC-ProceduresforB-channelnegotiationoflayer
2parametersfortelematicterminals
AnnexD-SDLdiagramforlinksetupforSABM/SABME
procedures
AnnexE-SDLdiagramforlinksetuptoaT.90compatible
terminalforXIDprocedure
AppendixI-FacsimileterminalsintheISDN
AppendixII-OptionalusageoftheT.70NLprotocol
AppendixIII-Servicedefinitionsandstatetransition
diagramsforthedatalinklayerwithinthe
B-channel(CSmode)
AppendixIV-Possiblemodelfortelematicendsystemstaking
intoaccounttheD-channel/B-channel
coordinationfunction
AppendixV-Rateadaptationfunction
AppendixVI-Recommendedcombinationsofparametervalues
toensureoptimumthroughput
AppendixVII-Alphabeticallistofabbreviations

Abstract

Defines the functional profile for base standards ISO/IEC 7776, 8208 and 8885 to provide the lower layers of the telematic services protocol stack when operating on the ISDN.

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