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ITU V.110:2000

ITU V.110:2000 Support By An Isdn Of Data Terminal Equipments With V-series Type Interfaces Defines terminal adaptor (TA) functions for the connection of terminals having interfaces conforming to current V-series Recommendations to the ISDN for both circuit switched and leased circuit servic

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Table of Contents

1Scope
2References
3Abbreviations
4Referenceconfigurations
4.1Terminaladaptorreferencemodel
4.2Connectiontypes
5LinesignalsatSandTreferencepoints
5.1Bitrateadaptionofsynchronousdatasignalling
ratesupto38.4kbit/s
5.1.1Generalapproach
5.1.2AdaptionofV-seriesdatasignallingrates
totheintermediaterates
5.1.3Framesynchronizationandadditional
signallingcapacity
5.1.4Adaptionofintermediateratesto64kbit/s
5.2Rateadaptionof48and56kbit/ssynchronoususer
ratesto64kbit/s
5.2.1Framesynchronization
5.3Adaptionforasynchronousratesofupto38400bit/s
5.3.1Generalapproach
5.3.2Supportedasynchronoususerrates
5.3.3Asynchronous-to-synchronousconversion(RA0)
5.3.4Overspeed/underspeed
5.3.5Breaksignal
5.3.6Paritybits
5.4FlowcontrolforusewithTAssupporting
asynchronousDTEs
5.4.1Localflowcontrol:betweenTAandDTE
5.4.2End-to-end(TA-to-TA)flowcontrol
5.4.3Useofchannelcapacity
5.4.4RequirementsofaTAsupportingflowcontrol
6Interchangecircuits
6.1Essentialandoptionalinterchangecircuits
6.2Timingarrangement
6.3Circuit106
6.4Circuit109
6.5Electrical/mechanicalcharacteristicsofinterchange
circuits
6.5.1BasicISDNuser/networkinterface
6.5.2TE2/TA(DTE/DCE)interface
6.6Faultconditiononinterchangecircuits
7Operatingsequence
7.1TAduplexoperation
7.1.1Idle(orready)state
7.1.2ConnectTAtolinestate
7.1.3Datatransferstate
7.1.4Disconnectmode
7.1.5Lossofframesynchronization
7.2TAhalf-duplexoperation
7.3Automaticcalling
8Network-independentclocks
8.1Measurementofphasedifferences
8.2Positive/negativecompensation
8.3Encoding
9In-bandparameterexchangestate
10Testingfacilities
AnnexA-Referenceconfigurations
A.1Introduction
A.2V.110terminaladaptorreferencemodel
A.3Terminaladaptiontype
A.3.1Terminaladaptor-TypeA(TA-A)
A.3.2Terminaladaptor-TypeB(TA-B)
A.4Typesofend-to-endconnection
AppendixI-In-bandparameterexchange
I.1Introduction
I.2Definitions
I.3Overview
I.4Referenceconfiguration
I.5Procedures
I.5.1General
I.5.2Initiatingtheexchange
I.5.3Parameterexchange
I.5.4Re-synchronizationtoanewintermediaterate
I.5.5Datatransfer
I.5.6InterworkingwithaTAnotsupportingIPE
I.5.7Maintenance
I.5.8Re-enteringIPEfromthedatatransferstate
I.5.9Errorprotectionandhandling
I.6Coding
I.6.1General
I.6.2Rateadaptionversionidentification
I.6.3Control
I.6.4Parameters
I.6.5Status
I.6.6Maintenance
I.7Timervalues
I.7.1Timervaluesforparameterexchange
I.7.2Timervaluesformaintenance
I.8Statetransitiondiagrams
I.8.1General
AppendixII-V.25bistoQ.931protocolmapping
II.1General
II.2Callorigination
II.2.1Callset-up
II.2.2CallreceivedfromremoteDTE/TA
II.3Callclearing(FiguresII.2andII.3)
II.3.1DISCONNECT(fromTA)
II.3.2DISCONNECT(fromexchange)
II.3.3DISCONNECT(In-bandbetweenTAs)
II.3.4RELEASECOMPLETE
II.3.5Negativeresponsetoanincomingcall
II.4Directcall
II.4.1DirectcallDTEcallset-upandclearing
II.4.2DirectcallDCEcallset-upandclearing
II.5MappingofQ.931causestoV.25biscallfailure
indicationsandresponses
II.6Additionalinformationforhandlingofexception
situations
II.6.1Callcollision
II.6.2Nochannelavailable
II.6.3Prematurecallclearing

Abstract

Defines terminal adaptor (TA) functions for the connection of terminals having interfaces conforming to current V-series Recommendations to the ISDN for both circuit switched and leased circuit services.

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