Table of Contents
1Scope
2References
3Termsanddefinitions
4Abbreviations
5Convention
6Descriptionofservices
6.1General
6.2Serviceparameters
7Architectureoftheprotocol
7.1Serviceprovidedbytheunderlyinglayer
7.2LinkFlowControl
7.3Linkset-up
7.4Linkacknowledgement
7.5Multiplexing
7.6VCsequenceandretransmissioncontrol
7.7VC-flowcontrol
7.8VCsegmentationandreassembly
7.9VCsignalling
8DescriptionoftheDTE/DCEinterface(physicallayer)
9Codingofframesandpackets
9.1General
9.2Descriptionofframes
9.3Descriptionofpackets
9.4Meaningoftheframeandpacketfields
9.5CodingoftheTypefield
10LinkandVC-levelprocedures
10.1Identificationofthelinkconnection
10.2Genericstatusrequestprocedure
10.3Futureupgradeswithupwardcompatibility
10.4Segmentdefinition
10.5Flowcontrolatthelinklayer
10.6Linkset-upanddisconnection
10.7Procedureforpositiveandnegativeacknowledgements
ofPDU
10.8Errorcorrection
10.9Multiplexing/demultiplexing
10.10NumberingofpacketsattheVClayer
10.11Re-orderingofdatapackets
10.12FlowcontrolattheVClayer
10.13Datatransfer
10.14Interruptprocedure
10.15Resetofavirtualcircuit
11Signallingcoding
11.1Messagefunctionaldefinitionsandcontents
11.2Generalmessageformatandinformationelements
coding
11.3Addressing
11.4Handlingofcodingerrors
12Proceduresforpermanentvirtualcircuitservice
13Signallingproceduresforswitchedvirtualcircuits
13.1Set-upandclearingprocedures
13.2Procedureforrestart
13.3Effectsofclearingandrestartprocedureson
transferofpackets
14Proceduresforuserfacilities
14.1Incomingcallsbarred
14.2Outgoingcallsbarred
14.3Packetsizenegotiationfacility
14.4Assured/non-assureddatatransfernegotiation
facility
14.5Throughputnegotiationfacilities
14.6Closedusergrouprelatedfacilities
14.7Fastselect
14.8Reversecharging
14.9Reversechargingacceptance
14.10Localchargingprevention
14.11NetworkUserIdentification(NUI)relatedfacilities
14.12Transitnetworkselectionrelatedfacilities
14.13Huntgroup
14.14Callredirectionandcalldeflectionrelated
facilities
14.15Calledlineaddressmodifiednotification
14.16Transitdelayselectionandindication
14.17Alternativeaddressingfacilities
AnnexAAdditionalinformationforinterworkingbetween
X.25andX.45protocols
A.1Throughputmapping
A.2Datatransferoption
A.3Signallingcodingmapping
AppendixI-Subscriptionparametersperinterface
I.1Subscriptionparametersperinterface
I.2SubscriptionparametersperPVC Abstract
Defines methods for use in support of X.25 compatible services at higher access speeds than Rec. X.25 itself. In addition, so as to add a new flexibility regarding the trade-off between error correction and variations of propagation delay, a non-assured data transfer option is included.
