ReferencenumberISO/IEC11572:2000(E)©ISO/IEC2000INTERNATIONALSTANDARDISO/IEC11572Thirdedition2000-03-15Informationtechnology—Telecommunicationsandinformationexchangebetweensystems—PrivateIntegratedServicesNetwork—Circuitmodebearerservices—Inter-exchangesignallingproceduresandprotocolTechnologiesdel'information—Télécommunicationsetéchanged'informationentresystèmes—Réseauprivéàintégrationdeservices—Servicesporteursenmodecircuit—Procéduresetprotocoledesignalisationd'interéchangeISO/IEC11572:2000(E)PDFdisclaimerThisPDFfilemaycontainembeddedtypefaces.InaccordancewithAdobe'slicensingpolicy,thisfilemaybeprintedorviewedbutshallnotbeeditedunlessthetypefaceswhichareembeddedarelicensedtoandinstalledonthecomputerperformingtheediting.Indownloadingthisfile,partiesacceptthereintheresponsibilityofnotinfringingAdobe'slicensingpolicy.TheISOCentralSecretariatacceptsnoliabilityinthisarea.AdobeisatrademarkofAdobeSystemsIncorporated.DetailsofthesoftwareproductsusedtocreatethisPDFfilecanbefoundintheGeneralInforelativetothefile;thePDF-creationparameterswereoptimizedforprinting.EverycarehasbeentakentoensurethatthefileissuitableforusebyISOmemberbodies.Intheunlikelyeventthataproblemrelatingtoitisfound,pleaseinformtheCentralSecretariatattheaddressgivenbelow.©ISO/IEC2000Allrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromeitherISOattheaddressbeloworISO'smemberbodyinthecountryoftherequester.ISOcopyrightofficeCasepostale56�CH-1211Geneva20Tel.+41227490111Fax+41227341079E-mailcopyright@iso.chWebwww.iso.chPrintedinSwitzerlandii©ISO/IEC2000–AllrightsreservedISO/IEC11572:2000(E)©ISO/IEC2000–AllrightsreservediiiContentsPageForewordviiIntroductionviii1Scope12Conformance13Normativereferences14Termsanddefinitions15Listofacronyms36Generalprinciples36.1Protocolmodel46.2ServicesprovidedtoCallControl46.3ServicesrequiredoftheSignallingCar...
