ITU-T I.231.10 (08 1992) (英) Circuit-mode bearer service categories……

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1、INTERNATIONALTELECOMMUNICATIONUNIONCCITTI.231.10THEINTERNATIONAL(08/92)TELEGRAPHANDTELEPHONECONSULTATIVECOMMITTEEINTEGRATEDSERVICESDIGITALNETWORK(ISDN)GENERALSTRUCTUREANDSERVICECAPABILITIESCIRCUIT-MODEMULTIPLE-RATEUNRESTRICTED8kHzSTRUCTUREDBEARERSERVICECATEGORYRecomm

2、endationI.231.10Geneva,1992FOREWORDTheCCITT(theInternationalTelegraphandTelephoneConsultativeCommittee)isapermanentorganoftheInternationalTelecommunicationUnion(ITU).CCITTisresponsibleforstudyingtechnical,operatingandtariffquestionsandissuingRecommendationsonthemwith

3、aviewtostandardizingtelecommunicationsonaworldwidebasis.ThePlenaryAssemblyofCCITTwhichmeetseveryfouryears,establishesthetopicsforstudyandapprovesRecommendationspreparedbyitsStudyGroups.TheapprovalofRecommendationsbythemembersofCCITTbetweenPlenaryAssembliesiscoveredby

4、theprocedurelaiddowninCCITTResolutionNo.2(Melbourne,1988).RecommendationI.231.10waspreparedbyStudyGroupIandwasapprovedundertheResolutionNo.2procedureonthe4thofAugust1992.___________________CCITTNOTEInthisRecommendation,theexpression“Administration”isusedforconcisenes

5、stoindicatebothatelecommunicationAdministrationandarecognizedprivateoperatingagency.©ITU1992Allrightsreserved.Nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfrom

6、theITU.RecommendationI.231.10RecommendationI.231.10(08/92)CIRCUIT-MODEMULTIPLE-RATEUNRESTRICTED8kHzSTRUCTUREDBEARERSERVICECATEGORY(1992)1DefinitionoftheserviceThemultiple-ratecircuit-modebearerserviceforanISDNinterfaceallowsuserstorequestfromtheISDNonademandbasisthee

7、stablishmentandreleaseofcircuit-modeconnectionssupportingunrestrictedinformationtransferratesatintegermultiplesof64kbit/suptothemaximumrateoftheinterface.Themultiple-ratecircuit-modebearerserviceinasenseextendsthecircuit-modebearerservicebasedon64kbit/sbysupportinghi

8、gherinformationtransferrates.2Description2.1GeneraldescriptionThiscircuit-modebearerservicecategoryallows:–twousers[e.g.terminals,p