CCITTF.104(10-1991)(英)Internationalleasedcircuitservices-Customer…….pdf

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1、INTERNATIONALTELECOMMUNICATIONUNIONCCITTF.104THEINTERNATIONALTELEGRAPHANDTELEPHONECONSULTATIVECOMMITTEETELEGRAPHANDMOBILESERVICESOPERATIONSANDQUALITYOFSERVICEINTERNATIONALLEASEDCIRCUITSERVICES–CUSTOMERCIRCUITDESIGNATIONSRecommendationF.104Geneva,1991FOREWORDTheCCITT(theInternationalTelegraphan

2、dTelephoneConsultativeCommittee)isapermanentorganoftheInternationalTelecommunicationUnion(ITU).CCITTisresponsibleforstudyingtechnical,operatingandtariffquestionsandissuingRecommendationsonthemwithaviewtostandardizingtelecommunicationsonaworldwidebasis.ThePlenaryAssemblyofCCITTwhichmeetseveryfo

3、uryears,establishesthetopicsforstudyandapprovesRecommendationspreparedbyitsStudyGroups.TheapprovalofRecommendationsbythemembersofCCITTbetweenPlenaryAssembliesiscoveredbytheprocedurelaiddowninCCITTResolutionNo.2(Melbourne,1988).RecommendationF.104waspreparedbyStudyGroupIandwasapprovedundertheRe

4、solutionNo.2procedureonthe11thofOctober1991.___________________CCITTNOTEInthisRecommendation,theexpression“Administration”isusedforconcisenesstoindicatebothatelecommunicationAdministrationandarecognizedprivateoperatingagency.ãITU1991Allrightsreserved.Nopartofthispublicationmaybereproducedoruti

5、lizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromtheITU.RecommendationF.104RecommendationF.104INTERNATIONALLEASEDCIRCUITSERVICES–CUSTOMERCIRCUITDESIGNATIONS1Introduction1.1CCITTRecommendationM.140(Designationsofinternationalcircu

6、its,groups,groupandlinelinks,digitalblocks,digitalpaths,datatransmissionsystemsandrelatedinformation)specifiesaschemeforthedesignationofinternationalroutes1).1.2Thedesignationschemeisbasedonalayeredapproachwith:layer1–auniqueidentificationprovidinglimitedinformation;layer2–additionalinformatio

7、nthatmustbeknownatbothterminationoftheroute;andlayer3–(optional)–bilateralinformationnotthesubjectofinternationalstandardization.2General2.1Layer1oftheRecommendationM.140designationschemeprovidesuniquecircuitinformationthatiscommonatbot