ITU-T X.1 (03 2000) International user classes of service in, and

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1、INTERNATIONALTELECOMMUNICATIONUNIONX.1TELECOMMUNICATION(03/00)STANDARDIZATIONSECTOROFITUSERIESX:DATANETWORKSANDOPENSYSTEMCOMMUNICATIONSPublicdatanetworks–ServicesandfacilitiesInternationaluserclassesofservicein,andcategoriesofaccessto,publicdatanetworksandintegratedservicesdigitaln

2、etworks(ISDNs)ITU-TRecommendationX.1(PreviouslyCCITTRecommendation)ITU-TX-SERIESRECOMMENDATIONSDATANETWORKSANDOPENSYSTEMCOMMUNICATIONSPUBLICDATANETWORKSServicesandfacilitiesX.1–X.19InterfacesX.20–X.49Transmission,signallingandswitchingX.50–X.89NetworkaspectsX.90–X.149MaintenanceX.1

3、50–X.179AdministrativearrangementsX.180–X.199OPENSYSTEMSINTERCONNECTIONModelandnotationX.200–X.209ServicedefinitionsX.210–X.219Connection-modeprotocolspecificationsX.220–X.229Connectionless-modeprotocolspecificationsX.230–X.239PICSproformasX.240–X.259ProtocolIdentificationX.260–X.2

4、69SecurityProtocolsX.270–X.279LayerManagedObjectsX.280–X.289ConformancetestingX.290–X.299INTERWORKINGBETWEENNETWORKSGeneralX.300–X.349SatellitedatatransmissionsystemsX.350–X.399MESSAGEHANDLINGSYSTEMSX.400–X.499DIRECTORYX.500–X.599OSINETWORKINGANDSYSTEMASPECTSNetworkingX.600–X.629Ef

5、ficiencyX.630–X.639QualityofserviceX.640–X.649Naming,AddressingandRegistrationX.650–X.679AbstractSyntaxNotationOne(ASN.1)X.680–X.699OSIMANAGEMENTSystemsManagementframeworkandarchitectureX.700–X.709ManagementCommunicationServiceandProtocolX.710–X.719StructureofManagementInformationX

6、.720–X.729ManagementfunctionsandODMAfunctionsX.730–X.799SECURITYX.800–X.849OSIAPPLICATIONSCommitment,ConcurrencyandRecoveryX.850–X.859TransactionprocessingX.860–X.879RemoteoperationsX.880–X.899OPENDISTRIBUTEDPROCESSINGX.900–X.999Forfurtherdetails,pleaserefertoITU-TListofRecommendat

7、ions.ITU-TRECOMMENDATIONX.1INTERNATIONALUSERCLASSESOFSERVICEIN,ANDCATEGORIESOFACCESSTO,PUBLICDATANETWORKSANDINTEGRATEDSERVICESDIGITALNETWORKS(ISDNs)SummaryThisRecommendationdescribesinternationaluserclassesofservicein,categoriesofaccessto,publicdatanetworksandIntegratedServicesDigi

8、talNetworks(ISDN).Detailsf