ITU-T E.450(03 1998) (英)Facsimile quality of service on public networks ……

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1、INTERNATIONALTELECOMMUNICATIONUNIONITU-TE.450TELECOMMUNICATION(03/98)STANDARDIZATIONSECTOROFITUSERIESE:OVERALLNETWORKOPERATION,TELEPHONESERVICE,SERVICEOPERATIONANDHUMANFACTORSQualityofservice,networkmanagementandtrafficengineering–Networkmanagement–Checkingthequalityoftheintern

2、ationaltelephoneserviceFacsimilequalityofserviceonpublicnetworks–GeneralaspectsITU-TRecommendationE.450(PreviouslyCCITTRecommendation)ITU-TE-SERIESRECOMMENDATIONSOVERALLNETWORKOPERATION,TELEPHONESERVICE,SERVICEOPERATIONANDHUMANFACTORSOPERATION,NUMBERING,ROUTINGANDMOBILESERVICES

3、INTERNATIONALOPERATIONOPERATIONALPROVISIONSRELATINGTOCHARGINGANDACCOUNTINGINTHEINTERNATIONALTELEPHONESERVICEUTILIZATIONOFTHEINTERNATIONALTELEPHONENETWORKFORNON-TELEPHONYAPPLICATIONSISDNPROVISIONSCONCERNINGUSERSE.330–E.399QUALITYOFSERVICE,NETWORKMANAGEMENTANDTRAFFICENGINEERINGNE

4、TWORKMANAGEMENTInternationalservicestatisticsE.400–E.409InternationalnetworkmanagementE.410–E.419CheckingthequalityoftheinternationaltelephoneserviceE.420–E.489TRAFFICENGINEERINGMeasurementandrecordingoftrafficE.490–E.505ForecastingoftrafficE.506–E.509Determinationofthenumberof

5、circuitsinmanualoperationE.510–E.519Determinationofthenumberofcircuitsinautomaticandsemi-automaticoperationE.520–E.539GradeofserviceE.540–E.599DefinitionsE.600–E.699ISDNtrafficengineeringE.700–E.749MobilenetworktrafficengineeringE.750–E.799QUALITYOFTELECOMMUNICATIONSERVICES:CON

6、CEPTS,MODELS,OBJECTIVESANDDEPENDABILITYPLANNINGForfurtherdetails,pleaserefertoITU-TListofRecommendations.ITU-TRECOMMENDATIONE.450FACSIMILEQUALITYOFSERVICEONPUBLICNETWORKS–GENERALASPECTSSummaryFacsimileisthemostimportantnon-voiceapplicationoninternationalPSTNandthemostwidelyused

7、standardisgroup3facsimile.ThisRecommendationisaimedatformingaframeworkforRecommendationsonfacsimilequalityofserviceonPSTN.AroadmapoftheE.450-seriesRecommendationsisshowninFigure1.SourceITU-TRecommendationE.450wasrevisedbyITU-TStudyGroup2(1997-2000)andwasapprovedundertheWTSCReso

8、lutionNo.1procedureonthe9thofMarch1998.RecommendationE