ITU-T E.421(11 1988) (英)Service quality observations on a statistical basis

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1、INTERNATIONALTELECOMMUNICATIONUNION)45 4%TELECOMMUNICATIONSTANDARDIZATIONSECTOROFITU4%,%0(/.%.%47/2+!.$)3$.15!,)49/&3%26)#%.%47/2+-!.!'%-%.4!.$42!&&)#%.').%%2).'3%26)#%15!,)49/"3%26!4)/.3/.!34!4)34)#!,"!3)3)45 4Recommendation%(Extractfromthe"LUE"OO

2、K)NOTES1ITU-TRecommendationE.421waspublishedinFascicleII.3oftheBlueBook.ThisfileisanextractfromtheBlueBook.WhilethepresentationandlayoutofthetextmightbeslightlydifferentfromtheBlueBookversion,thecontentsofthefileareidenticaltotheBlueBookversionandcopyrightconditionsremainunchanged(seebelow

3、).2InthisRecommendation,theexpression“Administration”isusedforconcisenesstoindicatebothatelecommunicationadministrationandarecognizedoperatingagency.ãITU1988,1993Allrightsreserved.Nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocop

4、yingandmicrofilm,withoutpermissioninwritingfromtheITU.RecommendationE.421FascicleII.3-Rec.E.421SERVICEQUALITYOBSERVATIONSONASTATISTICALBASIS1Definitions1.1serviceobservationF:observationdelaqualitédeserviceS:observacióndelacalidaddelservicioMonitoringtoobtainacompleteorpartialassessmentoft

5、hequalityoftelephonecalls,excludingtestcalls.1.2manualobservationF:observationmanuelleS:observaciónmanualMonitoringoftelephonecallsbyanobserverwithoutusinganyautomaticdata-recordingmachine.1.3automaticobservationF:observationautomatiqueS:observaciónautomáticaMonitoringoftelephonecallswitho

6、utanobserver.1.4semi-automaticobservationF:observationsemi-automatiqueS:observaciónsemiautomáticaMonitoringoftelephonecallsusingequipmentwhichrecordssomedataautomatically.Forexample,equipmentinwhichinformation,suchasexchangebeingobserved,numberdialledbythesubscriber,meteringpulsesandtimeof

7、call,isrecordedautomaticallyonsomemeanssuitablefordataprocessing.Theobservermerelyhastokeyinacodeindicatingtheconditionobserved.2Relativemeritsofmanual,automaticandsemi-automaticobservations2.1Thethreemethodsmentionedabovein§§1.2,1.3and1.4arenotexclusive;forex