ITU-T F.64(11-1988) (英) Determination of the number of……

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1、INTERNATIONALTELECOMMUNICATIONUNION)45 4&TELECOMMUNICATIONSTANDARDIZATIONSECTOROFITU/0%2!4)/.3!.$15!,)49/&3%26)#%4%,%'2!0(3%26)#%3$%4%2-).!4)/./&4(%.5-"%2/&).4%2.!4)/.!,4%,%8#)2#5)432%15)2%$4/#!229!')6%.6/,5-%/&42!&&)#)

2、45 4Recommendation&(Extractfromthe"LUE"OOK)NOTES1ITU-TRecommendationF.64waspublishedinFascicleII.4oftheBlueBook.ThisfileisanextractfromtheBlueBook.WhilethepresentationandlayoutofthetextmightbeslightlydifferentfromtheBlueBookversion,thecontentsofthe

3、fileareidenticaltotheBlueBookversionandcopyrightconditionsremainunchanged(seebelow).2InthisRecommendation,theexpression“Administration”isusedforconcisenesstoindicatebothatelecommunicationadministrationandarecognizedoperatingagency.ãITU1988,1993Allrightsres

4、erved.Nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromtheITU.RecommendationF.64FascicleII.4-Rec.F.64DETERMINATIONOFTHENUMBEROFINTERNATIONALTELEXCIR

5、CUITSREQUIREDTOCARRYAGIVENVOLUMEOFTRAFFICTheCCITT,considering(a)thatitisessentialtoprovideanadequatenumberofcircuitsbetweentwotelexnetworksinordertoprovidetherapidservicestipulatedinRecommendationF.60;(b)thattheuseoftablesforthedeterminationofthenumberofci

6、rcuitsasafunctionofthetraffictobedealtwithduringthebusyhourisanestablishedpracticeinallAdministrations,andisaconvenientmeansofindicatingastandard;(c)thatinternationaltelexcircuitsmaybeselectedeitheratmanualpositions,orviaautomaticswitchingequipment,particu

7、larlywheresubscriber-to-subscriberselectionisemployedbetweentwonetworks;unanimouslydeclares(1)thatAdministrationsshoulduseTables1/F.64or2/F.64below,accordingtothesystemofselectionemployed(i.e.manualselectionorautomaticselection)intheinternationalservice;(2

8、)AdministrationsshouldaimforfullavailabilityofcircuitsonintercontinentalandARQradioroutesoperatedwithsignallinginaccordancewithRecommendationsU.1,U.11,U.12andU.20.WhereanAdministrationisunabletoprovidethefull