ITU-T F.851 (02 1995) (英) Universal Personal……

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1、INTERNATIONALTELECOMMUNICATIONUNION)45 4&TELECOMMUNICATION(02/95)STANDARDIZATIONSECTOROFITU/0%2!4)/.3!.$15!,)49/&3%26)#%5.)6%23!,0%23/.!,4%,%#/--5.)#!4)/.5.)6%23!,0%23/.!,4%,%#/--5.)#! 4)/.5043%26)#%$%3#2)04)/.3%26)#%3%4)45 4Recommendati

2、on&(Previously“CCITTRecommendation”)FOREWORDTheITU-T(TelecommunicationStandardizationSector)isapermanentorganoftheInternationalTelecommunicationUnion(ITU).TheITU-Tisresponsibleforstudyingtechnical,operatingandtariffquestionsandissuingRecommen-dationsonthemwithaviewtos

3、tandardizingtelecommunicationsonaworldwidebasis.TheWorldTelecommunicationStandardizationConference(WTSC),whichmeetseveryfouryears,establishesthetopicsforstudybytheITU-TStudyGroupswhich,intheirturn,produceRecommendationsonthesetopics.TheapprovalofRecommendationsbytheMemberso

4、ftheITU-TiscoveredbytheprocedurelaiddowninWTSCResolutionNo.1(Helsinki,March1-12,1993).ITU-TRecommendationF.851waspreparedbyITU-TStudyGroup1(1993-1996)andwasapprovedundertheWTSCResolutionNo.1procedureonthe21stofFebruary1995.___________________NOTEInthisRecommendation,theexpr

5、ession“Administration”isusedforconcisenesstoindicatebothatelecommunicationadministrationandarecognizedoperatingagency.ãITU1995Allrightsreserved.Nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,wit

6、houtpermissioninwritingfromtheITU.CONTENTSRecommendationF.851(02/95)Page1General...........................................................................................................................................................11.1Scope..............................

7、..................................................................................................................11.2Generaldescription...........................................................................................................................11.3Definitions

8、andterminology....................................................................