ITU-TL.30(112007)(英)Markersonmarinizedterrestrialcables.pdf

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1、InternationalTelecommunicationUnionITU-TL.30TELECOMMUNICATION(11/2007)STANDARDIZATIONSECTOROFITUSERIESL:CONSTRUCTION,INSTALLATIONANDPROTECTIONOFCABLESANDOTHERELEMENTSOFOUTSIDEPLANTMarkersonmarinizedterrestrialcablesITU-TRecommendationL.30ITU-TRecommenda

2、tionL.30MarkersonmarinizedterrestrialcablesSummaryITU-TRecommendationL.30describesthetypesofmarkersthatcanbeappliedonmarinizedterrestrialcables(MTC)andrelatedlandcables(consideredaspartofMTC).Moreover,markersalsowarnofapproachingjoints,transitionsand/or

3、anyrelevantvariationonthecablethatcanbeusefulforfutureinspections,cableprotectionand/orrepairing.Boththematerialsandcoloursusedformarkersandtheirapplicationpoints,aredescribed.SourceITU-TRecommendationL.30wasapprovedon6November2007byITU-TStudyGroup6(200

4、5-2008)undertheITU-TRecommendationA.8procedure.ITU-TRec.L.30(11/2007)iFOREWORDTheInternationalTelecommunicationUnion(ITU)istheUnitedNationsspecializedagencyinthefieldoftelecommunications,informationandcommunicationtechnologies(ICTs).TheITUTelecommunicat

5、ionStandardizationSector(ITU-T)isapermanentorganofITU.ITU-Tisresponsibleforstudyingtechnical,operatingandtariffquestionsandissuingRecommendationsonthemwithaviewtostandardizingtelecommunicationsonaworldwidebasis.TheWorldTelecommunicationStandardizationAs

6、sembly(WTSA),whichmeetseveryfouryears,establishesthetopicsforstudybytheITU-Tstudygroupswhich,inturn,produceRecommendationsonthesetopics.TheapprovalofITU-TRecommendationsiscoveredbytheprocedurelaiddowninWTSAResolution1.Insomeareasofinformationtechnologyw

7、hichfallwithinITU-T'spurview,thenecessarystandardsarepreparedonacollaborativebasiswithISOandIEC.NOTEInthisRecommendation,theexpression"Administration"isusedforconcisenesstoindicatebothatelecommunicationadministrationandarecognizedoperatingagency.Complia

8、ncewiththisRecommendationisvoluntary.However,theRecommendationmaycontaincertainmandatoryprovisions(toensuree.g.interoperabilityorapplicability)andcompliancewiththeRecommendationisachievedwhenallofthesemandatoryprovisionsaremet.Th