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《ITU-T K.25 (02 2000) (英) Protection of optical fibre cables》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、INTERNATIONALTELECOMMUNICATIONUNIONITU-TK.25TELECOMMUNICATION(02/2000)STANDARDIZATIONSECTOROFITUSERIESK:PROTECTIONAGAINSTINTERFERENCEProtectionofopticalfibrecablesITU-TRecommendationK.25(FormerlyCCITTRecommendation)ITU-TRECOMMENDATIONK.25PROTECTIONOFOPTICALFIBRECABLESSummaryTh
2、isRecommendationprovidesaproceduretoprotectthetelecommunicationlinesusingfibreopticsagainstdirectlightningdischargestothelineitselfortothestructuresthatthelineenters.Theprotectionprocedureisrelatedtotheexposureofthelinetodirectlightningdischargesandincludestheselectionofcablec
3、haracteristics/installation,useofshieldwires,bonding/earthingofthecableshield,installationofsurgeprotectivedevices(SPD)androuteredundancy.SourceITU-TRecommendationK.25wasrevisedbyITU-TStudyGroup5(1997-2000)andwasapprovedundertheWTSCResolutionNo.1procedureon25February2000.Recom
4、mendationK.25(02/2000)iFOREWORDITU(InternationalTelecommunicationUnion)istheUnitedNationsSpecializedAgencyinthefieldoftelecommunications.TheITUTelecommunicationStandardizationSector(ITU-T)isapermanentorganoftheITU.TheITU-Tisresponsibleforstudyingtechnical,operatingandtariffque
5、stionsandissuingRecommendationsonthemwithaviewtostandardizingtelecommunicationsonaworldwidebasis.TheWorldTelecommunicationStandardizationConference(WTSC),whichmeetseveryfouryears,establishesthetopicsforstudybytheITU-TStudyGroupswhich,intheirturn,produceRecommendationsontheseto
6、pics.TheapprovalofRecommendationsbytheMembersoftheITU-TiscoveredbytheprocedurelaiddowninWTSCResolutionNo.1.InsomeareasofinformationtechnologywhichfallwithinITU-T’spurview,thenecessarystandardsarepreparedonacollaborativebasiswithISOandIEC.NOTEInthisRecommendation,theexpression"
7、Administration"isusedforconcisenesstoindicatebothatelecommunicationadministrationandarecognizedoperatingagency.INTELLECTUALPROPERTYRIGHTSTheITUdrawsattentiontothepossibilitythatthepracticeorimplementationofthisRecommendationmayinvolvetheuseofaclaimedIntellectualPropertyRight.T
8、heITUtakesnopositionconcerningtheevidence,validityorapplicabi
