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【英文标准名称】:Multicoreandsymmetricalpair/quadcablesfordigitalcommunications-Part5:Symmetricalpair/quadcableswithtransmissioncharacteristicsupto600MHz;Horizontalfloorwiring;Sectionalspecification
【原文标准名称】:数字通信用对绞/星绞多芯和对称电缆.第5部分:不高于600MHz的有传输特性的对绞/星绞对称电缆.水平地板布线.分规范
【标准号】:IEC61156-5-2002
【标准状态】:作废
【国别】:国际
【发布日期】:2002-03
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC46C
【标准类型】:()
【标准水平】:()
【中文主题词】:电气工程;数字的;传输特性;定义;多线的;对绞线;绞合的;空白格式;水平地板布线;特性;楼板;通信电缆;电性质和电现象;室内;电缆;多芯电缆;数据网络;综合业务数字网;规范;环境条件;设计;吊索;数据传送;直上干管;数字信号;局部地区网络;分规范;尺寸;对称的;电信;布线
【英文主题词】:Blankforms;Cables;Communicationcables;Datanetwork;Datatransfer;Definition;Definitions;Design;Digital;Digitalsignals;Dimensions;Electricalengineering;Electricalpropertiesandphenomena;Environmentalcondition;Floors;Horizontalfloorwiring;Indoors;ISDN;LAN;Multicorecables;Multi-wire;Pairsofwires;Properties;Risercables;Risingmains;Sectionalspecification;Specification;Stranded;Symmetrical;Telecommunication;Transmissioncharacteristics;Wiring
【摘要】:ThissectionalspecificationrelatestoIEC61156-1:Multicoreandsymmetricalpair/quadcablesfordigitalcommunications-Part1:Genericspecification.ThecablesdescribedhereinarespecificallyintendedforhorizontalfloorwiringinclassD,EandFchannels,asdefinedinISO/IEC11801:2000,Informationtechnology-Genericcablingforcustomerpremises(seeTable1).Itcoversindividuallyscreened(STP),commonscreened(FTP)andunscreened(UTP)pairsorquadshavingapaircountoffourpairsorless.Thetransmissioncharacteristicsofthecablesarespecifiedat20℃.SeeAnnexAforadiscussionofcableperformanceattemperatureshigherthan20℃.Thedesignation"Category5e"isusedhereintodescribeanenhancedCategory5cableandisusedinthesamecontextas"Category5"inISO/IEC11801.ThisenhancedcableisdesignatedCategory5etodifferentiateitfromtheCategory5cablesdescribedinIEC61156-2,61156-3,and61156-4.AlthoughbothCategory5and5ecablesarecharacterizedto100MHzandcanbeusedinClassDchannels,Category5ehasadditionalrequirements,ascomparedtoCategory5,whichmakeitpreferredforuseinsystemsutilizingfourpairstransmittingsimultaneouslyinbothdirections.Thesecablescanbeusedforvariouscommunicationsystemsthatareunderdevelopmentandwhichuseasmanyasfourpairssimultaneously.Inthissense,thissectionalspecificationprovidesthecablecharacteristicsrequiredbysystemdeveloperstoevaluatenewsystems.Thecablescoveredbythissectionalspecificationareintendedtooperatewithvoltagesandcurrentsnormallyencounteredincommunicationsystems.Thesecablesarenotintendedtobeusedinconjunctionwithlowimpedancesources,forexample,theelectricpowersuppliesofpublicutilitymains.Thoughtherecommendedtemperaturerangeduringinstallationis0℃+50℃,theactualtemperaturerangeduringinstallationshouldbeindicatedinthedetailspecification.
【中国标准分类号】:K13
【国际标准分类号】:33_120_20
【页数】:29P;A4
【正文语种】:英语


【英文标准名称】:Informationtechnology;Telecommunicationsandinformationexchangebetweensystems;operationofanX.25interworkingunit
【原文标准名称】:信息技术系统间远程通信和信息交换X.25互工作单元的操作
【标准号】:ISO/IECTR10029-1989
【标准状态】:现行
【国别】:国际
【发布日期】:1989-03
【实施或试行日期】:1989-03-15
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/IECJTC1
【标准类型】:()
【标准水平】:()
【中文主题词】:电信;信息交换;计算机外部设备;输入输出组件;信息交流;数据处理
【英文主题词】:Computerperipheralequipment;Dataprocessing;Informationexchange;Informationinterchange;Telecommunication;Telecommunications
【摘要】:DescribesthefunctionoftheInterworkingunit(IWU)intermsofthemappingbetweenProtokolDataUnits(PDUs)thatitreceivesfromoneinterface,andPDUsthatitthentransmitswhichcouldbeoneitherinterfaceoftheIWU.AlsodescribesproceduresanIWUcaninitiateoneachinterfaceindependently.EachinterfacecorrespondstooneinstanceofaDTE/DXEconnection,andbothinterfacesoftheInterworkingUnitoperateasaDTEasspecifiedbyISO8208.References:ISO8208;8880-2;8881.
【中国标准分类号】:L76
【国际标准分类号】:33_040_40;35_110
【页数】:5P.;A4
【正文语种】:英语