【英文标准名称】:Informationtechnology-Telecommunicationsandinformationexchangebetweensystems-Localandmetropolitanareanetworks-Specificrequirements-Part5:Tokenringaccessmethodandphysicallayerspecifications
【原文标准名称】:信息技术系统间远程通信和信息交换局域网和城域网特殊要求第5部分:令牌环访问方法和物理层规范
【标准号】:ISO/IEC8802-5-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-09
【实施或试行日期】:
【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】:网络互连;局域网;信息技术;人类;局部地区网络;电信;媒体通路控制;城域网;定义;标志环;信息交换;物理层;数据处理;多路存取计算机
【英文主题词】:Dataprocessing;Definition;Definitions;Informationinterchange;Informationtechnology;LAN;Localareanetworks;MAC;MAN;Mediumaccesscontrol;Metropolitanareanetworks;Networkinterconnection;Physicallayers;Telecommunications;Tokenring
【摘要】:Forthepurposeofcompatibleinterconnectionofdataprocessingequipmentviaalocalareanetwork(LAN)usingthetokenringaccessmethod,thispartofISO/IEC8802a)Providesageneraldescriptionofthetokenringlocalareanetwork(LAN)architecture(clause2);b)Definestheframeformat,includingthedelimiters,addressfields,informationfield,andframe-checksequence(FCS).DefinestheMediumAccessControl(MAC)frames,timers,anderrorcounters(clause3);c)DefinestheMACprotocolsincludingfinitestatemachinesandstatetables(clause4);d)DefinesthesystemlevelPhysicallayer(PHY)signalingspecificationsthatarespecifictoaringstation(clause5);e)Definesthemanagedobjectsnecessarytomanagetheserviceandprotocolelementsthatarein-volvedinthemanagementofatokenringstation(clause6);f)DefinesthePHYstationattachmentspecificationfor4and16Mbit/soperation.Thisincludesthetransmitter,receiver,mediuminterfaceconnector,andtransmissionchannelforbothshieldedtwistedpair(STP)andunshieldedtwistedpair(UTP)media(clause7);g)Definestheconcentrator,incorporatingmultipletrunkcouplingunits(TCUs),fortheattachmentofagroupofstationstothering(clause8);h)Includestheprotocolimplementationconformancestatement(PICS)proformaincompliancewiththerelevantrequirements,andinaccordancewiththerelevantguidance,giveninISO/IEC9646-2:1994(annexA);i)Includeschanneldesignexamplesandformulasforcalculatingcablingandconcentratorsystemconfigurations(annexB);j)Describesjittercomponentsandprovidesanexampleofjitterbuildupusingaphaselocklooprecoverycircuit(annexC);k)Providesinformativetransmitterfilterdesignexample(annexD);1)Providesrecommendedguidelinesforsafetyandoperatingenvironments(annexE);m)IllustratestheMACfinitestatemachinesinanotationsimilartothatusedinISO/IEC8802-5:1992(annexF);n)Describesmajorimprovementsmadeafterthefirsteditionofthestandard(annexG);o)ProvidesasamplealgorithmfortheparsingofMACframes(annexH);p)Providesrecommendationsfortheuseoftokenringaccessprioritiestosupportmultimediatraffic(annexI);q)Providesbiterrorrate(BER)criteriaforlobemediatesting(annexP).Aparticularemphasisofthisstandardistospecifytheexternallyvisiblecharacteristicsneededforinterconnectioncompatibility,whileavoidingunnecessaryconstraintsuponandchangestointernaldesignandimplementationoftheheterogeneousprocessingequipmenttobeinterconnected.TheapplicationsenvironmentfortheLANisintendedtobecommercialandlightindustrial.TheuseoftokenringLANsinhomeandheavyindustrialenvironments,whilenotprecluded,hasnotbeenconsideredinthedevelopmentofthisstandard.Thisstandard,theThirdEditionofthispartofISO/IEC8802,providesenhancementsandcorrectionstotheSecondEdition.TheSecondEditionprovidedgreaterspecificityandimprovedclaritytotheFirstEdition(1992-06-12)toensureinteroperabilityofthevariouscomponentsinthetokenringnetwork.Theintentofthiseditionistomaintaininteroperabilitywithstationsdesignedtothisspecificationandstationsdesignedtoprioreditionsofthestandard.However,interoperabilitywithpriorimplementations(particularlyinregardtoclause7)cannotbeguaranteedduetononspecificitywithinthe1992edition.AnnexGliststhespecificdifferencesbetweenthesecondeditionandthefirstedition.Thefollowingitemsaresubjectsforfuturestudy:a)Controlledbitalteringbyanydeviceexceptastation.b)Methodologytoassurehandlingofjoiningofmultipleringsasmaybeusedbymanagedconcen-tratorstoassurenormalinsertionprocessprotectionmechanisms(suchasduplicateaddresstestorringparameterservernotification).c)Ri
【中国标准分类号】:L78
【国际标准分类号】:35_100_10;35_110
【页数】:243P;A4
【正文语种】:英语
基本信息
| 标准名称： | 电子式织物强力机校准规范 |
| 英文名称： | Calibration Specification for Electronic Fabric Strength Machines |
| 发布部门： | 中国纺织工业协会 |
| 发布日期： | 2010-12-21 |
| 实施日期： | 2011-04-01 |
| 首发日期： | |
| 作废日期： | |
| 主管部门： | 纺织计量技术委员会 |
| 归口单位： | 纺织计量技术委员会 |
| 起草单位： | 济南纺织科学研究院、国家纺织计量站等 |
| 起草人： | 张森、宋湛华、陈郁立等 |
| 出版社： | 中国质检出版社 |
| 出版日期： | 2011-04-01 |
| 页数： | 28页 |
适用范围
本规范规定了电子式织物强力机（仪）（CRE型）的校准和检验方法，适用于新制造、使用中和修理后的对纺织品和非金属材料进行拉伸、压缩、撕裂和剥离等力学性能试验用的强力机的校准。其他结构相同或类似的电子式拉力和压力试验机的校准可参照本规范执行。
前言
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引用标准
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所属分类： 综合 计量 电磁计量 计量学和测量 物理现象 电学 磁学 电和磁的测量