GB 4822.3-1984 锯材检验 等级评定
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来源:标准资料网
基本信息
| 标准名称： | 锯材检验 等级评定 |
| 中标分类： |
农业、林业 >>
林业 >>
木材加工材 |
| 替代情况： | 被GB/T 4822-1999代替 |
| 发布日期： | 1900-01-01 |
| 实施日期： | 1985-12-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 2页 |
适用范围
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前言
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引用标准
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所属分类： 农业 林业 林业 木材加工材
【英文标准名称】:Informationprocessingsystems-FibreDistributedDataInterface(FDDI)-Stationmanagement(SMT)
【原文标准名称】:信息处理系统.光纤分布式数据接口(FDDI).站点管理(SMT)
【标准号】:BSISO/IEC9314-6-1998
【标准状态】:现行
【国别】:英国
【发布日期】:1998-12-15
【实施或试行日期】:1998-12-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:纤维光学;通信网;计算机网络;句法;光纤分布数据接口(FIBERDISTRIBUTEDDATAINTERFACE);数据传输;开放系统互连;协议;数据传输方法;纤维光缆;数据链路层;权标环网;物理层(开放系统互连);光纤;接口;信息交流;网络互连
【英文主题词】:Communicationprocedures;Controlprocedures;Datainterface;Dataprocessing;Datatransmission;Definition;Definitions;FDDI;Informationinterchange;Informationtechnology;Interfaces;Interfaces(dataprocessing);Networkinterconnection;Opticalfibres;Opticalwaveguides
【摘要】:ThispartofISO/IEC9314specifiestheStationManagement(SMT)fortheFibreDistributedDataInterface(FDDI).FDDIprovidesahighbandwidth(100megabitspersecond)generalpurposeinterconnectionamongcomputersandperipheralequipmentusingopticalfibreasthetransmissionmediuminaringconfiguration.FDDIcanbeconfiguredtosupportasustainedtransferrateofapproximately80megabits(10megabytes)persecond.TheuseofdualattachmentstationswithdualMACsallowstheseratestobedoubledunderthecircumstanceofafault-freeFDDIring.FDDIestablishestheconnectionamongmanystations(nodes)distributedoverdistancesofseveralkilometresinextent.DefaultvaluesforFDDIwerecalculatedonthebasisof1000physicalconnectionsandatotalfibrepathlengthof200km.TheFDDIconsistsofa)APhysicalLayer(PL),whichprovidesthemedium,connectors,opticalbypassing,anddriver/receiverrequirements.PLalsodefinesencode/decodeandclockrequirementsasrequiredforframingthedatafortransmissiononthemediumortothehigherlayersoftheFDDI.ForthepurposesofthispartofISO/IEC9314,referencestothePLaremadeintermsofthePhysicalLayerprotocol(PHY)andthePhysicalLayerMediaDependent(PMD)entitieswhicharetheupperandlowersublayersofPL,respectively.b)ADataLinkLayer(DLL)whichcontrolstheaccessingofthemediumandthegenerationandverificationofframechecksequencestoassuretheproperdeliveryofvaliddatatothehigherlayers.DLLalsoconcernsitselfwiththegenerationandrecognitionofdeviceaddressesandthepeer-to-peerassociationswithintheFDDInetwork.ForthepurposesofthispartofISO/IEC9314,referencestotheDLLaremadeintermsoftheMediaAccessControl(MAC)entitywhichisthelowestsublayerofDLL.c)AStationManagement(SMT)standard,thispartofISO/IEC9314,whichprovidesthecontrolnecessaryatthestation(node)leveltomanagetheprocessesunderwayinthevariousFDDIlayerssuchthatastationmayworkcooperativelyasapartofanFDDInetwork.SMTshallprovideservicessuchasconnectionmanagement,stationinsertionandremoval,stationinitialization,configurationmanagement,faultisolationandrecovery,communicationsprotocolforexternalauthority,schedulingpolicies,andcollectionofstatistics.ThedefinitionofSMTascontainedhereinincludesthesetofservicesthatitprovidesfor,andreceivesfrom,theotherentitiesthatarecontainedwithinanode.WithinSMTresidesbothknowledgeoftheuniquenessofthisnodeandthecurrentnetworkstructuretotheextentthatthisnode'sfunctionisaffected.ThesetofInternationalStandardsforFDDI,ISO/IEC9314,specifiestheinterfaces,functionsandoperationsnecessarytoinsureinteroperabilitybetweenconformingFDDIimplementations.ThispartofISO/IEC9314isafunctionaldescription.Conformingimplementationsmayemployanydesigntechniquewhichdoesnotviolateinteroperability.
【中国标准分类号】:L65
【国际标准分类号】:33_180_01;35_110
【页数】:202P;A4
【正文语种】:英语
