【英文标准名称】:ProceduresforachievementofinteroperabilityandsecuritybyuseofenciphermentatthephysicallayerofOSIintelecommunicationsystemsconveyingautomaticdataprocessinginformation
【原文标准名称】:在传送自动数据处理信息的电信系统中开放式系统互连的物理层使用密码以获得互操作性和安全性程序
【标准号】:BS7112-1991
【标准状态】:现行
【国别】:英国
【发布日期】:1991-05-31
【实施或试行日期】:1991-05-31
【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】:数据传送;信息交流;半双工传输;数据传输;开放系统互连;数据转换;编码(数据转换);代码转换;接口(数据加工);同步传输;代码表示;双工传输;数据处理;数据处理;起停式传输;物理层(开放系统互连)
【英文主题词】:Codedrepresentation;Coding;Communication;Communicationsystems;Dataconversion;Dataprocessing;Informationexchange;Informationinterchange;Informationprocessing;Opensystemsinterconnection;Physicallayers;Telecommunication;Telecommunications
【摘要】:ThisInternationalStandardappliestosystemsforenciphermentofADPinformationinthephysicallayerofdatacommunications.ThisInternationalStandardisequallyapplicablewhethertheDataEnciphermentEquipment(DEE)isimplementedasaphysicallyseparatepieceofequipmentorimplementedaspartoftheDataTerminalEquipment(DTE)oraspartoftheDataCircuitterminatingEquipment(DCE).WhentheenciphermentisintegratedintotheDTEorDCE,thisInternationalStandardappliestothoseportionsoftheDTEorDCEdesignwhichimplementtherequirementsofthisInternationalStandard.Interoperabilityrequirementsaredefinedforthefollowingphysicalinterfacedefinitions:V.24,X.20bis,X.21bis,X.20,andX.21.ThephysicallayerisdescribedintheOpenSystemsInterconnectionReferenceModel,ISO7498.Inphysicallayerencipherment,alloftheSDUisnormallyenciphered.TheinteroperabilityrequirementsdescribedinthisInternationalStandardapplytobothsynchronousandasynchronousoperationinbothfullduplexandhalfduplexmodes.ThemainbodyofthisInternationalStandardspecifiesrequirementswhichareapplicabletotheuseofvariousenciphermentalgorithms.AnnexBspecifiesadditionalrequirementsfortheuseofDEA(ANSIX3.92-1981).ThisInternationalStandardalsospecifiestwoalternativemodesofsynchronousoperation-thedelayedoptionandtheimmediateoption-whicharemutuallyincompatible.ThisInternationalStandardalsospecifiestwoalternativeactionsforBREAKsignallingforasynchronousoperation-ClassAandClassB-whicharemutuallyincompatibie.
【中国标准分类号】:L78
【国际标准分类号】:35_040
【页数】:24P;A4
【正文语种】:英语


【英文标准名称】:Raspsandcabinetfiles;types,lengths,crosssectionaldimensions
【原文标准名称】:粗锉和细锉.类型.长度.截面尺寸
【标准号】:DIN7263-1988
【标准状态】:现行
【国别】:德国
【发布日期】:1988-12
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:粗锉;设计;尺寸公差;形状;公差;手工工具;尺寸;长度;圆形;锉
【英文主题词】:Circularshape;Design;Dimensionaltolerances;Dimensions;Files(tools);Handtools;Length;Rasps;Shape;Tolerances(measurement)
【摘要】:Thisstandarddealswithraspsandcabinetfiles;itincludesthedimensions,thedesignationandthedesignofthesefilesandrasps.#,,#
【中国标准分类号】:J47
【国际标准分类号】:25_140_30
【页数】:3P;A4
【正文语种】:德语