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YD/T 929-1997 19.2kbit/s以下速率基带调制解调器进网技术要求及检测方法

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基本信息
标准名称:19.2kbit/s以下速率基带调制解调器进网技术要求及检测方法
英文名称:Technical requirments and testing methods for up to 19.2kbit/s baseband modem connected to the telecommunication network
中标分类: 通信、广播 >> 通信设备 >> 数据通信设备
ICS分类: 信息技术、办公机械设备 >> 终端和其他外围设备
发布日期:1997-12-05
实施日期:1998-01-01
首发日期:1900-01-01
作废日期:1900-01-01
提出单位:邮电部电信科学研究规划院
归口单位:邮电部电信科学研究规划院
起草单位:邮电部电信传输研究所
起草人:昊亨伟、聂秀英
出版社:人民邮电出版社
出版日期:1998-01-01
页数:14页
适用范围

本标准规定了专线电路上使用的19.2k bit%s 以下速率基带调制解调器(不包括长线驱动器)的进网技术要求及检测方法
本标准适川于专线电路1几使用的19.2 kbit/s 以卜速率基带调制解调器(不包括长线V动器)的研制、生产、检测和维护

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所属分类: 通信 广播 通信设备 数据通信设备 信息技术 办公机械设备 终端和其他外围设备
【英文标准名称】:StandardPracticeforNumberingMetalsandAlloysintheUnifiedNumberingSystem(UNS)
【原文标准名称】:统一编号系统(UNS)中金属和合金编号的标准实施规程
【标准号】:ASTME527-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:A01.91
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:合金;铜;铜合金;铁合金;铁;轻质板材;金属;有色金属;编号;加筋;薄板材;钢产品;钢;带钢;结构钢
【英文主题词】:aluminumalloynumberingsystem;aluminumalloyUNSnumbering;castironnumberingsystem;castironUNSnumbering;copperalloynumberingsystem;copperalloyUNSnumbering;ferrousalloysnumberingsystem;ferrousalloysUNSnumbering;nickelalloynumb
【摘要】:TheUNSprovidesameansofcorrelatingmanynationallyusednumberingsystemscurrentlyadministeredbysocieties,tradeassociations,andindividualusersandproducersofmetalsandalloys,therebyavoidingconfusioncausedbyuseofmorethanoneidentificationnumberforthesamematerial;andbytheoppositesituationofhavingthesamenumberassignedtotwoormoreentirelydifferentmaterials.Italsoprovidestheuniformitynecessaryforefficientindexing,recordkeeping,datastorageandretrieval,andcrossreferencing.AUNSnumberisnotinitselfaspecification,sinceitestablishesnorequirementsforform,condition,quality,etc.Itisaunifiedidentificationofmetalsandalloysforwhichcontrollinglimitshavebeenestablishedinspecificationspublishedelsewhere.Note58212;OrganizationsthatissuespecificationsshouldreporttoappropriateUNSnumber-assigningoffices(3.1.2)anyspecificationchangesthataffectdescriptionsshowninpublishedUNSlistings.1.1Thispractice(Note1)coversaunifiednumberingsystem(UNS)formetalsandalloysthathavea"commercialstanding"(seeNote2),andcoverstheprocedurebywhichsuchnumbersareassigned.Section2describesthesystemofalphanumericdesignationsor"numbers"establishedforeachfamilyofmetalsandalloys.Sectionoutlinestheorganizationestablishedforadministeringthesystem.Section3describestheprocedureforrequestingnumberassignmenttometalsandalloysforwhichUNSnumbershavenotpreviouslybeenassigned.Note1UNSdesignationsarenottobeusedformetalsandalloysthatarenotregisteredunderthesystemdescribedherein,orforanymetaloralloywhosecompositiondiffersfromthoseregistered.Note2Theterms"commercialstanding,""productionusage,"andothersimilartermsareintendedtoapplytometalsandalloysinactivecommercialproductionanduse,althoughtheactualamountofsuchusewilldepend,amongotherthings,uponthetypeofmetalsandalloysinvolvedandtheirapplication.ThevariousstandardizingorganizationsinvolvedwiththeindividualindustriesapplytheirownestablishedcriteriatodefinethestatusofametaloralloyintermsofwhenaUNSdesignationnumberwillbeassigned.Forinstance,ASTMCommitteeA01requiresdetailsofheatanalysis,mechanicalproperties,andprocessingrequirementsforadditionofanewgradeoralloytoitsspecifications.TheCopperDevelopmentAssociationrequiresthatthematerialbe"incommercialuse(withouttonnagelimits);"theAluminumAssociationrequiresthatthealloybe"offeredforsale(notnecessarilyincommercialuse);"theSAEAerospaceMaterialsDivisioncallsfor"repetitiveprocurementbyatleasttwousers."Thus,whilenouniversaldefinitionforusagecriteriaisestablished,theUNSnumbersareintendedtoidentifymetalsandalloysthataregenerallyinregularproductionanduse.AUNSnumberwillnotordinarilybeissuedforamaterialthathasjustbeenconceivedorthatisstillinonlyexperimentaltrial.
【中国标准分类号】:H04
【国际标准分类号】:77_120_01
【页数】:7P.;A4
【正文语种】:


【英文标准名称】:Load-Bearing(TransverseandAxial)SteelStuds,Runners(Tracks)andBracingorBridgingforScrewApplicationofGypsumBoardandMetalPlasterBases
【原文标准名称】:螺钉安装石膏板及金属灰泥基板用承载(横向及轴向)钢墙骨、导板、系杆或隔栅撑
【标准号】:ASTMC955-1998
【标准状态】:作废
【国别】:美国
【发布日期】:1998
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:建筑;施工材料;灰泥;金属;板;支撑件;钢轨;熟石膏;螺钉
【英文主题词】:plasters;constructionmaterials;construction;metals;rails;screws(bolts);plasterofparis;bracings;plates
【摘要】:
【中国标准分类号】:Q70
【国际标准分类号】:91_060_10
【页数】:
【正文语种】:英语