【英文标准名称】:Informationtechnology-Telecommunicationsandinformationexchangebetweensystems-Corporatetelecommunicationnetworks;SignallinginterworkingbetweenQSIGandH.323;Calldiversionsupplementaryservices
【原文标准名称】:信息技术系统间通信和信息交换团体电信网QSIG和H.323之间信号互通呼叫变更补充业务
【标准号】:ISO/IEC21411-2001
【标准状态】:现行
【国别】:国际
【发布日期】:2001-08
【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】:数据传输;数据处理;电信;网络互连;信号发送系统;信息交换;通信规程;定义;补充业务;信息技术
【英文主题词】:Communicationprocedures;Dataprocessing;Datatransmission;Definitions;Informationinterchange;Informationtechnology;Networkinterconnection;Signallingsystems;Supplementaryservices;Telecommunications
【摘要】:ThisInternationalStandardspecifiessignallinginterworkingbetween"QSIG"and"H.323"insupportofcalldiversionsupplementaryserviceswithinaCorporatetelecommunicationNetwork(CN)."QSIG"isasignallingprotocolthatoperatesattheQreferencepointbetweenPrivateIntegratedServiceseXchanges(PINX)withinaPrivateIntegratedServicesNetwork(PISN).TheQreferencepointisdefinedinISO/IEC11579-1.APISNprovidescircuit-switchedbasicservicesandsupplementaryservicestoitsusers.QSIGisspecifiedinotherStandards,inparticularISO/IEC11572(callcontrolinsupportofbasicservices),ISO/IEC11582(genericfunctionalprotocolforthesupportofsupplementaryservices)andanumberofstandardsspecifyingindividualsupplementaryservices.ISO/IEC13873specifiestheQSIGprotocolinsupportofcalldiversionservices."H.323"isasetofsignallingprotocolsforthesupportofvoiceormultimediacommunicationwithinapacketnetwork,inparticularapacketnetworkthatusestheInternetProtocol(IP)asitsnetworklayerprotocol(IPnetwork).H.323signallingprotocolsoperatebetweenendpointsinanIPnetwork,eitherindirectlyviaoneormoregatekeepers,ordirectly.Anendpointcanbeaterminaloragatewaytoanothernetwork.H.323isan"umbrella"recommendationreferringtovariousITU-Trecommendations,inparticularRecommendationsH.225.0andH.245(basiccommunicationcapabilities)andRecommendationH.450.1(genericfunctionalprotocolforthesupportofsupplementaryservices).RecommendationH.450.3specifiestheH.323protocolinsupportofcalldiversionservices.NOTE-H.450.3appliesonlytothe1998versionofH.323(alsoknownasH.323version2)andtolaterversions.InbothISO/IEC13873(QSIG)andITU-RecommendationH.450.3(H.323),thecalldiversionsupplementaryservicesareCallForwardingUnconditional(SS-CFU),CallForwardingBusy(SS-CFB),CallForwardingNoReply(SS-CFNR)andCallDeflection(SS-CD).Thesesupplementaryservicesapplyduringcallestablishmentandprovidediversionofanincomingcalltoanotherdestination.InterworkingbetweenQSIGandH.323permitsacalloriginatingatauserofaPISNtoterminateatauserofanIPnetwork,oracalloriginatingatauserofanIPnetworktoterminateatauserofaPISN.ThisInternationalStandardprovidesthefollowingadditionalcapabilities:·acalloriginatingfromaPISNanddestinedforauserofanH.323networktobedivertedbytheH.323networktoanalternativedestination;·acalloriginatingfromanH.323networkanddestinedforauserofaPISNtobedivertedbythePISNtoanalternativedestination;·acalldestinedforauserofaPISNtobedivertedtoanalternativedestinationwherethatalternativedestinationisinanH.323network;·acalldestinedforauserofanH.323networktobedivertedtoanalternativedestinationwherethatalternativedestinationisinaPISN.ThisInternationalStandardisapplicabletoanyinterworkingunitthatcanactasagatewaybetweenaPISNemployingQSIGandanIPnetworkemployingH.323.
【中国标准分类号】:M11
【国际标准分类号】:33_040_35;33_160_60
【页数】:32P;A4
【正文语种】:英语
基本信息
| 标准名称： | 齿轮螺旋线计量器具检定系统 |
| 英文名称： | Measuring Instruments for Gear |
| 中标分类： |
综合 >>
计量 >>
长度计量 |
| 发布部门： | 国家技术监督局 |
| 发布日期： | 1990-03-26 |
| 实施日期： | 1990-12-01 |
| 首发日期： | |
| 作废日期： | |
| 起草单位： | 中国计量科学研究院 |
| 起草人： | 唐启昌、张伟 |
| 出版社： | 中国计量出版社 |
| 出版日期： | 1990-12-01 |
| 页数： | 10页 |
适用范围
本检定系统适用于齿轮螺旋线计量器具的检定。它阐述了国家基准的用途，基准所包括的全套计量器具的计量学参数，基准和各级标准直至工作计量器具传递齿轮螺旋线单位量值的程序及检定方法。规定了各级计量器具的不确定度及相应的保证措施，以切实保证检定系统的正确实施，保证螺旋线量值的传递与统一。
前言
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引用标准
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所属分类： 综合 计量 长度计量