【英文标准名称】:Informationtechnology;Telecommunicationsandinformationexchangebetweensystems-Corporatetelecommunicationnetworks-SignallinginterworkingbetweenQSIGandH.323;Callcompletionsupplementaryservices
【原文标准名称】:信息技术.系统间电信和信息交换.企业电信网.QSIG和H.323间的信号网络互通.呼叫完成补充业务
【标准号】:ISO/IEC21991-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-06
【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】:电信;数据处理;数据传输;信息技术;补充业务;信号发送系统;网络互连;再呼叫;信息交换;通信规程;定义
【英文主题词】:Communicationprocedures;Dataprocessing;Datatransmission;Definitions;Informationinterchange;Informationtechnology;Networkinterconnection;Recalls;Signallingsystems;Supplementaryservices;Telecommunications
【摘要】:ThisInternationalStandardspecifiessignallinginterworkingbetween"QSIG"and"H.323"insupportofcallcompletionsupplementaryserviceswithinaCorporatetelecommunicationNetwork(CN)."QSIG"isasignallingprotocolthatoperatesattheQreferencepointbetweenPrivateIntegratedservicesNetworkeXchanges(PINX)withinaPrivateIntegratedServicesNetwork(PISN).TheQreferencepointisdefinedinISO/IEC11579-1.APISNprovidescircuit-switchedbasicservicesandsupplementaryservicestoitsusers.QSIGisspecifiedinotherStandards,inparticularISO/IEC11572(callcontrolinsupportofbasicservices),ISO/IEC11582(genericfunctionalprotocolforthesupportofsupplementaryservices)andanumberofstandardsspecifyingindividualsupplementaryservices.ISO/IEC13870specifiestheQSIGprotocolinsupportofcallcompletionservices."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.450.9specifiestheH.323protocolinsupportofcallcompletionservices.NOTE-H.450.9appliesonlytothe1998versionofH.323(alsoknownasH.323version2)andtolaterversions.InbothISO/IEC13870(QSIG)andITU-RecommendationH.450.9(H.323),thecallcompletionsupplementaryservicesareCompletionofCallstoBusySubscribers(SS-CCBS)andCompletionofCallsonNoReply(SS-CCNR).Thesesupplementaryservicesapplyafteracallestablishmentattempthasfailedbecausethecalleduserwasbusyornotavailable,andprovidemeanstore-establishthecallwhenthecalleduserbecomesavailable.InterworkingbetweenQSIGandH.323permitsacalloriginatingatauserofaPISNtoterminateatauserofaprivateIPnetwork,oracalloriginatingatauserofaprivateIPnetworktoterminateatauserofaPISN.Insuchascenario,thisInternationalStandardallowsthecompletionofcallswhenthecalleduserbecomesavailableafterhavingbeenbusy(SS-CCBS),orhavingnotansweredtheoriginalcall(SS-CCNR).InterworkingbetweenaPISNemployingQSIGandapublicIPnetworkemployingH.323isoutsidethescopeofthisInternationalStandard.However,thefunctionalityspecifiedinthisInternationalStandardisinprincipleapplicabletosuchascenariowhendeployedinconjunctionwithotherrelevantfunctionality(e.g.,numbertranslation,securityfunctions,etc.).ThisInternationalStandardisapplicabletoanyinterworkingunitthatcanactasagatewaybetweenaPISNemployingQSIGandaprivateIPnetworkemployingH.323.
【中国标准分类号】:M11
【国际标准分类号】:33_040_35
【页数】:23P;A4
【正文语种】:英语


【英文标准名称】:Leaderradiographicstands
【原文标准名称】:X射线照相装置导轮座
【标准号】:JISZ4906-1982
【标准状态】:作废
【国别】:日本
【发布日期】:1982-03-01
【实施或试行日期】:1982-03-01
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:Abolishment
【标准类型】:()
【标准水平】:()
【中文主题词】:医疗放射照相术;摄影设备;辐射摄影术
【英文主题词】:radiography;photographicequipment;
【摘要】:
【中国标准分类号】:N78
【国际标准分类号】:
【页数】:6P;A4
【正文语种】:日语