【英文标准名称】:Informationtechnology-Telecommunicationsandinformationexchangebetweensystems-Corporatetelecommunicationnetworks;SignallinginterworkingbetweenQSIGandH.323;Genericfunctionalprotocolforthesupportofsupplementaryservices
【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之间信号互通支持补充业务的一般功能协议
【标准号】:ISO/IEC21409-2001
【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】:信息技术;定义;通信规程;信息交换;协议;专业网;信号发送系统;网络互连;电信;数据处理;数据传输;发信号
【英文主题词】:Communicationprocedures;Dataprocessing;Datatransmission;Definitions;Informationinterchange;Informationtechnology;Networkinterconnection;Privatenetworks;Protocols;Signalling;Signallingsystems;Telecommunications
【摘要】:ThisInternationalStandardspecifiessignallinginterworkingbetween"QSIG"and"H.323"insupportofgenericfunctionalproceduresforsupplementaryserviceswithinaCorporatetelecommunicationNetwork(CN)."QSIG"isasignallingprotocolthatoperatesattheQreferencepointbetweenPrivateIntegratedServicesexchanges(PINX)withinaPrivateIntegratedServicesNetwork(PISN).TheQreferencepointisdefinedinISO/IEC11579-1.APISNprovidescircuit-switchedbasicservicesandsupplementaryservicestoitsusers.QSIGisspecifiedinotherStandards,inparticularISO/IEC11572(callcontrolinsupportofbasicservices),ISO/IEC11582(genericfunctionalprotocolforthesupportofsupplementaryservices)andanumberofstandardsspecifyingindividualsupplementaryservices."H.323"isasetofsignallingprotocolsforthesupportofvoiceormultimediacommunicationwithinapacketnetwork,inparticularapacketnetworkthatusestheInternetProtocol(IP)asitsnetworklayerprotocol(IPnetwork).H.323signallingprotocolsoperatebetweenendpointsinanIPnetwork,eitherindirectlyviaoneormoregatekeepers,ordirectly.Anendpointcanbeaterminaloragatewaytoanothernetwork.H.323isan"umbrella"recommendation,referringtovariousITU-Trecommendations,inparticularRecommendationsH.225.0andH.245(basiccommunicationcapabilities)andRecommendationH.450.1(genericfunctionalprotocolforthesupportofsupplementaryservices).NOTE-H.450.1appliestothe1998versionofH.323(alsoknownasH.323version2)andtolaterversions.InterworkingbetweenQSIGandH.323permitsacalloriginatingatauserofaPISNtoterminateatauserofanIPnetwork,oracalloriginatingatauserofanIPnetworktoterminateatauserofaPISN.InadditionthisInternationalStandardenablestheparticipantsofacalltoexchangesupplementaryservicecontrolinformationinagenericway.ThemorespecificaspectsofinterworkingparticularsupplementaryservicesarespecifiedinotherStandards.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】:19P;A4
【正文语种】:英语


Product Code:SAE AIR1906
Title:Estimation of One-Third Octave Band Lateral Attenuation of Sound From Jet-Propelled Airplanes
Issuing Committee:A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
Scope: Data presented in this AIR are in terms of differences between one-third-octave-band free-field sound pressure levels and are intended for use in estimating far-field aircraft noise. Allowance may be made for the acoustic impedance of the ground surface and sound pressure levels at any height above the ground plane may be estimated. In estimating the long-term time averaged sound level at several locations around an airport served by a mix of airplane types under a variety of atmospheric conditions, airplane operational weights, and flight procedures, it would be more appropriate to use the method of prediction for lateral attenuation given in reference 1.