SAE AMS7212 * (Cancelled Jul 2002)
时间:2024-05-19 03:10:32 来源: 标准资料网 作者：标准资料网 阅读：9035
Product Code:SAE AMS7212
Title:* (Cancelled Jul 2002)
Issuing Committee:Ams F Corrosion Heat Resistant Alloys Committee
Scope:
【英文标准名称】:Privatebranchexchangesforconnectiontopublicswitchedtelephonenetworksrunbycertainpublictelecommunicationoperators-Directdiallinginonprivatebranchexchanges-Specificationfordirectdiallinginonprivatebranchexchangeswithtermina
【原文标准名称】:由某些公共长途电话接线员操作的与公共开关电话网络连接的专用分组交换机.专用分组交换机直接拨号.第1节:与整体终端站连接的专用分组交换机直接拨号规范
【标准号】:BS6450-3.1-1993
【标准状态】:作废
【国别】:英国
【发布日期】:1993-01-15
【实施或试行日期】:1993-01-15
【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】:通信设备;电话设备;电流;信号电平;性能;合格;电话交换站;电话交换设备;电路;性能试验;电话;阻抗测量;信号;电学测量;电信系统;试验设备
【英文主题词】:Circuits;Communicationequipment;Conformity;Electriccurrent;Electricalmeasurement;Impedancemeasurement;Performance;Performancetesting;Signallevel;Signals;Telecommunicationsystems;Telephoneequipment;Telephoneexchanges;Telephoneswitchingequipment;Telephony;Testequipment
【摘要】:BS6450specifiesrequirementsforprivatebranchexchanges(PBXs)thatarenecessaryforcorrectinterworkingwithpublicswitchedtelephonenetworks(PSTNs)runbycertainpublictelecommunicationsoperators(PTOs).ThisSectionofBS6450specifiesrequirementsattheconnectionpoint(seeclause7ofBS6450:Part1:1993)fordirectdiallingin(DDI)onPBXsconnectedattheuser'spremisesdirectlyorviaoneormorepiecesofotherapparatusorwiringtothe2-wirepresentedDDIanalogueinterfaceofaPSTNandwheretheterminatingstationsandtheircablingaretreatedwiththePBXasanentirety.ThisSectionofBS6450appliestoPBXswiththeirterminatingstationsthatareinstalledonasinglesetofpremises.ThisSectionofBS6450specifiesrequirementsthatapplyintheeventofamajorequipmentfailure(MEF)ofthePBXexceptthatrequirementsforDDIexchangelinesswitchedbythePBXtoaportfortheconnectionofexternalequipmenttobeusedunderMEFconditions,remainunderconsideration.ThisSectionofBS6450doesnotofitselfspecifythecompleterequirementsforaparticularPBXinstallationandneedstobereadinconjunctionwithBS6450:Part1:1993andBS6450:Part2:1993(seeclause5ofthisSectionofBS6450)and,asappropriate,BS6450:Section5.1:1993,BS6450:Section6.1:1993andBS6450:Part7:1990.ThisSectionofBS6450doesnotatpresentspecifytherequirementsforPSTNtoPSTNconnection.RequirementsforportsonthePBXtowhichexchangelines,privatecircuits,privatelinks,orothervoiceordataterminatingstationsareconnected,orforfacilities,arenotspecifiedinthisSectionofBS6450.NOTE1.WherereferenceismadeinthisSectionofBS6450toaparticularclauseinanotherpublication,therequirementsareapplicableirrespectiveofthescopeofthatpublication.Anyclausesofanotherpublicationnotspecificallyinvokeddonotapply.NOTE2.Unlessotherwisestated,allclausereferencesrefertothisSectionofBS6450.NOTE3.BackgroundinformationisprovidedinannexAontheDDIservice,andinannexBonstandbypower.NOTE4.CompliancewiththisSectionofBS6450isintendedtoprovideforsafetyandthepreventionofinterferencewiththePTO'snetworksandotherusers,butcompliancewillnotnecessarilyensurethattheapparatusissatisfactoryfortheuser'spurpose.
【中国标准分类号】:M10
【国际标准分类号】:33_040_30;33_040_35
【页数】:34P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodsforHygroscopicMoisture(andOtherMatterVolatileUndertheTestConditions)inPigments
【原文标准名称】:颜料吸收的水份(及试验条件下挥发的其他物质)的标准试验方法
【标准号】:ASTMD280-2001
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【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】:涂料;颜料;试验
【英文主题词】:pigments;paints;testing
【摘要】:
【中国标准分类号】:G53
【国际标准分类号】:87_060_10
【页数】:2P;A4
【正文语种】:英语