blackboxSW854A-R3型号：SW854A-R3产品描述：Code-OperatedSwitch,RS-232,8-PortProductHighlightsSwitchyourserialdeviceswithcodes.Supportsspeedsto76.8kbps.Keepsyourconnectionsafe—onceaconnectionismade,otherportsarelockedout.Upgradedplatformwithimprovedfunctionalflexibility,includingintegratedtransceiverloopbackforfasterfaultdetection.FurtherDetailsDTE/DCE-selectable,soyoucanswitchbetweenamodemandaprinter.There'snoneedforcrossovercables.Safeforusewithlaserprinters.Includesaha***are-handshakeleadineachdirectionforaddedcontrol.Nounintendedtriggering—nomatterwhatdatayou'resending.Also***ailablewithfourports.TheintegratedCode-OperatedSwitch,RS-232,8-PortisanasynchronousRS-232switchwitheightsubordinateportsandonemasterportthatenablesyoutoswitchserialdeviceswithcodes.There'snounintendedtriggeringwiththisswitch—nomatterwhatdatayou'resending.WithaninternalDIPswitch,youselectthearmingcharactertouseasatrigger.YoucanseteachportindividuallyasDTEorDCE.That'shandyforswitchingamongmodemsandprinters.Andyourconnectionissecure.Onceaconnectionismade,otherportsarelockedout.(Rememberthatallportsneedtobesettooperatewithidenticalspeedsandwordstructures.)Forextracontrol,there'saha***are-handshakeleadineachdirectionincaseadevice(orthecomputer)needsit.Theupgradedswitchplatformhasseveralnewfeatures,including:Integratedtransceiverloopbackforfasterfaultisolation.Enhancedfront-panelLEDdisplaytoprovidevisualindicationofmoreswitchoperati***,includingstatusofdataactivity,switchtime,portlockout,andcontrolhandshake.Power-oninitializationthatincludesportselectiondefault.OnboardprogrammablePROMtoprovidefunctionupdatesandmaintenanceviaactiveserialandJTAGconnecti***.Thisproductworkswith:StandardRS-232Low-NoiseCable,25-Conductor,Male/Male(ECM25T,ECM25C)Questi***?ContactourFREETechSupport.)