dialogic 摘挂机的检测

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1、DisconnectSupervisionWhenthecallerhangsup,Dialogiccarddoesnotdetectthedisconnection.Why?MostofthePBXsandswitchestodaydonotuseloopcurrentdroptonotifytheotherpartyofthedisconnection.Instead,Theyuse"disconnecttone",whichisusuallythesameasbusytone.Disconnecttone

2、willbesenttothecalledpartyassoonasthecallingpartyhangsup.Forlocalcalls,however,thedisconnecttoneisusuallysenttothecallingparty30secondsafterthecalledpartyhangsup.Dialogiccards,bydefault,isenabledtodetectloopcurrentdrop.However,disconnecttonesupervisionisnote

3、nabled.HowtoimplementDisconnectToneSupervision?Therearetwowaysofimplementation:AdvancedToneFeature(driverapproach)GlobalToneDetection(applicationapproach)1.AdvancedToneFeatureThisfeatureiscurrentlyavailableonDOS,Windows95andWindowsNT(StreamsversionSDKonly).T

4、hismethodmakesuseofToneSetFilecreatedbyPBXpertorPBXpert/32.BysimplyusingappropriateTSFfile,youcanmakeyoursystemtoworkonanyanalogswitchesorPBXs.Toenablethisfeature,dothefollowing:ForWindowsNT:ClickStart/Programs/DialogicSystemSoftware/AdvancedToneFeaturesprog

5、ramitem.ThentickDisconnectToneSupervisionandToneSetFileEnabledbuttonsontheAdvancedToneFeatureswindow.Lastly,specifytheTSFfiletobeused.ForWindows95:SimilartothatofWindowsNT.ThepathisStart/Programs/DialogicDevelopmentPackage/ConfigurationManager.ThenclickAdvan

6、cedbuttonontheDialogicConfigurationManagerwindow.ForDOS:AfterDialogicvoicedriverisloaded,runTONEDNLD.EXEprogramtooverwritethedefaulttonedefinitionscontainedinthedriverwiththosecontainedintheTSFfile.genloadd40drv-hTONEDNLD-f

7、tsf>-hAfterATFisenabled,thedefaulttonedefinitionscontainedinthedriverareoverwrittenwiththosecontainedintheTSFfile.Whenthedisconnecttoneisdetected,anLCOFFeventwillbegenerated,asifitisaloopcurrentdropevent.Theexampleinasynchronouscallbackmod

8、elbelowshowshowtoterminatedx_play()functionupondetectionofdisconnecttone.voidstart_playback(intindex){DV_TPTtpt[1]={0};dx_clrtpt(tpt,1);tpt[0].tp_type=IO_EOT;tpt[0].tp_termno=DX_LCOFF;tpt[0].tp_