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1、FOURTHEDITIONAsterisk™:TheDefinitiveGuideRussellBryant,LeifMadsen,andJimVanMeggelenAsterisk™:TheDefinitiveGuide,FourthEditionbyRussellBryant,LeifMadsen,andJimVanMeggelenCopyright©2013RussellBryant,LeifMadsen,andJimVanMeggelen.Allrightsreserved.PrintedintheUnitedStat
2、esofAmerica.PublishedbyO’ReillyMedia,Inc.,1005GravensteinHighwayNorth,Sebastopol,CA95472.O’Reillybooksmaybepurchasedforeducational,business,orsalespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformation,contacto
3、urcorporate/institutionalsalesdepartment:800-998-9938orcorporate@oreilly.com.Editors:MikeLoukidesandNathanJepsonIndexer:FredBrownProductionEditor:KristenBorgCoverDesigner:KarenMontgomeryCopyeditor:BeccaFreedInteriorDesigner:DavidFutatoProofreader:KielVanHornIllustra
4、tor:RebeccaDemarestMay2013:FourthEditionRevisionHistoryfortheFourthEdition:2013-05-07:FirstreleaseSeehttp://oreilly.com/catalog/errata.csp?isbn=9781449332426forreleasedetails.NutshellHandbook,theNutshellHandbooklogo,andtheO’ReillylogoareregisteredtrademarksofO’Reill
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7、ein.ISBN:978-1-449-33242-6[LSI]TableofContentsForeword.....................................................................xixPreface......................................................................xxv1.ATelephonyRevolution......................................
8、................1AsteriskandVoIP:BridgingtheGapBetweenTraditionalandNetworkTelephony2TheZapataTelephonyProject2MassiveChangeRequiresFlexib