英文原版Sip Understanding the Session Initiation Protocol 4th Edition
Nowinitsfourthedition,theground-breakingArtechHousebestsellerSIP:UnderstandingtheSessionInitiationProtocoloffersyouthemostcomprehensiveandcurrentunderstandingofthisrevolutionaryprotocolforcallsignalingandIPTelephony.ThefourtheditionincorporateschangesinSIPfro
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