http://arstechnica.com/business/2009/12/wired-for-sound-how-sip-won-the-voip-protocol-wars/
http://arstechnica.com/business/2010/01/voip-in-depth-an-introduction-to-the-sip-protocol-part-1/
http://arstechnica.com/tech-policy/2010/03/voip-in-depth-an-introduction-to-the-sip-protocol-part-2/
http://www.networksorcery.com/enp/protocol/sip.htm
http://java.sun.com/products/jain/JAIN-SIP-Tutorial.pdf
http://www.konnetic.com/documents/KonneticSIPIntroduction.pdf
http://www.konnetic.com/Documents/KonneticSIPIntroduction.pdf
http://www.konnetic.com/documents/KonneticSDPTechnicalOverview.pdf
本文深入探讨了SIP协议在VoIP通信中的角色,包括其如何在VoIP协议战争中胜出,以及详细介绍了SIP协议的基本概念和工作原理。
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