[1]JosefGlasmann,Wolfgang Kellerer, Harald Müller. “Service Architectures In H.323 And SIP: A Comparison” .

FourthQuarter2003,Volume 5, No.2.

[2]ITU-TRecommendationH.323 v4.

[3]RFC3261. SIP: Session Initiation Protocol, June 2002.

[4]李建芳.H.323和SIP在IP電話網絡中的互通.中國數據通信 2003.3. (尹阜琪編輯)

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