15. Informative References (资料性参考文献)

[6] Handley, M., Perkins, C. 与 E. Whelan, "会话通告协议 (Session Announcement Protocol)", RFC 2974, October 2000.
[7] Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston, A., Peterson, J., Sparks, R., Handley, M. 与 E. Schooler, "SIP: 会话初始协议 (SIP: Session Initiation Protocol)", RFC 3261, June 2002.
[8] Schulzrinne, H., Rao, A. 与 R. Lanphier, "实时流式协议 (Real Time Streaming Protocol, RTSP)", RFC 2326, April 1998.
[9] Schulzrinne, H. 与 S. Petrack, "DTMF 数字, 电话音与电话信号的 RTP 载荷 (RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals)", RFC 2833, May 2000.
[10] Handley, M., Schulzrinne, H., Schooler, E. 与 J. Rosenberg, "SIP: 会话初始协议 (SIP: Session Initiation Protocol)", RFC 2543, March 1999.

15. Informative References (资料性参考文献)​