References
- RFC 3261, M. Handley, H. Schulzrinne, E. Schooler, J. Resenberg "SIP: Session Initiation Protocol". IETF, Jun 2002
- RFC 1890, "RTP Profile for Audio and Video Conferences with Minimal Control", IETF, Jan. 1996
- http://asterisk.org/about. "What is Asterisk"
- "Review of Wireless Internet Security Technologies" , KISA 2001. 11
- Stephen A. Thomas, SSL and TLS Essentials, Wiey, 2000
- J.H.Nahm, "Compare & Implementation of IPsec VPN vs SSL VPN", Semyung Uni., 2004
- http://openvpn.net/. "OpenVPN"
- http://www.ethereal.com/introduction.html, "Features"
- TIA/EIA/TSB116, Voice Quality Recommendations for IP Telephony, Mar 2001