A sample call and how to record with tcpdump and decode with tcpdump, ethereal, and ipgrab.
- Running /usr/local/vocal/bin/sipset as user 1010 on a linux PC named "tlclab01" (which will have the SIP URL sip:1010@192.168.194.24) and making a call to 1010@172.18.194.18 (which will have the SIP URL sip:1010@172.18.194.18). Thus user 1010 on tlclab01 makes a call, which user 1010 on 172.18.194.18 (a Cisco ATA 186) answers.
  At the end of the call, the user on tlclab01 hangs up.
- SIP-call-example
- rtp-filter.ethereal
- example-call.tcpdump
An example paper from 2011: Javier Lara Peinado and Víctor Ariño Pérez, Context-aware VoIP
Examples of written reports submitted in 2004:
- Andreas Ångström and Johan Sverin, VoiceXML
- Khurram Jahangir Khan and Ming-Shuang Lang, Voice over Wireless LAN and analysis of MiniSIP as an 802.11 Phone
- Both of the above reports appear here with permission of the authors.
Stefano Ventura, VoIP & Security for Enterprise, Séminaire Grifes, Institute of Information and Communication Technologies (IICT), Haute Ecole d'Ingénierie et de Gestion du Canton de Vaud (HEIG-VD), Yverdon Switzerland, 8.11.2005 - a very nice introduction to VoIP security (in french)