Los puntos que trata:
– Security vulnerabilities transitioning from POTS to VoIP
– Real Time Protocol (RTP)
– Asterisk and Inter-Asterisk Exchange (IAX)
– Session Initiation Protocol (SIP)
– Skype
– Cisco VoIP
Podeis leerlo aquí:
http://www.sans.org/reading_room/whitepapers/voip/2036.php