rtpBreak detects, reconstructs and analyzes any RTP [rfc1889] session through heuristics over the UDP network traffic. It works well with SIP, H.323, SCCP and any other signaling protocol. In particular, it does not require the presence of RTCP packets (voipong needs them) that are not always transmitted from the recent VoIP clients.
You can download it from the following link: https://packetstormsecurity.com/files/download/56984/rtpbreak-1.0.tgz
Source: https://packetstormsecurity.com/files/56984/rtpbreak-1.0.tgz.html