Duxoft Voip Calls Recorder captures the RTP stream for recording VoIP calls. It records conversations in any of the major VoIP protocols, including H.323, SIP, MGCP, Skinny.
It can record the calls originated from the PC where recorder is installed or it can even record remote calls originated from other PCs or hardware phones. In latter case port spanning technique should be used (read more about port spanning here).
Major audio codecs are supported, including G.729, G.723.1, G.711, GSM.
Recordings are stored into wav files.
Demo version is available on http://www.duxoft.com