Mastering SIP VOIP signaling, media, voice issues, DTMF debugging with wireshark/tshark/tcpdump HD

This is ultimate guide to how to debug SIP (session initiation protocol), VOIP (voice over IP) , RTP (real time protocol) with tools,. This will answer all questions of how to using tools for VOIP debugging. This is mastering SIP tools. Debugging voice issues, signaling issues, capturing DTMFs