This is somewhat technical, but a pretty good and concise overview of possibile solutions finders.
How To Debug and Troubleshoot VOIP – voip-info.org
http://www.voip-info.orgWed, 03 Apr 2013 07:00:00 GMT
Debugging and troubleshooting VOIP problems.(SIP, MGCP, H.323, RTP, Skinny etc.)One of the primary techniques is to view what is actually getting sent and received by VOIP devices. There are several ways to do this: …
