My customer is doing an Avaya VOIP pilot. I am looking at traces in Wireshark to build my troubleshooting skills. I have found much documentation on VOIP, but little that focuses on protocol analysis and how the various protocols work together.
I can see H.323 in the trace, but some packets contain TPKT, Q.931 and H.225 while others do not.
Wireshark Statistics->RTP->Show All Streams shows 15 streams while Statistics->VOIP Calls shows only 1 call.
Can anyone point me at some good sources of information on how to understand VOIP at this level?