This last chapter gave you an overview on how to troubleshoot problems in FreeSWITCH, what are the potential suspects (firewall, network, router, configuration), and how to check them.
Then we saw how to visualize the debug logs of FreeSWITCH and the signaling part of communication: SIP and Verto.
We looked at which documentation to read, where to find relevant information for solving our problems: mailing list archives, official documentation site, blogs, books.
If the problem is still there, and we've already researched it all, then we ask for help. Free, best effort help from community, commercial professional help from consulting@freeswitch.org.
If we believe to have encountered a FreeSWITCH bug, we must report it to https://freeswitch.org/jira/secure/Dashboard.jspa. Don't even bother to report it in mailing list.
As book closure we had a brief description...