In this chapter, we looked at how to obtain XML snippets dynamically, and how to fall back to filesystem if we fail.

We used two mechanisms for the same aim: getting the same XML snippet.

We can use mod_xml_curl to interrogate a remote or local database.

We can use one of the supported scripting languages to build/retrieve the XML snippet.

We also saw the caveats: FreeSWITCH will need a very very fast execution of those lookup and timeouts to protect the users from sluggish backend applications.

In the next chapter, we will see how to control FreeSWITCH externally, via ESL, the most powerful way to micromanage what FreeSWITCH does.