The online reference provides usage prototypes and examples for the channel variables, dialplan applications, and API commands that can be accessed via E.S.L. (the Event Socket Layer) or with scripts written in Lua, Perl, and others. The reference section will also present a list of changes published periodically to document bug fixes, patches, and feature additions. The lower group of links in the outline to the left provide reference information to configure and experiment with FreeSWITCH.
Reference documentation of core API functions can be found on FreeSWITCH Tech Reference.