Calls are not sent directly to the "features" context of the demo configuration. Instead, the extensions listed in features context are there to be "executed" by other contexts.

Let's say the features context is a repository for, uhm, features ready for consumption.

For example, extensions in demo features context are able to emulate "call transfer" feature even in phone that does not have a "call transfer" button.

The XML dialplan's features context in demo configuration is in /usr/local/freeswitch/conf/dialplan/features.xml file