Proper way to submit feature requests?

I’ve done a little searching on the site and forums for “Feature requests” and come up empty.
What is the proper place and format to submit a new feature request for FreePBX or a request for a change to an existing feature. I realize each could have a different procedure that’s why I mention both.

Thanks.

Use the bug tracker at http://www.freepbx.org/trac/newticket but in the “Type” dropdown, change it to “Feature Requests.”