chamilo-lms/plugin/bbb/config.php

<?php
/* For licensing terms, see /license.txt */

/* bbb parameters that will be registered in the course settings */

$variables = array( 'big_blue_button_meeting_name',
                    'big_blue_button_attendee_password',
                    'big_blue_button_moderator_password',
                    'big_blue_button_welcome_message',
                    'big_blue_button_max_students_allowed'    
);