import step you need some sounds (you might choose codec {alaw,ulaw,g722,gsm} you want and language {en,en_AU,fr,es}, see http://packages.asterisk.org/centos/6/current/i386/RPMS/):
+
By default en language with ulaw are added. You may want to add some extra format and languages. (you might choose codec {alaw,ulaw,g722,gsm} you want and language {en,en_AU,fr,es}, see http://packages.asterisk.org/centos/6/current/i386/RPMS/):