[Freeswitch-users] How to setup TLS

Hello, has anybody managed to setup TLS? When I change tls to "true" in internal.xml, then freeswitch doens't listen on any ports (5060 5061). I use freeswitch 1.0.0-0ubuntu1~ppa4 Is there any tutorial available (could not find it while googling)? I would like to set it up with Snom phones (Snom320) Best regards Peter