[SR-Users] 404 Not Found - If User Not Registered

if I do lookup() What case does lookup return if entry exists but user not registered? lookup("location"); switch ($retcode) { case -1: case -3: sl_send_reply("404", "Not Found"); exit; case -2: sl_send_reply("405", "Not Found"); exit; }; should I just wrap this like this: if(registered("location")){ lookup("location"); switch ($retcode) { case -1: case -3: sl_send_reply("404", "Not Found"); exit; case -2: sl_send_reply("405", "Not Found"); exit; } }; The purpose I ask this rather simple question is because I want to redirect to voicemail if user is not registered. In the default script we have this case; failure_route[FAIL_ONE] { # uncomment the following lines if you want to redirect the failed # calls to a different new destination ##if (t_check_status("486|408")) { ## sethostport("192.168.2.100:5060"); ## append_branch(); ## # do not set the missed call flag again ## t_relay(); ##} } But it seems this case is never met; Because this code lookup("location"); switch ($retcode) { case -1: case -3: sl_send_reply("404", "Not Found"); exit; case -2: sl_send_reply("405", "Not Found"); exit; }; Seems to send a 404 response to the UA rather than go to failure route? Maybe I am wrong... Any advice would be appreciated.