davor jovanovic wrote: > sip:mister at no.com -> “404 Not Found” -> use aliases -> sip:1234 at no.com > -> t_relay -> GW -> PBX Maybe something like that? route{ ... t_on_failure("1"); t_relay(); } failure_route[1]{ if(t_check_status("404")){ lookup("aliases"); rewritehostport("your.gateway", "5060"); t_relay(); } } HTH, Andy