Hello there,
I'm using t_set_fr(0,2000) on calls to registered phones but by any reason this isn't working, the call only enters on the failure route after 30 seconds in case of no response from SBC/Phone, anyone has any idea what can be the reason for that?

if(lookup("location")) {
                        xlog("L_INFO", "routing to registered phone ruid=$ruid R=$ru - ID=$ci \n");
                        t_set_fr(0, 2000);
                        t_on_failure("ASBC_FAILURE");
                        t_on_branch("ASBC_BRANCH");
                        route(RELAY);
                        exit;
    }

My RELAY route:
route[RELAY] {

        # enable additional event routes for forwarded requests
        # - serial forking, RTP relaying handling, a.s.o.
        if (is_method("INVITE|BYE|SUBSCRIBE|UPDATE"))
        {
                if(!t_is_set("branch_route")) t_on_branch("MANAGE_BRANCH");
        }
        if (is_method("INVITE|SUBSCRIBE|UPDATE"))
        {
                if(!t_is_set("onreply_route")) t_on_reply("MANAGE_REPLY");
        }
        if (is_method("INVITE"))
        {
                if(!t_is_set("failure_route")) t_on_failure("MANAGE_FAILURE");
        }

        if (!t_relay())
        {
                sl_reply_error();
        }
        exit;
}

version: kamailio 4.4.2 (x86_64/linux)

Thanks

Cumprimentos

José Seabra