Failure Route Issue - sr-users

17 Apr 2018

Hey All,

I have a weird issue.  I’m sending a SIP INVITE to a SIP Service that send’s me back a
433, which let’s me know that the number is invalid.  I then send an INVITE to a media
server (FreeSwitch) to play a message that the number can’t be called, which looks to be
working.  But, the final ACK from the SIP client is sent back to the SIP Service versus
the media server.  The following diagram below depicts this: https://snag.gy/qMWfvk.jpg. 
The code snippet in the failure_route for the the SIP Service has this:

 if (t_check_status("403|433")) {
                if ($avp(s:teleblock_media_enabled) == "1") {
                        # make sure media server can route back to kamailio
                        record_route();
                        revert_uri();
                        $ru = "sip:" + $T_reply_code + $rU + "@" +
$sel(cfg_get.teleblock.media_ip) + ":" + $sel(cfg_get.teleblock.media_port);
                        append_branch();
                        t_relay();
                        exit;

                }