[Serusers] Accounting Failed INVITE Messages

[Java Rockx]

Hi All.

How do I get SER to account for failed INVITE messages? For example,
if someone attempts to call a PSTN number and they do not have the
free-pstn ACL, then our server replies with a 503 Service Unavailable.

I'd like to see this appear in the MySQL acc table. 

Do I just use the setflag() function in the failure route for INVITEs?

For example:

route {

    t_on_failure("1");
    if (!t_relay()) {
         sl_reply_error();
         break;
    }
}

faillure_route[1] {
    if (method=="INVITE") {
         setflag(1);
    }
}

Regards,
Paul