Hi Will,
It sounds like your kamailio.cfg is not looking up the user location database before trying to relay the INVITE.  There is a relevant section in the kamailio-basic.cfg example configuration file:

       

request_route {
	...

        # user location service
        route(LOCATION);
}
 
...

# USER location service
route[LOCATION] {
        if (!lookup("location")) {
                $var(rc) = $rc;
                t_newtran();
                switch ($var(rc)) {
                        case -1:
                        case -3:
                                send_reply("404", "Not Found");
                                exit;
                        case -2:
                                send_reply("405", "Method Not Allowed");
                                exit;
                }
        }

        # when routing via usrloc, log the missed calls also
        if (is_method("INVITE")) {
                setflag(FLT_ACCMISSED);
        }

        route(RELAY);
        exit;
}

The logic is that if the call is for a local registered user whose location is available in the "kamctl ul"  then request_route() should pass the request to the route(LOCATION) routine.  The function call lookup("location") then does the magic if matching the address of record ([subscriber_name]@[our_domain_name]) and returning the $ruri of the registered phone ([realid]@[realip]).  route(RELAY) is then able to send the call on to the phone's actual IP address.

Hope that helps.

Paul Smith

On 02/10/14 03:33, Will Ferrer wrote:

Hi

I was wondering if any one had any advice or examples for me of how to get a call to be routed to a subscribed softphone.

We have 2 boxes in our testing deployment, a load balancer / sbc and a call processing box.

Calls come in to the sbc, and then are passed to the call processing box. The call is analyzed and the branch uri is rewritten to a destination address when applicable for the call (this is how we handle routing of calls to certain numbers -- we do this utilizing custom code and a custom db).

This works just fine when the destination sip uri is phone number (in which case we do lcr) or if the destination goes to a remote address.

However when the destination is a subscriber: sip:[subscriber_name]@[our_domain_name], the call is passed back to the sbc, which passes it to the callprocessing box, back and forth until a too many hops error occurs.

The subscriber I am trying to send the call too does show up under "kamctl ul show".

I feel like there is something basic I must be missing here.

Does any one have any advice for me?

Thank you very much in advance.

All the best.

Will Ferrer

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