[SR-Users] Routing calls to a subscribed softphone

[Paul Smith]

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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