[Users] Usrloc question

Daniel-Constantin Mierla daniel at voice-system.ro
Thu Nov 17 12:54:58 CET 2005


there is a solution using the branch_route[] in openser. For each branch 
created after the usrloc lookup you can make different checks.

So, in the branch route you have to check the IP in the R-URI and if 
matches the asterisk IP, then drop it 

There is an example how to check source and destination addresses, 
although in your case you can do it even without avps:


On 11/15/05 17:05, Darren Nay wrote:
> Hey all,
> I have a question regarding usrloc. I have run into a problem..
> We have static routes sent to an asterisk server for all of our SIP 
> usernames. In addition our IAD’s will register with the same username, 
> so that calls coming into our switch for that username will be routed 
> to both the asterisk box and the SIP IAD. This way, whichever endpoint 
> (IAD or asterisk) answers the call first will take the call.
> For example.
> root:/ # serctl ul show +18646404810
> <sip:+18646404810 at>;q=1;expires=-1012151
> <sip:+18646404810 at>;q=;expires=403
> is the asterisk server. This is a static route added by 
> serctl.
> is my IAD which registers with the switch every 10 minutes.
> So when calls are made to (864) 640-4810 then SER will send an INVITE 
> to both location.
> I explained all of this just to explain now what my problem is, and 
> ask if anyone may know a possible solution.
> Now, we also use asterisk to perform call fwd’ing functions. Asterisk 
> will answer the call and then originate another call out back to SER 
> to a new location. Now the problem! (finally!) This call fwd’ing 
> method works very well in most cases, except that if the call fwd’ing 
> is being sent to another location registered with SER then it will be 
> redirected back to asterisk again, albeit to a different URI, and 
> asterisk will kill the call because it thinks that it has looped 
> (which I guess it has… sort of).
> So, I’m wondering if there is possibly a way to retrieve only the 
> usrloc locations that don’t contain the IP address in the 
> contact URI? This way I can just check if the src_ip is 
> and if so then retrieve all the usrloc locations – without asterisk – 
> and the call will not be redirected back to asterisk.
> Is this possible? Or if anyone has any other ideas that may help then 
> I am definitely open to suggestions.
> Thanks for your help!!
> Darren Nay
> Ionosphere, Inc
> VoIP Network Development
> dnay at ionosphere.net <mailto:dnay at ionosphere.net>
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