[OpenSIPS-Users] B2b module topology hiding

[Douglas Lane]

Hi Anca,

Ok I just need some clarity here as I think what I'm trying to achieve 
with the b2b module is not possible.

The topology needs to be hidden on any request between the UA <------> 
OpenSIPS SBC as well as OpenSIPS SBC <--------> OpenSIPS Router.

The reason this needs to happen is that the Router will then forward 
calls onto an Asterisk server for routing - the problem I've found is if 
you have 2 proxy servers upstream from asterisk, the ACK fails to be 
transported to asterisk due to Asterisk not adding itself to the Via 
header list.

So would you be able to confirm if the above is possible? The UA must 
only ever see the OpenSIPS SBC, and the Router must only ever see the 
OpenSIPS SBC - so effectively, the OpenSIPS SBC is acting as a true B2BUA.

I thank you for all your assistance thus far.

Thanks
Doug

On 2010/05/26 5:44 PM, Anca Vamanu wrote:
> No! :)
> I told you in the other mail - it is compulsory to call b2b_init_request
> on an initial Invite.
>
> Anca
>
>
> Douglas Lane wrote:
>    
>> Hi Anca,
>>
>> Thanks so much for the assistance. So would I then only call b2b_init in
>> the onreply_route block?
>>
>> This should make the concept a lot simpler.
>>
>> Thanks
>> Doug
>>
>>
>> On 2010/05/26 3:27 PM, Anca Vamanu wrote:
>>
>>      
>>> Hi Douglas,
>>>
>>> It seems a bit strange what you have there and I really don't believe
>>> that it can work. If you send 403 to the b2bua, it will send the 403
>>> back to the caller.
>>> The normal way to do this is first to pass the request to the Router and
>>> the router to pass the request back to the SBC and only at this time to
>>> call b2b_init on the request to hide the topology.
>>>
>>> Regards,
>>>
>>>
>>>
>>>        
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>>
>>      
>
>