[OpenSIPS-Users] b2b refer scenario

a.zagorskiy at oyster-telecom.ru a.zagorskiy at oyster-telecom.ru
Wed Jan 5 18:09:08 CET 2011

Uh yes, I was completely inattentive while reading the 

So, there is no other way that call 
b2b_init_request("refer") on each first INVITE to catch 
potential REFER request?..

Also, I need to call top hiding scenario on certain 
INVITEs. Is it possible to call 2 b2b_init_request at one 
time (top hiding + refer)? Or I should make 2 B2B 
transactions - first for potential REFER and second for 
'my' INVITEs? Last case doesn't look good...

On Wed, 05 Jan 2011 14:52:37 +0200
  Anca Vamanu <anca at opensips.org> wrote:
> Hi Anton,
> 01/05/2011 02:09 PM, a.zagorskiy at oyster-telecom.ru 
>> Hi Anca,
>> thanks for your reply, but could you explain a bit more?
>> I don't understand how B2B will understand that he 
>>should execute scenario on REFER request when 
>>b2b_init_request is calling on an INVITE request?
>> I'm talking about situation, where there are 2 UAs, they 
>>has established session, and one of them sending the 
>>REFER request to another.
> Yes, this is exactly how it works, by calling the 
>b2b_init_request on the initial Invite, so that B2BUA is 
>in the middle of the call and can control it. If you look 
>in the xml scenario file you will see that there is a 
>rule for REFER there - this is how it know that when a 
>REFER is received it has to do what it has to do.
> Try this out  and you will see ;) .
> Regards,
> -- 
> Anca Vamanu
> www.voice-system.ro
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