[OpenSIPS-Users] b2b top hiding

[Anca Vamanu]

Hi Anton,

On 12/23/2010 06:41 PM, Anton Zagorskiy wrote:
> Hi.
>
> Could you some explain about interaction between original INVITE transaction
> and b2b top hiding's transaction?
>
They are different transactions. The first one is not forwarded and is 
replied by the server. And the second one is created by the server and 
replied by a client.
> As I see that b2b transmits all sip packets to the original INVITE
> transaction via loopback interface.
> And in the failure situation in the B2B transaction my failure route was
> calling. But failure route wasn't calling in the original transaction. Why?
>
Failure route is called when a negative reply is received. For the first 
transaction no reply is received - OpenSIPS is the one generating the 
replies.
To have this functionality you should either loop the request once 
before calling b2b_init_request or have another openSIPS instance in front.

Regards,

-- 
Anca Vamanu
www.voice-system.ro