[OpenSIPS-Users] B2BUA | Refer scenario not sending SDP

[Sam Govind]

Thanks Anca for the explanation, but can you just tell me if what I'm trying
to do here is possible with B2BUA or not? if you are saying that A side
Refer-to header will be read then obviously I need to take care of the
client1 and server1 parameters accordingly.

I've a FreeSwitch as Media-Server to play some IVR to User-A and collect
DTMF.OpenSIPS will be acting as B2BUA for this call.

Once DTMF are collected, Media-Server Refers the call back to OpenSIPS
At OpenSIPS I need to do some accounting on the collected DTMF    (I may
need more than one XML script to get the control back)
If I get OK from AAA then Send INVITE to the DTMF destination
else Send INVITE to Media-Server to play some Message.


On Tue, Aug 23, 2011 at 12:22 AM, Anca Vamanu <anca.vamanu at gmail.com> wrote:

> Hi Sam,
>
> Seems that you have a bad understanding of what the Refer scenario must do.
> Let's say A and B are in a call. When a Refer message is received from A,
> the B2B will terminate the call leg with A and will try connect B and the
> URI in the Refer-To header. The connection is done indeed by sending first
> an Invite without any SDP to B and doing a late SDP negotiation in 200OK and
> ACK.
> So what you observed, is in fact the wanted behavior.
>
> Regards,
> Anca Vamanu
>
> On Mon, Aug 22, 2011 at 1:07 PM, Sam Govind <govoiper at gmail.com> wrote:
>
>>
>> Hello,
>>
>>
>>
>> I’ve been trying to configure the REFER scenario<http://www.opensips.org/Resources/B2buaTutorial#toc15>but so far no luck. I've successfully called the scenario on initial INVITE
>> and seems like I'm getting B2B responses and replies but when I see sip
>> traces the following two anomalies exist.
>>
>>
>> 1- Refer-To header value is not used anywhere in new INVITE
>>
>> 2- SDP is not sent in new INVITE.
>>
>>
>> Please help.
>>
>>
>>
>> Best Regards,
>>
>> *Sam***
>>
>>
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>
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