[SIPForum-discussion] Need suggestion

[tester voip]

guys,

The answer to syed's question is yes.
here i want to clarify some thngs.

This is true that branch parameter should be unique to all requests sent by
a ua.but it is valid for a cal.it is done to separate the trsnctns.
But when there are two separate requests outside of a cal,then this
parameter can be same.

Hope this clears your queries.

On Fri, Jan 4, 2013 at 9:18 PM, Santosh Iyer <spi6281 at yahoo.com> wrote:

> Ideally you would want to have a unique branch id. The branch id is used
> to identify a unique transaction If the First options message is answered
> with a 200 OK and then the second options message is sent then you might
> not see any issues because the first transaction is complete and the entity
> might have cleared the transaction.
>      But if the first options hasnt received a response and the
> transaction is ongoing the second OPTIONS would not be handled properly.
> For instance the second options might be dropped because it is associated
> with an ongoing transaction.
>
> Santosh
>
> --- On *Sun, 12/23/12, SYED IQBAL Ali <s.iqbalali2005 at gmail.com>* wrote:
>
>
> From: SYED IQBAL Ali <s.iqbalali2005 at gmail.com>
> Subject: [SIPForum-discussion] Need suggestion
> To: discussion at sipforum.org
> Date: Sunday, December 23, 2012, 1:49 AM
>
>
> Hi i have a question about branch parameter in Via header for below
> scenarios.
>
>
>
>
>
> Scenarios:
>
> 1)
>
> OPTIONS sip:user1 at Server_IP SIP/2.0
>
> Via:SIP/2.0/UDP Client_IP:9080;branch=z9hG4bKABC
>
> Call-ID: Call_ID1 at Client_IP:9080
>
> From: <sip:user1 at Client_IP:9080>;tag=1000000-0-803298131-9080
>
> To: <sip:user1 at Server_IP:5060>
>
> CSeq: 1 OPTIONS
>
> Content-Length: 0
>
> Contact: <sip:user1 at Client_IP:9080>
>
> Max-Forwards: 70
>
>
>
> ====================
>
> 2)
>
> OPTIONS sip:user2 at Server_IP SIP/2.0
>
> Via:SIP/2.0/UDP Client_IP:9080;branch=z9hG4bKABC
>
> Call-ID: Call_ID2 at Client_IP:9080
>
> From: <sip:user2 at Client_IP:9080>;tag=1000000-0-803298131-9080
>
> To: <sip:user2 at Server_IP:5060>
>
> CSeq: 2 OPTIONS
>
> Content-Length: 0
>
> Contact: <sip:user1 at Client_IP:9080>
>
> Max-Forwards: 70
>
>
>
> 1) My question is can we use same branch parameter in both OPTIONS
> requests having different call ids or not?
>
>
>
> -Call ids are different for both request.
>
> -SIP URI is different for both call legs.
>
> - To and from headers are different for both scenarios.
> -Cseq are different in both cases.
>
>
> --
> SYED IQBAL ALI
>
> s.iqbalali2005 at gmail.com <http://mc/compose?to=s.iqbalali2005@gmail.com>
>
> -----Inline Attachment Follows-----
>
>
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