[SIPForum-discussion] B2BUA call flow.

[Roy, Nishant Kishore (CMS)]

Hi Sunitha,

Call id must be same for the 1 and 7 and for the 5th it depends on implementation , in proxy mode you can go with same and in B2BUA  you can provide different also .

Regards
Nishant

From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of sunitha r
Sent: Tuesday, April 12, 2011 4:56 PM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] B2BUA call flow.

Hello Xavi,
Thank you  for your response. But still i  need soem clarification.t.
The call-id for inleg and outleg are same or different? please justify your answer.
I wanted to setup the B2BUA call flow like this, what should be the call-id in Step(1),step(5),step(7).?
A                      B2BUA           B
        (1) INV Sdp A (inleg)
        -------------->
        (2) 200 Sdp B
        <--------------
        (3) ACK
        --------------->
        (4)      RTP
        <---------------------->

                                 (5) INV NO Sdp(outleg)
                                 --------------->
                                 (6) 200 Sdp C
                                  <--------------
        (7) ReINV Sdp C
        <---------------
        (8) 200 Sdp D
        --------------->          (9) ACK Sdp D
                                 ---------------->
        (10) ACK
        <---------------
        (11)           RTP
        <---------------------------------------->

Regards,
Sunitha.
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