[SIPForum-discussion] A question about INVITE fork

[Leks™]

After receiving 200 OK From any UAS, proxy sends CANCEL to the remaining
UAS.
-Raaz


On Wed, May 6, 2009 at 8:19 PM, Sunny <guangu.he at gmail.com> wrote:

> Hi allI have a question about INVITE fork. see follow picture.
>
> UAC                     Proxy            UAS1             UAS2
>    |---------INVITE----->|                      |                     |
>    |                          |-------INVITE--->|                     |
>    |                          |----------------------|-------INVITE-->|
>    |                          |<-------200--------|                     |
>    |<--------200---------- |                      |                     |
>    |----------ACK------->|                       |                    |
>    |                          |---------ACK----->|                    |
>    |                          |                       |
>  |
>    |                          |<-------------180---|--------------------|
>    |<------180-------------|
>
> when UAC received UAS2 180, the UAC have not corresponding transaction,the
> UAC will discard 180 or other?
>
> --
> Thanks
>
> Sunny
>
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