On Mon, Apr 18, 2011 at 6:54 PM, chandan kumar <chandan_...@yahoo.co.in>wrote:

> Hi mayamatkeshi,
>
> You are right .Incase of remote cancel  Last Cseq header method should be
> INVITE (for 487)  . In my script  it was  CANCEL (for 487 ). thats why my
> Voip phone is not sending ACK.
>
> Now it works fine. Thanks a lot .
>
>
> Coming to Local Cancel. I have checked the INVITE & CANCEL request both are
> same except branch parameter in Via is different.
>
> I have attached my script & ethereal capture. Please let me know  why Sipp
> is changing branch parameter for CANCEL.
>
>

I told you in my first email:

Try this in the CANCEL:
  Via: SIP/2.0/[transport] [local_ip]:[local_port];branch=[branch-3]
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