[SIPForum-discussion] The missed Call with PRACK terminated using BYE or Cancel

[pankaj Rajan]

Hi All,

  Why we are talking about BYE and CANCEL?  Is UAC disconnecting before
establish a call? If UAC is disconnecting a call then UAC will send CANCEL
always.  Why i am asking because it is not mention in query description.

Best Regards,
Pankaj Rajan


On Fri, Jan 24, 2014 at 5:04 AM, Aniella Juverdeanu <
Aniella.Juverdeanu at telus.com> wrote:

> I don't think is correct to have BYE - it should be CANCEL - I always see
> it. Another example is if the caller got announcement - 183 and PRACK -
> then CANCEL
>
>
>
> *From:* discussion-bounces at sipforum.org [mailto:
> discussion-bounces at sipforum.org] *On Behalf Of *Murali ZTE
> *Sent:* January 17, 2014 11:50 PM
> *To:* discussion at sipforum.org
> *Subject:* [SIPForum-discussion] The missed Call with PRACK terminated
> using BYE or Cancel
>
>
>
> Hello Guys,
>
> I have one query regarding PRACK for the following scenario  my SIP client
> sending BYE message instead of Cancel.Is it right behavior? because the
> session is not established for the initial INVITE.or its behaving correctly
> because of PRACK.Could anyone explain this behaviour ?
>
> UAC-------INVITE-------------->UAS
> UAC<-----1xx------------------>UAS
> UAC<-----180(Rseq)----------UAS
> UAC--------PRACK(Rack)--->UAS
> UAC<-----200 OK(PRACK)--UAS
> UAC-------- BYE-------------->UAS
>
>
> Thanks and Regards
> Murali
>
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