[SIPForum-discussion] Why ACK is separate transaction for INVITE

sunitha r sunitha.samiksha at gmail.com
Fri Jun 17 06:29:47 UTC 2011

Hi *Bihari Lal Gupta,*

In Sip, 2XX will be the final response for INVITE. So from INVITE to 2XX  is
one completee transaction and after 2XX response whatever comes it will be
considered as a separate transaction.

Thank you and Regards,

On Thu, Jun 16, 2011 at 12:11 AM, biharilal gupta <guptabihari at yahoo.com>wrote:

>   Hi,
> Can anyone pls tell me why ACK is a separate transaction in case of 2xx
> (Final response) of INVITE request, and why ACK is not considered a separate
> transaction in case of 486 busy response of INVITE.
> Thanks & Regards,
> *Bihari Lal Gupta*
> _______________________________________________
> This is the SIP Forum discussion mailing list
> TO UNSUBSCRIBE, or edit your delivery options, please visit
> http://sipforum.org/mailman/listinfo/discussion
> Post to the list at discussion at sipforum.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sipforum.org/pipermail/discussion/attachments/20110617/2608eccb/attachment-0002.html>

More information about the discussion mailing list