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

[Deepak Baskaran]

Hi Sunitha,
   Exactly. Why is it so? You rephrased Bihari Lal Gupta's question.




2011/6/17 sunitha r <sunitha.samiksha at gmail.com>

> 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,
> Sunitha.R
>
>
>
> 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*
>>
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