[SIPForum-discussion] hi

[Patrick Timmons]

I'm sure I won't be the first to point out that this poster is only  
partially correct (while the branch is the same for 3xx-6xx responses  
to INVITE transactions, the branch in an ACK MUST be different for  
2xx-class responses), but I would like to call attention to a posting  
on the sip-implementors list that should be considered mandatory  
reading for curious about ACK behavior, specifically as it relates to  
branch construction.

http://www.mail-archive.com/sip-implementors@cs.columbia.edu/ 
msg06730.html

On Feb 9, 2007, at 10:57 AM, vinoth wrote:

> Hi
>
>      An ACK is not a new transaction.
>
>      It is a part of Invite Transations., and is used only to  
> acknowledge the final responses of Invite.
>
>      It reuses the same Branch ID as used in Invite.
>
>
>
> Regards,
> Vinoth Kumar.
> Mobax Networks, Coimbatore.
>
>
>
>
>
> ---------- Original Message ----------------------------------
> From: "darshan b n" <bn.darshan at gmail.com>
> Date:  Fri, 9 Feb 2007 15:32:36 +0530
>
>> Hi,
>> i want to know why ACK IS NOT AN TRANSACTION.............
>> I WANT TO know diff between Route and Record-Route................
>> please help me
>>
>> Regards
>>
>> Drshan
>>
>>
>>
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-------
Patrick Timmons
Vice President, Systems Engineering
Acme Packet, Inc.
ptimmons at acmepacket.com
desk: +1.781.328.4776
cell: +1.978.815.9628