� Hi Usama, See what rfc 3261 says,
"an ACK is only sent in response to a response to an INVITE request." I think it clears your doubt. Vivek On Fri, 21 May 2004 MANSOOR Usama FTRD/DMR/LON wrote : >Hi all, > > > >I'm looking at the call flows in RFC 3665 and it shows that 200, 302, >407, 480, 486 and 487 responses to an INVITE receive an ACK. Is this >true for all 2xx/3xx/4xx/5xx/6xx responses to an invite? Is an ACK >always sent when a UA receives a 2xx/3xx/4xx/5xx/6xx for an INVITE it >has sent? > > > >- Usama > > > > _____ > >Usama Mansoor, >France Telecom R&D UK Ltd. > >Chiswick Park, > >Building 3, > >566 Chiswick High Road, > >London, > >W4 5YA > > >Tel.: +44 20 8849 5858 > >Fax.: +44 20 8849 0991 > >Email: <mailto:[EMAIL PROTECTED]> >[EMAIL PROTECTED] > > > >"This e-mail, and any files transmitted with it, is intended only for >the use of the person/s or entity to whom it is addressed. If you are >not the intended recipient (or authorised to receive information for the >intended recipient) you must not use, disclose, copy, print or rely on >this e-mail. If an addressing or transmission error has misdirected this >e-mail, please notify the author by replying to this e-mail and delete >all copies of this e-mail. Thank you." > > > >_______________________________________________ >Sip-implementors mailing list >[EMAIL PROTECTED] >http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
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