Hi Pankaj, Thanks for the response. But I am afraid your response does not answer my question. There are no RE-INVITE or BYE messages between ACK and the 200 OK. Immediately after an ACK is recieved, a 200 OK is sent. I doubt that there may be something missing in ACK because of which the UA is not accepting the ACK and hence sending the 200 OK. But i am not sure on that.
Regards Mahesh On Tue, 2004-11-30 at 11:01, [EMAIL PROTECTED] wrote: > > Hi Mahesh, > > As RFC 3261 mentions, the case wherein a 200 OK is sent after an ACK can > be in response to a RE-INVITE sent from either party. The other case can > be a response to a BYE message. > > Hope it answers your question. > > Thanks, > Pankaj. > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of mahesh > akarapu > Sent: Tuesday, November 30, 2004 10:48 AM > To: [EMAIL PROTECTED] > Subject: [Sip-implementors] 200 OK after recieving ACK > > Hi all, > I have a doubt regarding how ACK requests are handled. > I am trying to establish a SIP session. The following is the scenario. > A------------B > INV---------> > <----------100 > <----------180 > <----------200 > ACK---------> > Till this point, it is OK.But after this there are repeated 200Ok from B > as below. > <----------200 > ACK---------> > <----------200 > ACK---------> > > I guess according to the RFC 3261, once ACK is received, the UA should > stop sending the 200 OK.Could someone please tell me if this a possible > scenario, that is under what circumstances 200 OK is sent after > recieving ACK. I could not get the answer for this from the RFC. > > Could someone answer this. > > thanks > Mahesh > > > > _______________________________________________ > Sip-implementors mailing list > [EMAIL PROTECTED] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > > > > Confidentiality Notice > > The information contained in this electronic message and any attachments to > this message are intended > for the exclusive use of the addressee(s) and may contain confidential or > privileged information. If > you are not the intended recipient, please notify the sender at Wipro or > [EMAIL PROTECTED] immediately > and destroy all copies of this message and any attachments. _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
