[Sip-implementors] INVITE and ACK

[Radhika]

Hello All,    I have a doubt regarding matching an INVITE with its corresponding ACK. In my current application, I have done so using the CallId and CSeq header values and am having no problems regarding the working of this aspect.    However, in one of the mails on this list, I read that even From and Request-URI headers need to be used to perform this match.    Under what conditions will my check fail. I shall be grateful if any suggestions or solutions are given.   Thanks and Regards, Radhika.