Hi,

I have a basic sip question. What’s the correct r-uri for ACK? I use stateful forwarding, so all SIP messages pass through ser. I have seen two types of UA. Some use the contact field of 200 OK response as the r-uri and other use the original r-uri for INVITE.

Is it a SIP violation to use the original r-uri of INVITE? The problem here is that if there is a parallel forking for the INVITE, it might be sent to places other than the real callee.

Any comment?

Thanks,

Richard