Dear all, I found a problem in using t_uac_dlg to send INVITE via FIFO. When it got a 200 OK response, it sends ACK automaticlly. I saw the Via branch parameter value in the ACK is the same with the value in INVITE. But based on RFC3261 sec.13.2.2, and sec.8.1.1.7, the branch parameter value in ACK should not be the same for 2xx response. Is there any patch code?? -- Kevin Kuei ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.